Re: App Engine supports Java
There's also always Amazon's EC2... Yeah, but the nice thing about app engine is that it's *just* app server, nothing else. So you don't have to muck with IPs, sys admin, configs, updates or whatever. Whereas EC2 is just like a box, you have to do everything yourself (but don't have to deal with hardware). Alas, the environment is too restricted to use even plain WO (or EOF with any common DB). One would need to write a new WOAdaptor, not create worker threads and then you'd have a single-threaded machine that might go down any minute. Given some of my apps almost take 20 secs to launch, that's not an attractive option... would make a nice hack, though :) Cheers, Anjo Am 17.04.2009 um 06:44 schrieb Jake MacMullin: There's also always Amazon's EC2... http://aws.amazon.com/ec2/ Cheers, Jake On Thu, Apr 9, 2009 at 12:34 AM, Anjo Krank a...@krank.net wrote: http://googleappengine.blogspot.com/ WO in the cloud, anyone? Cheers, Anjo PS: And they support Fortran 77, too! ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/jmacmullin%40gmail.com This email sent to jmacmul...@gmail.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Multiple instances of WOA's deployed as WAR's
Hello A recent posting said that war file deployment just works (it's not an exact quote, but that how i remember it). I've considered deploying WOA's in servlet containers, but there a few issues i just can't see how they will work if I run deploy an app to a servlet container cluster. 1) The default session store is memory resident, does WOSession hook into whatever session distribution i setup for the containers? 2) The instance number. As far as i can see this property becomes meaningless when running in servlet containers. If the session can be distributed, this may not be an issue, but i not Can help me answering these by sharing their experience with this or link me in the right direction (before i go experiment with it)? Cheers Tonny ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Multiple instances of WOA's deployed as WAR's
Hello Tonny; [Disclaimer; As I said to somebody else off-list recently, I did quite a bit of investigation into this in 2005/6, but never got to production deployment as the client wanted to stick with wotaskd in the end -- so I am speaking from testing / theory] http://wiki.objectstyle.org/confluence/display/WO/Web+Applications-Deployment-Tomcat+Deployment 1) The default session store is memory resident, does WOSession hook into whatever session distribution i setup for the containers? I don't think that actually works - the sessions are sticky to one container. 2) The instance number. As far as i can see this property becomes meaningless when running in servlet containers. If the session can be distributed, this may not be an issue, but i not Correct; and in WO 5.4 I see for example in WOContext.completeURLWithRequestHandlerKey(..) the application number appearing and I don’t know if this is a good idea with respect to systems which should be able to run on wotaskd *AND* servlet. At the very least, it should be noted that this will not work with a servlet WebObjects application. I think the application number should absolutely not be depended upon in the general. If you use, for example, the Apache 2.2 mod_balancer or Apache 1's mod_jk, the front-end web-server will load-balance the requests over a number of containers -- eg; Jetty or Tomcat. Each container in the cluster gets an identifier (basically an instance number) and if a request creates or references a session then the URL's generated will contain a path back to the specific container where the session lives. The reference is in the URL like this... .../MyApp.woa/wo/4.2.13.0;jsessionid=H6qOeduw.7771as1?key=value ...but is ultimately parsed by the load balancer. This means that sessions do not need to be serialised between containers as the requests are sticky to specific container. Although not directly applicable, section 10 of... http://homepage.mac.com/andrewlindesay/le/manuals/lewostuff/LEWOStuffOverview.pdf ...maybe interesting for you to read over. It describes an AJP adaptor I wrote some years ago which allows a standard WOA to integrate into this sort of deployment using the AJP protocol, but the same concepts apply to servlet. Note also that I am fairly sure the transport between the front-end web-servers' load-balancers and the containers can be HTTP or AJP – this is not AJP specific. Apache 2.2 also has a balancer manager service which allows you to turn containers on and off in terms of routing of traffic. Put some stuff into or augment the wiki if you take this path. cheers. ___ Andrew Lindesay www.lindesay.co.nz ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Multiple instances of WOA's deployed as WAR's
On Apr 17, 2009, at 3:26 AM, Tonny Staunsbrink wrote: Hello A recent posting said that war file deployment just works (it's not an exact quote, but that how i remember it). Yeah, I think that was me. I should have said: Simple, single instance servlet deployments just work. If you create a basic app and select the servlet options, you'll get a WAR file you can deploy to a servlet container without any additional work. It used to be quite a bit of messing around just to get a working servlet build. When you start talking more advanced things like multiple instances and such, I think it is still very much a case of lots of things need to be done. My servlet deployments are very simple so I have never gone that extra mile. Dave I've considered deploying WOA's in servlet containers, but there a few issues i just can't see how they will work if I run deploy an app to a servlet container cluster. 1) The default session store is memory resident, does WOSession hook into whatever session distribution i setup for the containers? 2) The instance number. As far as i can see this property becomes meaningless when running in servlet containers. If the session can be distributed, this may not be an issue, but i not Can help me answering these by sharing their experience with this or link me in the right direction (before i go experiment with it)? Cheers Tonny ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/webobjects%40avendasora.com This email sent to webobje...@avendasora.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: JavaXML.framework Question
The problem has been around since we started deploying apps as servlets going back several years now. I think it might have something to do with this snippet I found in the Tomcat docs ( http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html) ... For some classes (such as the XML parser components in J2SE 1.4+), the J2SE 1.4 endorsed feature can be used (see the common classloader definition above). Last, any JAR containing servlet API classes will be ignored by the classloader. ... The javaxml framework contains javax.servlet.http.* classes. I suspect that in a servlet deployment this is causing the javaxml framework to be ignored. These classes are probably needed when running as a regular WOA application in JavaMonitor if you are using the built in web services functionality. I am going to try removing them today and see if that helps hopefully the house of cards wont fall down. Dov Rosenberg On 4/17/09 12:40 AM, Jake MacMullin jmacmul...@gmail.com wrote: I've encountered this same problem (sans-wonder) when deploying WebObjects applications built as WARs to Tomcat, JBoss (with a Tomcat servlet container) and Glassfish application servers - though not with Jetty. I'd really like to know more about what might be causing this problem and what the solution is. I suspect that it might be due to incompatibilities between versions of java libraries included within the javaxml.jar and different versions of the same libraries provided by the various application servers. I'm currently seeing if I can figure out exactly what is causing this problem as it is a serious issue if we're unable to deploy to JBoss/Tomcat as that's our current server set-up. I first noticed this problem with WO 5.4.x (sans-wonder). Regards, Jake On Wed, Apr 15, 2009 at 2:18 AM, Dov Rosenberg drosenb...@inquira.com wrote: Yes, we have swapped over to Wonder a few months ago. I have run into this prior to Wonder though. Dov On 4/14/09 12:01 PM, David Avendasora webobje...@avendasora.com http://webobje...@avendasora.com wrote: Hi Dov, Are you using Wonder with your Tomcat servlet apps? I've run into some classpath weirdness with running the two together. The weirdness I see is different from what you are running into, but maybe they are related... Dave On Apr 14, 2009, at 11:39 AM, Dov Rosenberg wrote: We deploy our apps as servlets in Tomcat. We have been deploying them that way for the past few years. Recently I have been updating our build scripts to steamline them. For some reason even though we include the javaxml.jar (from the JavaXML.framework) in our WEB-INF/lib folder the Tomcat class loader can¹t seem to find classes that I can see in the jar. For example at startup if I don¹t include xercesImpl.jar in my WEB-INF/lib along side javaxml.jar I will see the following error java.lang.NoClassDefFoundError: org/apache/xml/serialize/OutputFormat: org/apache/xml/serialize/OutputFormat That class is in both the xercesImpl and javaxml.jar¹s The same seems to apply for the xalan, axis, wsdl, etc classes. Should we be deploying the JavaXML.framework at all? It seems that if we do not the webservices functionality built into WebObjects gets broken. Seems like a waste to deploy all of these duplicate wars. Thanks in advance for any feedback Dov Rosenberg ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com http://Webobjects-dev@lists.apple.com ) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/webobjects%40avendaso ra.com This email sent to webobje...@avendasora.com http://webobje...@avendasora.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/jmacmullin%40gmail.com This email sent to jmacmul...@gmail.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: JavaClient offline storage / replication
Le 09-04-16 à 07:50, Anjo Krank a écrit :
You could probably also serialize Adaptor ops that occur after
ec.saveChanges() using sth like the ERXAdaptorOperationWrapper and
have some custom code dealing with conflicts. At least this would
allow you to handle things in code, not in SQL.
