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package org.mule.util.queue; |
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|
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import org.mule.api.MuleContext; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.util.queue.QueuePersistenceStrategy.Holder; |
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import org.mule.util.xa.AbstractTransactionContext; |
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import org.mule.util.xa.AbstractXAResourceManager; |
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import org.mule.util.xa.ResourceManagerException; |
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import org.mule.util.xa.ResourceManagerSystemException; |
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|
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.LinkedList; |
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import java.util.List; |
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import java.util.Map; |
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|
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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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|
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|
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|
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|
39 | 0 | public class TransactionalQueueManager extends AbstractXAResourceManager implements QueueManager, MuleContextAware |
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{ |
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|
42 | 0 | private static Log logger = LogFactory.getLog(TransactionalQueueManager.class); |
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|
44 | 0 | private Map<String, QueueInfo> queues = new HashMap<String, QueueInfo>(); |
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|
46 | 0 | private QueuePersistenceStrategy memoryPersistenceStrategy = new MemoryPersistenceStrategy(); |
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private QueuePersistenceStrategy persistenceStrategy; |
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|
49 | 0 | private QueueConfiguration defaultQueueConfiguration = new QueueConfiguration(false); |
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private MuleContext muleContext; |
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|
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public void setMuleContext(MuleContext context) |
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{ |
54 | 0 | this.muleContext = context; |
55 | 0 | } |
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|
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public MuleContext getMuleContext() |
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{ |
59 | 0 | return muleContext; |
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} |
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|
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public synchronized QueueSession getQueueSession() |
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{ |
64 | 0 | return new TransactionalQueueSession(this, this); |
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} |
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|
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public synchronized void setDefaultQueueConfiguration(QueueConfiguration config) |
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{ |
69 | 0 | this.defaultQueueConfiguration = config; |
70 | 0 | } |
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|
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public synchronized void setQueueConfiguration(String queueName, QueueConfiguration config) |
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{ |
74 | 0 | getQueue(queueName).config = config; |
75 | 0 | } |
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|
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protected synchronized QueueInfo getQueue(String name) |
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{ |
79 | 0 | QueueInfo q = queues.get(name); |
80 | 0 | if (q == null) |
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{ |
82 | 0 | q = new QueueInfo(); |
83 | 0 | q.name = name; |
84 | 0 | q.list = new LinkedList(); |
85 | 0 | q.config = defaultQueueConfiguration; |
86 | 0 | queues.put(name, q); |
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} |
88 | 0 | return q; |
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} |
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|
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protected Log getLogger() |
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{ |
93 | 0 | return logger; |
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} |
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|
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protected void doStart() throws ResourceManagerSystemException |
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{ |
98 | 0 | if (persistenceStrategy != null) |
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{ |
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try |
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{ |
102 | 0 | persistenceStrategy.open(); |
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} |
104 | 0 | catch (IOException e) |
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{ |
106 | 0 | throw new ResourceManagerSystemException(e); |
107 | 0 | } |
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} |
109 | 0 | } |
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|
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protected boolean shutdown(int mode, long timeoutMSecs) |
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{ |
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try |
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{ |
115 | 0 | if (persistenceStrategy != null) |
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{ |
117 | 0 | persistenceStrategy.close(); |
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} |
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} |
120 | 0 | catch (IOException e) |
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{ |
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|
123 | 0 | logger.error("Error closing persistent store", e); |
124 | 0 | } |
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|
126 | 0 | synchronized (this) |
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{ |
128 | 0 | queues.clear(); |
129 | 0 | } |
130 | 0 | return super.shutdown(mode, timeoutMSecs); |
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} |
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|
