Source Code Cross Referenced for ClockTest.java in  » Science » Cougaar12_4 » org » cougaar » mlm » examples » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.mlm.examples 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * <copyright>
003:         *  
004:         *  Copyright 1997-2004 BBNT Solutions, LLC
005:         *  under sponsorship of the Defense Advanced Research Projects
006:         *  Agency (DARPA).
007:         * 
008:         *  You can redistribute this software and/or modify it under the
009:         *  terms of the Cougaar Open Source License as published on the
010:         *  Cougaar Open Source Website (www.cougaar.org).
011:         * 
012:         *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
013:         *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
014:         *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
015:         *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
016:         *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
017:         *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
018:         *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
019:         *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
020:         *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
021:         *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
022:         *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
023:         *  
024:         * </copyright>
025:         */
026:
027:        package org.cougaar.mlm.examples;
028:
029:        import java.util.Date;
030:        import java.util.Vector;
031:
032:        import org.cougaar.core.mts.MessageAddress;
033:        import org.cougaar.planning.ldm.ClusterServesPlugin;
034:        import org.cougaar.planning.plugin.legacy.SimplePlugin;
035:
036:        /** 
037:         * this plugin is a point-test for (demo-time) clock advance functionality.
038:         * It can do two things:
039:         *  1. when it is passed an argument, it is a clock setter, advancing the
040:         *  COUGAAR time by 10 minutes every 10 (realtime) seconds.
041:         *  2. otherwise it sets wake timers 30 minutes in advance of the current
042:         *  time each time it is waked, reporting on the current time each time 
043:         *  around.
044:         *
045:         * So, it shows examples of:
046:         *  1. how to set the society time (be careful!)
047:         *  2. how to look at the society time.
048:         *  3. how to request that your plugin be activated approximately at a
049:         *    specific scenario time (or after scenario time has elapsed).
050:         *  4. how to code a timer based on real (system) time.
051:         *  
052:         * to try it out:
053:         * One cluster ini file should have the following line (for the advancer)
054:         *   plugin = org.cougaar.mlm.examples.ClockTest(advance)
055:         * another cluster should have (for the watcher):
056:         *   plugin = org.cougaar.mlm.examples.ClockTest
057:         **/
058:
059:        public class ClockTest extends SimplePlugin {
060:            ClusterServesPlugin cluster = null;
061:            MessageAddress cid = null;
062:
063:            public ClockTest() {
064:                setThreadingChoice(SINGLE_THREAD);
065:            }
066:
067:            // "initialization" method
068:            public void setupSubscriptions() {
069:                cluster = getCluster();
070:                cid = getMessageAddress();
071:
072:                System.err.println("ClockTest at " + cid + " initializing.");
073:                // see if we are a supposed to be a setter
074:                Vector argv = getParameters();
075:                if (argv != null && argv.size() > 0) {
076:                    startAdvancer();
077:                } else {
078:                    // set up a waker
079:                    nextWake();
080:                }
081:
082:                // don't actually set up any subscriptions
083:            }
084:
085:            public void execute() {
086:                System.err.println("ClockTest at " + cid + " executing at "
087:                        + new Date(currentTimeMillis()));
088:                nextWake();
089:            }
090:
091:            private void nextWake() {
092:                long ms = currentTimeMillis() + (30 * 60 * 1000); // wake in 30 minutes
093:
094:                System.err.println("ClockTest at " + cid + " will wake at "
095:                        + new Date(ms));
096:                wakeAt(ms);
097:            }
098:
099:            private void startAdvancer() {
100:                System.err
101:                        .println("ClockTest at " + cid + " starting advancer");
102:
103:                Thread t = new Thread(new Advancer());
104:                t.start();
105:            }
106:
107:            private class Advancer implements  Runnable {
108:                public void run() {
109:                    while (true) {
110:
111:                        // sleep for 10 seconds
112:                        try {
113:                            synchronized (this ) {
114:                                this .wait(10 * 1000);
115:                            }
116:                        } catch (InterruptedException ie) {
117:                        }
118:
119:                        // advance the clock by 10 minutes
120:
121:                        // Note - we can do this directly (without a transaction)
122:                        // because time is not LDM controlled.
123:                        System.err
124:                                .println("ClockTest at "
125:                                        + cid
126:                                        + " Advancing to "
127:                                        + new Date(
128:                                                currentTimeMillis() + 10 * 60 * 1000));
129:                        cluster.advanceTime(10 * 60 * 1000);
130:
131:                        // if we were using this loop to *activate* the plugin
132:                        // every 10 (realtime) seconds, we'd do something like:
133:                        // plugin.wake();
134:                    }
135:                }
136:            }
137:        }
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