[appengine-java] JDO Batch PUT
Hey In an effort to reduce the number of datastore PUTs I am consuming I wish to use the memcache much more frequently. The idea being to store entities in the memcache for n minutes before writing all entities to the datastore and clearing the cache. I have two questions: Is there a way to batch PUT every entity in the cache? I believe makePersistentAll() is not really batch saving but rather saving each individually is it not? Secondly is there a "callback" function you can place on entities as you place them in the memcache? I.e. If I add an entity to the cache (with a 2 minute expiration delta) can I tell AppEngine to save the entity to the datastore when it is evicted? 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-java@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: Which credentials should I put in for Google App Engine BulkLoader at JAVA development server?
Hi, in theory you should be able to enter any credentials, as long as the username is a valid email address. In practice I've never found that this works - I would always get an "Authentication Failed" error. The solution in my case was to run an http proxy such as Charles in the background. Not sure this is entirely the same situation as you however, as your problem seems to be something to do with the SSL configuration - can you switch this off as well perhaps? -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/u8zD8qS-l44J. To post to this group, send email to google-appengine-java@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: .A research: how long will your java app instance start up fully?
2-3 secs with stripes + slim3 On Sep 29, 9:29 pm, Tapir wrote: > ? -- 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-java@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: .A research: how long will your java app instance start up fully?
Between 5s and 10s, about 10s most of the time. Using quite a few libraries, but no spring, struts or other heavy MVC framework. Francois -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/2QG3YyOmbP8J. To post to this group, send email to google-appengine-java@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 Reads
Good Morning, I am working to tune my application to make the most efficient use resources. Over the last several days I have been trying to reduce the number of 'datastore reads' that are needed, but I have been having trouble determining what a datastore read is. My initial assumption was that it was like a write in that each item you read from the datastore was a read, but I have reduced the number of 'rows' of data that I am reading by over half and there wasn't any change in the datastore reads. I am now wondering if a datastore read is more like a fetch from a database where in a single fetch you could be getting 1 or more rows of data. So, do anyone know what a datastore read is or can you point me in the right direction for documentation on this? Thanks, Doug -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/RnvUDZnGnyMJ. To post to this group, send email to google-appengine-java@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] Fwd: HELP PLEASE! Bug!
-- Forwarded message -- From: Bruno Sandivilli Date: 2011/10/1 Subject: HELP PLEASE! Bug! To: google-appeng...@googlegroups.com Hi, i've compiled my project for the first time with the exact spec that i'm compiling now, it's just the second deployment that i'm doing. I'm getting this error: Expecting a stackmap frame at branch target 6 in method in the development server, and: java.lang.UnsupportedClassVersionError: com/myapp/server/GreetingServiceImpl : Unsupported major.minor version 51.0 i'm using the twitter4j lib. 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-java@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] .A research: how long will your java app instance start up fully?
4-5 secs, I'm using gaelyk On Thu, Sep 29, 2011 at 9:29 PM, Tapir wrote: > ? > > -- > 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-java@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. > > -- Omnem crede diem tibi diluxisse supremum. -- 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-java@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] .A research: how long will your java app instance start up fully?
6~7 seconds (vraptor and objcetify) On Sat, Oct 1, 2011 at 11:58 AM, Wilson MacGyver wrote: > 4-5 secs, I'm using gaelyk > > On Thu, Sep 29, 2011 at 9:29 PM, Tapir wrote: > > ? > > > > -- > > 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-java@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. > > > > > > > > -- > Omnem crede diem tibi diluxisse supremum. > > -- > 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-java@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. > > -- Bruno Fuster -- 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-java@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: JDO Batch PUT
To answer one of my questions, apparently makePersistentAll() does indeed batch save entities. One remaining question I have is, calling entrySet() on my cache to get every entity saved in the cache and passing that to makePersistentAll() is fine; however, the api docs state: "If the map is modified while an iteration over the set is in progress the results of the iteration are undefined". My cache is updated very frequently so the map will be modified. So how do you prevent this from happening and persist each entity in the cache to the datastore? Thanks On Oct 1, 11:45 am, mscwd01 wrote: > Hey > > In an effort to reduce the number of datastore PUTs I am consuming I > wish to use the memcache much more frequently. The idea being to store > entities in the memcache for n minutes before writing all entities to > the datastore and clearing the cache. > > I have two questions: > > Is there a way to batch PUT every entity in the cache? I believe > makePersistentAll() is not really batch saving but rather saving each > individually is it not? > > Secondly is there a "callback" function you can place on entities as > you place them in the memcache? I.e. If I add an entity to the cache > (with a 2 minute expiration delta) can I tell AppEngine to save the > entity to the datastore when it is evicted? > > 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-java@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] .A research: how long will your java app instance start up fully?
Switching from JDO to Objectify reduced my startup time from 8s to about 4s -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/R8mL09ddqTQJ. To post to this group, send email to google-appengine-java@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: HELP PLEASE! Bug!
Hi Bruno, I don't think it's related to AppEngine. I've found this after a quick search on Google : "It means that you compiled your classes under a specific JDK, but then try to run them under older version of JDK. So, you can't run classes compiled with JDK 6.0 under JDK 5.0. The same with classes compiled under JDK 7.0 when you try to run them under JDK 6.0." Hoping it will help. Francois -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/R9yXLwV0Dr8J. To post to this group, send email to google-appengine-java@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.
