Hello folks,
I am writing an application using AppEngine 1.5.1, GWT 2.3, Maven 3
and Objectify 3.0 for the data persistence.
I want to be able to start my local AppEngine dev server with some
previous data
So i wrote a small script that generate me a local_db.bin file using
the Appengine's LocalServiceTestHelper class.
Everything works fine, after running the script, i get the "Time to
persist:...ms" log, and the file is effectively created
and seems to contain the data i have put in it.
Then, i place it in the folder "src/main/webapp/WEB-INF/appengine-
generated" of my project,
so that maven automatically copies it to the "WEB-INF/appengine-
generated" directory of my WAR folder: which happened successfully.
I have added the following instruction to the maven-gae-plugin
configuration in my pom.xml:
<jvmFlags>
<jvmFlag>-Ddatastore.backing_store=${project.basedir}/$
{target.dir}/WEB-INF/appengine-generated/local_db.bin</jvmFlag>
</jvmFlags>
to prevent the application from creating a new "local_db.bin" file
everytime it starts, but instead uses the one i have specified.
But when running it with the "mvn gae:run" command, after the jetty
server starts, i getting the following error when requesting the db
the first time:
" Failed to load from the backing store, MY_APP_FOLDER\target\dev\WEB-
INF\appengine-generated\local_db.bin
java.io.StreamCorruptedException: invalid stream header: EFBFBDEF"
Here is the complete log:
INFO: The server is running at http://localhost:8080/
8 juil. 2011 12:18:17
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext
disableTransportGuarantee
INFO: Ignoring <transport-guarantee> for /* as the SDK does not
support HTTPS. It will still be used when you upload your
application.
8 juil. 2011 12:18:18
com.google.appengine.api.datastore.dev.LocalDatastoreService load
INFO: Failed to load from the backing store, MY_APP_FOLDER\target\dev
\WEB-INF\appengine-generated\local_db.bin
java.io.StreamCorruptedException: invalid stream header: EFBFBDEF
at
java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:782)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:
279)
at
com.google.appengine.api.datastore.dev.LocalDatastoreService.load(LocalDatastoreService.java:
1407)
at
com.google.appengine.api.datastore.dev.LocalDatastoreService.start_(LocalDatastoreService.java:
427)
at
com.google.appengine.api.datastore.dev.LocalDatastoreService.access
$300(LocalDatastoreService.java:122)
at com.google.appengine.api.datastore.dev.LocalDatastoreService
$1.run(LocalDatastoreService.java:420)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.api.datastore.dev.LocalDatastoreService.start(LocalDatastoreService.java:
418)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.startServices(ApiProxyLocalImpl.java:
562)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.access
$700(ApiProxyLocalImpl.java:46)
at com.google.appengine.tools.development.ApiProxyLocalImpl
$2.run(ApiProxyLocalImpl.java:544)
at com.google.appengine.tools.development.ApiProxyLocalImpl
$2.run(ApiProxyLocalImpl.java:542)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.getService(ApiProxyLocalImpl.java:
541)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.resolveDeadline(ApiProxyLocalImpl.java:
214)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.doAsyncCall(ApiProxyLocalImpl.java:
195)
at
com.google.appengine.tools.development.ApiProxyLocalImpl.makeAsyncCall(ApiProxyLocalImpl.java:
155)
...
Any idea?
Thanks in advance for your help!
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