Re: Question about error handling

Mon, 20 Jun 2016 07:29:07 -0700

(1) Ubuntu 16.04 (64 bit, server), Tomcat 7.0.68, Cassandra 2.2.6, Elasticsearch 1.4.4. (2) Here are the curls, with responses. Note that I've set up rights as described in my original mail. I've also put Usergride behind Apache so it listens at port 80.
root@vmu-psulonen2:~# curl -X POST "http://localhost/udwc/brikoleur/token <http://localhost/udwc/brikoleur/token>" -d '{ "grant_type" : "password", "username" : "abogdanov", "password" : "thepassword" }' {"access_token":"YWMtpgdKYDbyEeaD2zHg-adLzwAAAVWSPvYGkxL-sP9RrdRTbAGgQJijcOXcApE","expires_in":604800,"user":{"uuid":"2349d142-317a-11e6-9322-080027cf389a","type":"user","name":"Alexander Bogdanov","created":1465831132919,"modified":1465841524921,"username":"abogdanov","email":"psulo...@gmail.com <mailto:psulo...@gmail.com>","activated":true,"picture":"http://www.gravatar.com/avatar/fd1ebc06694e703c1b0c64215890a865 <http://www.gravatar.com/avatar/fd1ebc06694e703c1b0c64215890a865>","metadata":{"size":608},"repeatPassword":"thepassword"}}root@vmu-psulonen2:~# root@vmu-psulonen2:~# curl --header "Authorization: Bearer YWMtpgdKYDbyEeaD2zHg-adLzwAAAVWSPvYGkxL-sP9RrdRTbAGgQJijcOXcApE" "http://localhost/udwc/brikoleur/users/abogdanov/owns/things/ferrari <http://localhost/udwc/brikoleur/users/abogdanov/owns/things/ferrari>" {"error":"uncaught","timestamp":1466432732273,"duration":0,"error_description":"Internal Server Error","exception":"org.apache.usergrid.rest.exceptions.UncaughtException","error_id":"d87217ed-36f2-11e6-b273-080027cf389a"}root@vmu-psulonen2:~# 

BR, Petteri

On 20/06/16 15:36, Dave wrote:

Thanks Petteri.


I can see that this is caused by a null pointer exception after a 
query is executed, inside Usergrid -- but it is not clear what is 
going on. I should have asked for a couple of other pieces of 
information. This info would be helpful:



* What versions of operating system, Tomcat, Cassandra, ElasticSearch, 
Usergrid are you using?


And this would be very very helpful:


* Provide a curl command (or series of commands) that can reproduce 
the error


Thanks,
Dave




On Fri, Jun 17, 2016 at 1:40 AM Petteri Sulonen 
<petteri.sulo...@avaintec.com <mailto:petteri.sulo...@avaintec.com>> 
wrote:


    Hi --

    Here's a dump of what's in catalina.out for the problem request.

    /Petteri

    04:44:47,649  INFO DB:536 - getColumns returned 9 columns
    04:44:47,651  INFO DB:536 - getColumns returned 9 columns
    04:44:47,653  INFO UsersResource:98 - ServiceResource.addNameParameter
    04:44:47,655  INFO UsersResource:100 - Current segment is me
    04:44:47,669  INFO DB:536 - getColumns returned 9 columns
    04:44:47,673  INFO DB:388 - getColumns cf=Entity_Dictionaries
    key=b8f8f336-30c9-3553-b447-6891f3e1e6bf:permissions
    04:44:47,675  INFO DB:404 - getColumns returned 2 columns
    04:44:47,678  INFO DB:388 - getColumns cf=Entity_Dictionaries
    key=2349d142-317a-11e6-9322-080027cf389a:permissions
    04:44:47,679  INFO DB:404 - getColumns returned 0 columns
    04:44:47,680  INFO DB:388 - getColumns cf=Entity_Dictionaries
    key=2349d142-317a-11e6-9322-080027cf389a:rolenames
    04:44:47,682  INFO DB:404 - getColumns returned 0 columns
    04:44:47,691  INFO DB:388 - getColumns
    cf=Entity_Composite_Dictionaries
    key=834fdec4-2e11-11e6-b255-080027cf389a:orgconfig
    04:44:47,692  INFO DB:404 - getColumns returned 0 columns
    04:44:47,711 ERROR ThrowableMapper:35 - An uncaught exception occurred
    during HTTP invocation
    java.lang.NullPointerException
    at
    
org.apache.usergrid.services.AbstractConnectionsService.getItemByName(AbstractConnectionsService.java:243)
    at
    
org.apache.usergrid.services.AbstractService.invokeItemWithName(AbstractService.java:771)
    at
    
org.apache.usergrid.services.AbstractService.invoke(AbstractService.java:728)
    at
    
org.apache.usergrid.services.AbstractService.invoke(AbstractService.java:645)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:245)
    at
    
org.apache.usergrid.services.ServiceRequest.invokeMultiple(ServiceRequest.java:281)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:248)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:212)
    at
    
org.apache.usergrid.rest.applications.ServiceResource.executeServiceRequest(ServiceResource.java:315)
    at
    
org.apache.usergrid.rest.applications.ServiceResource.executeGet(ServiceResource.java:361)
    at sun.reflect.GeneratedMethodAccessor115.invoke(Unknown Source)
    at
    
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at
    
com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    at
    
com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    at
    
com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    at
    
com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
    at
    
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:927)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:875)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:829)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
    at
    
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
    at
    
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
    at
    
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
    at
    
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    at
    
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
    at
    
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.usergrid.rest.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:92)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
    at
    