I had to sync 2 deployement site of the same WO app. It didn't have
to be real time, just sync at will. So my first thought was to save
operation on one site, transfert them on the other site and reapply
them over there.
I have part of it implemented, only the 'saving' part.
It simply a delegete that implement
databaseContextWillPerformAdaptorOperations(...), iterate over the
list of operations and create new EOAdaptorOperation that save a
serialized version of desired operations.
Here is a code snippet :
public NSArray databaseContextWillPerformAdaptorOperations(final
EODatabaseContext dbCtxt, final NSArray adaptorOps, final
EOAdaptorChannel adChannel) {
NSMutableArray results = new NSMutableArray();
log.info(!! databaseContextWillPerformAdaptorOperations: );
log.info(adaptorOps);
log.info(---);
Enumeration enim = adaptorOps.objectEnumerator();
//WOXMLCoder coder = WOXMLCoder.coder();
XStream xstream = new XStream(new DomDriver()); // does not require
XPP3 library
EOEditingContext ec = new EOEditingContext();
EOEntity entityTransaction = EOUtilities.entityNamed(ec,
Transaction.NomEntite);
EOEntity entityOperation = EOUtilities.entityNamed(ec,
Operation.NomEntite);
Object transactionPk = sequenceClefPrimairePourEntite(adChannel,
entityTransaction, Transaction.ClefPk);
Object[] transactionObjs = { Transaction.CodeStatut_Genere, new
NSTimestamp(), Site.clefSiteCourant(), transactionPk };
NSDictionary transactionValues = new NSDictionary(transactionObjs,
transactionKeys);
EOAdaptorOperation transactionAdaptorOp = new
EOAdaptorOperation(entityTransaction);
transactionAdaptorOp.setAdaptorOperator(1);
transactionAdaptorOp.setChangedValues(transactionValues);
results.addObject(transactionAdaptorOp);
while (enim.hasMoreElements()) {
EOAdaptorOperation op = (EOAdaptorOperation)
enim.nextElement();
results.addObject(op);
ERXAdaptorOperationWrapper wrap = new
ERXAdaptorOperationWrapper(op);
String xml = xstream.toXML(wrap);
log.info(xml);
Object operationPk = sequenceClefPrimairePourEntite(adChannel,
entityOperation, Operation.ClefPk);
Object[] objs = { Operation.CodeStatut_Genere, op.entity().name(),
xml, operationPk, transactionPk };
NSDictionary values = new NSDictionary(objs,
operationKeys);
EOAdaptorOperation adaptorOp = new
EOAdaptorOperation(entityOperation);
adaptorOp.setAdaptorOperator(1);
adaptorOp.setChangedValues(values);
results.addObject(adaptorOp);
}
return results;
}
It does work in the sense that operations does get serialized and
saved to the bd. But I never push this pet project further so that I
never got it to transfert and sync over 2 deployement sites. So it
was never really tested, it's more at the state of a prototype
actually more than anything else.
The model is simple, 3 entities : Site, Operation and Transaction
Site -- Transaction
Transaction -- Operations
If you would like to take a look at it, let me know, I can send it
all, it was all done on my spare time for a non-profit organisation.
- jfv
Cheers, Anjo
Am 16.04.2009 um 04:44 schrieb John Ours:
My main concern with trying this with WebObjects would be, as
others have said, trying to sync the persistence layers. Even if
you could get it to work it would be horribly inefficient. In
every system we've ever built like this we've handled the data sync
at the database level through either OTS or custom replication.
Hypothetically this approach should work with WO...the clients
always write locally and the sync is database-to-database whenever
a connection becomes available.
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Re: Multiple instances of WOA's deployed as WAR's
We have been deploying our apps out as servlets for a few years now with many of our larger customers having large numbers of instances. Here is some things we have learned over that time: * Deploying as servlets means that you can only have 1 instance per servlet container. In order to scale you need to deploy multiple servlet containers. In our case for large servers with plenty of RAM and CPU we may run 2 or 3 Tomcat servers on the same box all on different ports. We use the JK adaptor or other external load balancers to balance across all running Tomcat instances. * As long as each WO app being deployed on a single Tomcat server has a different context name, you can deploy multiple WO apps on a single Tomcat server. For example, we deploy a management console, a web service app, and a WO based JSP tag library app in the same servlet container. * Be aware that all WO apps running in the same servlet container share the same RAM. On 32bit Windows platforms that typically is around 1.4G. * Even though Tomcat is multi-threaded, the WO EOF stack is much less so. It is necessary to scale by adding instances of Tomcat and your app. Project Wonder has been a big help in minimizing our locking issues in these multi threaded environments * We don¹t/can¹t use JavaMonitor. We use the Java Service Wrapper ( http://wrapper.tanukisoftware.org/doc/english/download.jsp) to launch and monitor our apps. We built a custom page to display the WOStats in our app. * We don¹t use the WO JSP tags to display WOComponents in JSP pages. Seems interesting, but never tried it. * We turned off session persistance in Tomcat. The persisted sessions are basically unusable and only cause problems when our apps get restarted. * We rely on Tomcat clustering if we need it. * You will get errors like: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context when starting up if you do not use a content.xml and turn off JNDI naming. The app still starts up properly and runs fine, but it will throw those errors once per connection. I haven¹t bothered to figure out how to use JNDI with our WO apps. Mainly because we only used a single ObjectStoreCoordinator per instance. * The session time out is set in the WEB-INF/web.xml. The WOServletAdaptor seems to attach itself to the Tomcat Session such that they share the same lifecycle. * The WebObjects classloader is configured in the WEB-INF/web.xml under the WOCLASSPATH context parameter. It is a separate class loader than the ones provided by the Tomcat server. We only put the WO related jars (from the WO runtime and our frameworks and apps) in there. All of the other dependent jars go in the WEB-INF/lib. We don¹t bundle any extra jars inside our frameworks to avoid duplicates. Tomcat provides jars like log4j, etc but we bundle our own so we don¹t have any external dependencies. The newer WO runtime files are delivered as Jars instead of Frameworks we deploy those in the WEB-INF/lib but register them in the WEB-INF/web.xml. Our Project Wonder jars still need to be deployed as Frameworks. * There is no built in load balancing in the WOServletAdaptor like there is in the regular WOAdaptors. The machine name stuff is meaningless. The sessions are sticky based on the JSESSIONID that the Tomcat container provides * We deploy our database drivers in the WEB-INF/lib folder of our WARs. That way we control what drivers are being used. * The WO apps need to run as expanded WARs in order to resolve the variables in the WEB-INF/web.xml (i.e. WEBINFROOT). Not sure why, but I suspect it is because the bootstrapping process needs to see the environment directly. WARs are typically expanded in Tomcat by default. Other containers such as WebLogic do not expand them by default causing issues. The J2EE spec says either way is acceptable but they lean toward not expanding them which causes us issues. * Resource resolution is slightly different between a regular WO app and a WO app deployed as a servlet. The WOContext is different (WOServletContext) as well as WORequest, WOResponse. * The WebObjects servlet is still in the URL i.e. http://myapp.com/MyStore/WebObjects/store.woa. You can use URL rewriting to remove it if you want or I think there is some functionality in Project Wonder to rename it. * We found it easier to pass the session id in the URL in most cases. Hope that helps people. Overall I like deploying WO inside the servlet containers. Customers are very comfortable with servlet containers and have a lot less concern than deploying on a proprietary app server engine. There are some limitations but they are not that bad. It is a whole lot easier deploying a single WAR than it is sending someone a bunch of files and hoping they put them in the right place. Dov Rosenberg On 4/17/09 6:19 AM, David Avendasora webobje...@avendasora.com wrote: On Apr 17, 2009, at 3:26 AM, Tonny Staunsbrink wrote: Hello A recent posting said that war file deployment just works (it's not
Re: JavaXML.framework Question
