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package org.mule.impl.model.resolvers; |
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import org.mule.api.MuleEventContext; |
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import org.mule.api.annotations.meta.Evaluator; |
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import org.mule.api.config.MuleProperties; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.model.InvocationResult; |
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import org.mule.api.transformer.Transformer; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.api.transport.PropertyScope; |
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import org.mule.config.expression.ExpressionAnnotationsHelper; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.expression.transformers.ExpressionTransformer; |
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import org.mule.model.resolvers.AbstractEntryPointResolver; |
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import org.mule.transport.NullPayload; |
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import org.mule.util.ClassUtils; |
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import org.mule.util.annotation.AnnotationUtils; |
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import java.lang.reflect.Method; |
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import java.util.Map; |
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import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap; |
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import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean; |
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import net.sf.cglib.proxy.Enhancer; |
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71 | 0 | public class AnnotatedEntryPointResolver extends AbstractEntryPointResolver |
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{ |
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74 | 0 | private AtomicBoolean cacheBuilt = new AtomicBoolean(false); |
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77 | 0 | @SuppressWarnings("unchecked") |
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private Map<Method, Transformer> transformerCache = new ConcurrentHashMap(); |
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public InvocationResult invoke(Object component, MuleEventContext context) throws Exception |
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{ |
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try |
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{ |
84 | 0 | initCache(component, context); |
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} |
86 | 0 | catch (Exception e) |
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{ |
88 | 0 | InvocationResult result = new InvocationResult(this, InvocationResult.State.NOT_SUPPORTED); |
89 | 0 | result.setErrorMessage(e.toString()); |
90 | 0 | return result; |
91 | 0 | } |
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93 | 0 | if(methodCache.size()==0) |
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{ |
95 | 0 | InvocationResult result = new InvocationResult(this, InvocationResult.State.NOT_SUPPORTED); |
96 | 0 | result.setErrorMessage("Component: " + component + " doesn't have any annotated methods, skipping."); |
97 | 0 | return result; |
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} |
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Object[] payload; |
101 | 0 | Method method = null; |
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103 | 0 | Object tempMethod = context.getMessage().removeProperty(MuleProperties.MULE_METHOD_PROPERTY, PropertyScope.INVOCATION); |
104 | 0 | String methodName = null; |
105 | 0 | if (tempMethod != null && tempMethod instanceof Method) |
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{ |
107 | 0 | method = (Method) tempMethod; |
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} |
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else |
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{ |
111 | 0 | methodName = (String)tempMethod; |
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} |
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116 | 0 | if (methodName != null) |
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{ |
118 | 0 | method = getMethodByName(methodName, context); |
119 | 0 | if (method == null) |
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{ |
121 | 0 | InvocationResult result = new InvocationResult(this, InvocationResult.State.NOT_SUPPORTED); |
122 | 0 | result.setErrorMessage("Method not found: " + methodName + " on object: " + component.getClass() + ". If the component is a proxy there needs to be an interface on the proxy that defines this method"); |
123 | 0 | return result; |
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} |
126 | 0 | payload = getPayloadForMethod(method, component, context); |
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} |
128 | 0 | else if (method != null) |
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{ |
130 | 0 | payload = getPayloadForMethod(method, component, context); |
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} |
132 | 0 | else if (methodCache.size() == 1) |
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{ |
134 | 0 | method = (Method) methodCache.values().iterator().next(); |
135 | 0 | payload = getPayloadForMethod(method, component, context); |
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} |
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else |
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{ |
139 | 0 | InvocationResult result = new InvocationResult(this, InvocationResult.State.FAILED); |
140 | 0 | result.setErrorMessage("Component: " + component + " has more than one method annotated, which means the target method name needs to be set on the event"); |
141 | 0 | return result; |
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} |
143 | 0 | return invokeMethod(component, method, |
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(method.getParameterTypes().length == 0 ? ClassUtils.NO_ARGS : payload)); |
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} |
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protected Object[] getPayloadForMethod(Method method, Object component, MuleEventContext context) throws TransformerException, InitialisationException |
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{ |
149 | 0 | Object[] payload = null; |
150 | 0 | Method m = method; |
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152 | 0 | if (Enhancer.isEnhanced(component.getClass())) |
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{ |
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try |
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{ |
156 | 0 | m = component.getClass().getSuperclass().getMethod(method.getName(), method.getParameterTypes()); |
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} |
158 | 0 | catch (NoSuchMethodException e) |
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{ |
160 | 0 | throw new TransformerException(CoreMessages.createStaticMessage(e.getMessage()), e); |
161 | 0 | } |
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} |
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164 | 0 | if (AnnotationUtils.getParamAnnotationsWithMeta(m, Evaluator.class).size() > 0) |
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{ |
166 | 0 | payload = getPayloadFromMessageWithAnnotations(m, context); |
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} |
168 | 0 | return payload; |
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} |
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protected Object[] getPayloadFromMessageWithAnnotations(Method method, MuleEventContext context) throws TransformerException, InitialisationException |
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{ |
173 | 0 | ExpressionTransformer trans = (ExpressionTransformer) transformerCache.get(method); |
174 | 0 | if (trans == null) |
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{ |
176 | 0 | trans = ExpressionAnnotationsHelper.getTransformerForMethodWithAnnotations(method, context.getMuleContext()); |
177 | 0 | transformerCache.put(method, trans); |
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} |
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180 | 0 | Object o = trans.transform(context.getMessage()); |
181 | 0 | if (o instanceof NullPayload) |
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{ |
183 | 0 | return new Object[]{null}; |
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} |
185 | 0 | else if (o.getClass().isArray()) |
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{ |
187 | 0 | return (Object[]) o; |
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} |
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else |
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{ |
191 | 0 | return new Object[]{o}; |
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} |
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} |
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@Override |
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public String toString() |
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{ |
198 | 0 | final StringBuffer sb = new StringBuffer(); |
199 | 0 | sb.append("AnnotatedEntryPointResolver"); |
200 | 0 | sb.append(", acceptVoidMethods=").append(isAcceptVoidMethods()); |
201 | 0 | sb.append('}'); |
202 | 0 | return sb.toString(); |
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} |
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protected void initCache(Object component, MuleEventContext context) |
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{ |
208 | 0 | if (!cacheBuilt.get()) |
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{ |
210 | 0 | synchronized (this) |
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{ |
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try |
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{ |
214 | 0 | if (!cacheBuilt.get()) |
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{ |
216 | 0 | for (int i = 0; i < component.getClass().getMethods().length; i++) |
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{ |
218 | 0 | Method method = component.getClass().getMethods()[i]; |
219 | 0 | if (AnnotationUtils.getParamAnnotationsWithMeta(method, Evaluator.class).size() > 0) |
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{ |
221 | 0 | this.addMethodByName(method, context); |
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} |
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} |
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} |
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} |
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finally |
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{ |
228 | 0 | cacheBuilt.set(true); |
229 | 0 | } |
230 | 0 | } |
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} |
232 | 0 | } |
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} |