[appengine-java] Re: 1.4 eclipse plugin
I solve my jsp compilation issue by using below steps. 1) Download and install eclipse-java-helios-SR1-win32.zip. 2) Install plugins from http://dl.google.com/eclipse/plugin/3.6;. 3) Download and install java_ee_sdk-6u1-jdk-windows.exe. 4) Create a new and empty app using same project name and package as my old app. 5) Carefully copy all files in src and war from my old app into the new app. 6) Import all external libs from my old app into the new app. 7) Set Properties-Google-App Engine-ORM to server files which need enhancement. 8) Debug and no more Unable to compile class for JSP. On Dec 4, 11:47 am, Jerome jerome.mou...@gmail.com wrote: Sorry, no solution but a very similar issue with Eclipse Helios SR 1: org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 9 in the generated java file org.apache.jasper.runtime.HttpJspBase cannot be resolved to a type An error occurred at line: 10 in the generated java file org.apache.jasper.runtime.JspSourceDependent cannot be resolved to a type An error occurred at line: 12 in the generated java file JspFactory cannot be resolved to a type An error occurred at line: 12 in the generated java file JspFactory cannot be resolved An error occurred at line: 23 in the generated java file javax.el.ExpressionFactory cannot be resolved to a type An error occurred at line: 24 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 31 in the generated java file _el_expressionfactory cannot be resolved An error occurred at line: 31 in the generated java file _jspxFactory cannot be resolved An error occurred at line: 31 in the generated java file The method getServletConfig() is undefined for the type plans_jsp An error occurred at line: 32 in the generated java file _jsp_annotationprocessor cannot be resolved An error occurred at line: 32 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 32 in the generated java file The method getServletConfig() is undefined for the type plans_jsp An error occurred at line: 32 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 38 in the generated java file HttpServletRequest cannot be resolved to a type An error occurred at line: 38 in the generated java file HttpServletResponse cannot be resolved to a type An error occurred at line: 39 in the generated java file ServletException cannot be resolved to a type An error occurred at line: 41 in the generated java file PageContext cannot be resolved to a type An error occurred at line: 42 in the generated java file HttpSession cannot be resolved to a type An error occurred at line: 43 in the generated java file ServletContext cannot be resolved to a type An error occurred at line: 44 in the generated java file ServletConfig cannot be resolved to a type An error occurred at line: 45 in the generated java file JspWriter cannot be resolved to a type An error occurred at line: 47 in the generated java file JspWriter cannot be resolved to a type An error occurred at line: 48 in the generated java file PageContext cannot be resolved to a type An error occurred at line: 53 in the generated java file _jspxFactory cannot be resolved An error occurred at line: 1,315 in the generated java file SkipPageException cannot be resolved to a type An error occurred at line: 1,322 in the generated java file _jspxFactory cannot be resolved Stacktrace: at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java: 92) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java: 330) at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java: 439) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java: 592) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 317) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at com.google.appengine.tools.development.PrivilegedJspServlet.access $101(PrivilegedJspServlet.java:23) at com.google.appengine.tools.development.PrivilegedJspServlet $2.run(PrivilegedJspServlet.java:59) at java.security.AccessController.doPrivileged(Native Method) at com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java: 57) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at
[appengine-java] Re: 1.4 eclipse plugin