My guess is that it's because javaxml.jar includes servlet.jar inside of it, and the j2ee rules say this is a nono ... I believe if you look closely at the startup console log, you might see that your j2ee container removes javaxml from your classpath because of that violation? I have a vague recollection of this, at least. JavaXML is pretty evil and really shouldn't exist. You don't actually need it -- it's just a pile of prebuilt jars ... Especially if you're using maven, you should really unroll it and add the individual dependencies instead. ms On Apr 17, 2009, at 12:40 AM, Jake MacMullin wrote: I've encountered this same problem (sans-wonder) when deploying WebObjects applications built as WARs to Tomcat, JBoss (with a Tomcat servlet container) and Glassfish application servers - though not with Jetty. I'd really like to know more about what might be causing this problem and what the solution is. I suspect that it might be due to incompatibilities between versions of java libraries included within the javaxml.jar and different versions of the same libraries provided by the various application servers. I'm currently seeing if I can figure out exactly what is causing this problem as it is a serious issue if we're unable to deploy to JBoss/Tomcat as that's our current server set-up. I first noticed this problem with WO 5.4.x (sans-wonder). Regards, Jake On Wed, Apr 15, 2009 at 2:18 AM, Dov Rosenberg drosenb...@inquira.com wrote: Yes, we have swapped over to Wonder a few months ago. I have run into this prior to Wonder though. Dov On 4/14/09 12:01 PM, David Avendasora webobje...@avendasora.com wrote: Hi Dov, Are you using Wonder with your Tomcat servlet apps? I've run into some classpath weirdness with running the two together. The weirdness I see is different from what you are running into, but maybe they are related... Dave On Apr 14, 2009, at 11:39 AM, Dov Rosenberg wrote: We deploy our apps as servlets in Tomcat. We have been deploying them that way for the past few years. Recently I have been updating our build scripts to steamline them. For some reason even though we include the javaxml.jar (from the JavaXML.framework) in our WEB-INF/ lib folder the Tomcat class loader can’t seem to find classes that I can see in the jar. For example at startup if I don’t include xercesImpl.jar in my WEB-INF/lib along side javaxml.jar I will see the following error java.lang.NoClassDefFoundError: org/apache/xml/serialize/ OutputFormat: org/apache/xml/serialize/OutputFormat That class is in both the xercesImpl and javaxml.jar’s The same seems to apply for the xalan, axis, wsdl, etc classes. Should we be deploying the JavaXML.framework at all? It seems that if we do not the webservices functionality built into WebObjects gets broken. Seems like a waste to deploy all of these duplicate wars. Thanks in advance for any feedback Dov Rosenberg ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/webobjects%40avendasora.com This email sent to webobje...@avendasora.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/jmacmullin%40gmail.com This email sent to jmacmul...@gmail.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/mschrag%40mdimension.com This email sent to msch...@mdimension.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Multiple instances of WOA's deployed as WAR's
looks like a wiki page to me if i ever saw one :) On Apr 17, 2009, at 8:20 AM, Dov Rosenberg wrote: We have been deploying our apps out as servlets for a few years now with many of our larger customers having large numbers of instances. Here is some things we have learned over that time: Deploying as servlets means that you can only have 1 instance per servlet container. In order to scale you need to deploy multiple servlet containers. In our case for large servers with plenty of RAM and CPU we may run 2 or 3 Tomcat servers on the same box all on different ports. We use the JK adaptor or other external load balancers to balance across all running Tomcat instances. As long as each WO app being deployed on a single Tomcat server has a different context name, you can deploy multiple WO apps on a single Tomcat server. For example, we deploy a management console, a web service app, and a WO based JSP tag library app in the same servlet container. Be aware that all WO apps running in the same servlet container share the same RAM. On 32bit Windows platforms that typically is around 1.4G. Even though Tomcat is multi-threaded, the WO EOF stack is much less so. It is necessary to scale by adding instances of Tomcat and your app. Project Wonder has been a big help in minimizing our locking issues in these multi threaded environments We don’t/can’t use JavaMonitor. We use the Java Service Wrapper ( http://wrapper.tanukisoftware.org/doc/english/download.jsp) to launch and monitor our apps. We built a custom page to display the WOStats in our app. We don’t use the WO JSP tags to display WOComponents in JSP pages. Seems interesting, but never tried it. We turned off session persistance in Tomcat. The persisted sessions are basically unusable and only cause problems when our apps get restarted. We rely on Tomcat clustering if we need it. You will get errors like: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context when starting up if you do not use a content.xml and turn off JNDI naming. The app still starts up properly and runs fine, but it will throw those errors once per connection. I haven’t bothered to figure out how to use JNDI with our WO apps. Mainly because we only used a single ObjectStoreCoordinator per instance. The session time out is set in the WEB-INF/web.xml. The WOServletAdaptor seems to attach itself to the Tomcat Session such that they share the same lifecycle. The WebObjects classloader is configured in the WEB-INF/web.xml under the WOCLASSPATH context parameter. It is a separate class loader than the ones provided by the Tomcat server. We only put the WO related jars (from the WO runtime and our frameworks and apps) in there. All of the other dependent jars go in the WEB-INF/lib. We don’t bundle any extra jars inside our frameworks to avoid duplicates. Tomcat provides jars like log4j, etc but we bundle our own so we don’t have any external dependencies. The newer WO runtime files are delivered as Jars instead of Frameworks – we deploy those in the WEB-INF/lib but register them in the WEB-INF/web.xml. Our Project Wonder jars still need to be deployed as Frameworks. There is no built in load balancing in the WOServletAdaptor like there is in the regular WOAdaptors. The machine name stuff is meaningless. The sessions are sticky based on the JSESSIONID that the Tomcat container provides We deploy our database drivers in the WEB-INF/lib folder of our WARs. That way we control what drivers are being used. The WO apps need to run as expanded WARs in order to resolve the variables in the WEB-INF/web.xml (i.e. WEBINFROOT). Not sure why, but I suspect it is because the bootstrapping process needs to see the environment directly. WARs are typically expanded in Tomcat by default. Other containers such as WebLogic do not expand them by default causing issues. The J2EE spec says either way is acceptable but they lean toward not expanding them – which causes us issues. Resource resolution is slightly different between a regular WO app and a WO app deployed as a servlet. The WOContext is different (WOServletContext) as well as WORequest, WOResponse. The WebObjects servlet is still in the URL i.e. http://myapp.com/MyStore/WebObjects/store.woa . You can use URL rewriting to remove it if you want or I think there is some functionality in Project Wonder to rename it. We found it easier to pass the session id in the URL in most cases. Hope that helps people. Overall I like deploying WO inside the servlet containers. Customers are very comfortable with servlet containers and have a lot less concern than deploying on a proprietary app server engine. There are some limitations but they are not that bad. It is a whole lot easier deploying a single WAR than it is sending someone a bunch of files and hoping they put them in the right place. Dov Rosenberg On 4/17/09 6:19 AM,
Re: Multiple instances of WOA's deployed as WAR's
