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package org.mule.component; |
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import org.mule.OptimizedRequestContext; |
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import org.mule.api.DefaultMuleException; |
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import org.mule.api.MuleEvent; |
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import org.mule.api.MuleException; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.component.Component; |
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import org.mule.api.context.notification.ServerNotificationHandler; |
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import org.mule.api.endpoint.InboundEndpoint; |
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import org.mule.api.lifecycle.DisposeException; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.service.Service; |
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import org.mule.api.service.ServiceException; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.config.i18n.MessageFactory; |
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import org.mule.context.notification.ComponentMessageNotification; |
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import org.mule.context.notification.OptimisedNotificationHandler; |
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import org.mule.management.stats.ComponentStatistics; |
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import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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public abstract class AbstractComponent implements Component |
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{ |
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|
45 | 852 | protected final Log logger = LogFactory.getLog(this.getClass()); |
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protected Service service; |
48 | 852 | protected ComponentStatistics statistics = null; |
49 | 852 | protected final AtomicBoolean started = new AtomicBoolean(false); |
50 | 852 | protected final AtomicBoolean stopping = new AtomicBoolean(false); |
51 | 852 | protected final AtomicBoolean initialised = new AtomicBoolean(false); |
52 | 852 | protected final AtomicBoolean disposing = new AtomicBoolean(false); |
53 | 852 | protected final AtomicBoolean disposed = new AtomicBoolean(false); |
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protected ServerNotificationHandler notificationHandler; |
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|
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public AbstractComponent() |
57 | 852 | { |
58 | 852 | statistics = new ComponentStatistics(); |
59 | 852 | } |
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|
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public MuleMessage onCall(MuleEvent event) throws MuleException |
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{ |
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|
64 | 0 | OptimizedRequestContext.unsafeSetEvent(event); |
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|
66 | 0 | if (logger.isTraceEnabled()) |
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{ |
68 | 0 | logger.trace("Invoking " + this.getClass().getName() + "component for service " + service.getName()); |
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} |
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|
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|
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|
73 | 0 | checkDisposed(); |
74 | 0 | if (!(event.getEndpoint() instanceof InboundEndpoint)) |
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{ |
76 | 0 | throw new IllegalStateException( |
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"Unable to process outbound event, components only process incoming events."); |
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} |
79 | 0 | if (stopping.get() || !started.get()) |
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{ |
81 | 0 | throw new DefaultMuleException(CoreMessages.componentIsStopped(service.getName())); |
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} |
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|
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|
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try |
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{ |
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|
88 | 0 | fireComponentNotification(event.getMessage(), ComponentMessageNotification.COMPONENT_PRE_INVOKE); |
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|
90 | 0 | long startTime = 0; |
91 | 0 | if (statistics.isEnabled()) |
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{ |
93 | 0 | startTime = System.currentTimeMillis(); |
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} |
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|
96 | 0 | MuleMessage result = doOnCall(event); |
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|
98 | 0 | if (statistics.isEnabled()) |
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{ |
100 | 0 | statistics.addExecutionTime(System.currentTimeMillis() - startTime); |
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} |
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|
103 | 0 | fireComponentNotification(result, ComponentMessageNotification.COMPONENT_POST_INVOKE); |
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|
105 | 0 | return result; |
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} |
107 | 0 | catch (MuleException me) |
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{ |
109 | 0 | throw me; |
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} |
111 | 0 | catch (Exception e) |
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{ |
113 | 0 | throw new ServiceException(CoreMessages.failedToInvoke(this.toString()), event.getMessage(), service, e); |
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} |
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} |
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|
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protected abstract MuleMessage doOnCall(MuleEvent event) throws Exception; |
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|
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public String toString() |
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{ |
121 | 0 | return this.getClass().getName() + " component for: " + service.toString(); |
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} |
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|
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public void release() |
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{ |
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|
127 | 0 | } |
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|
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public ComponentStatistics getStatistics() |
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{ |
131 | 398 | return statistics; |
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} |
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public void setService(Service service) |
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{ |
136 | 824 | this.service = service; |
137 | 824 | } |
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|
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public Service getService() |
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{ |
141 | 0 | return service; |
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} |
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public final void initialise() throws InitialisationException |
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{ |
146 | 426 | if (!initialised.get()) |
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{ |
148 | 426 | if (logger.isInfoEnabled()) |
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{ |
150 | 0 | logger.info("Initialising: " + this); |
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} |
152 | 426 | if (service == null) |
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{ |
154 | 0 | throw new InitialisationException( |
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MessageFactory.createStaticMessage("Component has not been initialized properly, no service."), |
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this); |
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} |
158 | 426 | doInitialise(); |
159 | 426 | initialised.set(true); |
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} |
161 | 426 | } |
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|
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protected void doInitialise() throws InitialisationException |
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{ |
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|
166 | 4 | } |
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|
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public void dispose() |
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{ |
170 | 20 | disposing.set(true); |
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try |
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{ |
173 | 20 | if (started.get()) |
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{ |
175 | 4 | stop(); |
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} |
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} |
178 | 0 | catch (MuleException e) |
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{ |
180 | 0 | logger.error(CoreMessages.failedToStop(toString())); |
181 | 20 | } |
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try |
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{ |
184 | 20 | doDispose(); |
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} |
186 | 0 | catch (Exception e) |
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{ |
188 | 0 | logger.warn(CoreMessages.failedToDispose(toString()), e); |
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} |
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finally |
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{ |
192 | 20 | disposed.set(true); |
193 | 20 | disposing.set(false); |
194 | 20 | initialised.set(false); |
195 | 20 | } |
196 | 20 | } |
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|
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protected void doDispose() |
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{ |
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|
201 | 2 | } |
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|
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public void stop() throws MuleException |
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{ |
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|
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|
207 | 34 | if (!disposed.get() && started.get() && !stopping.get()) |
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{ |
209 | 34 | stopping.set(true); |
210 | 34 | if (logger.isInfoEnabled()) |
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{ |
212 | 0 | logger.info("Stopping: " + this); |
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} |
214 | 34 | doStop(); |
215 | 34 | started.set(false); |
216 | 34 | stopping.set(false); |
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} |
218 | 34 | } |
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|
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protected void doStart() throws MuleException |
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{ |
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|
223 | 4 | } |
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|
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public void start() throws MuleException |
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{ |
227 | 54 | checkDisposed(); |
228 | 54 | if (!started.get()) |
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{ |
230 | 54 | if (logger.isInfoEnabled()) |
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{ |
232 | 0 | logger.info("Starting: " + this); |
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} |
234 | 54 | notificationHandler = new OptimisedNotificationHandler(service.getMuleContext() |
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.getNotificationManager(), ComponentMessageNotification.class); |
236 | 54 | doStart(); |
237 | 54 | started.set(true); |
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} |
239 | 54 | } |
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|
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protected void doStop() throws MuleException |
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{ |
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|
244 | 34 | } |
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|
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protected void checkDisposed() throws DisposeException |
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{ |
248 | 56 | if (disposed.get()) |
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{ |
250 | 2 | throw new DisposeException(CoreMessages.createStaticMessage("Cannot use a disposed component"), this); |
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} |
252 | 54 | } |
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|
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protected void fireComponentNotification(MuleMessage message, int action) |
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{ |
256 | 0 | if (notificationHandler.isNotificationEnabled(ComponentMessageNotification.class)) |
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{ |
258 | 0 | notificationHandler.fireNotification(new ComponentMessageNotification(message, this, action)); |
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} |
260 | 0 | } |
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|
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} |