Source Code Cross Referenced for Rank.java in  » Workflow-Engines » pegasus-2.1.0 » edu » isi » pegasus » planner » ranking » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » pegasus 2.1.0 » edu.isi.pegasus.planner.ranking 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file or a portion of this file is licensed under the terms of
003:         * the Globus Toolkit Public License, found in file GTPL, or at
004:         * http://www.globus.org/toolkit/download/license.html. This notice must
005:         * appear in redistributions of this file, with or without modification.
006:         *
007:         * Redistributions of this Software, with or without modification, must
008:         * reproduce the GTPL in: (1) the Software, or (2) the Documentation or
009:         * some other similar material which is provided with the Software (if
010:         * any).
011:         *
012:         * Copyright 1999-2004 University of Chicago and The University of
013:         * Southern California. All rights reserved.
014:         */
015:
016:        package edu.isi.pegasus.planner.ranking;
017:
018:        import org.griphyn.cPlanner.classes.PegasusBag;
019:
020:        import org.griphyn.cPlanner.selector.site.heft.Algorithm;
021:
022:        import org.griphyn.cPlanner.classes.ADag;
023:
024:        import org.griphyn.cPlanner.common.LogManager;
025:
026:        import org.griphyn.cPlanner.parser.DaxParser;
027:
028:        import org.griphyn.cPlanner.parser.dax.DAXCallbackFactory;
029:        import org.griphyn.cPlanner.parser.dax.Callback;
030:
031:        import java.util.Collection;
032:        import java.util.Collections;
033:        import java.util.Iterator;
034:        import java.util.List;
035:        import java.util.LinkedList;
036:
037:        /**
038:         * The Rank class that ranks the DAX'es
039:         *
040:         * @author Karan Vahi
041:         * @version $Revision: 445 $
042:         */
043:        public class Rank {
044:
045:            /**
046:             * The handle to the ranking algorithm.
047:             */
048:            private Algorithm mHeft;
049:
050:            /**
051:             * The pegasus bag.
052:             */
053:            private PegasusBag mBag;
054:
055:            /**
056:             * The list of candidate grid sites.
057:             */
058:            private List mSites;
059:
060:            /**
061:             * The optional request id.
062:             */
063:            private String mRequestID;
064:
065:            /**
066:             * The handle to the logging object.
067:             */
068:            private LogManager mLogger;
069:
070:            /**
071:             * The default constructor.
072:             */
073:            public Rank() {
074:                mLogger = LogManager.getInstance();
075:            }
076:
077:            /**
078:             * Initializes the rank client.
079:             *
080:             * @param bag   the PegasusBag.
081:             * @param sites the sites where the wf can run potentially.
082:             * @param id    the request id
083:             */
084:            public void initialize(PegasusBag bag, List sites, String id) {
085:                mBag = bag;
086:                mLogger = bag.getLogger();
087:                mHeft = new Algorithm(bag);
088:                mRequestID = id;
089:                mSites = sites;
090:            }
091:
092:            /**
093:             * Ranks the daxes, and returns a sort collection of Ranking objects.
094:             *
095:             * @param daxes Collection
096:             *
097:             * @return a sorted collection according to the ranks.
098:             */
099:            public Collection<Ranking> rank(Collection<String> daxes) {
100:
101:                Collection result = new LinkedList();
102:
103:                long max = 0;
104:
105:                //traverse through the DAX'es
106:                long rank;
107:                for (Iterator it = daxes.iterator(); it.hasNext();) {
108:                    String dax = (String) it.next();
109:                    Callback cb = DAXCallbackFactory.loadInstance(mBag
110:                            .getPegasusProperties(), dax, "DAX2CDAG");
111:
112:                    mLogger.log("Ranking dax " + dax,
113:                            LogManager.DEBUG_MESSAGE_LEVEL);
114:                    DaxParser daxParser = new DaxParser(dax, mBag
115:                            .getPegasusProperties(), cb);
116:
117:                    ADag dag = (ADag) cb.getConstructedObject();
118:                    dag.setRequestID(mRequestID);
119:                    mHeft.schedule(dag, mSites);
120:                    rank = mHeft.getMakespan();
121:                    max = (rank > max) ? rank : max;
122:                    result.add(new Ranking(dax, rank));
123:                }
124:
125:                //update the ranks for all the daxes ( inverse them )
126:                for (Iterator it = result.iterator(); it.hasNext();) {
127:                    Ranking r = (Ranking) it.next();
128:                    //inverse the ranking
129:                    r.setRank(max - r.getRank());
130:                }
131:
132:                Collections.sort((List) result, Collections.reverseOrder());
133:                return result;
134:            }
135:
136:        }
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