Dov, This is really excellent! Do you mind if I put this up on the Wiki as a general WebObjects with Servlets informational page? With that said, I do have some questions for you about this. See below On Apr 17, 2009, at 8:20 AM, Dov Rosenberg wrote: We have been deploying our apps out as servlets for a few years now with many of our larger customers having large numbers of instances. Here is some things we have learned over that time: Deploying as servlets means that you can only have 1 instance per servlet container. In order to scale you need to deploy multiple servlet containers. In our case for large servers with plenty of RAM and CPU we may run 2 or 3 Tomcat servers on the same box all on different ports. We use the JK adaptor or other external load balancers to balance across all running Tomcat instances. Can you provide some more detail about how to set this up? Is it similar to what Andrew Lindesay has documented on the Wiki already? As long as each WO app being deployed on a single Tomcat server has a different context name, you can deploy multiple WO apps on a single Tomcat server. For example, we deploy a management console, a web service app, and a WO based JSP tag library app in the same servlet container. This is exactly the setup I have. I have 3 distinct WO apps running in one Tomcat 6.0 instance. I run into problems with the classloader trying to load frameworks that only exist in one project into another. I have to include all the frameworks used by all three apps in all three otherwise if the one that loads last doesn't have the frameworks required by one of the previous apps, it will fail. I'm not sure if it is a problem involving Wonder, or if it does it for plain WO apps too. Be aware that all WO apps running in the same servlet container share the same RAM. On 32bit Windows platforms that typically is around 1.4G. Even though Tomcat is multi-threaded, the WO EOF stack is much less so. It is necessary to scale by adding instances of Tomcat and your app. Project Wonder has been a big help in minimizing our locking issues in these multi threaded environments We don’t/can’t use JavaMonitor. We use the Java Service Wrapper ( http://wrapper.tanukisoftware.org/doc/english/download.jsp) to launch and monitor our apps. We built a custom page to display the WOStats in our app. So you use this instead of using the Tomcat Manager application? Not that I've ever gotten it to start and stop individual WO apps anyway. I always have had to restart the whole container. It's a pain in the butt, but not so much of one that I've ever tried to figure out why. We don’t use the WO JSP tags to display WOComponents in JSP pages. Seems interesting, but never tried it. We turned off session persistance in Tomcat. The persisted sessions are basically unusable and only cause problems when our apps get restarted. How do you turn that off. I've never looked for it but it is annoying to get a bunch of errors at boot. We rely on Tomcat clustering if we need it. You will get errors like: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context when starting up if you do not use a content.xml and turn off JNDI naming. The app still starts up properly and runs fine, but it will throw those errors once per connection. I haven’t bothered to figure out how to use JNDI with our WO apps. Mainly because we only used a single ObjectStoreCoordinator per instance. I get these too, but I never used to. The only thing I can think of that changed is that I used to define the connections in the context.xml file. I quit using that file. I don't know if that is what is now causing the error messages, but the timing seems to be coincidental. The session time out is set in the WEB-INF/web.xml. The WOServletAdaptor seems to attach itself to the Tomcat Session such that they share the same lifecycle. Do you let WOLips auto-generate the web.xml file for you? If so, how do you manually control this value? Again, I've never tried, but it's been on my low-priority todo list forever. The WebObjects classloader is configured in the WEB-INF/web.xml under the WOCLASSPATH context parameter. It is a separate class loader than the ones provided by the Tomcat server. We only put the WO related jars (from the WO runtime and our frameworks and apps) in there. All of the other dependent jars go in the WEB-INF/lib. We don’t bundle any extra jars inside our frameworks to avoid duplicates. Tomcat provides jars like log4j, etc but we bundle our own so we don’t have any external dependencies. The newer WO runtime files are delivered as Jars instead of Frameworks – we deploy those in the WEB-INF/lib but register them in the WEB-INF/web.xml. Our Project Wonder jars still need to be deployed as Frameworks. There is no built in load balancing in the WOServletAdaptor like there is in the regular WOAdaptors. The machine
Re: JavaClient offline storage / replication
Am 17.04.2009 um 13:47 schrieb Jean-Francois Veillette: If you would like to take a look at it, let me know, I can send it all, it was all done on my spare time for a non-profit organisation. Me? No thanks :) My original task was to sync 2 sites using - get this - email (No, I couldn't use anything else, it HAD to be email). I ended up with using JMS to halfway maintain queue integrity. It actually worked and because each site only had their own change sets with their own PKs (this is what the host flag in ERXLongPKFactory is for), conflicts were minimal and easy to sort out. But it was still a nightmare and I'm glad they now listened to reason :) Cheers, Anjo ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: wotaskd password
I will give it another try over the next few days and see if maybe it was some other problem I was having. Frank On Apr 16, 2009, at 3:20 PM, Mark Ritchie wrote: On 16-Apr-09, at 2:54 PM, Chuck Hill wrote: You might also be thinking of this (unrelated) section in /System/Library/WebObjects/Adaptors/Apache2.2/apache.conf # To enable the WOAdaptorInfo page with restricted access, # uncomment the next two lines and set the user and password # To access the WOAdaptorInfo page with restricted access, # use a URL like: http://webserver/cgi-bin/WebObjects/WOAdaptorInfo?user+password . # WebObjectsAdminUsername user # WebObjectsAdminPassword password Hey Chuck! That's a good point! Perhaps Frank is mixing them up? Either way, enabling the WOAdaptorInfo page and turning on adaptor logging are vital to tracking down why it's not working! For example, on that solaris problem with Apache2 and Apache2.2, turned out that Apache2.2 required fqdn for the app servers where as Apache2 did not. Weird shit but then there were multiple virtual hosts and external vs internal addresses so were lots of opportunity for confusion. It was resolved by looking at the adaptor logs which clearly show'd the problem. Regards, M. __ Mark Ritchie Cocoa and WebObjects Developer Diamond Lake Consulting Inc. Toronto, Ontario, Canada ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/frank.cobia%40f2technology.com This email sent to frank.co...@f2technology.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: JavaClient offline storage / replication
My original task was to sync 2 sites using - get this - email (No, I couldn't use anything else, it HAD to be email). I ended up with using JMS to halfway maintain queue integrity. It actually worked and because each site only had their own change sets with their own PKs (this is what the host flag in ERXLongPKFactory is for), conflicts were minimal and easy to sort out. But it was still a nightmare and I'm glad they now listened to reason :) Very interesting ! Nice to see someone actually build a solution for this kind of problem ! I'm currious, do you have an automated mail reader that automatically 'import' change set ? does it need manual intervention ? Can you elaborate a little bit, just enough so I get the big picture. - jfv ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: JavaClient offline storage / replication
Am 17.04.2009 um 15:59 schrieb Jean-Francois Veillette: My original task was to sync 2 sites using - get this - email (No, I couldn't use anything else, it HAD to be email). I ended up with using JMS to halfway maintain queue integrity. It actually worked and because each site only had their own change sets with their own PKs (this is what the host flag in ERXLongPKFactory is for), conflicts were minimal and easy to sort out. But it was still a nightmare and I'm glad they now listened to reason :) Very interesting ! Nice to see someone actually build a solution for this kind of problem ! I'm currious, do you have an automated mail reader that automatically 'import' change set ? does it need manual intervention ? Can you elaborate a little bit, just enough so I get the big picture. A bit, as I don't care to remember this in too much detail :) Actually, it looked like I pulled out the JMS as openJMS wasn't too stable to begin with and used my own tiny queue implementation. I had what you had: SyncQueue (name, messages) + SyncMessage (queue, payload, reponse, sequence no) Also as I had images and changes to sync, I had 6 queues: Master: - create one Sender for the images - create one Sender for the master queue - create one Receiver for the client queue Client: - create one Sender for the client queue - create one Receiver for the master queue - create one Receiver for the images EC changes get sent into the outbound queue, then sent as mail. Client reads items (IMAP), if it's out of order, waits until he gets the correct number. There was an interface to resend. Client gets payload, execs items. Last write wins, changes are merged, conflicts are reported. Deleted are ignored. Client write receipt, master reads it and marks the item as done (result as text). The rest I can't remember (except telling them that when push comes to shove, they have to start fresh and the whole thing is a terrible idea to begin with) Cheers, Anjo ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
ERXObjectStoreCoordinator and database channels
