/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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*/
package org.jboss.as.clustering.lock;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.util.List;
import java.util.Vector;
import org.jboss.as.clustering.ClusterNode;
import org.jboss.as.clustering.GroupMembershipNotifier;
import org.jboss.as.clustering.GroupRpcDispatcher;
import org.jboss.as.clustering.lock.AbstractClusterLockSupport.RpcTarget;
/**
* Unit test of ExclusiveClusterLockManager
*
* @author Brian Stansberry
*
*/
public class YieldingGloballyExclusiveClusterLockSupportUnitTestCase extends ClusteredLockManagerTestBase<YieldingGloballyExclusiveClusterLockSupport> {
@Override
protected YieldingGloballyExclusiveClusterLockSupport createClusteredLockManager(String serviceHAName, GroupRpcDispatcher rpcDispatcher, GroupMembershipNotifier notifier, LocalLockHandler handler) {
return new YieldingGloballyExclusiveClusterLockSupport(serviceHAName, rpcDispatcher, notifier, handler);
}
public void testBasicRemoteLock() throws Exception {
TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 2);
YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
LocalLockHandler handler = testee.getLocalHandler();
RpcTarget target = testeeSet.target;
ClusterNode caller = testee.getCurrentView().get(0);
assertFalse(node1.equals(caller));
RemoteLockResponse rsp = target.remoteLock("test", caller, 1000);
verify(handler).lockFromCluster("test", caller, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
// Do it again; should still work
rsp = target.remoteLock("test", caller, 1000);
verify(handler).lockFromCluster("test", caller, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
}
public void testContestedRemoteLock() throws Exception {
TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
LocalLockHandler handler = testee.getLocalHandler();
RpcTarget target = testeeSet.target;
ClusterNode caller1 = testee.getCurrentView().get(0);
assertFalse(node1.equals(caller1));
ClusterNode caller2 = testee.getCurrentView().get(2);
assertFalse(node1.equals(caller2));
RemoteLockResponse rsp = target.remoteLock("test", caller1, 1000);
verify(handler).lockFromCluster("test", caller1, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
// A call from a different caller should still work as
// w/ supportLockOnly==false we only reject if WE hold the lock
rsp = target.remoteLock("test", caller2, 1000);
verify(handler).lockFromCluster("test", caller2, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
}
/**
* Test that if a member holds a lock but is then removed from the view, another remote member can obtain the lock.
*
* @throws Exception
*/
public void testDeadMemberCleanupAllowsRemoteLock() throws Exception {
TesteeSet<YieldingGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
YieldingGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
LocalLockHandler handler = testee.getLocalHandler();
RpcTarget target = testeeSet.target;
List<ClusterNode> members = testee.getCurrentView();
ClusterNode caller1 = members.get(0);
assertFalse(node1.equals(caller1));
ClusterNode caller2 = members.get(2);
assertFalse(node1.equals(caller2));
RemoteLockResponse rsp = target.remoteLock("test", caller1, 1000);
verify(handler).lockFromCluster("test", caller1, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
// Change the view
Vector<ClusterNode> dead = new Vector<ClusterNode>();
dead.add(caller1);
Vector<ClusterNode> all = new Vector<ClusterNode>(members);
all.remove(caller1);
testee.membershipChanged(dead, new Vector<ClusterNode>(), all);
// A call from a different caller should work
rsp = target.remoteLock("test", caller2, 1000);
verify(handler).lockFromCluster("test", caller2, 1000);
assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
assertNull(rsp.holder);
}
}