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at
    
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at
    
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at
    
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at
    
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
    at
    
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at
    
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at
    org.apache.tomcat.util.net
    
<http://org.apache.tomcat.util.net>.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    at
    
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at
    
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at
    
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
    04:44:47,714 ERROR AbstractExceptionMapper:72 -
    org.apache.usergrid.rest.exceptions.UncaughtException 5XX Uncaught
    Exception (500)
    org.apache.usergrid.rest.exceptions.UncaughtException:
    java.lang.NullPointerException
    at
    
org.apache.usergrid.rest.exceptions.AbstractExceptionMapper.toResponse(AbstractExceptionMapper.java:59)
    at
    
org.apache.usergrid.rest.exceptions.ThrowableMapper.toResponse(ThrowableMapper.java:37)
    at
    
com.sun.jersey.spi.container.ContainerResponse.mapException(ContainerResponse.java:480)
    at
    
com.sun.jersey.spi.container.ContainerResponse.mapMappableContainerException(ContainerResponse.java:417)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1477)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
    at
    
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:927)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:875)
    at
    
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:829)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
    at
    
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
    at
    
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
    at
    
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
    at
    
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
    at
    
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    at
    
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
    at
    
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.usergrid.rest.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:92)
    at
    
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at
    
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at
    
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
    at
    
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at
    
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at
    
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at
    
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at
    
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
    at
    
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at
    
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at
    org.apache.tomcat.util.net
    
<http://org.apache.tomcat.util.net>.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    at
    
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at
    
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at
    
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
    Caused by: java.lang.NullPointerException
    at
    
org.apache.usergrid.services.AbstractConnectionsService.getItemByName(AbstractConnectionsService.java:243)
    at
    
org.apache.usergrid.services.AbstractService.invokeItemWithName(AbstractService.java:771)
    at
    
org.apache.usergrid.services.AbstractService.invoke(AbstractService.java:728)
    at
    
org.apache.usergrid.services.AbstractService.invoke(AbstractService.java:645)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:245)
    at
    
org.apache.usergrid.services.ServiceRequest.invokeMultiple(ServiceRequest.java:281)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:248)
    at
    org.apache.usergrid.services.ServiceRequest.execute(ServiceRequest.java:212)
    at
    
org.apache.usergrid.rest.applications.ServiceResource.executeServiceRequest(ServiceResource.java:315)
    at
    
org.apache.usergrid.rest.applications.ServiceResource.executeGet(ServiceResource.java:361)
    at sun.reflect.GeneratedMethodAccessor115.invoke(Unknown Source)
    at
    
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at
    
com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    at
    
com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    at
    
com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    at
    
com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:137)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    at
    
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at
    
com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
    at
    
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
    ... 38 more
    04:44:47,717 ERROR AbstractExceptionMapper:106 - Server Error (500):
    
{"error":"uncaught","timestamp":1465872287717,"duration":0,"error_description":"Internal
    Server
    
Error","exception":"org.apache.usergrid.rest.exceptions.UncaughtException","error_id":"f5752c99-31d9-11e6-b858-080027cf389a"}




    On 16/06/16 22:43, Dave wrote:
    > Hi Petteri,
    >
    > That's definitely a bug; Usergrid should never return HTTP 500
    > internal server error unless Cassandra or ElasticSearch is
    > inaccessible. Is there a stack trace that goes along with that
    error?
    >
    > Dave
    >
    >
    > On Tue, Jun 14, 2016 at 10:38 AM Petteri Sulonen
    > <petteri.sulo...@avaintec.com
    <mailto:petteri.sulo...@avaintec.com>
    <mailto:petteri.sulo...@avaintec.com
    <mailto:petteri.sulo...@avaintec.com>>>
    > wrote:
    >
    >     Hi, everybody --
    >
    >     I'm evaluating Usergrid for our cloud services, and am
    starting to
    >     come
    >     to grips with it. I have a question about error handling.
    >
    >     I've noticed that the errors Usergrid returns seem somewhat
    >     inconsistent. For example, when attempting to GET an entity that
    >     doesn't
    >     exist directly from the collection (omitting org and app
    from path for
    >     clarity):
    >
    >     GET /things/ferrari
    >
    >     will return an error "entity_not_found", but attempting to
    GET the
    >     same
    >     entity through a connection where I "own" the entity:
    >
    >     GET /users/me/owns/things/ferrari
    >
    >     will return an "uncaught" error, with error_description
    "Internal
    >     Server
    >     Error."
    >
    >     Is this intentional? I was expecting to get an
    "entity_not_found"
    >     error
    >     in both cases, as I think this would be a pretty common
    situation to
    >     have in a system where entities are created and deleted
    dynamically.
    >
    >     (If /things/ferrari actually exists and I own it, both queries
    >     return it
    >     as expected, so that's cool.)
    >
    >     If I've understood the design intent behind Usergrid
    correctly, these
    >     connections are extremely important because I can map
    permissions to
    >     them. Therefore it's not always possible to access objects
    directly
    >     under the collection, as the user may only have permission
    to access
    >     objects through a connection (e.g. "owns"). I like this
    scheme a lot,
    >     it's simple, intuitive, yet powerful.
    >
    >     If I've misunderstood something, I would greatly appreciate
    being set
    >     straight.
    >
    >     Thanks in advance,
    >
    >     Petteri
    >
    >








Attachment:
smime.p7s

Description: S/MIME Cryptographic Signature






















					Reply via email to