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package org.mule.transport.jms.xa; |
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import org.mule.api.transaction.Transaction; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.transaction.IllegalTransactionStateException; |
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import org.mule.transaction.TransactionCoordination; |
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import org.mule.transaction.XaTransaction; |
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|
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import java.lang.ref.Reference; |
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import java.lang.ref.WeakReference; |
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import java.lang.reflect.InvocationHandler; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Proxy; |
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|
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import javax.jms.JMSException; |
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import javax.jms.MessageConsumer; |
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import javax.jms.MessageProducer; |
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import javax.jms.QueueReceiver; |
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import javax.jms.QueueSender; |
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import javax.jms.Session; |
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import javax.jms.TopicPublisher; |
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import javax.jms.TopicSubscriber; |
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import javax.jms.XAQueueSession; |
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import javax.jms.XASession; |
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import javax.jms.XATopicSession; |
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import javax.transaction.xa.XAResource; |
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|
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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|
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public class SessionInvocationHandler implements InvocationHandler |
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{ |
42 | 6 | protected static final transient Log logger = LogFactory.getLog(SessionInvocationHandler.class); |
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|
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private XASession xaSession; |
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private XAResource xaResource; |
46 | 66 | private volatile boolean enlisted = false; |
47 | 65 | private volatile boolean reuseObject = false; |
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private final Reference underlyingObject; |
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private static final Method SESSION_CLOSE_METHOD; |
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|
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static |
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{ |
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try |
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{ |
55 | 6 | SESSION_CLOSE_METHOD = Session.class.getMethod("close", (Class[])null); |
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} |
57 | 0 | catch (NoSuchMethodException e) |
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{ |
59 | 0 | throw new RuntimeException(e); |
60 | 6 | } |
61 | 6 | } |
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|
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public SessionInvocationHandler(XASession xaSession) throws JMSException |
64 | 66 | { |
65 | 64 | this.xaSession = xaSession; |
66 | 65 | underlyingObject = new WeakReference(xaSession.getSession()); |
67 | 63 | this.xaResource = new XAResourceWrapper(xaSession.getXAResource(), this); |
68 | 65 | } |
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|
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public SessionInvocationHandler(XAQueueSession xaSession) throws JMSException |
71 | 0 | { |
72 | 0 | this.xaSession = xaSession; |
73 | 0 | underlyingObject = new WeakReference(xaSession.getQueueSession()); |
74 | 0 | this.xaResource = new XAResourceWrapper(xaSession.getXAResource(), this); |
75 | 0 | } |
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|
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public SessionInvocationHandler(XATopicSession xaSession) throws JMSException |
78 | 0 | { |
79 | 0 | this.xaSession = xaSession; |
80 | 0 | underlyingObject = new WeakReference(xaSession.getTopicSession()); |
81 | 0 | this.xaResource = new XAResourceWrapper(xaSession.getXAResource(), this); |
82 | 0 | } |
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|
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public Object invoke(Object proxy, Method method, Object[] args) throws Throwable |
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{ |
86 | 549 | if (logger.isDebugEnabled()) |
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{ |
88 | 0 | logger.debug("Invoking " + method); |
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} |
90 | 548 | if (underlyingObject.get() == null) |
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{ |
92 | 0 | throw new IllegalStateException("Underlying session is null, XASession " + xaSession); |
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} |
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|
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|
96 | 548 | if (XaTransaction.MuleXaObject.DELIST_METHOD_NAME.equals(method.getName())) |
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{ |
98 | 34 | return Boolean.valueOf(delist()); |
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} |
100 | 513 | else if (XaTransaction.MuleXaObject.ENLIST_METHOD_NAME.equals(method.getName())) |
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{ |
102 | 66 | return Boolean.valueOf(enlist()); |
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} |
104 | 446 | else if (XaTransaction.MuleXaObject.SET_REUSE_OBJECT_METHOD_NAME.equals(method.getName())) |
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{ |
106 | 51 | reuseObject = ((Boolean) args[0]).booleanValue(); |
107 | 50 | return null; |
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} |
109 | 396 | else if (XaTransaction.MuleXaObject.IS_REUSE_OBJECT_METHOD_NAME.equals(method.getName())) |
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{ |
111 | 67 | return Boolean.valueOf(reuseObject); |
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} |
113 | 328 | else if (XaTransaction.MuleXaObject.GET_TARGET_OBJECT_METHOD_NAME.equals(method.getName())) |
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{ |
115 | 0 | return getTargetObject(); |
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} |
117 | 328 | else if (XaTransaction.MuleXaObject.CLOSE_METHOD_NAME.equals(method.getName())) |
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{ |
119 | 61 | return SESSION_CLOSE_METHOD.invoke(underlyingObject.get(), args); |
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} |
