Re: [appengine-java] Re: how to get session id under a Class which doesn't extend HttpServlet?
I tried following code, getting null all the time.
public static HttpSession getSession(){
return new ThreadLocalHttpServletRequest().get().getSession();
}
2010/1/9 Elias Mårtenson loke...@gmail.com
On 9 Jan, 01:27, Prashant Gupta nextprash...@gmail.com wrote:
I am trying to implement my own user management system, for that I need
some
way to make session id available to all classes independent of whether it
extends HttpServlet or not. I know there is some way to do that but I am
not
able to find it. Any kind of help would be appreciated.
One way to do it is to use a servlet filter to make the user
information available through a ThreadLocal instance. That way you can
have a single static method that returns the user wherever you are.
--
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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com
.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
--
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] Re: custom vs. generated keys / storage?
You have a mistaken understanding of what a Key is. Both values displayed on the Datastore Viewer (aghtb2JjYS1zdHIOCxIHQ2hlY2tpbhjiQww and YourEntityKind: id=12345) are merely alternative visual representations. The actual value stored in BigTable is a binary representation of this data. It may or may not be more compact than either of these two visual representations, but you can be assured that there is only one stored version of it (not counting foreign key references or replication, of course). I don't work for Google, but I watched the Google I/O video on BigTable. You should too. Jeff On Fri, Jan 8, 2010 at 11:07 PM, phraktle phrak...@gmail.com wrote: could someone from Google weigh in on this? thanks, Viktor On Jan 6, 12:43 pm, phraktle phrak...@gmail.com wrote: Hi, I'm using the low-level DS API, thus short names for kinds, etc, and my keys are already quite compact. The encoded version is in fact significantly longer than my ownkey. So it would optimal, if DS did not try to second-guess and bloat my PKs. How do you know that DS doesn't actually store both versions? Do you know how to decode the DSkey? Regards, Viktor On Jan 5, 5:54 am, jd jdpatter...@gmail.com wrote: The encoded EntityKey is a representation that includes yourkey name, entity kind, ancestors and app id - encoded into a form that is safe to use in urls etc. Keeping your keys small and kinds small (i.e. using short class names) will reduce storage space of keys in the DS. In Twig (i.e. not JDO) you can keep the names of your classes as you like and then override typetoKind(Type) to return abbreviated names. I found that this saves a significant amount of space in my app that has many relations between entities. http://code.google.com/p/twig-persist/ On Jan 4, 5:01 pm, phraktle phrak...@gmail.com wrote: Hi, I'm generating my own entity keys, with new Entity(Foo, myId). I noticed that in the DataStore viewer, these entities still seem to have a defaultkey: Decoded entitykey: Foo: name=myId Entitykey: ahFzY2FyYWJyZWNvbW1lbmRlcnJACxIVUHJvZHVjdFJlY29tbWVuZGF0aW9uIiU1OTg1MEMzMzM wOUZGRjV8MjAxMDAxMDQwMTAzNTN8cHJvZF8wDA So the Entitykey here still seems to be generated by GAE. Why is this needed? I do have a primarykeyalready. So does it get stored as simply another indexed column? Does this impact storage space too? I don't need the GAE entitykeyat all, and would prefer not having to pay for its storage either :) Thanks, Viktor -- 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. -- 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] Where is jsp translation to servlet code stored
When I upload a jsp to appengine with Ecllipse, my understanding is that the translation from jsp to servlet happens in Eclipse and only the compiled code is uploaded to appengine. Is this correct? Where can I view the translated servlet file? Thanks Dave -- 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] Where is jsp translation to servlet code stored
On Sat, Jan 9, 2010 at 19:15, powell...@gmail.com powell...@gmail.com wrote: When I upload a jsp to appengine with Ecllipse, my understanding is that the translation from jsp to servlet happens in Eclipse and only the compiled code is uploaded to appengine. Is this correct? Where can I view the translated servlet file? Thanks Dave $TMPDIR or /tmp on POSIX systems. I'm guess windoze has some sort of similar directories? -- Joe -- Two things that are infinite, the universe and my stupidity, and I'm not sure about the universe. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] After how much time of no traffic does GAE shut-down the instance
Hi, I've noticed that the same request that takes in average 2 seconds could take more then 20 seconds after around 10 minutes that the application is idle (no requests are received). I assume that after ~10 minutes of no requests, the GAE shuts-down the instance. Is there an official information about this period of time? Is there a way to extend this period of time (besides writing a cron job that runs every minute)? Thanks. Yossi -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] handling com.google.apphosting.api.ApiProxy$RequestTooLargeException: The request to API call datastore_v3.Put() was too large.
no, it doesn't work :( 2010/1/8 Vince Bonfanti vbonfa...@gmail.com Try catching com.google.appengine.api.datastore.DatastoreFailureException, as indicated in the docs: http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/datastore/DatastoreService.html#put(com.google.appengine.api.datastore.Entity) Vince On Thu, Jan 7, 2010 at 11:25 PM, Prashant Gupta nextprash...@gmail.comwrote: hi, com.google.apphosting.api.ApiProxy$RequestTooLargeException: The request to API call datastore_v3.Put() was too large. was thrown while saving an entity to datastore. I want to handle this exception but I am not getting which exception to catch. Please help me out... 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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] TaskQueue 10s limit? really?
