1 files changed, 119 insertions, 0 deletions
diff --git a/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SubFlushRunner.java b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SubFlushRunner.java
new file mode 100755
index 0000000000..47a7d733dd
--- /dev/null
+++ b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SubFlushRunner.java
@@ -0,0 +1,119 @@
+/*
+ * 
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * 
+ */
+package org.apache.qpid.server.queue;
+
+
+import org.apache.log4j.Logger;
+
+import org.apache.qpid.AMQException;
+import org.apache.qpid.server.logging.actors.CurrentActor;
+import org.apache.qpid.server.subscription.Subscription;
+import org.apache.qpid.transport.TransportException;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+
+class SubFlushRunner implements Runnable
+{
+    private static final Logger _logger = Logger.getLogger(SubFlushRunner.class);
+
+
+    private final Subscription _sub;
+
+    private static int IDLE = 0;
+    private static int SCHEDULED = 1;
+    private static int RUNNING = 2;
+
+
+    private final AtomicInteger _scheduled = new AtomicInteger(IDLE);
+
+
+    private static final long ITERATIONS = SimpleAMQQueue.MAX_ASYNC_DELIVERIES;
+    private final AtomicBoolean _stateChange = new AtomicBoolean();
+
+    public SubFlushRunner(Subscription sub)
+    {
+        _sub = sub;
+    }
+
+    public void run()
+    {
+        if(_scheduled.compareAndSet(SCHEDULED, RUNNING))
+        {
+            boolean complete = false;
+            _stateChange.set(false);
+            try
+            {
+                CurrentActor.set(_sub.getLogActor());
+                complete = getQueue().flushSubscription(_sub, ITERATIONS);
+            }
+            catch (AMQException e)
+            {
+                _logger.error("Exception during asynchronous delivery by " + toString(), e);
+            }
+            catch (final TransportException transe)
+            {
+                final String errorMessage = "Problem during asynchronous delivery by " + toString();
+                if(_logger.isDebugEnabled())
+                {
+                    _logger.debug(errorMessage, transe);
+                }
+                else
+                {
+                    _logger.info(errorMessage + ' ' + transe.getMessage());
+                }
+            }
+            finally
+            {
+                CurrentActor.remove();
+                _scheduled.compareAndSet(RUNNING, IDLE);
+                if ((!complete || _stateChange.compareAndSet(true,false))&& !_sub.isSuspended())
+                {
+                    if(_scheduled.compareAndSet(IDLE,SCHEDULED))
+                    {
+                        getQueue().execute(this);
+                    }
+                }
+            }
+        }
+    }
+
+    private SimpleAMQQueue getQueue()
+    {
+        return (SimpleAMQQueue) _sub.getQueue();
+    }
+
+    public String toString()
+    {
+        return "SubFlushRunner-" + _sub.getLogActor();
+    }
+
+    public void execute(Executor executor)
+    {
+        _stateChange.set(true);
+        if(_scheduled.compareAndSet(IDLE,SCHEDULED))
+        {
+            executor.execute(this);
+        }
+    }
+}