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package org.mule.component; |
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import org.mule.DefaultMuleEvent; |
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import org.mule.DefaultMuleMessage; |
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import org.mule.OptimizedRequestContext; |
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import org.mule.VoidResult; |
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import org.mule.api.MuleContext; |
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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.construct.FlowConstruct; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.api.context.notification.ServerNotificationHandler; |
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import org.mule.api.interceptor.Interceptor; |
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import org.mule.api.lifecycle.Initialisable; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.lifecycle.Lifecycle; |
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import org.mule.api.lifecycle.LifecycleCallback; |
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import org.mule.api.lifecycle.LifecycleException; |
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import org.mule.api.processor.MessageProcessor; |
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import org.mule.api.processor.MessageProcessorChain; |
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import org.mule.api.service.Service; |
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import org.mule.api.transformer.Transformer; |
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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.construct.SimpleService; |
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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 org.mule.processor.chain.DefaultMessageProcessorChainBuilder; |
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import org.mule.transformer.TransformerTemplate; |
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import org.mule.transport.NullPayload; |
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import org.mule.util.ClassUtils; |
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|
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.List; |
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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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|
52 | 0 | public abstract class AbstractComponent implements Component, MuleContextAware, Lifecycle |
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{ |
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|
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|
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|
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|
58 | 0 | protected final Log logger = LogFactory.getLog(this.getClass()); |
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|
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protected FlowConstruct flowConstruct; |
61 | 0 | protected ComponentStatistics statistics = null; |
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protected ServerNotificationHandler notificationHandler; |
63 | 0 | protected List<Interceptor> interceptors = new ArrayList<Interceptor>(); |
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protected MessageProcessorChain interceptorChain; |
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protected MuleContext muleContext; |
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protected ComponentLifecycleManager lifecycleManager; |
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|
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public void setMuleContext(MuleContext context) |
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{ |
70 | 0 | this.muleContext = context; |
71 | 0 | } |
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|
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public List<Interceptor> getInterceptors() |
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{ |
75 | 0 | return interceptors; |
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} |
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|
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public void setInterceptors(List<Interceptor> interceptors) |
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{ |
80 | 0 | this.interceptors = interceptors; |
81 | 0 | } |
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|
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public AbstractComponent() |
84 | 0 | { |
85 | 0 | statistics = new ComponentStatistics(); |
86 | 0 | lifecycleManager = new ComponentLifecycleManager(getName(), this); |
87 | 0 | } |
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|
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private MuleEvent invokeInternal(MuleEvent event) throws MuleException |
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{ |
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|
92 | 0 | OptimizedRequestContext.unsafeSetEvent(event); |
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|
94 | 0 | if (logger.isTraceEnabled()) |
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{ |
96 | 0 | logger.trace(String.format("Invoking %s component for service %s", this.getClass().getName(), |
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flowConstruct.getName())); |
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} |
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|
100 | 0 | if (!lifecycleManager.getState().isStarted() || lifecycleManager.getState().isStopping()) |
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{ |
102 | 0 | throw new LifecycleException(CoreMessages.isStopped(flowConstruct.getName()), this); |
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} |
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|
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|
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try |
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{ |
108 | 0 | fireComponentNotification(event.getMessage(), ComponentMessageNotification.COMPONENT_PRE_INVOKE); |
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|
110 | 0 | long startTime = 0; |
111 | 0 | if (statistics.isEnabled()) |
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{ |
113 | 0 | startTime = System.currentTimeMillis(); |
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} |
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|
116 | 0 | Object result = doInvoke(event); |
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|
118 | 0 | if (statistics.isEnabled()) |
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{ |
120 | 0 | statistics.addExecutionTime(System.currentTimeMillis() - startTime); |
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} |
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|
123 | 0 | MuleEvent resultEvent = createResultEvent(event, result); |
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|
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|
126 | 0 | resultEvent.setStopFurtherProcessing(event.isStopFurtherProcessing()); |
127 | 0 | fireComponentNotification(resultEvent.getMessage(), |
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ComponentMessageNotification.COMPONENT_POST_INVOKE); |
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|
130 | 0 | return resultEvent; |
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} |
132 | 0 | catch (MuleException me) |
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{ |
134 | 0 | throw me; |
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} |
136 | 0 | catch (Exception e) |
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{ |
138 | 0 | throw new ComponentException(CoreMessages.failedToInvoke(this.toString()), event, this, e); |
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} |
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} |
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|
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
144 | 0 | if (interceptorChain == null) |
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{ |
146 | 0 | return invokeInternal(event); |
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} |
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else |
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{ |
150 | 0 | return interceptorChain.process(event); |
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} |
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} |
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|
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protected MuleEvent createResultEvent(MuleEvent event, Object result) throws MuleException |
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{ |
156 | 0 | if (result instanceof MuleMessage) |
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{ |
158 | 0 | return new DefaultMuleEvent((MuleMessage) result, event); |
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} |
160 | 0 | else if (result instanceof VoidResult) |
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{ |
162 | 0 | return event; |
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} |
164 | 0 | else if (result != null) |
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{ |
166 | 0 | event.getMessage().applyTransformers( |
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event, |
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Collections.<Transformer> singletonList(new TransformerTemplate( |
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new TransformerTemplate.OverwitePayloadCallback(result)))); |
170 | 0 | return event; |