I solve my jsp compilation issue by using below steps. 1) Download and install eclipse-java-helios-SR1-win32.zip. 2) Install plugins from http://dl.google.com/eclipse/plugin/3.6;. 3) Download and install java_ee_sdk-6u1-jdk-windows.exe. 4) Create a new and empty app using same project name and package as my old app. 5) Carefully copy all files in src and war from my old app into the new app. 6) Import all external libs from my old app into the new app. 7) Set Properties-Google-App Engine-ORM to server files which need enhancement. 8) Debug and no more Unable to compile class for JSP. On Dec 4, 11:47 am, Jerome jerome.mou...@gmail.com wrote: Sorry, no solution but a very similar issue with Eclipse Helios SR 1: org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 9 in the generated java file org.apache.jasper.runtime.HttpJspBase cannot be resolved to a type An error occurred at line: 10 in the generated java file org.apache.jasper.runtime.JspSourceDependent cannot be resolved to a type An error occurred at line: 12 in the generated java file JspFactory cannot be resolved to a type An error occurred at line: 12 in the generated java file JspFactory cannot be resolved An error occurred at line: 23 in the generated java file javax.el.ExpressionFactory cannot be resolved to a type An error occurred at line: 24 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 31 in the generated java file _el_expressionfactory cannot be resolved An error occurred at line: 31 in the generated java file _jspxFactory cannot be resolved An error occurred at line: 31 in the generated java file The method getServletConfig() is undefined for the type plans_jsp An error occurred at line: 32 in the generated java file _jsp_annotationprocessor cannot be resolved An error occurred at line: 32 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 32 in the generated java file The method getServletConfig() is undefined for the type plans_jsp An error occurred at line: 32 in the generated java file org.apache.AnnotationProcessor cannot be resolved to a type An error occurred at line: 38 in the generated java file HttpServletRequest cannot be resolved to a type An error occurred at line: 38 in the generated java file HttpServletResponse cannot be resolved to a type An error occurred at line: 39 in the generated java file ServletException cannot be resolved to a type An error occurred at line: 41 in the generated java file PageContext cannot be resolved to a type An error occurred at line: 42 in the generated java file HttpSession cannot be resolved to a type An error occurred at line: 43 in the generated java file ServletContext cannot be resolved to a type An error occurred at line: 44 in the generated java file ServletConfig cannot be resolved to a type An error occurred at line: 45 in the generated java file JspWriter cannot be resolved to a type An error occurred at line: 47 in the generated java file JspWriter cannot be resolved to a type An error occurred at line: 48 in the generated java file PageContext cannot be resolved to a type An error occurred at line: 53 in the generated java file _jspxFactory cannot be resolved An error occurred at line: 1,315 in the generated java file SkipPageException cannot be resolved to a type An error occurred at line: 1,322 in the generated java file _jspxFactory cannot be resolved Stacktrace: at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java: 92) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java: 330) at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java: 439) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java: 592) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 317) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at com.google.appengine.tools.development.PrivilegedJspServlet.access $101(PrivilegedJspServlet.java:23) at com.google.appengine.tools.development.PrivilegedJspServlet $2.run(PrivilegedJspServlet.java:59) at java.security.AccessController.doPrivileged(Native Method) at com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java: 57) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at
[appengine-java] Checking admin priviledges using UserService in a cron/task-queue task execution
I am trying to debug some issues with task execution and have a
question.
Background
==
Documentation states that tasks (cron and task queue) are executed by
a system process with admin priviledges.
To protect task execution from unauthorized execution I originally
protected them with a security constraint in the web.xml file. That
seemed to work OK.
Now, for other reasons, I'd like to protect them with code of my own
in a filter.
I have been trying to confirm admin priviledges in the filter, using
code like this:
public boolean isAdmin() {
UserService user = UserServiceFactory.getUserService();
if ( user.isUserLoggedIn() ) {
return user.isUserAdmin();
}
else {
return false;
}
}
and I also tried directly:
return user.isUserAdmin();
without checking for login first.
Problem
===
In both cases this seems to return false, even when when the request
comes from the system to run a task-queue task.
Despite the statement that these requests are run as admin.
Question:
===
Can I use the UserService to check admin permissions when the code is
being run in a request started by the system to serve a cron or task-
queue task?
thanks!