Python supports asynchronous URLFetch, but Java doesn't. So if we need to do any asynchronous URLFetching, our only option is to use the TaskQueue, right? Well, I always thought our apps had 30 seconds to complete their business. Since URLFetch calls can take up to 10 seconds to complete, 30 seconds is more than enough. So I wrote an asynchronous_urlfetch function which simply used the TaskQueue to post a URL to a webhook which called URLFetch. Not as good as the Python way, but it should work just fine. But it doesn't! My logs are full of 500 ... Request was aborted after waiting too long to attempt to service your request. for the aforementioned webhook. Aparently, rather than giving the normal 30 seconds, App Engine is killing my TaskQueues after only 10! So if my URLFetch takes 10 seconds, the entire webhook dies! Am I interpreting this right? Are TaskQueues really getting killed after 10 rather than 30 seconds? If so, could we please get this rectified? And, really, time spent waiting on URLFetch should not count against us, anyway! That's outside of our control and is certainly NOT indicative of problems with our apps. -- 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: After how much time of no traffic does GAE shut-down the instance
In my testing, apps which are hit every 2 minutes need to boot every time (costing beacoup CPU cycles), whereas apps hit every 1 minute stay loaded. This limit seems to have changed over time. When I started using appengine several months ago, it would wait ten minutes before subjecting you to the unload/reload penalty. I would gladly send google a stick of RAM in the mail if they would just keep my app going! ;-) On Jan 9, 8:16 am, Yossi yossi@gmail.com wrote: Hi, I've noticed that the same request that takes in average 2 seconds could take more then 20 seconds after around 10 minutes that the application is idle (no requests are received). I assume that after ~10 minutes of no requests, the GAE shuts-down the instance. Is there an official information about this period of time? Is there a way to extend this period of time (besides writing a cron job that runs every minute)? Thanks. Yossi -- 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: Increased reliability issues on AppEngine for the past 48h
I am seeing inexplicable datastore timeouts, too. com.google.appengine.api.datastore.DatastoreTimeoutException: Unknown This happens for simple look-ups (checking if any account Kinds exist which correspond to the submitted cookie). It always goes away if I refresh the page. The error is very sporadic. On Jan 8, 12:54 pm, Jerome Mouton jerome.mou...@gmail.com wrote: Hello, Our AppEngine application has been experiencing an increase rate of bogus exceptions for the past 48+ hours. See the attached image for our requests/seconds and errors/seconds for the last 6 hours. We have been seeing the exact same pattern for the past 2 days. This is an app with billing enabled, and we have way (over 10x) below our billing quotas. The only change we can figure out that started at about the same time as this increase rate of error was the usage of the XMPP API being more frequent than before, but the exceptions are not related to the XMPP API calls, they are the one of the following: - com.google.appengine.api.datastore.DatastoreTimeoutException: Unknown on servlets data store JDO queries that are expected to be (and most of the time are) extremely fast; when it fails, the servlet shows times in this area: 4135ms 187cpu_ms 12api_cpu_ms - com.google.apphosting.api.ApiProxy$ApiDeadlineExceededException: The API call datastore_v3.RunQuery() took too long to respond and was cancelled. on servlets data store JDO queries that are expected to be (and most of the time are) extremely fast; when it fails, the servlet shows times in this area: 5464ms 194cpu_ms - Request was aborted after waiting too long to attempt to service your request. Most likely, this indicates that you have reached your simultaneous dynamic request limit. This is almost always due to excessively high latency in your app. Please seehttp://code.google.com/appengine/docs/quotas.htmlfor more details. Is this reliability degradation for the past 48 hours seen by other users? If a Googler needs our appId for review, please drop me an email. Thank you. Jerome 20100108-appengine_issue.png 80KViewDownload -- 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: TaskQueue 10s limit? really?
