Source Code Cross Referenced for Partitioner.java in  » Workflow-Engines » pegasus-2.1.0 » org » griphyn » cPlanner » partitioner » 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 » org.griphyn.cPlanner.partitioner 
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 org.griphyn.cPlanner.partitioner;
017:
018:        import org.griphyn.cPlanner.common.PegasusProperties;
019:        import org.griphyn.cPlanner.common.LogManager;
020:
021:        import org.griphyn.cPlanner.partitioner.graph.GraphNode;
022:
023:        import java.util.Map;
024:
025:        /**
026:         * The abstract class that lays out the api to do the partitioning of the dax
027:         * into smaller daxes. It defines additional functions to get and set the name
028:         * of the partitions etc.
029:         *
030:         * @author Karan Vahi
031:         * @version $Revision: 50 $
032:         */
033:
034:        public abstract class Partitioner {
035:
036:            /**
037:             * The package name where the implementing classes of this interface reside.
038:             */
039:            public static final String PACKAGE_NAME = "org.griphyn.cPlanner.partitioner";
040:
041:            /**
042:             * The version number associated with this API of Code Generator.
043:             */
044:            public static final String VERSION = "1.2";
045:
046:            /**
047:             * The root node of the graph from where to start the BFS.
048:             */
049:            protected GraphNode mRoot;
050:
051:            /**
052:             * The map containing all the graph nodes. The key to the map are the logical
053:             * id's of the jobs as identified in the dax and the values are the
054:             * corresponding Graph Node objects.
055:             */
056:            protected Map mGraph;
057:
058:            /**
059:             * The handle to the internal logging object.
060:             */
061:            protected LogManager mLogger;
062:
063:            /**
064:             * The object holding all the properties pertaining to Pegasus.
065:             */
066:            protected PegasusProperties mProps;
067:
068:            /**
069:             * The overloaded constructor.
070:             *
071:             * @param root       the dummy root node of the graph.
072:             * @param graph      the map containing all the nodes of the graph keyed by
073:             *                   the logical id of the nodes.
074:             * @param properties the properties passed out to the planner.
075:             */
076:            public Partitioner(GraphNode root, Map graph,
077:                    PegasusProperties properties) {
078:                mRoot = root;
079:                mGraph = graph;
080:                mLogger = LogManager.getInstance();
081:                mProps = properties;
082:                //set a default name to the partition dax
083:                //mPDAXWriter = null;
084:
085:            }
086:
087:            /**
088:             * The main function that ends up traversing the graph structure corrsponding
089:             * to the dax and creates the smaller dax files(one dax file per partition)
090:             * and the .pdax file that illustrates the partition graph. It is recommended
091:             * that the implementing classes use the already initialized handles to the
092:             * DAXWriter and PDAXWriter interfaces to write out the xml files. The
093:             * advantage of using these preinitialized handles is that they already
094:             * are correctly configured for the directories where Pegasus expects the
095:             * submit files and dax files to reside.
096:             *
097:             *
098:             * @param c  the callback object that the partitioner calls out to.
099:             */
100:            public abstract void determinePartitions(Callback c);
101:
102:            /**
103:             * Returns a textual description of the transfer implementation.
104:             *
105:             * @return a short textual description
106:             */
107:            public abstract String description();
108:
109:        }
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