--
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[appengine-java] Re: GWT wrapper for the client side (javascript) Channel API
http://code.google.com/p/gwt-gae-channel/ excellent, thanks! -g. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] DataStore embeds equals signs (=) into saved file
Hi, My GAE application strips attachments from inbound emails and saves them as byte[]. Objectify translates the byte[] to a com.google.appengine.api.datastore.Blob (does not utilize BlobStore). For some files, it embeds equal signs in places where the original document doesn't have any equal signs. I've found that MS documents and HTML are rather tolerant of this behavior, but PDFs tend to get corrupt when this happens. Does anyone know why these equal signs are added in seemingly random places? Any other advice to get around this? Below is an example of the contents of a PDF from the more command. You can see the equal signs from the second representation of the file. Original file (Good): 1 0 obj /CreationDate (D:20101203120005) /Producer (SCS2PDF v1.0 (\251 BeppeCosta, 2005)) /Title (PRINT1) endobj 2 0 obj /Type /Catalog /Pages 3 0 R endobj File Snippet After Saving to DataStore (Bad): 1 0 obj /CreationDate = (D:20101203120005) /Producer (SCS2PDF v1.0 (\251 BeppeCosta, = 2005)) /Title (PRINT1) endobj 2 0 obj /Type = /Catalog /Pages 3 0 R endobj Any thoughts? thanks! MG -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] HttpServletRequest.getLocalPort() returns 0
I'm having the same problem here: http://sss.mysimpatico.com/server?authentication=unregistered What was the thank you for? -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] HttpServletRequest.getLocalPort() returns 0
and btw this happens also with getRemotePort() -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: URLFetch weirdness
No, it was failing fast... I was not even seeing the call in my web service. In any case, it started working correctly again. No change on my part. I wonder where that appspot was deployed... I have other appspots that were not experiencing the issue. On Dec 2, 10:22 pm, Philippe Beaudoin philippe.beaud...@gmail.com wrote: You're not hitting the 10s (or default 5s) timeout of URLFetch by any chance? (Could happen if the service is slower than usual.) On Dec 2, 2:46 pm, hector hrov...@gmail.com wrote: Have you guys noticed any weirdness with URLFetch today? One of my appspots is getting intermittent IOException through the URLFetchService. Most of the time it fails, once in a while it goes through. I've verified the target web service and it is up (and has been up). -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: no async queries on AsyncDatastoreService for 1.4.0?
i finished updating my server to use the AsyncDatastoreService. i also cleaned up my memcache code to batch cache requests. both of these changes allowed me to improve the request time by up to 4x for some requests. from ~80ms to ~20ms. now i can prefetch content for the user with little to no penalty to request latency. in fact, much content will have no latency thanks to prefetching :) the server used to get and set cached objects in memcache for each command in a batch. if i have 4 commands in a batch, that could be up to 8 memcache RPCs as well as the actual work for those commands. that was pretty wasteful. so i updated my server to batch all gets into a getAll, and all puts into a putAll. that made a big difference. the length of each get and put are the same, but now i have no more than two memcache calls no matter how many commands are in a batch. if everything hits the cache, then i don't even need to do a put...the entire request will finish in about 6ms. the server also used the synchronous datastore service. so all i/o was blocking. now it's been updated to use AsyncDatastoreService. the server can kick off all i/o for each command at the beginning of the request and gather up the results when they finish. my queries are still blocking...but that doesn't seem to be much of an impact for now. thanks to the app engine team for delivering this interface :) On Dec 3, 11:52 am, Jeff Schnitzer j...@infohazard.org wrote: Does it take so much time to process your results that it really matters they be done in the optimal order? All that polling code is complicated... unless you're shaving off a lot of real-world time, seems like it's better to just launch all batches and block on the first one. Jeff On Wed, Dec 1, 2010 at 8:44 PM, Luke lvale...@gmail.com wrote: great, thanks for the insight max. i have a client that will batch together multiple requests into one RPC call to my app on GAE. each of these individual requests may have one or more datastore accesses. this may include some prefetch requests. so i want to build a mechanism that will interleave these requests taking advantage of theAsyncDatastoreServicefor minimum request latency. i've gone through my server-side stack and made it asynchronous by wrapping RPC returns in Future objects. then i've created a FutureChain object that takes one or more Future objects as input, and will return one Future object. i then have some code that will poll the ultimate Future objects until all of them have finished. it ends up being a simple multi-threaded emulation where each individual request in a batch gets a thread and each thread gives up control when it makes an Async request. now for the PreparedQuery, because my app knows how many items i want, i should be able to wrap it in a special Future object that will try to pull in that many items when it is polled...but the problem is, i don't know when the batch has come back, so every time i call next(), i risk blocking on I/O when i could be initiating another I/O asynchronously or processing the results of an async I/O. so until there is explicit knowledge of when the I/O for a batch has finished, i may be able to get away with reducing the poll-rate of queries i suppose i could just query for the keys, then i could use an explicit Async method to fetch the entities themselves. if i query for keys, will they be split up in batches? any way to know how many keys will be in one batch? On Nov 29, 11:08 am, Max Ross (Google) maxr+appeng...