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package org.mule.transport; |
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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.InboundEndpoint; |
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import org.mule.api.lifecycle.CreateException; |
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import org.mule.api.transport.Connector; |
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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.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<ScheduledFuture> schedules = new LinkedList<ScheduledFuture>(); |
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public AbstractPollingMessageReceiver(Connector connector, |
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FlowConstruct flowConstruct, |
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final InboundEndpoint endpoint) throws CreateException |
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{ |
54 | 0 | super(connector, flowConstruct, endpoint); |
55 | 0 | } |
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@Override |
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protected void doStart() throws MuleException |
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{ |
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try |
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{ |
62 | 0 | this.schedule(); |
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} |
64 | 0 | catch (Exception ex) |
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{ |
66 | 0 | this.stop(); |
67 | 0 | throw new CreateException(CoreMessages.failedToScheduleWork(), ex, this); |
68 | 0 | } |
69 | 0 | } |
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@Override |
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protected void doStop() throws MuleException |
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{ |
74 | 0 | this.unschedule(); |
75 | 0 | } |
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protected void schedule() |
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throws RejectedExecutionException, NullPointerException, IllegalArgumentException |
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{ |
90 | 0 | synchronized (schedules) |
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{ |
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96 | 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()); |
99 | 0 | schedules.add(schedule); |
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|
101 | 0 | if (logger.isDebugEnabled()) |
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{ |
103 | 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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} |
107 | 0 | } |
108 | 0 | } |
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protected void unschedule() |
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{ |
117 | 0 | synchronized (schedules) |
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{ |
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120 | 0 | for (Iterator<ScheduledFuture> i = schedules.iterator(); i.hasNext();) |
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{ |
122 | 0 | ScheduledFuture schedule = i.next(); |
123 | 0 | schedule.cancel(false); |
124 | 0 | i.remove(); |
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|
126 | 0 | if (logger.isDebugEnabled()) |
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{ |
128 | 0 | logger.debug(ObjectUtils.identityToShortString(this) + " cancelled polling schedule: " |
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+ ObjectUtils.identityToShortString(schedule)); |
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} |
131 | 0 | } |
132 | 0 | } |
133 | 0 | } |
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public void disableNativeScheduling() |
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{ |
137 | 0 | this.unschedule(); |
138 | 0 | } |
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protected PollingReceiverWorker createWork() |
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{ |
142 | 0 | return new PollingReceiverWorker(this); |
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} |
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public long getFrequency() |
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{ |
147 | 0 | return frequency; |
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} |
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public void setFrequency(long value) |
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{ |
154 | 0 | if (value <= 0) |
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{ |
156 | 0 | frequency = DEFAULT_POLL_FREQUENCY; |
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} |
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else |
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{ |
160 | 0 | frequency = value; |
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} |
162 | 0 | } |
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public TimeUnit getTimeUnit() |
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{ |
166 | 0 | return timeUnit; |
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} |
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public void setTimeUnit(TimeUnit timeUnit) |
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{ |
171 | 0 | this.timeUnit = timeUnit; |
172 | 0 | } |
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public abstract void poll() throws Exception; |
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} |