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package org.mule.source; |
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import org.mule.DefaultMuleEvent; |
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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.endpoint.OutboundEndpoint; |
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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.LifecycleException; |
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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.source.CompositeMessageSource; |
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import org.mule.api.source.MessageSource; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.util.ObjectUtils; |
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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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import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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51 | 0 | public class StartableCompositeMessageSource |
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implements CompositeMessageSource, Lifecycle, FlowConstructAware |
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{ |
54 | 0 | protected static final Log log = LogFactory.getLog(StartableCompositeMessageSource.class); |
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|
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protected MessageProcessor listener; |
57 | 0 | protected AtomicBoolean initialised = new AtomicBoolean(false); |
58 | 0 | protected AtomicBoolean started = new AtomicBoolean(false); |
59 | 0 | protected final List<MessageSource> sources = Collections.synchronizedList(new ArrayList<MessageSource>()); |
60 | 0 | protected AtomicBoolean starting = new AtomicBoolean(false); |
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protected FlowConstruct flowConstruct; |
62 | 0 | private final MessageProcessor internalListener = new InternalMessageProcessor(); |
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|
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public void addSource(MessageSource source) throws MuleException |
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{ |
66 | 0 | synchronized (sources) |
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{ |
68 | 0 | sources.add(source); |
69 | 0 | } |
70 | 0 | source.setListener(internalListener); |
71 | 0 | if (initialised.get()) |
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{ |
73 | 0 | if (source instanceof FlowConstructAware) |
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{ |
75 | 0 | ((FlowConstructAware) source).setFlowConstruct(flowConstruct); |
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} |
77 | 0 | if (source instanceof Initialisable) |
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{ |
79 | 0 | ((Initialisable) source).initialise(); |
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} |
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} |
82 | 0 | if (started.get() && source instanceof Startable) |
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{ |
84 | 0 | ((Startable) source).start(); |
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} |
86 | 0 | } |
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|
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public void removeSource(MessageSource source) throws MuleException |
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{ |
90 | 0 | if (started.get()) |
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{ |
92 | 0 | if (source instanceof Stoppable) |
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{ |
94 | 0 | ((Stoppable) source).stop(); |
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} |
96 | 0 | if (source instanceof Disposable) |
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{ |
98 | 0 | ((Disposable) source).dispose(); |
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} |
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} |
101 | 0 | synchronized (sources) |
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{ |
103 | 0 | sources.remove(source); |
104 | 0 | } |
105 | 0 | } |
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|
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public void setMessageSources(List<MessageSource> sources) throws MuleException |
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{ |
109 | 0 | this.sources.clear(); |
110 | 0 | for (MessageSource messageSource : sources) |
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{ |
112 | 0 | addSource(messageSource); |
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} |
114 | 0 | } |
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|
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public void initialise() throws InitialisationException |
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{ |
118 | 0 | if (listener == null) |
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{ |
120 | 0 | throw new InitialisationException(CoreMessages.objectIsNull("listener"), this); |
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} |
122 | 0 | synchronized (sources) |
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{ |
124 | 0 | for (MessageSource source : sources) |
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{ |
126 | 0 | if (source instanceof FlowConstructAware) |
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{ |
128 | 0 | ((FlowConstructAware) source).setFlowConstruct(flowConstruct); |
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} |
130 | 0 | if (source instanceof Initialisable) |
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{ |
132 | 0 | ((Initialisable) source).initialise(); |
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} |
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} |
135 | 0 | } |
136 | 0 | initialised.set(true); |
137 | 0 | } |
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|
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public void start() throws MuleException |
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{ |
141 | 0 | if (listener == null) |
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{ |
143 | 0 | throw new LifecycleException(CoreMessages.objectIsNull("listener"), this); |
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} |
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|
146 | 0 | synchronized (sources) |
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{ |
148 | 0 | starting.set(true); |
149 | 0 | for (MessageSource source : sources) |
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{ |
151 | 0 | if (source instanceof Startable) |
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{ |
153 | 0 | ((Startable) source).start(); |
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} |
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} |
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|
157 | 0 | started.set(true); |
158 | 0 | starting.set(false); |
159 | 0 | } |
160 | 0 | } |
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|
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public void stop() throws MuleException |
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{ |
164 | 0 | synchronized (sources) |
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{ |
166 | 0 | for (MessageSource source : sources) |
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{ |
168 | 0 | if (source instanceof Stoppable) |
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{ |
170 | 0 | ((Stoppable) source).stop(); |
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} |
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} |
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|
174 | 0 | started.set(false); |
175 | 0 | } |
176 | 0 | } |
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|
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public void dispose() |
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{ |
180 | 0 | synchronized (sources) |
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{ |
182 | 0 | for (MessageSource source : sources) |
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{ |
184 | 0 | if (source instanceof Disposable) |
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{ |
186 | 0 | ((Disposable) source).dispose(); |
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} |
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} |
189 | 0 | } |
190 | 0 | } |
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|
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public void setListener(MessageProcessor listener) |
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{ |
194 | 0 | this.listener = listener; |
195 | 0 | } |
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|
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public void setFlowConstruct(FlowConstruct pattern) |
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{ |
199 | 0 | this.flowConstruct = pattern; |
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|
201 | 0 | } |
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|
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@Override |
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public String toString() |
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{ |
206 | 0 | return String.format("%s [listener=%s, sources=%s, started=%s]", getClass().getSimpleName(), |
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listener, sources, started); |
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} |
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|
210 | 0 | private class InternalMessageProcessor implements MessageProcessor |
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{ |
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public InternalMessageProcessor() |
213 | 0 | { |
214 | 0 | super(); |
215 | 0 | } |
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|
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public MuleEvent process(MuleEvent event) throws MuleException |
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{ |
219 | 0 | if (started.get() || starting.get()) |
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{ |
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|
222 | 0 | if (listener instanceof OutboundEndpoint) |
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{ |
224 | 0 | event = new DefaultMuleEvent(event.getMessage(), (OutboundEndpoint) listener, event.getSession()); |
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} |
226 | 0 | return listener.process(event); |
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} |
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else |
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{ |
230 | 0 | log.warn(String.format( |
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"A message was receieved from MessageSource, but message source is stopped. Message will be discarded.%n" |
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+ " Message: %s%n" + " MessageSource:%s", event, this)); |
233 | 0 | return null; |
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} |
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|
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} |
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|
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@Override |
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public String toString() |
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{ |
241 | 0 | return ObjectUtils.toString(this); |
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} |
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} |
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} |