diff options
Diffstat (limited to 'qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java')
-rw-r--r-- | qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java | 99 |
1 files changed, 4 insertions, 95 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java index e0c181a5fc..db32f13d8d 100644 --- a/qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java +++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/message/AMQMessage.java @@ -30,20 +30,17 @@ import org.apache.qpid.server.configuration.SessionConfig; import org.apache.qpid.server.queue.AMQQueue; -import java.util.concurrent.atomic.AtomicInteger; import java.lang.ref.WeakReference; import java.nio.ByteBuffer; /** * A deliverable message. */ -public class AMQMessage implements ServerMessage +public class AMQMessage extends AbstractServerMessageImpl { /** Used for debugging purposes. */ private static final Logger _log = Logger.getLogger(AMQMessage.class); - private final AtomicInteger _referenceCount = new AtomicInteger(0); - /** Flag to indicate that this message requires 'immediate' delivery. */ private static final byte IMMEDIATE = 0x01; @@ -76,6 +73,8 @@ public class AMQMessage implements ServerMessage public AMQMessage(StoredMessage<MessageMetaData> handle, WeakReference<AMQChannel> channelRef) { + super(handle); + _handle = handle; final MessageMetaData metaData = handle.getMetaData(); _size = metaData.getContentSize(); @@ -89,12 +88,6 @@ public class AMQMessage implements ServerMessage _channelRef = channelRef; } - - public String debugIdentity() - { - return "(HC:" + System.identityHashCode(this) + " ID:" + getMessageId() + " Ref:" + _referenceCount.get() + ")"; - } - public void setExpiration(final long expiration) { @@ -102,11 +95,6 @@ public class AMQMessage implements ServerMessage } - public boolean isReferenced() - { - return _referenceCount.get() > 0; - } - public MessageMetaData getMessageMetaData() { return _handle.getMetaData(); @@ -117,88 +105,12 @@ public class AMQMessage implements ServerMessage return getMessageMetaData().getContentHeaderBody(); } - - public Long getMessageId() { return _handle.getMessageNumber(); } /** - * Creates a long-lived reference to this message, and increments the count of such references, as an atomic - * operation. - */ - public AMQMessage takeReference() - { - incrementReference(); // _referenceCount.incrementAndGet(); - - return this; - } - - public boolean incrementReference() - { - return incrementReference(1); - } - - /* Threadsafe. Increment the reference count on the message. */ - public boolean incrementReference(int count) - { - - if(_referenceCount.addAndGet(count) <= 0) - { - _referenceCount.addAndGet(-count); - return false; - } - else - { - return true; - } - - } - - /** - * Threadsafe. This will decrement the reference count and when it reaches zero will remove the message from the - * message store. - * - * - * @throws org.apache.qpid.server.queue.MessageCleanupException when an attempt was made to remove the message from the message store and that - * failed - */ - public void decrementReference() - { - int count = _referenceCount.decrementAndGet(); - - // note that the operation of decrementing the reference count and then removing the message does not - // have to be atomic since the ref count starts at 1 and the exchange itself decrements that after - // the message has been passed to all queues. i.e. we are - // not relying on the all the increments having taken place before the delivery manager decrements. - if (count == 0) - { - // set the reference count way below 0 so that we can detect that the message has been deleted - // this is to guard against the message being spontaneously recreated (from the mgmt console) - // by copying from other queues at the same time as it is being removed. - _referenceCount.set(Integer.MIN_VALUE/2); - - // must check if the handle is null since there may be cases where we decide to throw away a message - // and the handle has not yet been constructed - if (_handle != null) - { - _handle.remove(); - - } - } - else - { - if (count < 0) - { - throw new RuntimeException("Reference count for message id " + debugIdentity() - + " has gone below 0."); - } - } - } - - - /** * Called selectors to determin if the message has already been sent * * @return _deliveredToConsumer @@ -323,10 +235,7 @@ public class AMQMessage implements ServerMessage public String toString() { - // return "Message[" + debugIdentity() + "]: " + _messageId + "; ref count: " + _referenceCount + "; taken : " + - // _taken + " by :" + _takenBySubcription; - - return "Message[" + debugIdentity() + "]: " + getMessageId() + "; ref count: " + _referenceCount; + return "Message[" + debugIdentity() + "]: " + getMessageId() + "; ref count: " + getReferenceCount(); } public int getContent(ByteBuffer buf, int offset) |