[jboss-user] [JBossCache] - How to, Flush data stored in TreeCache to disk?

[sjeevan]

Hi,

I am using JE BerkleyDB implementation of JBossTreeCache (org.jboss.cache.TreeCache) in my application for storing some information.

A sniipet out of the constructor:


  | public final Fqn CREATED_DATE_FQN;
  | private static final String CREATED_DATE = "CreatedDate";
  | ....
  | 
  | this.cache = new TreeCache();
  | cache.setClusterName(name);
  | cache.setCacheMode("local");
  | cache.setCacheLoaderConfiguration(getSingleCacheLoaderConfig("",
  | 				BdbjeCacheLoader.class.getName(), "location="
  | 						+ f.getAbsolutePath(), false, true, false));
  | cache.startService();
  | cache.put(CREATED_DATE_FQN, CREATED_DATE, new Timestamp(new Date().getTime()));
  | cache.load(name);//Load existing data if any
  | ...
  | cache.startService(); /// required before the cache can be used!
  | ...
  | 
  | 

To store data I use:


  | cache.put(MAX_ID_FQN, MAX_ID, eventId);
  | 

But what I have observed is that the cache is not flushed to disk. 
I have discovered a workaround (but unacceptable for production) is, after every put;


  | cache.put(MAX_ID_FQN, MAX_ID, eventId);
  | // stopService & startSerivice of cache, to flush the data just added to disk
  | cache.stopService();
  | cache.startService();
  | 

I tried commit() after the put 

  | cache.put(MAX_ID_FQN, MAX_ID, eventId);
  | cache.commit(cache.getCurrentTransaction(true)); //commit to disk, but this throws an exception
  | 

but that throws a
java.lang.UnsupportedOperationException::commit() should not be called on TreeCache directly.

Any clues will be appreciated.

~g1
PS: To build I use maven with jboss-cache-1.4.0.SP1.jar, jboss-system-4.0.3.jar, jboss-jmx-4.0.3.jar & jboss-common-4.0.3.jar


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