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Diffstat (limited to 'java/common/src/main/java/org/apache/qpid/pool/Job.java')
-rw-r--r-- | java/common/src/main/java/org/apache/qpid/pool/Job.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/java/common/src/main/java/org/apache/qpid/pool/Job.java b/java/common/src/main/java/org/apache/qpid/pool/Job.java new file mode 100644 index 0000000000..b9673cd48f --- /dev/null +++ b/java/common/src/main/java/org/apache/qpid/pool/Job.java @@ -0,0 +1,113 @@ +/* + * + * 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.pool; + +import org.apache.mina.common.IoSession; + +import java.util.concurrent.ConcurrentLinkedQueue; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; + +/** + * Holds events for a session that will be processed asynchronously by + * the thread pool in PoolingFilter. + */ +class Job implements Runnable +{ + private final int _maxEvents; + private final IoSession _session; + private final java.util.Queue<Event> _eventQueue = new ConcurrentLinkedQueue<Event>(); + private final AtomicBoolean _active = new AtomicBoolean(); + private final AtomicInteger _refCount = new AtomicInteger(); + private final JobCompletionHandler _completionHandler; + + Job(IoSession session, JobCompletionHandler completionHandler, int maxEvents) + { + _session = session; + _completionHandler = completionHandler; + _maxEvents = maxEvents; + } + + void acquire() + { + _refCount.incrementAndGet(); + } + + void release() + { + _refCount.decrementAndGet(); + } + + boolean isReferenced() + { + return _refCount.get() > 0; + } + + void add(Event evt) + { + _eventQueue.add(evt); + } + + void processAll() + { + //limit the number of events processed in one run + for (int i = 0; i < _maxEvents; i++) + { + Event e = _eventQueue.poll(); + if (e == null) + { + break; + } + else + { + e.process(_session); + } + } + } + + boolean isComplete() + { + return _eventQueue.peek() == null; + } + + boolean activate() + { + return _active.compareAndSet(false, true); + } + + void deactivate() + { + _active.set(false); + } + + public void run() + { + processAll(); + deactivate(); + _completionHandler.completed(_session, this); + } + + + static interface JobCompletionHandler + { + public void completed(IoSession session, Job job); + } +} |