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package net.sf.basedb.opengrid.service; |
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import java.net.URI; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import org.slf4j.LoggerFactory; |
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import net.sf.basedb.core.Job; |
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import net.sf.basedb.core.signal.ExtensionSignalTransporter; |
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import net.sf.basedb.core.signal.Signal; |
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import net.sf.basedb.core.signal.SignalHandler; |
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import net.sf.basedb.opengrid.JobIdentifier; |
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import net.sf.basedb.util.extensions.ActionFactory; |
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import net.sf.basedb.util.extensions.InvokationContext; |
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import net.sf.basedb.util.extensions.logging.ExtensionsLog; |
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import net.sf.basedb.util.extensions.logging.ExtensionsLogger; |
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/** |
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Signal handler implementation for Open Grid Scheduler clusters. |
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Jobs that are started on a cluster should be registered in BASE |
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with an external id equal to the job id on the cluster, |
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{@link ExtensionSignalTransporter} as the signal transporter implementation |
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and the URI from {@link #getSignalUri(JobIdentifier)} as the |
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signal transporter parameter. |
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Signal URI:s have the form: |
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ogx://cluster-id/?ABORT,STATUS#job-id |
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|
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where cluster-id is the username, ip-address and port of the cluster. |
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*/ |
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public class OpenGridSignalHandlerFactory |
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implements ActionFactory<SignalHandler> |
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{ |
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|
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/** |
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The ID of the signal handler extension. |
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@since 1.10 |
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*/ |
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public static final String ID = "net.sf.basedb.opengrid.job-signal"; |
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/** |
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All supported signals by this signal handler. |
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*/ |
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public static final Collection<Signal> SUPPORTED_SIGNALS = |
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Collections.unmodifiableList(Arrays.asList(Signal.ABORT, Signal.STATUS)); |
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private static final ExtensionsLogger logger = |
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ExtensionsLog.getLogger(ID, true).wrap(LoggerFactory.getLogger(OpenGridSignalHandlerFactory.class)); |
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/** |
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Generate a signal URI that is used to send signals to a given |
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job on a cluster. |
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@param jobId The job identifier |
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*/ |
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public static String getSignalUri(JobIdentifier jobId) |
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{ |
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StringBuilder uri = new StringBuilder(); |
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uri.append("ogx://"); |
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uri.append(jobId.getClusterId()); |
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uri.append("/?"); |
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String delimiter = ""; |
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for (Signal s : SUPPORTED_SIGNALS) |
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{ |
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uri.append(delimiter); |
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uri.append(s.getId()); |
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delimiter = ","; |
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} |
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uri.append("#"); |
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uri.append(jobId.getClusterJobId()); |
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logger.debug("Created signal URI: " +uri.toString()); |
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return uri.toString(); |
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} |
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|
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public OpenGridSignalHandlerFactory() |
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{} |
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/** |
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If the signal schema is "ogx" this factory should handle it. |
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*/ |
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@Override |
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public boolean prepareContext(InvokationContext<? super SignalHandler> context) |
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{ |
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URI signalURI = (URI)context.getClientContext().getAttribute("signal-uri"); |
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return "ogx".equals(signalURI.getScheme()); |
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} |
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@Override |
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public SignalHandler[] getActions(InvokationContext<? super SignalHandler> context) |
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{ |
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URI signalURI = (URI)context.getClientContext().getAttribute("signal-uri"); |
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Job job = (Job)context.getClientContext().getCurrentItem(); |
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if (logger.isDebugEnabled()) |
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{ |
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logger.debug("Creating signal handler for " + signalURI); |
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} |
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String jobId = signalURI.getUserInfo(); |
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return new SignalHandler[] { new OpenGridSignalHandler(signalURI, job, SUPPORTED_SIGNALS) }; |
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} |
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/** |
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Signal handler implementation. Parameters are retreived from |
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the context by the factory class. |
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*/ |
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static class OpenGridSignalHandler |
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implements SignalHandler |
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{ |
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|
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private final URI signalURI; |
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private final Job job; |
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private final Collection<Signal> supportedSignals; |
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OpenGridSignalHandler(URI signalURI, Job job, Collection<Signal> signals) |
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{ |
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this.signalURI = signalURI; |
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this.job = job; |
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this.supportedSignals = signals; |
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} |
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@Override |
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public Collection<Signal> getSupportedSignals() |
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{ |
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return supportedSignals; |
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} |
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@Override |
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public boolean supports(Signal signal) |
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{ |
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return supportedSignals.contains(signal); |
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} |
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@Override |
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public void handleSignal(Signal signal) |
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{ |
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if (logger.isDebugEnabled()) |
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{ |
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logger.debug("Got signal " + signal.getId() + " for " + signalURI); |
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} |
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if (!supports(signal)) return; |
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|
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JobIdentifier jobId = new JobIdentifier(signalURI.getAuthority(), signalURI.getFragment(), job.getId()); |
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OpenGridService srv = OpenGridService.getInstance(); |
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if (signal == Signal.ABORT) |
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{ |
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srv.asyncJobAbort(jobId); |
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} |
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else if (signal == Signal.STATUS) |
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{ |
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srv.asyncJobStatusUpdate(jobId); |
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} |
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} |
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|
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} |
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|
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} |