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package org.mule.processor.chain; |
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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.construct.FlowConstruct; |
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import org.mule.api.construct.FlowConstructAware; |
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import org.mule.api.context.MuleContextAware; |
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import org.mule.api.lifecycle.Disposable; |
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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.Startable; |
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import org.mule.api.lifecycle.Stoppable; |
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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.processor.policy.AroundPolicy; |
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import org.mule.api.processor.policy.Policies; |
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import org.mule.api.processor.policy.PolicyInvocation; |
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import org.mule.processor.AbstractInterceptingMessageProcessor; |
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import org.mule.util.StringUtils; |
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import java.util.Iterator; |
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import java.util.List; |
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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 AbstractMessageProcessorChain extends AbstractInterceptingMessageProcessor |
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implements MessageProcessorChain, Lifecycle, FlowConstructAware, MuleContextAware |
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{ |
47 | 0 | protected final transient Log log = LogFactory.getLog(getClass()); |
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protected String name; |
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protected List<MessageProcessor> processors; |
50 | 0 | private final Policies policies = new Policies(this); |
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|
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public AbstractMessageProcessorChain(String name, List<MessageProcessor> processors) |
53 | 0 | { |
54 | 0 | this.name = name; |
55 | 0 | this.processors = processors; |
56 | 0 | } |
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|
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
60 | 0 | if (log.isDebugEnabled()) |
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{ |
62 | 0 | log.debug(String.format("Invoking %s with event %s", this, event)); |
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} |
64 | 0 | if (event == null) |
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{ |
66 | 0 | return null; |
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} |
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|
69 | 0 | final List<AroundPolicy> activePolicies = policies.list(); |
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MuleEvent result; |
71 | 0 | if (!activePolicies.isEmpty()) |
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{ |
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|
77 | 0 | PolicyInvocation invocation = new PolicyInvocation(event, activePolicies, new MessageProcessor() |
78 | 0 | { |
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
81 | 0 | return doProcess(event); |
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} |
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}); |
84 | 0 | final AroundPolicy entryPoint = activePolicies.get(0); |
85 | 0 | result = entryPoint.invoke(invocation); |
86 | 0 | } |
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else |
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{ |
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|
90 | 0 | result = doProcess(event); |
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} |
92 | 0 | return processNext(result); |
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} |
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|
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protected abstract MuleEvent doProcess(MuleEvent event) throws MuleException; |
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|
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public void initialise() throws InitialisationException |
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{ |
99 | 0 | for (MessageProcessor processor : processors) |
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{ |
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|
102 | 0 | if (processor instanceof Initialisable ) |
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{ |
104 | 0 | ((Initialisable) processor).initialise(); |
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} |
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} |
107 | 0 | } |
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|
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public void start() throws MuleException |
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{ |
111 | 0 | for (MessageProcessor processor : processors) |
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{ |
113 | 0 | if (processor instanceof Startable) |
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{ |
115 | 0 | ((Startable) processor).start(); |
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} |
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} |
118 | 0 | } |
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public void stop() throws MuleException |
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{ |
122 | 0 | for (MessageProcessor processor : processors) |
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{ |
124 | 0 | if (processor instanceof Stoppable) |
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{ |
126 | 0 | ((Stoppable) processor).stop(); |
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} |
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} |
129 | 0 | } |
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|
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public void dispose() |
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{ |
133 | 0 | for (MessageProcessor processor : processors) |
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{ |
135 | 0 | if (processor instanceof Disposable) |
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{ |
137 | 0 | ((Disposable) processor).dispose(); |
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} |
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} |
140 | 0 | processors.clear(); |
141 | 0 | } |
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|
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public void setFlowConstruct(FlowConstruct flowConstruct) |
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{ |
145 | 0 | for (MessageProcessor processor : processors) |
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{ |
147 | 0 | if (processor instanceof FlowConstructAware) |
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{ |
149 | 0 | ((FlowConstructAware) processor).setFlowConstruct(flowConstruct); |
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} |
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} |
152 | 0 | } |
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public void setMuleContext(MuleContext context) |
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{ |
156 | 0 | for (MessageProcessor processor : processors) |
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{ |
158 | 0 | if (processor instanceof MuleContextAware) |
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{ |
160 | 0 | ((MuleContextAware) processor).setMuleContext(context); |
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} |
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} |
163 | 0 | } |
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public String getName() |
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{ |
167 | 0 | return name; |
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} |
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|
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@Override |
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public String toString() |
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{ |
173 | 0 | StringBuilder string = new StringBuilder(); |
174 | 0 | string.append(getClass().getSimpleName()); |
175 | 0 | if (StringUtils.isNotBlank(name)) |
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{ |
177 | 0 | string.append(String.format(" '%s' ", name)); |
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} |
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|
180 | 0 | Iterator<MessageProcessor> mpIterator = processors.iterator(); |
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|
182 | 0 | final String nl = String.format("%n"); |
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|
184 | 0 | for (AroundPolicy policy : policies.list()) |
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{ |
186 | 0 | string.append(String.format("%n -- policy [%s]: %s", policy.getName(), policy)); |
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} |
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|
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|
190 | 0 | if (mpIterator.hasNext()) |
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{ |
192 | 0 | string.append(String.format("%n[ ")); |
193 | 0 | while (mpIterator.hasNext()) |
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{ |
195 | 0 | MessageProcessor mp = mpIterator.next(); |
196 | 0 | final String indented = StringUtils.replace(mp.toString(), nl, String.format("%n ")); |
197 | 0 | string.append(String.format("%n %s", indented)); |
198 | 0 | if (mpIterator.hasNext()) |
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{ |
200 | 0 | string.append(", "); |
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} |
202 | 0 | } |
203 | 0 | string.append(String.format("%n]")); |
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} |
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|
206 | 0 | return string.toString(); |
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} |
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public List<MessageProcessor> getMessageProcessors() |
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{ |
211 | 0 | return processors; |
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} |
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public Policies getPolicies() |
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{ |
216 | 0 | return policies; |
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} |
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} |