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package org.mule.providers; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.umo.UMOComponent; |
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import org.mule.umo.UMOException; |
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import org.mule.umo.endpoint.UMOEndpoint; |
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import org.mule.umo.lifecycle.InitialisationException; |
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import org.mule.umo.provider.UMOConnector; |
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import org.mule.util.ObjectUtils; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.List; |
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import edu.emory.mathcs.backport.java.util.concurrent.Future; |
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import edu.emory.mathcs.backport.java.util.concurrent.RejectedExecutionException; |
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import edu.emory.mathcs.backport.java.util.concurrent.ScheduledExecutorService; |
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import edu.emory.mathcs.backport.java.util.concurrent.ScheduledFuture; |
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import edu.emory.mathcs.backport.java.util.concurrent.TimeUnit; |
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public abstract class AbstractPollingMessageReceiver extends AbstractMessageReceiver |
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{ |
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public static final long DEFAULT_POLL_FREQUENCY = 1000; |
40 | 0 | public static final TimeUnit DEFAULT_POLL_TIMEUNIT = TimeUnit.MILLISECONDS; |
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public static final long DEFAULT_STARTUP_DELAY = 1000; |
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44 | 0 | private long frequency = DEFAULT_POLL_FREQUENCY; |
45 | 0 | private TimeUnit timeUnit = DEFAULT_POLL_TIMEUNIT; |
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48 | 0 | protected final List schedules = new LinkedList(); |
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public AbstractPollingMessageReceiver(UMOConnector connector, |
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UMOComponent component, |
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final UMOEndpoint endpoint) throws InitialisationException |
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{ |
54 | 0 | super(connector, component, endpoint); |
55 | 0 | } |
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protected void doStart() throws UMOException |
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{ |
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try |
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{ |
61 | 0 | this.schedule(); |
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} |
63 | 0 | catch (Exception ex) |
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{ |
65 | 0 | this.stop(); |
66 | 0 | throw new InitialisationException(CoreMessages.failedToScheduleWork(), ex, this); |
67 | 0 | } |
68 | 0 | } |
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protected void doStop() throws UMOException |
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{ |
72 | 0 | this.unschedule(); |
73 | 0 | } |
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protected void schedule() |
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throws RejectedExecutionException, NullPointerException, IllegalArgumentException |
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{ |
88 | 0 | synchronized (schedules) |
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{ |
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|
94 | 0 | ScheduledFuture schedule = connector.getScheduler().scheduleWithFixedDelay( |
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new PollingReceiverWorkerSchedule(this.createWork()), DEFAULT_STARTUP_DELAY, |
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this.getFrequency(), this.getTimeUnit()); |
97 | 0 | schedules.add(schedule); |
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99 | 0 | if (logger.isDebugEnabled()) |
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{ |
101 | 0 | logger.debug(ObjectUtils.identityToShortString(this) + " scheduled " |
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+ ObjectUtils.identityToShortString(schedule) + " with " + frequency |
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+ " " + getTimeUnit() + " polling frequency"); |
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} |
105 | 0 | } |
106 | 0 | } |
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protected void unschedule() |
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{ |
115 | 0 | synchronized (schedules) |
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{ |
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118 | 0 | for (Iterator i = schedules.iterator(); i.hasNext();) |
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{ |
120 | 0 | ScheduledFuture schedule = (ScheduledFuture)i.next(); |
121 | 0 | schedule.cancel(false); |
122 | 0 | i.remove(); |
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|
124 | 0 | if (logger.isDebugEnabled()) |
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{ |
126 | 0 | logger.debug(ObjectUtils.identityToShortString(this) + " cancelled polling schedule: " |
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+ ObjectUtils.identityToShortString(schedule)); |
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} |
129 | 0 | } |
130 | 0 | } |
131 | 0 | } |
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protected PollingReceiverWorker createWork() |
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{ |
135 | 0 | return new PollingReceiverWorker(this); |
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} |
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public long getFrequency() |
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{ |
140 | 0 | return frequency; |
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} |
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public void setFrequency(long value) |
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{ |
147 | 0 | if (value <= 0) |
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{ |
149 | 0 | frequency = DEFAULT_POLL_FREQUENCY; |
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} |
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else |
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{ |
153 | 0 | frequency = value; |
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} |
155 | 0 | } |
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public TimeUnit getTimeUnit() |
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{ |
159 | 0 | return timeUnit; |
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} |
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public void setTimeUnit(TimeUnit timeUnit) |
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{ |
164 | 0 | this.timeUnit = timeUnit; |
165 | 0 | } |
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public abstract void poll() throws Exception; |
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} |