Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/wsplgen/Scheduler.java @ 9726:0a5239a1e46e 3.2.x

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Upgrade to Log4j 2
author Tom Gottfried <tom@intevation.de>
date Wed, 02 Mar 2022 10:26:50 +0100
parents e4606eae8ea5
children
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.wsplgen;
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11 import java.util.HashMap;
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12 import java.util.Map;
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13 import java.util.concurrent.Future;
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14 import java.util.concurrent.ScheduledThreadPoolExecutor;
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15
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16 import org.apache.logging.log4j.Logger;
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17 import org.apache.logging.log4j.LogManager;
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18
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19 import org.dive4elements.artifacts.CallContext;
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20 import org.dive4elements.river.artifacts.model.map.WSPLGENJob;
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21
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22
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23 /**
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24 * The Scheduler is used to retrieve new WSPLGENJob. The incoming jobs are added
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25 * to a ScheduledThreadPoolExecutor. This thread pool has a number of worker
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26 * threads that processes the WSPLGENJobs. The number of worker threads can be
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27 * set using a System property <i>wsplgen.max.threads</i> ; its default value is
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28 * 1.
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29 *
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30 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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31 */
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32 public class Scheduler {
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33
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34 private class FutureJob {
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35 public Future future;
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36 public WSPLGENJob job;
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37
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38 public FutureJob(Future future, WSPLGENJob job) {
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39 this.future = future;
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40 this.job = job;
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41 }
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42 }
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43
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44 public static final int MAX_WSPLGEN_PROCESSES =
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45 Integer.getInteger("wsplgen.max.threads", 1);
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47
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48 protected ScheduledThreadPoolExecutor pool;
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49 protected Map<String, FutureJob> jobs;
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52 private static Scheduler INSTANCE;
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53
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54 private static final Logger log = LogManager.getLogger(Scheduler.class);
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58 private Scheduler() {
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59 jobs = new HashMap<String, FutureJob>();
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60 pool = new ScheduledThreadPoolExecutor(MAX_WSPLGEN_PROCESSES);
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61 }
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64 public static Scheduler getInstance() {
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65 if (INSTANCE == null) {
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66 log.info("Create new WSPLGEN Scheduler...");
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67
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68 INSTANCE = new Scheduler();
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69 }
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70
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71 return INSTANCE;
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72 }
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73
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74
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75 public void addJob(final WSPLGENJob job) {
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76 synchronized (jobs) {
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77 WSPLGENFuture f = new WSPLGENFuture(new WSPLGENCallable(this, job));
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78 pool.execute(f);
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79
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80 jobs.put(job.getArtifact().identifier(), new FutureJob(f, job));
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81
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82 log.info("New WSPLGEN job successfully added.");
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83 }
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84 }
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85
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86
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87 /**
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88 * Cancels a running (or queued) job.
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89 *
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90 * @param jobId The id of the job (which is the identifier of an Artifact).
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91 */
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92 public void cancelJob(String jobId) {
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93 log.debug("Search job in queue: " + jobId);
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94
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95 synchronized (jobs) {
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96 FutureJob fj = jobs.get(jobId);
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97
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98 if (fj != null) {
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99 log.info("Try to cancel job: " + jobId);
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100
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101 fj.future.cancel(true);
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102
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103 removeJob(jobId);
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104
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105 fj.job.getCallContext().afterBackground(
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106 CallContext.STORE);
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107
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108 log.info("Canceled job: " + jobId);
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109 }
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110 }
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111 }
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112
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113
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114 protected void removeJob(String id) {
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115 synchronized (jobs) {
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116 jobs.remove(id);
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117 }
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118 }
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119 }
6b9877a9f6c1 Added infrastructure to start WSPLGEN calculations - the FloodMapState already start such calculations.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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120 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org