Hi, I have application that allows user to make searches over database that can last for few minutes. Using WOLongResponsePage user can see some time counting :D when his query is executed. Query is custom created and fired by EOUtilities.rawRowsForSQL. Problem is, that new user (new session just created) cannot log in even see start page. I've tried some solutions passed here. One that works is to create ERXObjectStoreCoordinator per session. This works, but when I was testing it simulating many users (about 100) database connection pool ends and application still wanted to create new ones. In session constructor I use: ERXObjectStoreCoordinator objectStoreCoordinator = new ERXObjectStoreCoordinator(); EOEditingContext editingContext = ERXEC.newEditingContext(); setDefaultEditingContext(editingContext) If I don't create ERXObjectStoreCoordinator, new user with new session cannot use db during database channel is occupied by searching thread and new db channel is not created. I thought that database connections are created when all from pool are busy, when some are free - session uses them. How to manage such situation, maybe I misunderstand something? I tried to follow the instruction of Miguel Arroz from http://terminalapp.net/dr-optimistic-locking/ but setting er.extensions.ERXObjectStoreCoordinatorPool.maxCoordinators to some value changes nothing. Could you explain me how to use, in simplest case, ERXObjectStoreCoordinatorPool, ERXObjectStoreCoordinator and ERXObjectStoreCoordinatorSynchronizer? I can't figure out how to use them together. Thanks in advance, :D Jarek -- Jaroslaw Barcewicz Software Developer Power Media S.A. http://www.power.com.pl District Court for Wroclaw-Fabryczna KRS: 281947 NIP: PL-898-16-47-572 Capital stock: 640 000 PLN ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
AjaxModalContainer help...
I am attempting to use this wonderful Wonder stuff...
I have a table and I want the user to be able to mark rows as deleted. Actually
they are updating the row and setting the isDeleted boolean to true and saving
the row.
I am trying to use the AjaxModalContainer to show the currently selected row. I
have used the AjaxExample2 as a template for the container. So far the user
can click the delete column and the AjaxModalContainer comes up...
DeleteContact : AjaxModalContainer {
ajax = true;
id = current.companyName;
label = delete;
}
Here is the row/column to delete the record:
webobject name = DeleteContact
wo:AjaxUpdateContainer
wo:form
bDelete Company/b
p
wo:WOString value = $current.companyName size = 30 /
wo:AjaxSubmitButton action = $deleteContact value = Delete
updateContainerID = tableBody /
/p
/wo:form
/wo:AjaxUpdateContainer
/webobject
My problem is that the modal dialog is not dismissing after the user clicks the
delete button. (the current record is indeed marked as deleted. Here is the
java:
public WOActionResults deleteContact() {
NSLog.out.appendln(top of deleteContact +);
dg.setSelectedObject(current);
dg.selectedObject().setIsDeleted(true);
try {
contactEO.saveChanges();
//jobListEO.saveChangesInEditingContext(jobListEO);
} catch (ValidationException e) {
NSLog.out.appendln(ValidationException e = + e.getMessage());
} catch (EOGeneralAdaptorException e) {
NSLog.out.appendln(EOGeneralAdaptorException e = + e.getMessage());
}
contactList = null;
contactList = Contact.fetchNotDeleted(contactEO);
dg.setObjectArray(contactList);
//this.sortByCompany(); //so it has an initial value
current = null;
dg.setSelectedObject(null);
dg.qualifyDisplayGroup();
deleteContactBoolean = false;
return null;
}
Why doesn't this dialog dismiss when you click the submit button
Ted
___
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JavaClient: does the eomodel file need to be included with the client app?
In JavaClient does the eomodel file need to be included with the client app? Or just on the server as usual? John ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ERXObjectStoreCoordinator and database channels
On Apr 17, 2009, at 7:38 AM, Jarosław Barcewicz wrote: Hi, I have application that allows user to make searches over database that can last for few minutes. Using WOLongResponsePage user can see some time counting :D when his query is executed. Query is custom created and fired by EOUtilities.rawRowsForSQL. Problem is, that new user (new session just created) cannot log in even see start page. If you are dispatching requests concurrently, they should at least be able to get to the start page. But that won't be of any benefit. I've tried some solutions passed here. One that works is to create ERXObjectStoreCoordinator per session. This works, but when I was testing it simulating many users (about 100) database connection pool ends and application still wanted to create new ones. In session constructor I use: ERXObjectStoreCoordinator objectStoreCoordinator = new ERXObjectStoreCoordinator(); EOEditingContext editingContext = ERXEC.newEditingContext(); setDefaultEditingContext(editingContext) Yes, that can have bad results with memory usage and database connection usage. If I don't create ERXObjectStoreCoordinator, new user with new session cannot use db during database channel is occupied by searching thread and new db channel is not created. I thought that database connections are created when all from pool are busy, when some are free - session uses them. How to manage such situation, maybe I misunderstand something? The above code automatically creates new ones. You will probably be better off creating a pool for the long running searches and leave the normal session processing untouched. I tried to follow the instruction of Miguel Arroz from http://terminalapp.net/dr-optimistic-locking/ but setting er.extensions.ERXObjectStoreCoordinatorPool.maxCoordinators to some value changes nothing. Does you Application extend ERXApplication and Session extend ERXSession? Could you explain me how to use, in simplest case, ERXObjectStoreCoordinatorPool, ERXObjectStoreCoordinator and ERXObjectStoreCoordinatorSynchronizer? I can't figure out how to use them together. I don't use those, but managing a simple pool yourself for the long running searches might be easier. Even if you use ERXObjectStoreCoordinatorPool, you are still going to want a new EOF stack for the long searches. You should probably concentrate on that problem first. Chuck Thanks in advance, :D Jarek -- Jaroslaw Barcewicz Software Developer Power Media S.A. http://www.power.com.pl District Court for Wroclaw-Fabryczna KRS: 281947 NIP: PL-898-16-47-572 Capital stock: 640 000 PLN ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/chill%40global-village.net This email sent to ch...@global-village.net -- Chuck Hill Senior Consultant / VP Development Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems. http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
EOSQLQualifier replacement
Hi, We are using a CLOB to store some data and I need to search on it using the Oracle contains operation, but we also have several other fields which are used to qualify the search. I am already using EO Qualifiers to perform the search on the other parameters, but now I see that I need something like EOSQLQualifier to handle the CLOB. However, that class is deprecated, and the alternatives listed don't seem to be ideal since that would require me to rewrite the entire qualification using raw SQL. I would like to preserve the my current qualifier architecture. Any suggestions? thanks, tom ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Help me choose topics for WOWODC'09
I am considering a few topics (thinking to only do one) for WOWODC'09 in San Fran this June. I'd appreciate some feedback on which ones are of the widest interest. 1. Testing Someone else is going to be doing a session on testing covering TDD, Mocks, Example Objects, Acceptance/Integration/Unit tests, Demo of building an application with TDD. Is there enough interest in a second session? I'd plan to cover: - using TestNG for unit testing (focus on the mechanics of using TestNG vs JUnit) - functional testing with Selenium without using ERSelenium (focusing more on the functional side than on the developer driven side, how to work with the business folks to create functional and acceptance tests) - writing and using extensions to SeleniumIDE and SeleniumCore - generating and interpreting test coverage reports from EMMA - using JMeter to load test WO apps 2. EOF from Form Submission to Save Complete A detailed look at what happens from when a form value comes in at takeValuesFromRequest, through validation, sending the SQL to the database, handling returned exceptions, and propagating change notifications. This might be a really evil one to prepare for if I go into full detail. 3. Leveraging EOF Validation and WO Components - extending EOF's validation (GVC, Wonder, Validity approaches) - dealing with an EOGeneralAdaptorException in a user friendly way - getting pages and components to manage recording and displaying validation messages without you needing to get involved (aka WOComponent 2.0) Other requests will be entertained. :-) Chuck -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
WOWODC'09 - Bring out your puzzlers!
