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105 lines
4.0 KiB
105 lines
4.0 KiB
package de.anomic.crawler;
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import java.util.Vector;
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import net.yacy.kelondro.logging.Log;
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public class ImporterManager {
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public final Vector<Importer> finishedJobs;
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public final ThreadGroup runningJobs;
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public int currMaxJobNr;
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public ImporterManager() {
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this.finishedJobs = new Vector<Importer>();
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this.runningJobs = new ThreadGroup("ImporterThreads");
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this.currMaxJobNr = 0;
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}
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public int generateUniqueJobID() {
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int jobID;
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synchronized(this.runningJobs) {
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jobID = this.currMaxJobNr;
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this.currMaxJobNr++;
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}
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return jobID;
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}
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public Importer[] getRunningImporter() {
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final Thread[] importThreads = new Thread[this.runningJobs.activeCount()*2];
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final int activeCount = this.runningJobs.enumerate(importThreads);
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final Importer[] importers = new Importer[activeCount];
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for (int i = 0; i < activeCount; i++) {
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importers[i] = (Importer) importThreads[i];
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}
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return importers;
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}
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public Importer[] getFinishedImporter() {
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return this.finishedJobs.toArray(new Importer[this.finishedJobs.size()]);
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}
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public Importer getImporterByID(final int jobID) {
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final Thread[] importThreads = new Thread[this.runningJobs.activeCount()*2];
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for(final Thread importThread : importThreads) {
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final Importer currThread = (Importer) importThread;
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if (currThread.getJobID() == jobID) {
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return currThread;
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}
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}
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return null;
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}
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/**
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* Can be used to close all still running importer threads
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* e.g. on server shutdown
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*/
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public void close() {
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/* clear the finished thread list */
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this.finishedJobs.clear();
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/* waiting for all threads to finish */
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int threadCount = this.runningJobs.activeCount();
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final Thread[] threadList = new Thread[threadCount];
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threadCount = this.runningJobs.enumerate(threadList);
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if (threadCount == 0) return;
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final Log log = new Log("DB-IMPORT");
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try {
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// trying to gracefull stop all still running sessions ...
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log.logInfo("Signaling shutdown to " + threadCount + " remaining dbImporter threads ...");
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for (final Thread currentThread : threadList) {
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if (currentThread.isAlive()) {
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((Importer)currentThread).stopIt();
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}
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}
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// waiting a few ms for the session objects to continue processing
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try { Thread.sleep(500); } catch (final InterruptedException ex) {}
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// interrupting all still running or pooled threads ...
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log.logInfo("Sending interruption signal to " + runningJobs.activeCount() + " remaining dbImporter threads ...");
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runningJobs.interrupt();
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// we need to use a timeout here because of missing interruptable session threads ...
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if (log.isFine()) log.logFine("Waiting for " + runningJobs.activeCount() + " remaining dbImporter threads to finish shutdown ...");
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int currentThreadIdx = 0;
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for (final Thread currentThread : threadList) {
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if (currentThread.isAlive()) {
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if (log.isFine()) log.logFine("Waiting for dbImporter thread '" + currentThread.getName() + "' [" + currentThreadIdx++ + "] to finish shutdown.");
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try { currentThread.join(500); } catch (final InterruptedException ex) {}
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}
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}
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log.logInfo("Shutdown of remaining dbImporter threads finished.");
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} catch (final Exception e) {
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log.logSevere("Unexpected error while trying to shutdown all remaining dbImporter threads.",e);
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}
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}
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}
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