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|
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|
123 | 268 | Object result = method.invoke(underlyingObject.get(), args); |
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|
125 | 268 | if (result instanceof TopicSubscriber) |
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{ |
127 | 8 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{TopicSubscriber.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
130 | 259 | else if (result instanceof QueueReceiver) |
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{ |
132 | 0 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{QueueReceiver.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
135 | 260 | else if (result instanceof MessageConsumer) |
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{ |
137 | 42 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{MessageConsumer.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
140 | 218 | else if (result instanceof TopicPublisher) |
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{ |
142 | 0 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{TopicPublisher.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
145 | 218 | else if (result instanceof QueueSender) |
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{ |
147 | 0 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{QueueSender.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
150 | 218 | else if (result instanceof MessageProducer) |
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{ |
152 | 26 | result = Proxy.newProxyInstance(Session.class.getClassLoader(), |
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new Class[]{MessageProducer.class}, new ConsumerProducerInvocationHandler(this, result)); |
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} |
155 | 267 | return result; |
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} |
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|
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public boolean enlist() throws Exception |
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{ |
160 | 67 | if (isEnlisted()) |
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{ |
162 | 0 | return false; |
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} |
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|
165 | 67 | if (logger.isDebugEnabled()) |
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{ |
167 | 0 | logger.debug("Enlistment request: " + this); |
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} |
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|
170 | 67 | Transaction transaction = TransactionCoordination.getInstance().getTransaction(); |
171 | 66 | if (transaction == null) |
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{ |
173 | 0 | throw new IllegalTransactionStateException(CoreMessages.noMuleTransactionAvailable()); |
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} |
175 | 67 | if (!(transaction instanceof XaTransaction)) |
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{ |
177 | 0 | throw new IllegalTransactionStateException(CoreMessages.notMuleXaTransaction(transaction)); |
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} |
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|
180 | 67 | if (!isEnlisted()) |
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{ |
182 | 67 | if (logger.isDebugEnabled()) |
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{ |
184 | 0 | logger.debug("Enlisting resource " + xaResource + " in xa transaction " + transaction); |
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} |
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|
187 | 67 | enlisted = ((XaTransaction) transaction).enlistResource(xaResource); |
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} |
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|
190 | 67 | return enlisted; |
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} |
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|
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public boolean delist() throws Exception |
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{ |
195 | 34 | if (!isEnlisted()) |
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{ |
197 | 0 | return false; |
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} |
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|
200 | 34 | if (logger.isDebugEnabled()) |
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{ |
202 | 0 | logger.debug("Delistment request: " + this); |
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} |
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|
205 | 34 | Transaction transaction = TransactionCoordination.getInstance().getTransaction(); |
206 | 34 | if (transaction == null) |
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{ |
208 | 0 | throw new IllegalTransactionStateException(CoreMessages.noMuleTransactionAvailable()); |
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} |
210 | 34 | if (!(transaction instanceof XaTransaction)) |
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{ |
212 | 0 | throw new IllegalTransactionStateException(CoreMessages.notMuleXaTransaction(transaction)); |
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} |
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|
215 | 34 | if (isEnlisted()) |
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{ |
217 | 34 | if (logger.isDebugEnabled()) |
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{ |
219 | 0 | logger.debug("Delisting resource " + xaResource + " in xa transaction " + transaction); |
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} |
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|
222 | 34 | enlisted = !((XaTransaction) transaction).delistResource(xaResource, XAResource.TMSUCCESS); |
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} |
224 | 34 | return !isEnlisted(); |
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} |
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|
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public boolean isEnlisted() |
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{ |
229 | 236 | return enlisted; |
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} |
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|
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public void setEnlisted(boolean enlisted) |
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{ |
234 | 46 | this.enlisted = enlisted; |
235 | 46 | } |
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|
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public XASession getTargetObject() |
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{ |
239 | 0 | return xaSession; |
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} |
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|
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public XAResource getXAResource() |
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{ |
244 | 0 | return xaResource; |
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} |
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|
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} |