There is some interest in a reprise of last years entertaining WO Puzzlers session: http://www.wocommunity.org/wowodc08/sessions/wopuzzlers.html The problem is that I don't have enough of them noted down. If you have some odd WO related situations that you encountered, and you are willing to share, send them my way. Coding, deployment, testing, etc. - all are welcome as long as they are puzzling. Thanks! Chuck P.S. Don't forget to register soon! -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Help me choose topics for WOWODC'09
On 17-Apr-09, at 10:43 AM, Chuck Hill wrote: 3. Leveraging EOF Validation and WO Components - extending EOF's validation (GVC, Wonder, Validity approaches) - dealing with an EOGeneralAdaptorException in a user friendly way - getting pages and components to manage recording and displaying validation messages without you needing to get involved (aka WOComponent 2.0) +1 ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Help me choose topics for WOWODC'09
Hi! On 2009/04/17, at 18:43, Chuck Hill wrote: 2. EOF from Form Submission to Save Complete A detailed look at what happens from when a form value comes in at takeValuesFromRequest, through validation, sending the SQL to the database, handling returned exceptions, and propagating change notifications. This might be a really evil one to prepare for if I go into full detail. I vote for 2! ;) Yours Miguel Arroz ... http://www.survs.com smime.p7s Description: S/MIME cryptographic signature ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: EOSQLQualifier replacement
On Apr 17, 2009, at 10:27 AM, Tom Pelaia wrote: Hi, We are using a CLOB to store some data and I need to search on it using the Oracle contains operation, but we also have several other fields which are used to qualify the search. I am already using EO Qualifiers to perform the search on the other parameters, but now I see that I need something like EOSQLQualifier to handle the CLOB. However, that class is deprecated, and the alternatives listed don't seem to be ideal since that would require me to rewrite the entire qualification using raw SQL. I would like to preserve the my current qualifier architecture. Any suggestions? The right way to do this would be to make a custom qualifier that generates the SQL needed. Wonder has some examples. Writing them can be challenging due to the lack of documentation and examples with the why documented. But then you can make qualifiers like: EOQualifier qual = new OracleContainsQualifier(clobAttribute, some text); Chuck -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: EOSQLQualifier replacement
Hi Chuck, Thanks for the info. I will look into Wonder for an example. It seemed to me that an Oracle Plugin inner class was handling the SQL generation. As you mentioned, the documentation on how to create a EOQualifier subclass is weak. thanks, tom On Apr 17, 2009, at 1:56 PM, Chuck Hill wrote: On Apr 17, 2009, at 10:27 AM, Tom Pelaia wrote: Hi, We are using a CLOB to store some data and I need to search on it using the Oracle contains operation, but we also have several other fields which are used to qualify the search. I am already using EO Qualifiers to perform the search on the other parameters, but now I see that I need something like EOSQLQualifier to handle the CLOB. However, that class is deprecated, and the alternatives listed don't seem to be ideal since that would require me to rewrite the entire qualification using raw SQL. I would like to preserve the my current qualifier architecture. Any suggestions? The right way to do this would be to make a custom qualifier that generates the SQL needed. Wonder has some examples. Writing them can be challenging due to the lack of documentation and examples with the why documented. But then you can make qualifiers like: EOQualifier qual = new OracleContainsQualifier(clobAttribute, some text); Chuck -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: [Wonder-disc] Batch deletions
I did something like that once... Not sure I can share the code... I
don't own it... :-(
But I implemented it as follows:
BatchEditor batchEditor = new BatchEditor(anEditingContext);
// modify your EOs here
...
/// then save your editing context
anEditingContext.saveChanges();
The BatchEditor function as a delegate of the EOAdaptorContext objects
registered for the eomodels. Then by combining adaptor operations for
updates and deletes into a single operations. For update operations
as long as the entity and the changes are the same, the operations can
be combined by ORing their qualifiers into a single operation. For
delete operations, as long as the entity is the same the operations
can be combined by ORing their qualifiers together.
The BatchEditor is a one time use only. It removes itself as a
delegate once it accomplishes its function or once it's garbash
collected.
The BatchEditor implements the delegate method:
public NSArray
adaptorChannelWillPerformOperations(EOAdaptorChannel channel, NSArray
operations) {
It then iterates over the EOAdaptorOperation objects in the operations
NSArray.
For example for each operation.adaptorOperator() that is equal to
EODatabaseOperation.AdaptorDeleteOperator I look at the
operation.entity(). I keep a dictionary where the keys are entity
names and the values are NSMutableArrays of these
EOAdaptorOperations. So for example, if two operations have the same
entity they both end up in the same NSMutableArray in my dictionary,
i.e. groups.objectForKey(Foo) returns an NSMutableArray with the two
EOAdaptorOperation objects that have Foo as their entity.
Then you create a new array for the merged operations. Let's say you
have op1 and op2 which are delete operations for Foo.
You can :
EOQualifier combinedQualifier = ERXQ.or(op1.qualifier(),
op2.qualifier());
op1.setQualifier(combinedQualifier);
then you add op1 to the resulting operations array:
mergedOperations.addObject(op1);
then your adaptorChannelWillPerformOperations() returns an NSArray
with the operations that you were not able to merge (combine).
Then EOF will perform those operations (the ones that you could not
merge)... so what about the merged oeprations. Well those are taken
care of a bit later by the editor by implementing
adaptorChannelDidPerformOperations() delegate method. This gets
called after the operations have been performed and in here we take
care of performing the merged operations:
public Throwable
adaptorChannelDidPerformOperations(EOAdaptorChannel sender, NSArray
operations, Throwable exception) {
...
in here you do iterate over the merged operations array and do this:
sender.performAdaptorOperation(op);
you have to wrap this call to performAdaptorOperation() with a try-
catch because EOF will throw an exception when it sees that more than
one row was updated/deleted. if that's the case you ignore the
exception and continue with the next merged operation. Other
exceptions you do need to re throw them so they are handled at a
higher level.
Anyways, that's the idea and it worked for us.
It would be nice if EOF did this for us, or had the option to turn it
on/off.
I'm amazed by how the hooks into EOF allow you to extend it in ways
like this. This is one way I extended it to combine hundreds of
deletes and updates to EOs into single update/delete statements.
It got complicated though when we ran into limits with ORACLE when
combining a large number of qualifiers into a big OR qualifier.
