Examples of org.jboss.ha.framework.server.lock.NonGloballyExclusiveClusterLockSupport

Package org.jboss.ha.framework.server.lock

Examples of org.jboss.ha.framework.server.lock.NonGloballyExclusiveClusterLockSupport

org.jboss.ha.framework.server.lock.NonGloballyExclusiveClusterLockSupport
Support class for cluster locking scenarios where threads can hold a local lock on a category but not a cluster-wide lock. Multiple nodes can simultaneously hold a local lock on a category, but none can hold a local lock on a category if the cluster-wide lock is held. Cluster-wide lock cannot be acquired while any node holds a local lock.
NOTE: This class does not support "upgrades", i.e. scenarios where a thread acquires the local lock and then while holding the local lock attempts to acquire the cluster-wide lock.
@author Brian Stansberry


   @Override
   protected NonGloballyExclusiveClusterLockSupport createClusteredLockManager(String serviceHAName, 
         HAPartition partition, LocalLockHandler handler)
   {
      return new NonGloballyExclusiveClusterLockSupport(serviceHAName, partition, handler);
   }

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   }
   
   public void testBasicRemoteLock() throws Exception
   { 
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 2);
      NonGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      ClusterNode caller = testee.getCurrentView().get(0);
      assertFalse(node1.equals(caller));
      
      resetToStrict(handler);      
      handler.lockFromCluster("test", caller, 1000);
      replay(handler);

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   }
   
   public void testContestedRemoteLock() throws Exception
   { 
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      NonGloballyExclusiveClusterLockSupport 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));
      
      resetToStrict(handler);        
      handler.lockFromCluster("test", caller1, 1000);    
      replay(handler);

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    * @throws Exception
    */   
   public void testConcurrentRemoteLock() throws Exception
   { 
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      NonGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      final RpcTarget target = testeeSet.target;
      
      ClusterNode caller1 = testee.getCurrentView().get(0);
      assertFalse(node1.equals(caller1));
      
      ClusterNode caller2 = testee.getCurrentView().get(2);
      assertFalse(node1.equals(caller2));


      
      resetToStrict(handler);   
      makeThreadSafe(handler, true);

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   }
   
   public void testRemoteLockFailsAgainstLocalLock() throws Exception
   { 
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 2);
      NonGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      ClusterNode caller1 = testee.getCurrentView().get(0);
      assertFalse(node1.equals(caller1));
      
      resetToStrict(handler);   
      // We throw TimeoutException to indicate "node1" holds the lock
      handler.lockFromCluster("test", caller1, 1000);

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   private void basicClusterLockFailsAgainstLocalLockTest(int viewSize) throws Exception
   { 
      int viewPos = viewSize == 1 ? 0 : 1;
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, viewPos, viewSize);
      NonGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      HAPartition partition = testee.getPartition();
      LocalLockHandler handler = testee.getLocalHandler();
      
      resetToNice(partition);
      resetToStrict(handler);
      
      ArrayList<RemoteLockResponse> rspList = new ArrayList<RemoteLockResponse>();
      for (int i = 0; i < viewSize - 1; i++)
      {
         rspList.add(new RemoteLockResponse(null, RemoteLockResponse.Flag.OK));
      }
      
      expect(partition.callMethodOnCluster(eq("test"), 
                                           eq("remoteLock"), 
                                           eqLockParams(node1, 2000000), 
                                           aryEq(AbstractClusterLockSupport.REMOTE_LOCK_TYPES), 
                                           eq(true))).andReturn(rspList).atLeastOnce();
      
      handler.lockFromCluster(eq("test"), eq(node1), anyLong());
      expectLastCall().andThrow(new TimeoutException(node1)).atLeastOnce();


      
      expect(partition.callMethodOnCluster(eq("test"), 
                                           eq("releaseRemoteLock"), 
                                           aryEq(new Object[]{"test", node1}), 
                                           aryEq(AbstractClusterLockSupport.RELEASE_REMOTE_LOCK_TYPES), 
                                           eq(true))).andReturn(new ArrayList<Object>()).atLeastOnce();
      replay(partition);
      replay(handler);
      
      assertFalse(testee.lock("test", 10));
      
      verify(partition);
      verify(handler);
   }

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    * @throws Exception
    */
   public void testDeadMemberCleanupAllowsRemoteLock() throws Exception
   {      
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      NonGloballyExclusiveClusterLockSupport 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));
      
      resetToStrict(handler);             
      handler.lockFromCluster("test", caller1, 1000); 
      replay(handler);
      
      RemoteLockResponse rsp = target.remoteLock("test", caller1, 1000);
      
      assertEquals(RemoteLockResponse.Flag.OK, rsp.flag);
      assertNull(rsp.holder);
      
      verify(handler);
      
      // Change the view
      Vector<ClusterNode> dead = new Vector<ClusterNode>();
      dead.add(caller1);
      
      Vector<ClusterNode> all = new Vector<ClusterNode>(members);
      all.remove(caller1);
      
      resetToStrict(handler);
      expect(handler.getLockHolder("test")).andReturn(caller1);
      handler.unlockFromCluster("test", caller1);
      replay(handler);
      
      testee.membershipChanged(dead, new Vector<ClusterNode>(), all);
      
      verify(handler);
      
      // A call from a different caller should work 
      resetToStrict(handler);

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    * @throws Exception
    */
   public void testSpuriousLockReleaseIgnored2() throws Exception
   {
      TesteeSet<NonGloballyExclusiveClusterLockSupport> testeeSet = getTesteeSet(node1, 1, 3);
      NonGloballyExclusiveClusterLockSupport testee = testeeSet.impl;
      HAPartition partition = testee.getPartition();
      LocalLockHandler handler = testee.getLocalHandler();
      RpcTarget target = testeeSet.target;
      
      ClusterNode caller1 = testee.getCurrentView().get(0);
      ClusterNode caller2 = testee.getCurrentView().get(2);
      
      resetToStrict(partition);
      resetToStrict(handler);
      
      handler.lockFromCluster(eq("test"), eq(caller1), anyLong());

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