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package org.mule.component; |
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import org.mule.DefaultMuleEventContext; |
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import org.mule.VoidResult; |
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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.MuleRuntimeException; |
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import org.mule.api.component.JavaComponent; |
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import org.mule.api.component.LifecycleAdapter; |
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import org.mule.api.lifecycle.Callable; |
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import org.mule.api.lifecycle.Disposable; |
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import org.mule.api.lifecycle.Startable; |
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import org.mule.api.lifecycle.Stoppable; |
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import org.mule.api.object.ObjectFactory; |
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import org.mule.api.registry.ServiceException; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.object.SingletonObjectFactory; |
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import org.mule.transformer.TransformerTemplate; |
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import edu.emory.mathcs.backport.java.util.Collections; |
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public class SimpleCallableJavaComponent extends AbstractJavaComponent |
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{ |
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|
47 | 0 | private boolean started = false; |
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public SimpleCallableJavaComponent() |
50 | 0 | { |
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52 | 0 | } |
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public SimpleCallableJavaComponent(Callable callable) |
61 | 0 | { |
62 | 0 | objectFactory = new SingletonObjectFactory(callable); |
63 | 0 | } |
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public SimpleCallableJavaComponent(Class callable) throws DefaultMuleException |
74 | 0 | { |
75 | 0 | if (!(Callable.class.isAssignableFrom(callable))) |
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{ |
77 | 0 | throw new DefaultMuleException(CoreMessages.objectNotOfCorrectType(callable, Callable.class)); |
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} |
79 | 0 | objectFactory = new SingletonObjectFactory(callable); |
80 | 0 | } |
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public SimpleCallableJavaComponent(ObjectFactory objectFactory) throws DefaultMuleException |
83 | 0 | { |
84 | 0 | if (!(Callable.class.isAssignableFrom(objectFactory.getObjectClass()))) |
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{ |
86 | 0 | throw new DefaultMuleException(CoreMessages.objectNotOfCorrectType(objectFactory.getObjectClass(), |
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Callable.class)); |
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} |
89 | 0 | this.objectFactory = objectFactory; |
90 | 0 | } |
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@Override |
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protected void doStart() throws MuleException |
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{ |
95 | 0 | super.doStart(); |
96 | 0 | if (Startable.class.isAssignableFrom(objectFactory.getObjectClass())) |
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{ |
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try |
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{ |
100 | 0 | ((Startable) objectFactory.getInstance(muleContext)).start(); |
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} |
102 | 0 | catch (Exception e) |
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{ |
104 | 0 | throw new ServiceException(CoreMessages.failedToStart("Service '" + flowConstruct.getName() + "'"), e); |
105 | 0 | } |
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} |
107 | 0 | } |
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@Override |
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protected void doStop() throws MuleException |
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{ |
112 | 0 | super.doStop(); |
113 | 0 | if (started && Stoppable.class.isAssignableFrom(objectFactory.getObjectClass())) |
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{ |
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try |
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{ |
117 | 0 | ((Stoppable) objectFactory.getInstance(muleContext)).stop(); |
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} |
119 | 0 | catch (Exception e) |
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{ |
121 | 0 | throw new ServiceException(CoreMessages.failedToStop("Service '" + flowConstruct.getName() + "'"), e); |
122 | 0 | } |
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} |
124 | 0 | } |
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@Override |
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protected void doDispose() |
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{ |
129 | 0 | super.doDispose(); |
130 | 0 | if (Disposable.class.isAssignableFrom(objectFactory.getObjectClass())) |
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{ |
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try |
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{ |
134 | 0 | ((Disposable) objectFactory.getInstance(muleContext)).dispose(); |
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} |
136 | 0 | catch (Exception e) |
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{ |
138 | 0 | logger.error("Unable to dispose component instance", e); |
139 | 0 | } |
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} |
141 | 0 | } |
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@Override |
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public Class getObjectType() |
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{ |
146 | 0 | if (objectFactory != null) |
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{ |
148 | 0 | return objectFactory.getObjectClass(); |
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} |
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else |
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{ |
152 | 0 | return Callable.class; |
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} |
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} |
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@Override |
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protected LifecycleAdapter borrowComponentLifecycleAdaptor() throws Exception |
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{ |
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160 | 0 | return null; |
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} |
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@Override |
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protected void returnComponentLifecycleAdaptor(LifecycleAdapter lifecycleAdapter) |
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{ |
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167 | 0 | } |
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@Override |
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protected Object invokeComponentInstance(MuleEvent event) throws Exception |
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{ |
172 | 0 | Object result = ((Callable) objectFactory.getInstance(muleContext)).onCall(new DefaultMuleEventContext(event)); |
173 | 0 | if (result instanceof VoidResult) |
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{ |
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176 | 0 | return event.getMessage(); |
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} |
178 | 0 | else if (result != null) |
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{ |
180 | 0 | if (result instanceof MuleMessage) |
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{ |
182 | 0 | return result; |
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} |
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else |
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{ |
186 | 0 | event.getMessage().applyTransformers( |
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event, Collections.singletonList(new TransformerTemplate(new TransformerTemplate.OverwitePayloadCallback( |
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result)))); |
189 | 0 | return event.getMessage(); |
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} |
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} |
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else |
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{ |
194 | 0 | return null; |
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} |
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} |
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@Override |
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public void setObjectFactory(ObjectFactory objectFactory) |
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{ |
201 | 0 | if (!(Callable.class.isAssignableFrom(objectFactory.getObjectClass()))) |
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{ |
203 | 0 | throw new MuleRuntimeException(CoreMessages.objectNotOfCorrectType(objectFactory.getObjectClass(), |
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Callable.class)); |
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} |
206 | 0 | super.setObjectFactory(objectFactory); |
207 | 0 | } |
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} |