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protected void recover() throws ResourceManagerSystemException |
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{ |
135 | 0 | if (persistenceStrategy != null) |
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{ |
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try |
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{ |
139 | 0 | List msgs = persistenceStrategy.restore(); |
140 | 0 | for (Object msg : msgs) |
141 | |
{ |
142 | 0 | Holder h = (Holder) msg; |
143 | 0 | getQueue(h.getQueue()).putNow(h.getId()); |
144 | 0 | } |
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} |
146 | 0 | catch (Exception e) |
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{ |
148 | 0 | throw new ResourceManagerSystemException(e); |
149 | 0 | } |
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} |
151 | 0 | } |
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|
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protected AbstractTransactionContext createTransactionContext(Object session) |
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{ |
155 | 0 | return new QueueTransactionContext(); |
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} |
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|
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protected void doBegin(AbstractTransactionContext context) |
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{ |
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|
161 | 0 | } |
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|
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protected int doPrepare(AbstractTransactionContext context) |
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{ |
165 | 0 | return XAResource.XA_OK; |
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} |
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|
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protected void doCommit(AbstractTransactionContext context) throws ResourceManagerException |
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{ |
170 | 0 | QueueTransactionContext ctx = (QueueTransactionContext) context; |
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try |
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{ |
173 | 0 | if (ctx.added != null) |
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{ |
175 | 0 | for (Object o : ctx.added.entrySet()) |
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{ |
177 | 0 | Map.Entry entry = (Map.Entry) o; |
178 | 0 | QueueInfo queue = (QueueInfo) entry.getKey(); |
179 | 0 | List queueAdded = (List) entry.getValue(); |
180 | 0 | if (queueAdded != null && queueAdded.size() > 0) |
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{ |
182 | 0 | for (Object object : queueAdded) |
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{ |
184 | 0 | Object id = doStore(queue, object); |
185 | 0 | queue.putNow(id); |
186 | 0 | } |
187 | |
} |
188 | 0 | } |
189 | |
} |
190 | 0 | if (ctx.removed != null) |
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{ |
192 | 0 | for (Object o : ctx.removed.entrySet()) |
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{ |
194 | 0 | Map.Entry entry = (Map.Entry) o; |
195 | 0 | QueueInfo queue = (QueueInfo) entry.getKey(); |
196 | 0 | List queueRemoved = (List) entry.getValue(); |
197 | 0 | if (queueRemoved != null && queueRemoved.size() > 0) |
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{ |
199 | 0 | for (Object id : queueRemoved) |
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{ |
201 | 0 | doRemove(queue, id); |
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} |
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} |
204 | 0 | } |
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} |
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} |
207 | 0 | catch (Exception e) |
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{ |
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|
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|
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|
212 | 0 | throw new ResourceManagerException(e); |
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} |
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finally |
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{ |
216 | 0 | ctx.added = null; |
217 | 0 | ctx.removed = null; |
218 | 0 | } |
219 | 0 | } |
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|
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protected Object doStore(QueueInfo queue, Object object) throws IOException |
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{ |
223 | 0 | QueuePersistenceStrategy ps = (queue.config.persistent) |
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? persistenceStrategy : memoryPersistenceStrategy; |
225 | 0 | Object id = ps.store(queue.name, object); |
226 | 0 | return id; |
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} |
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|
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protected void doRemove(QueueInfo queue, Object id) throws IOException |
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{ |
231 | 0 | QueuePersistenceStrategy ps = (queue.config.persistent) |
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? persistenceStrategy : memoryPersistenceStrategy; |
233 | 0 | ps.remove(queue.name, id); |
234 | 0 | } |
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|
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protected Object doLoad(QueueInfo queue, Object id) throws IOException |
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{ |
238 | 0 | QueuePersistenceStrategy ps = (queue.config.persistent) |
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? persistenceStrategy : memoryPersistenceStrategy; |
240 | 0 | Object obj = ps.load(queue.name, id); |
241 | 0 | return obj; |
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} |
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|
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protected void doRollback(AbstractTransactionContext context) throws ResourceManagerException |
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{ |
246 | 0 | QueueTransactionContext ctx = (QueueTransactionContext) context; |
247 | 0 | if (ctx.removed != null) |
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{ |
249 | 0 | for (Object o : ctx.removed.entrySet()) |
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{ |
251 | 0 | Map.Entry entry = (Map.Entry) o; |
252 | 0 | QueueInfo queue = (QueueInfo) entry.getKey(); |
253 | 0 | List queueRemoved = (List) entry.getValue(); |
254 | 0 | if (queueRemoved != null && queueRemoved.size() > 0) |
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{ |
256 | 0 | for (Object id : queueRemoved) |
