package org.infinispan.loaders.bdbje;
import com.sleepycat.collections.TransactionWorker;
import org.infinispan.loaders.CacheStore;
import org.infinispan.loaders.modifications.Modification;
import org.infinispan.loaders.modifications.Remove;
import org.infinispan.loaders.modifications.Store;
import java.util.List;
/**
* Adapter that allows a list of {@link Modification}s to be performed atomically via {@link
* com.sleepycat.collections.TransactionRunner}.
*
* @author Adrian Cole
* @since 4.0
*/
public class ModificationsTransactionWorker implements TransactionWorker {
private List<? extends Modification> mods;
private CacheStore cs;
/**
* Associates {@link Modification}s that will be applied to the supplied {@link CacheStore}
*
* @param store what to affect
* @param mods actions to take
*/
public ModificationsTransactionWorker(CacheStore store, List<? extends Modification> mods) {
this.cs = store;
this.mods = mods;
}
/**
* {@inheritDoc} This implementation iterates through a list of work represented by {@link Modification} objects and
* executes it against the {@link CacheStore}.<p/> Current commands supported are: <ul> <li>STORE</li> <li>CLEAR</li>
* <li>REMOVE</li> <li>PURGE_EXPIRED</li> </ul>
*/
public void doWork() throws Exception {
for (Modification modification : mods)
switch (modification.getType()) {
case STORE:
Store s = (Store) modification;
cs.store(s.getStoredEntry());
break;
case CLEAR:
cs.clear();
break;
case REMOVE:
Remove r = (Remove) modification;
cs.remove(r.getKey());
break;
case PURGE_EXPIRED:
cs.purgeExpired();
break;
default:
throw new IllegalArgumentException("Unknown modification type " + modification.getType());
}
}
}