Just to clarify, here's what I'm interpreting as google killing my TaskQueues after 10 seconds. See where it says 10064ms 0cpu_ms? This was waiting for a URLFetch to timeout after 10 seconds, but it was killed before URLFetch could return. 10 seconds is much less than 30 seconds... 01-09 11:26AM 03.652 /hook/do_ava_check 500 10064ms 0cpu_ms 0kb AppEngine-Google; (+http://code.google.com/appengine) 0.1.0.2 - - [09/Jan/2010:11:26:13 -0800] POST /hook/do_ava_check HTTP/ 1.1 500 0 ... Request was aborted after waiting too long to attempt to service your request. ... If I am interpreting my logs wrong, let me know... On Jan 9, 3:52 pm, Locke locke2...@gmail.com wrote: Python supports asynchronous URLFetch, but Java doesn't. So if we need to do any asynchronous URLFetching, our only option is to use the TaskQueue, right? Well, I always thought our apps had 30 seconds to complete their business. Since URLFetch calls can take up to 10 seconds to complete, 30 seconds is more than enough. So I wrote an asynchronous_urlfetch function which simply used the TaskQueue to post a URL to a webhook which called URLFetch. Not as good as the Python way, but it should work just fine. But it doesn't! My logs are full of 500 ... Request was aborted after waiting too long to attempt to service your request. for the aforementioned webhook. Aparently, rather than giving the normal 30 seconds, App Engine is killing my TaskQueues after only 10! So if my URLFetch takes 10 seconds, the entire webhook dies! Am I interpreting this right? Are TaskQueues really getting killed after 10 rather than 30 seconds? If so, could we please get this rectified? And, really, time spent waiting on URLFetch should not count against us, anyway! That's outside of our control and is certainly NOT indicative of problems with our apps. -- 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] org.datanucleus.store.appengine.MetaDataValidator checkForIllegalChildField
I'm getting a warning for an embedded child: org.datanucleus.store.appengine.MetaDataValidator checkForIllegalChildField: Unable to validate relation com.allurefx.herdspot.server.data.Person.im I understand we get the checkForIllegalChildField error for many-to- one children that have a Long (rather than Key/String) primary key, but what I have is an embedded field that can't have a primary key. What's the reason for this warning, and what's the resolution? -- 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: custom vs. generated keys / storage?
Hi Jeff, Yeah, I get that, I'm just failing to see why this alternative representation is even there and exposed in any way? The keys must be indexed with the representation that I have constructed, as I can perform lexicographical searches on those specific keys. So what's the other representation all about? It seems wasteful to me. So I would still like to understand better, what the mechanics are here... Viktor On Jan 9, 12:11 pm, Jeff Schnitzer j...@infohazard.org wrote: You have a mistaken understanding of what a Key is. Both values displayed on the Datastore Viewer (aghtb2JjYS1zdHIOCxIHQ2hlY2tpbhjiQww and YourEntityKind: id=12345) are merely alternative visual representations. The actual value stored in BigTable is a binary representation of this data. It may or may not be more compact than either of these two visual representations, but you can be assured that there is only one stored version of it (not counting foreign key references or replication, of course). I don't work for Google, but I watched the Google I/O video on BigTable. You should too. Jeff On Fri, Jan 8, 2010 at 11:07 PM, phraktle phrak...@gmail.com wrote: could someone from Google weigh in on this? thanks, Viktor On Jan 6, 12:43 pm, phraktle phrak...@gmail.com wrote: Hi, I'm using the low-level DS API, thus short names for kinds, etc, and my keys are already quite compact. The encoded version is in fact significantly longer than my ownkey. So it would optimal, if DS did not try to second-guess and bloat my PKs. How do you know that DS doesn't actually store both versions? Do you know how to decode the DSkey? Regards, Viktor On Jan 5, 5:54 am, jd jdpatter...@gmail.com wrote: The encoded EntityKey is a representation that includes yourkey name, entity kind, ancestors and app id - encoded into a form that is safe to use in urls etc. Keeping your keys small and kinds small (i.e. using short class names) will reduce storage space of keys in the DS. In Twig (i.e. not JDO) you can keep the names of your classes as you like and then override typetoKind(Type) to return abbreviated names. I found that this saves a significant amount of space in my app that has many relations between entities. http://code.google.com/p/twig-persist/ On Jan 4, 5:01 pm, phraktle phrak...@gmail.com wrote: Hi, I'm generating my own entity keys, with new Entity(Foo, myId). I noticed that in the DataStore viewer, these entities still seem to have a defaultkey: Decoded entitykey: Foo: name=myId Entitykey: ahFzY2FyYWJyZWNvbW1lbmRlcnJACxIVUHJvZHVjdFJlY29tbWVuZGF0aW9uIiU1OTg1MEMzMzM wOUZGRjV8MjAxMDAxMDQwMTAzNTN8cHJvZF8wDA So the Entitykey here still seems to be generated by GAE. Why is this needed? I do have a primarykeyalready. So does it get stored as simply another indexed column? Does this impact storage space too? I don't need the GAE entitykeyat all, and would prefer not having to pay for its storage either :) Thanks, Viktor -- 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 athttp://groups.google.com/group/google-appengine-java?hl=en. -- 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] Re: jsp work directory
Hi, The following links might serve as a reference though it is thought that it differs depending on OS that you are using. http://groups.google.com/group/google-appengine-java/browse_thread/thread/e63281b3e3d1b05/9b12a70f5172c6c1 Please try. thanks. the directory where the jsps are translated into java files and compiled. like in tomcat. What do you mean by work directory? siliconeagle wrote: does anyone know where the jsp work directory is on the dev server? -- 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. -- 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: how to get session id under a Class which doesn't extend HttpServlet?
On 9 Jan, 16:53, Prashant Gupta nextprash...@gmail.com wrote:
I tried following code, getting null all the time.
public static HttpSession getSession(){
return new ThreadLocalHttpServletRequest().get().getSession();
}
You also need to create a filter where you actually put the data in
the TheadLocal. I am just about to go out, so I don't actually have
time to write the code for you. Sorry about that.
Regards,
Elias
--
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.