@google.com wrote: Hi Luke, First the awesome news: As of 1.4.0, many queries are implicitly asynchronous. When you call PreparedQuery.asIterable() or PreparedQuery.asIterator(), we initiate the query in the background and then immediately return. This lets you do work while the first batch of results is being fetched. And, when the first batch has been consumed we immediately request the next batch. If you're performing a significant amount of work with each Entity as you iterate you will probably see a latency win as a result of this. Now the less awesome news: We didn't get around to making the List returned by PreparedQuery.asList() work this same magic, but you can expect this in a future release. Some deeper thoughts: The underlying RPCs between your app and the datastore fetch results in batches. We fetch an initial batch of results, and once that batch has been consumed we fetch the next batch. But, there's nothing in the API that maps to these batches - it's either a List containing the entire result set or an Iterable/Iterator that returns Entities one at a time. An API that provides async access to the individual results returned by an Iterable/Iterator (IteratorFutureEntity) doesn't really make sense since you don't know which call to hasNext() is going to require a new batch to be fetched,
[appengine-java] Re: DataStore embeds equals signs (=) into saved file
Hi, somebody already had a problem similar to yours and found the issue and its solution: http://groups.google.com/group/google-appengine-python/browse_thread/thread/0ac4ab5266fb3781 Hope it helps didier On Dec 4, 9:04 pm, Max 6738...@gmail.com wrote: Hi, My GAE application strips attachments from inbound emails and saves them as byte[]. Objectify translates the byte[] to a com.google.appengine.api.datastore.Blob (does not utilize BlobStore). For some files, it embeds equal signs in places where the original document doesn't have any equal signs. I've found that MS documents and HTML are rather tolerant of this behavior, but PDFs tend to get corrupt when this happens. Does anyone know why these equal signs are added in seemingly random places? Any other advice to get around this? Below is an example of the contents of a PDF from the more command. You can see the equal signs from the second representation of the file. Original file (Good): 1 0 obj /CreationDate (D:20101203120005) /Producer (SCS2PDF v1.0 (\251 BeppeCosta, 2005)) /Title (PRINT1) endobj 2 0 obj /Type /Catalog /Pages 3 0 R endobj File Snippet After Saving to DataStore (Bad): 1 0 obj /CreationDate = (D:20101203120005) /Producer (SCS2PDF v1.0 (\251 BeppeCosta, = 2005)) /Title (PRINT1) endobj 2 0 obj /Type = /Catalog /Pages 3 0 R endobj Any thoughts? thanks! MG -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Authentication Failed
hello all, I developing an application called Cloud based teaching system and its done! I am registering my google app engine app. I am able to get the token but I am not able to generate multiple session tokens, and I am not able to register my app with the google registration key, too. Authentication Failed this is the error message which is given by my eclipse -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Checking admin priviledges using UserService in a cron/task-queue task execution
Hi,
To check if your code is running as a task, you can use the specific
http headers added by GAE: QueueName, TaskName, RetryCount. See
http://code.google.com/appengine/docs/java/taskqueue/overview.html#Task_Request_Headers
If additionally. you made the right security restrictions, you are
pretty safe to assume that you are Admin in a task if those headers
are here.
For the security constraint, see
http://code.google.com/appengine/docs/java/taskqueue/overview.html#Securing_URLs_for_Tasks
It's exactly the same idea for cron jobs: see
http://code.google.com/appengine/docs/java/config/cron.html#Securing_URLs_for_Cron.
So, not a direct answer to your question but a way to reach your goal.
Hope it helps
didier
On Dec 4, 2:38 pm, andrew aute...@gmail.com wrote:
I am trying to debug some issues with task execution and have a
question.
Background
==
Documentation states that tasks (cron and task queue) are executed by
a system process with admin priviledges.
To protect task execution from unauthorized execution I originally
protected them with a security constraint in the web.xml file. That
seemed to work OK.
Now, for other reasons, I'd like to protect them with code of my own
in a filter.
I have been trying to confirm admin priviledges in the filter, using
code like this:
public boolean isAdmin() {
UserService user = UserServiceFactory.getUserService();
if ( user.isUserLoggedIn() ) {
return user.isUserAdmin();
}
else {
return false;
}
}
and I also tried directly:
return user.isUserAdmin();
without checking for login first.
Problem
===
In both cases this seems to return false, even when when the request
comes from the system to run a task-queue task.
Despite the statement that these requests are run as admin.
Question:
===
Can I use the UserService to check admin permissions when the code is
being run in a request started by the system to serve a cron or task-
queue task?
thanks!
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