So the code started relatively simple and then grew when we added
handling for this situation.
On Apr 17, 2009, at 1:06 PM, Dan Grec wrote:
Hey all,
So we're still kicking this idea around, and my brain won't let it
rest.
We're a little afraid of using the ERXEOAccessUtilities apprach as
we really don't want to deal with the object graph being in a funny
state.
So I've been wondering if we can influence the SQL that is
generated when EditingContext.saveChanges() is called.
At that point, all the notifications have been sent out and all of
that stuff.
So when it creates the SQL for deletedObjects, instead of going over
each EO one at a time and making delete from foo where id=bar
could it possibly check to see if there are many EOs of the same
class and making a delete from foo where id in bar,bar2,bar3 type
of dealy-o.
I also understand that it needs to visit each EO one at a time to
call things like EO.willDelete() on them, I'm wondering if it could
do all that, then make the one line of SQL and run it...
I'm going as deep as I can with Jad, but I'm way over my head.
It seems like a pretty nice optimization to me.
Is this possible or am I completely off base?
-Dan
On 16-Apr-09, at 12:08 PM, Chuck Hill wrote:
On Apr 16, 2009, at 6:30 AM, Vaughan Van Der Merwe wrote:
So if we happen to be using
Re: Help me choose topics for WOWODC'09
#1 or #3, but the latter may be more inciteful On Apr 17, 2009, at 10:43 AM, Chuck Hill ch...@global-village.net wrote: I am considering a few topics (thinking to only do one) for WOWODC'09 in San Fran this June. I'd appreciate some feedback on which ones are of the widest interest. 1. Testing Someone else is going to be doing a session on testing covering TDD, Mocks, Example Objects, Acceptance/Integration/Unit tests, Demo of building an application with TDD. Is there enough interest in a second session? I'd plan to cover: - using TestNG for unit testing (focus on the mechanics of using TestNG vs JUnit) - functional testing with Selenium without using ERSelenium (focusing more on the functional side than on the developer driven side, how to work with the business folks to create functional and acceptance tests) - writing and using extensions to SeleniumIDE and SeleniumCore - generating and interpreting test coverage reports from EMMA - using JMeter to load test WO apps 2. EOF from Form Submission to Save Complete A detailed look at what happens from when a form value comes in at takeValuesFromRequest, through validation, sending the SQL to the database, handling returned exceptions, and propagating change notifications. This might be a really evil one to prepare for if I go into full detail. 3. Leveraging EOF Validation and WO Components - extending EOF's validation (GVC, Wonder, Validity approaches) - dealing with an EOGeneralAdaptorException in a user friendly way - getting pages and components to manage recording and displaying validation messages without you needing to get involved (aka WOComponent 2.0) Other requests will be entertained. :-) Chuck -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/jmlittle %40gmail.com This email sent to jmlit...@gmail.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Help me choose topics for WOWODC'09
2 3 are pretty even in my world. On Apr 17, 2009, at 10:43 AM, Chuck Hill wrote: 2. EOF from Form Submission to Save Complete A detailed look at what happens from when a form value comes in at takeValuesFromRequest, through validation, sending the SQL to the database, handling returned exceptions, and propagating change notifications. This might be a really evil one to prepare for if I go into full detail. 3. Leveraging EOF Validation and WO Components - extending EOF's validation (GVC, Wonder, Validity approaches) - dealing with an EOGeneralAdaptorException in a user friendly way - getting pages and components to manage recording and displaying validation messages without you needing to get involved (aka WOComponent 2.0) Tim Kliewer WWBI Software Engineering Apple, Sacramento Operations MS: 204-50 Tel: (916) 399-5101 2911 Laguna Blvd Cell: (916) 717-8748 Elk Grove, CA 95758 E-mail: tklie...@apple.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: EOSQLQualifier replacement
Hi Tom,
As it turns out I did something very similar to this yesterday to
create a soundex qualifier. In my case, I used the Wonder qualifiers
as a guide on how to do it as, like you, I didn't find much in the way
of documentation by Apple.
The first thing you'll want to do is subclass ERXKeyValueQualifier
(Wonder) or EOKeyValueQualifier (non-Wonder) as you'll want to see if
this key contains that string.
You'll want to override the 'evaluatesWithObject' method, which
essentially returns true if a certain object qualifies against this
qualifier. Since you'll want the key's value on the object, use
something like this:
public boolean evaluateWithObject(Object object) {
Object result =
NSKeyValueCodingAdditions.Utility.valueForKeyPath(object, key());
if (result == null)
return false;
return value().toString().contains(result.toString());
}
checking for null values where appropriate, of course.
You can test this out now in unit tests / elsewhere in the application
that uses in-memory filtering and it'll do exactly as you'd expect.
The problem is when you try to use your qualifier in a fetch
specification - when it actually hits the database - you'll get
nothing back because EOF isn't sure how to express your query in SQL,
so you have to tell it how.
So, you'll want to create a subclass of
EOQualifierSQLGeneration._KeyValueQualifierSupport and override this
method:
public String sqlStringForSQLExpression(EOQualifier rawQualifier,
EOSQLExpression sqlExpression)
rawQualifier is your contains qualifier, so feel free to cast it to
that if you need it (you'll need the key() and value() methods!) and
sqlExpression contains some goodies that you'll need a bit later.
What you want this method to return is a qualifying string in SQL -
that is, if your SELECT statement looks like this:
select FIRST_NAME, LAST_NAME from PERSON where PERSON_ID = 1 and AGE
= 19
you're looking to return the PERSON_ID = 1 or AGE = 19 bits. At this
point, EOF has already been awesome and figured out what the table/
field name bit of this is - it'll look like t0.PERSON_ID or
t1.LOCATION_ID or something, so you can get this like this:
NSArray? attributePath =
ERXEOAccessUtilities.attributePathForKeyPath(e.entity(),
yourQualifier.key());
EOAttribute attribute = (EOAttribute) attributePath.lastObject();
String sqlName;
if (attributePath.count() 1)
sqlName = e.sqlStringForAttributePath(attributePath);
else
sqlName = e.sqlStringForAttribute(attribute);
I stole this from Wonder, and I'm not sure if there's a shorter way to
do it, but now you have sqlName and, by using yourQualifier.value(),
you should be able to make your qualifying string without too much
difficulty. I'm not sure how to do this *without*
ERXEOAccessUtilities. Be careful at this level, though, because you
could be vulnerable to SQL injection.
The final little bit you want to do is tell EOF to use your special
SQL generator when using this qualifier. At the top of your
qualifier, add this lovely little bit of code:
static {
EOQualifierSQLGeneration.Support.setSupportForClass(new
YourQualifierSQLGenerationSupport(), YourQualifier.class);
}
Hope this helps.
Bill
Hi Chuck,
Thanks for the info. I will look into Wonder for an example. It
seemed to me that an Oracle Plugin inner class was handling the SQL
generation. As you mentioned, the documentation on how to create a
EOQualifier subclass is weak.
thanks,
tom
--
Bill Gallop
Software Developer
Strata Health Solutions Inc.
Phone: +1 403 261 0855 x2103
Fax: +1 403 265 0650
http://www.stratahealth.com
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Re: JavaClient: does the eomodel file need to be included with the client app?
Just on the server. On Apr 17, 2009, at 12:33, John Huss wrote: In JavaClient does the eomodel file need to be included with the client app? Or just on the server as usual? John ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: JavaClient: does the eomodel file need to be included with the client app?
