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package org.mule.processor.builder; |
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import org.mule.DefaultMuleEvent; |
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import org.mule.OptimizedRequestContext; |
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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.construct.FlowConstruct; |
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import org.mule.api.endpoint.OutboundEndpoint; |
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import org.mule.api.lifecycle.Disposable; |
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import org.mule.api.processor.InterceptingMessageProcessor; |
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import org.mule.api.processor.MessageProcessor; |
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import org.mule.api.processor.MessageProcessorBuilder; |
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import org.mule.construct.SimpleFlowConstruct; |
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import org.mule.processor.AbstractInterceptingMessageProcessor; |
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import org.mule.processor.NullMessageProcessor; |
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import java.util.ArrayList; |
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import java.util.List; |
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public class InterceptingChainMessageProcessorBuilder implements MessageProcessorBuilder |
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{ |
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|
47 | 0 | protected List processors = new ArrayList(); |
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protected String name; |
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protected FlowConstruct flowConstruct; |
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public InterceptingChainMessageProcessorBuilder() |
52 | 0 | { |
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54 | 0 | } |
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public InterceptingChainMessageProcessorBuilder(FlowConstruct flowConstruct) |
57 | 0 | { |
58 | 0 | this.flowConstruct = flowConstruct; |
59 | 0 | } |
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public MessageProcessor build() throws MuleException |
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{ |
63 | 0 | if (processors.isEmpty()) |
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{ |
65 | 0 | return new NullMessageProcessor(); |
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} |
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|
68 | 0 | InterceptingMessageProcessor first = createInterceptingMessageProcessor(initializeMessageProcessor(processors.get(0))); |
69 | 0 | MessageProcessor composite = new InterceptingChainCompositeMessageProcessor(first, processors, name); |
70 | 0 | InterceptingMessageProcessor current = first; |
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|
72 | 0 | for (int i = 1; i < processors.size(); i++) |
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{ |
74 | 0 | InterceptingMessageProcessor mp = createInterceptingMessageProcessor(initializeMessageProcessor(processors.get(i))); |
75 | 0 | current.setListener(mp); |
76 | 0 | current = mp; |
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} |
78 | 0 | return composite; |
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} |
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protected MessageProcessor initializeMessageProcessor(Object processor) throws MuleException |
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{ |
84 | 0 | if (processor instanceof MessageProcessorBuilder) |
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{ |
86 | 0 | return ((MessageProcessorBuilder) processor).build(); |
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} |
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else |
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{ |
90 | 0 | return (MessageProcessor) processor; |
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} |
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} |
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public void setName(String name) |
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{ |
96 | 0 | this.name = name; |
97 | 0 | } |
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private InterceptingMessageProcessor createInterceptingMessageProcessor(MessageProcessor processor) |
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{ |
101 | 0 | if (processor instanceof InterceptingMessageProcessor) |
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{ |
103 | 0 | return (InterceptingMessageProcessor) processor; |
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} |
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else |
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{ |
107 | 0 | return new InterceptingMessageProcessorAdapter(processor); |
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} |
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} |
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public InterceptingChainMessageProcessorBuilder chain(MessageProcessor... processors) |
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{ |
113 | 0 | for (MessageProcessor messageProcessor : processors) |
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{ |
115 | 0 | this.processors.add(messageProcessor); |
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} |
117 | 0 | return this; |
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} |
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public InterceptingChainMessageProcessorBuilder chain(List<MessageProcessor> processors) |
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{ |
122 | 0 | if (processors != null) |
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{ |
124 | 0 | this.processors.addAll(processors); |
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} |
126 | 0 | return this; |
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} |
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public InterceptingChainMessageProcessorBuilder chain(MessageProcessorBuilder... builders) |
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{ |
131 | 0 | for (MessageProcessorBuilder messageProcessorBuilder : builders) |
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{ |
133 | 0 | this.processors.add(messageProcessorBuilder); |
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} |
135 | 0 | return this; |
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} |
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public InterceptingChainMessageProcessorBuilder chainBefore(MessageProcessor processor) |
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{ |
140 | 0 | this.processors.add(0, processor); |
141 | 0 | return this; |
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} |
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public InterceptingChainMessageProcessorBuilder chainBefore(MessageProcessorBuilder builder) |
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{ |
146 | 0 | this.processors.add(0, builder); |
147 | 0 | return this; |
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} |
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@Override |
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public String toString() |
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{ |
153 | 0 | if (name != null) |
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{ |
155 | 0 | return "InterceptingChainMessageProcessorBuilder '" + name + "'"; |
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} |
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else |
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{ |
159 | 0 | return super.toString(); |
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} |
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} |
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class InterceptingMessageProcessorAdapter extends AbstractInterceptingMessageProcessor implements Disposable |
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{ |
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private MessageProcessor delegate; |
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public InterceptingMessageProcessorAdapter(MessageProcessor mp) |
168 | 0 | { |
169 | 0 | this.delegate = mp; |
170 | 0 | } |
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
174 | 0 | if (logger.isTraceEnabled()) |
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{ |
176 | 0 | logger.trace("Invoking adapted MessageProcessor '" + delegate.getClass().getName() + "'"); |
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} |
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|
180 | 0 | if (delegate instanceof OutboundEndpoint) |
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{ |
182 | 0 | event = new DefaultMuleEvent(event.getMessage(), (OutboundEndpoint) delegate, |
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event.getSession()); |
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} |
185 | 0 | MuleEvent delegateResult = delegate.process(event); |
186 | 0 | if (delegateResult != null) |
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{ |
188 | 0 | return processNext(delegateResult); |
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} |
190 | 0 | else if (event.getFlowConstruct() instanceof SimpleFlowConstruct) |
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{ |
192 | 0 | return processNext(OptimizedRequestContext.criticalSetEvent(event)); |
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} |
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else |
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{ |
196 | 0 | return null; |
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} |
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} |
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public void setNext(MessageProcessor next) |
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{ |
202 | 0 | this.next = next; |
203 | 0 | } |
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public void dispose() |
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{ |
207 | 0 | this.delegate = null; |
208 | 0 | } |
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@Override |
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public String toString() |
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{ |
213 | 0 | return "InterceptingMessageProcessorAdapter [ target = '" + delegate.getClass().getName() + "' ]"; |
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} |
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} |
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} |