package org.infinispan.test;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.infinispan.Cache;
import org.infinispan.manager.CacheContainer;
import org.infinispan.manager.EmbeddedCacheManager;
import org.infinispan.notifications.Listener;
import org.infinispan.notifications.cachemanagerlistener.annotation.ViewChanged;
import org.infinispan.notifications.cachemanagerlistener.event.ViewChangedEvent;
/**
* Listens for view changes. Note that you do NOT have to register this listener; it does so automatically when
* constructed.
*/
@Listener
public class ViewChangeListener {
CacheContainer cm;
final CountDownLatch latch = new CountDownLatch(1);
public ViewChangeListener(Cache c) {
this(c.getCacheManager());
}
public ViewChangeListener(EmbeddedCacheManager cm) {
this.cm = cm;
cm.addListener(this);
}
@ViewChanged
public void onViewChange(ViewChangedEvent e) {
latch.countDown();
}
/**
* Blocks for a certain amount of time until a view change is received. Note that this class will start listening
* for the view change the moment it is constructed.
*
* @param time time to wait
* @param unit time unit
*/
public void waitForViewChange(long time, TimeUnit unit) throws InterruptedException {
if (!latch.await(time, unit)) assert false : "View change not seen after " + time + " " + unit;
}
}