Just on the server for a normal JC app. The client (like a _good_ client) knows nothing about the M portion MVC. Now, if you're going to do crazy client-side persistence stuff, you'll be figuring it out on your own! :-) Dave On Apr 17, 2009, at 12:33 PM, John Huss wrote: In JavaClient does the eomodel file need to be included with the client app? Or just on the server as usual? John ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/webobjects%40avendasora.com This email sent to webobje...@avendasora.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
WO development on Windows with Eclipse/WOLips
All, WebObjects is definitely an awesome tool. I can say that as for the past four years I have been using WO, my WO efforts and the results the apps generate have caught the attention of a much larger company under whom I am now employed. My question centers around the fact I am required to embrace a government standard of Windows + SQL Server for the WO applications for both deployment and development. Deployment comes later, and with the recent activity on the list I believe I will be ok using Tomcat. But, development has me concerned, and I welcome any advice/guidance in spec-ing a Windows system with Eclipse/WOLips for development in terms of: XP vs Vista - which one is best with Eclipse/WOLips? Any 64bit issues with Vista and Eclipse/WOLips? RAM - I know more is always better but XP has a theoretical limit of 4GB, and I am coming from a Mac Pro with 6GB. So, for those of you currently developing on the other platform, can you offer any guidance or advice? Thanks in advance, David --- David Ress, PhDCEO - Chief Entertainment Officer ISTL, Inc. Beavercreek Ohio, 45434 www.infoscribe.com Phone: (937) 431-8870 ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Help me choose topics for WOWODC'09
+1 On 17/04/2009, at 19.47, David Holt wrote: On 17-Apr-09, at 10:43 AM, Chuck Hill wrote: 3. Leveraging EOF Validation and WO Components - extending EOF's validation (GVC, Wonder, Validity approaches) - dealing with an EOGeneralAdaptorException in a user friendly way - getting pages and components to manage recording and displaying validation messages without you needing to get involved (aka WOComponent 2.0) +1 ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/cail%40frontbase.com This email sent to c...@frontbase.com ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: WO development on Windows with Eclipse/WOLips
On Apr 17, 2009, at 1:53 PM, David Ress wrote: All, WebObjects is definitely an awesome tool. I can say that as for the past four years I have been using WO, my WO efforts and the results the apps generate have caught the attention of a much larger company under whom I am now employed. My question centers around the fact I am required to embrace a government standard of Windows + SQL Server for the WO applications for both deployment and development. Deployment comes later, and with the recent activity on the list I believe I will be ok using Tomcat. Ick! is my first thought. You will probably want my SQL Server plugin: http://www.gvcsitemaker.com/chill/ms_sql_server_eof_plugin You will probably spend some time working around SQL Server features / limitations. But, development has me concerned, and I welcome any advice/guidance in spec-ing a Windows system with Eclipse/WOLips for development in terms of: XP vs Vista - which one is best with Eclipse/WOLips? Any 64bit issues with Vista and Eclipse/WOLips? RAM - I know more is always better but XP has a theoretical limit of 4GB, and I am coming from a Mac Pro with 6GB. I develop with 4GB on OS X. Chuck So, for those of you currently developing on the other platform, can you offer any guidance or advice? Thanks in advance, David --- David Ress, PhDCEO - Chief Entertainment Officer ISTL, Inc. Beavercreek Ohio, 45434 www.infoscribe.com Phone: (937) 431-8870 ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/chill%40global-village.net This email sent to ch...@global-village.net -- Chuck Hill Senior Consultant / VP Development Come to WOWODC'09 in San Fran this June! http://www.wocommunity.org/wowodc09/ ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: WO development on Windows with Eclipse/WOLips
On Apr 17, 2009, at 2:03 PM, Chuck Hill wrote: My question centers around the fact I am required to embrace a government standard of Windows + SQL Server for the WO applications for both deployment and development. Deployment comes later, and with the recent activity on the list I believe I will be ok using Tomcat. Ick! is my first thought. You will probably want my SQL Server plugin: Same reaction here ... government standard seems to always be get the worst you can get and be done with it. RAM - I know more is always better but XP has a theoretical limit of 4GB, and I am coming from a Mac Pro with 6GB. I develop with 4GB on OS X. At the moment I'm developing with 2GB and OS X. Database running on the same box ... cug ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: modeling problem
I would love to see the model. I am having trouble creating posixGroup records. Perhaps because of the objectClass multi-value type? My goal is to create users with email accounts on a mac os x server. Regards /Fredrik 2 apr 2009 kl. 02.20 skrev Mike Schrag: I can send you an EOModel that defines inetOrgPerson and posixGroup if you want ... mapping onto LDAP is kind of weird because it supports multivalues, which makes the EOs kind of weird, but we use it extensively for user/group syncing and it works well. On Apr 1, 2009, at 7:51 PM, Daniel Beatty wrote: Greetings Tim, So far it seems you and I are hitting the same problem. There is one additional question regarding the modeling of InetOrgPerson as defined in the OD scheme. How does it reference the User with groups defined on the OD? For annoying things like authorizing a person to use a resource, it would be nice to let OD do its thing to determine group membership. I would certainly appreciate some insight. Also, it was nice to notice that the InetOrgPerson includes references to User Certificates, which is more useful in determining membership to a particular federation. Later, Dan Beatty, M.S. CS (B.S. EECS) Ph.D. Student Texas Tech University dan.bea...@mac.com http://venus.cs.ttu.edu/~dabeatty On Mar 31, 2009, at 4:33 PM, TW wrote: On Mar 31, 2009, at 10:06 AM, Chuck Hill wrote: On Mar 30, 2009, at 4:29 PM, TW wrote: My goal was to have an entity/class (where InetOrgPerson is super) in a middle framework that can be used to wrap a relationship between ldap user and database employee (each modeled in their own frameworks). So, the way I have it set up there's really no difference between InetOrgPerson and GenericUser except that GenericUser has the relationship to database employee and InetOrgPerson does not. I still wonder if GenericUser should have a relationship to both InetOrgPerson and DatabaseEmployee. With that approach, it sounds like GenericUser would have to have it's own data table separate from the other two? Doesn't it need to anyway for the relationship to DatabaseEmployee? Not really. Time for ascii sheep. This is what I have. LDAPModel ---to build path-- UserModel --to build path DBModel = InetOrgPerson GenericUser - Employee (InetOrgPerson/parent) The only relationship (on the right) uses employee_id. That is in the LDAP information? Yes, InetOrgPerson has employeeNumber. We use FileMaker-based tools I created for adding accounts to OD. They call DSImport to add records to OD as needed and they're set up to push the employee_id into that attribute. Actually, there's a scenario right there that supports your suggestion to have an intermediary GenericUser table since that is essentially the same position the old FileMaker database holds - collection of everyone. This approach makes the ldap side of things the starting point since that is the store that knows what type of user the person is. If ldap authentication is successful, I query for the matching GenericUser which is essentially an ldap person since GenericUser inherits from InetOrgPerson. That sounds like a correct use of inheritance. I think you are going to need a restricting qualifier on InetOrgPerson that is always false. I tried the (1=0) restricting qualifier and EOGenerator did not like it and coughed up an error about being unable to parse the qualifier. Good thought though. Well, I've got a version in my repository the way it is. I'm trying to model it the other way around now and we'll see how that works. Then, I can test for the related employee record. If there, foo, if not, bar - depends on the app. It sounds like your preferred approach would be to create another table for GenericUser making it a database entity instead of inheriting from InetOrgPerson. That could work too. The problem there is then I have two entities, InetOrgPerson and GenericUser that have to have similar attributes, including usertype, email, etc. And, when a new Employee is created, I'd have to force the creation of a GenericUser. It sounds like you are on the right track. I think. I can see advantages each way and it's too bad I'm somewhat at the mercy of the greater campus. Hence the lure of herding goats and sheep, living on wine and cheese. Chuck ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your