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} |
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else |
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{ |
174 | 0 | return new DefaultMuleEvent(new DefaultMuleMessage(NullPayload.getInstance(), muleContext), event); |
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} |
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} |
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|
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protected abstract Object doInvoke(MuleEvent event) throws Exception; |
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|
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@Override |
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public String toString() |
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{ |
183 | 0 | return String.format("%s{%s}", ClassUtils.getSimpleName(this.getClass()), getName()); |
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} |
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|
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public void release() |
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{ |
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|
189 | 0 | } |
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|
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public ComponentStatistics getStatistics() |
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{ |
193 | 0 | return statistics; |
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} |
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|
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public void setFlowConstruct(FlowConstruct flowConstruct) |
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{ |
198 | 0 | this.flowConstruct = flowConstruct; |
199 | 0 | } |
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|
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public FlowConstruct getFlowConstruct() |
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{ |
203 | 0 | return flowConstruct; |
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} |
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|
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public final void initialise() throws InitialisationException |
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{ |
208 | 0 | if (flowConstruct == null) |
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{ |
210 | 0 | throw new InitialisationException( |
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MessageFactory.createStaticMessage("Component has not been initialized properly, no flow constuct."), |
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this); |
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} |
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|
215 | 0 | lifecycleManager.fireInitialisePhase(new LifecycleCallback<Component>() |
216 | 0 | { |
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public void onTransition(String phaseName, Component object) throws MuleException |
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{ |
219 | 0 | DefaultMessageProcessorChainBuilder chainBuilder = new DefaultMessageProcessorChainBuilder( |
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flowConstruct); |
221 | 0 | chainBuilder.setName("Component interceptor processor chain for :" + getName()); |
222 | 0 | for (Interceptor interceptor : interceptors) |
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{ |
224 | 0 | chainBuilder.chain(interceptor); |
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} |
226 | 0 | chainBuilder.chain(new MessageProcessor() |
227 | 0 | { |
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
230 | 0 | return invokeInternal(event); |
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} |
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}); |
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|
234 | 0 | interceptorChain = chainBuilder.build(); |
235 | 0 | if (interceptorChain instanceof MuleContextAware) |
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{ |
237 | 0 | ((MuleContextAware) interceptorChain).setMuleContext(muleContext); |
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} |
239 | 0 | if (interceptorChain instanceof Initialisable) |
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{ |
241 | 0 | ((Initialisable) interceptorChain).initialise(); |
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} |
243 | 0 | doInitialise(); |
244 | 0 | } |
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}); |
246 | 0 | } |
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|
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protected void doInitialise() throws InitialisationException |
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{ |
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|
251 | 0 | } |
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|
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public void dispose() |
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{ |
255 | 0 | lifecycleManager.fireDisposePhase(new LifecycleCallback<Component>() |
256 | 0 | { |
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public void onTransition(String phaseName, Component object) throws MuleException |
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{ |
259 | 0 | doDispose(); |
260 | 0 | } |
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}); |
262 | 0 | } |
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|
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protected void doDispose() |
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{ |
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|
267 | 0 | } |
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|
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public void stop() throws MuleException |
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{ |
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try |
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{ |
273 | 0 | lifecycleManager.fireStopPhase(new LifecycleCallback<Component>() |
274 | 0 | { |
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public void onTransition(String phaseName, Component object) throws MuleException |
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{ |
277 | 0 | doStop(); |
278 | 0 | } |
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}); |
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} |
281 | 0 | catch (MuleException e) |
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{ |
283 | 0 | e.printStackTrace(); |
284 | 0 | throw e; |
285 | 0 | } |
286 | 0 | } |
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|
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protected void doStart() throws MuleException |
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{ |
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|
291 | 0 | } |
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|
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public void start() throws MuleException |
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{ |
295 | 0 | lifecycleManager.fireStartPhase(new LifecycleCallback<Component>() |
296 | 0 | { |
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public void onTransition(String phaseName, Component object) throws MuleException |
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{ |
299 | 0 | notificationHandler = new OptimisedNotificationHandler(muleContext.getNotificationManager(), |
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ComponentMessageNotification.class); |
301 | 0 | doStart(); |
302 | 0 | } |
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}); |
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|
305 | 0 | } |
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|
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protected void doStop() throws MuleException |
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{ |
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|
310 | 0 | } |
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|
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protected void fireComponentNotification(MuleMessage message, int action) |
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{ |
314 | 0 | if (notificationHandler != null |
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&& notificationHandler.isNotificationEnabled(ComponentMessageNotification.class)) |
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{ |
317 | 0 | notificationHandler.fireNotification(new ComponentMessageNotification(message, this, |
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flowConstruct, action)); |
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} |
320 | 0 | } |
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|
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protected String getName() |
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{ |
324 | 0 | StringBuffer sb = new StringBuffer(); |
325 | 0 | if (flowConstruct != null) |
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{ |
327 | 0 | sb.append(flowConstruct.getName()); |
328 | 0 | sb.append("."); |
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} |
330 | 0 | sb.append("component"); |
331 | 0 | if (!(flowConstruct instanceof Service || flowConstruct instanceof SimpleService)) |
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{ |
333 | 0 | sb.append("."); |
334 | 0 | sb.append(System.identityHashCode(this)); |
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} |
336 | 0 | return sb.toString(); |
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} |
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|
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} |