Handling Hibernate session (LazyInitializationException)

[Anton Komratov]

Hi, I'm using Wicket + Hibernate (without Spring).
In my application I open Hibernate *session* in WebRequestCycle.*
onBeginRequest*() and close it in WebRequestCycle.*onEndRequest*().

But having association (many-to-one mappings between classes) I've got
LazyInitializationException (no Session). I've just set parameter
"*lazy*"=false
in hibernate mapping file to "many-to-one" mappings. And it worked fine -
amount of data stored in memory in this case was not critical.

Since the system is growing furhter, the method with no lazy initialization
is no more suitable. Could you, please, advise me a way to handle hibernate
session to have lazy initialization. (Solution with no Spring is
preferable).

// Best regards, Anton

Error flushing page

[Anton Komratov]

I’m using wicket-1.4.rc4 with Geronimo 2.1.4 (tomcat 6, java ee 5) and
have got the following exception:

2009-09-11 10:10:44,212 ERROR [DiskPageStore] Error flushing page
java.lang.RuntimeException: java.io.FileNotFoundException:
/usr/local/geronimo-tomcat6-javaee5-2.1.4/var/catalina/work/depost/Main-filestore/CDBF71162CAA988157064CA98A5D1CEA/pm-null
(Too many open files)
  at 
org.apache.wicket.protocol.http.pagestore.FileChannelPool.newFileChannel(FileChannelPool.java:103)
  at 
org.apache.wicket.protocol.http.pagestore.FileChannelPool.getFileChannel(FileChannelPool.java:170)
  at 
org.apache.wicket.protocol.http.pagestore.DiskPageStore$SessionEntry.savePage(DiskPageStore.java:241)
  at 
org.apache.wicket.protocol.http.pagestore.DiskPageStore.flushPagesToSaveList(DiskPageStore.java:898)
  at 
org.apache.wicket.protocol.http.pagestore.DiskPageStore$PageSavingThread.run(DiskPageStore.java:970)
  at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.FileNotFoundException:
/usr/local/geronimo-tomcat6-javaee5-2.1.4/var/catalina/work/depost/Main-filestore/CDBF71162CAA988157064CA98A5D1CEA/pm-null
(Too many open files)
  at java.io.RandomAccessFile.open(Native Method)
  at java.io.RandomAccessFile.(RandomAccessFile.java:212)
  at 
org.apache.wicket.protocol.http.pagestore.FileChannelPool.newFileChannel(FileChannelPool.java:98)
  ... 5 more


I did not find solutions in this forum. S-o-s. It happened in production system.

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FeedbackIndicator doesn't work inside RefreshingView

[Anton Komratov]

I'm using RefreshingView to show and edit data. I put MinimumValidator to
the TextField in RefreshingView (in method populateItem()).Also I put
FeedbackIndicator for this TextField in RefreshingView (also in method
populateItem()).

MinimumValidator works fine - I'm getting error messages at the
FeedbackPanel. But FeedbackIndicator doesn't work - no any "red asterics" in
case of invalid value in TextField.
Others FeedbackIndicators at the same pages (for others TextFields outside
of the RefreshingView) work fine.

Any solutions? (I'm using wicket 1.4rc4).

/// Java code fragment:

@Override
*protected void populateItem(final Item item)* {
item.add(new Label("name"));
item.add(new Label("surname"));
item.add(new Label("city.name"));

TextField tfam = new TextField("amount");
tfam.add(new MinimumValidator(1));
item.add(tfam);

*FormComponentFeedbackIndicator amountFlag =
new FormComponentFeedbackIndicator ("amountFlag");*
* **amountFlag.setIndicatorFor(tfam);*
*item.add(amountFlag); * }
///



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