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{ |
258 | 0 | queue.putNow(id); |
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} |
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} |
261 | 0 | } |
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} |
263 | 0 | ctx.added = null; |
264 | 0 | ctx.removed = null; |
265 | 0 | } |
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|
267 | 0 | protected class QueueTransactionContext extends AbstractTransactionContext |
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{ |
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protected Map added; |
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protected Map removed; |
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|
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@SuppressWarnings("unchecked") |
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public boolean offer(QueueInfo queue, Object item, long timeout) throws InterruptedException |
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{ |
275 | 0 | readOnly = false; |
276 | 0 | if (added == null) |
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{ |
278 | 0 | added = new HashMap(); |
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} |
280 | 0 | List queueAdded = (List) added.get(queue); |
281 | 0 | if (queueAdded == null) |
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{ |
283 | 0 | queueAdded = new ArrayList(); |
284 | 0 | added.put(queue, queueAdded); |
285 | |
} |
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|
287 | 0 | if (queue.offer(null, queueAdded.size(), timeout)) |
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{ |
289 | 0 | queueAdded.add(item); |
290 | 0 | return true; |
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} |
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else |
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{ |
294 | 0 | return false; |
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} |
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} |
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|
298 | |
@SuppressWarnings("unchecked") |
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public Object poll(QueueInfo queue, long timeout) throws IOException, InterruptedException |
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{ |
301 | 0 | readOnly = false; |
302 | 0 | if (added != null) |
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{ |
304 | 0 | List queueAdded = (List)added.get(queue); |
305 | 0 | if (queueAdded != null) |
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{ |
307 | 0 | return queueAdded.remove(queueAdded.size() - 1); |
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} |
309 | |
} |
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Object o; |
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try |
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{ |
313 | 0 | o = queue.poll(timeout); |
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} |
315 | 0 | catch (InterruptedException e) |
316 | |
{ |
317 | 0 | if (muleContext.isStopping()) |
318 | |
{ |
319 | 0 | throw e; |
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} |
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|
322 | 0 | return null; |
323 | 0 | } |
324 | 0 | if (o != null) |
325 | |
{ |
326 | 0 | if (removed == null) |
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{ |
328 | 0 | removed = new HashMap(); |
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} |
330 | 0 | List queueRemoved = (List) removed.get(queue); |
331 | 0 | if (queueRemoved == null) |
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{ |
333 | 0 | queueRemoved = new ArrayList(); |
334 | 0 | removed.put(queue, queueRemoved); |
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} |
336 | 0 | queueRemoved.add(o); |
337 | 0 | o = doLoad(queue, o); |
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} |
339 | 0 | return o; |
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} |
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|
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public Object peek(QueueInfo queue) throws IOException, InterruptedException |
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{ |
344 | 0 | readOnly = false; |
345 | 0 | if (added != null) |
346 | |
{ |
347 | 0 | List queueAdded = (List) added.get(queue); |
348 | 0 | if (queueAdded != null) |
349 | |
{ |
350 | 0 | return queueAdded.get(queueAdded.size() - 1); |
351 | |
} |
352 | |
} |
353 | 0 | Object o = queue.peek(); |
354 | 0 | if (o != null) |
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{ |
356 | 0 | o = doLoad(queue, o); |
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} |
358 | 0 | return o; |
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} |
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|
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public int size(QueueInfo queue) |
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{ |
363 | 0 | int sz = queue.list.size(); |
364 | 0 | if (added != null) |
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{ |
366 | 0 | List queueAdded = (List) added.get(queue); |
367 | 0 | if (queueAdded != null) |
368 | |
{ |
369 | 0 | sz += queueAdded.size(); |
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} |
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} |
372 | 0 | return sz; |
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} |
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|
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} |
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|
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public QueuePersistenceStrategy getPersistenceStrategy() |
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{ |
379 | 0 | return persistenceStrategy; |
380 | |
} |
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|
382 | |
public void setPersistenceStrategy(QueuePersistenceStrategy persistenceStrategy) |
383 | |
{ |
384 | 0 | if (operationMode != OPERATION_MODE_STOPPED) |
385 | |
{ |
386 | 0 | throw new IllegalStateException(); |
387 | |
} |
388 | 0 | this.persistenceStrategy = persistenceStrategy; |
389 | 0 | } |
390 | |
|
391 | |
public QueuePersistenceStrategy getMemoryPersistenceStrategy() |
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{ |
393 | 0 | return memoryPersistenceStrategy; |
394 | |
} |
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|
396 | |
public void setMemoryPersistenceStrategy(QueuePersistenceStrategy memoryPersistenceStrategy) |
397 | |
{ |
398 | 0 | if (operationMode != OPERATION_MODE_STOPPED) |
399 | |
{ |
400 | 0 | throw new IllegalStateException(); |
401 | |
} |
402 | 0 | this.memoryPersistenceStrategy = memoryPersistenceStrategy; |
403 | 0 | } |
404 | |
|
405 | |
} |