regionalrc.java

来自「中間件開發详细说明：清华大学J2EE教程讲义（ppt）-Tsinghua Uni」· Java 代码 · 共 52 行

/*
 * Title:        GridSim Toolkit
 * Description:  GridSim (Grid Simulation) Toolkit for Modeling and Simulation
 *               of Parallel and Distributed Systems such as Clusters and Grids
 * Licence:      GPL - http://www.gnu.org/copyleft/gpl.html
 */
package gridsim.datagrid.index;

import java.util.*;
import eduni.simjava.*;
import gridsim.datagrid.*;
import gridsim.net.Link;
import gridsim.*;
import gridsim.datagrid.filter.Filter;


/**
 * This class acts as a local RC and/or a leaf RC in a hierarchical model.
 * It is responsible for processing queries from users and resources.<br>
 * NOTE: Generating a unique ID for each file name is done by the
 *       {@link gridsim.datagrid.index.TopRegionalRC} entity only.
 *
 * @author  Uros Cibej and Anthony Sulistio
 * @since   GridSim Toolkit 4.0
 * @see gridsim.datagrid.index.TopRegionalRC
 */
public class RegionalRC extends AbstractRC
{
    private Hashtable catalogueHash_; // Stores information about file locations
    private Hashtable attrHash_;      // Stores the attributes of files
    private int higherRC_;            // id of the higher level RC
    private Integer senderID_;        // id of the sender: this ID or res ID

    // List of requests that are still waiting for confirmation from higher
    // level RC
    private ArrayList waitingMasterRegistration_;   // for registration
    private ArrayList waitingMasterDeletes_;        // for de-registration
    private ArrayList waitingReplicaAddAck_;
    private ArrayList waitingReplicaDeleteAck_;
    private ArrayList waitingReplicaRequest_;


    // -----------------INITIALIZATION--------------------------------
    /**
     * Creates a new <b>local</b> Replica Catalogue (RC) entity.
     * This constructor should be used if you want this RC entity to be inside
     * a resource's domain, hence known as <i>a Local RC</i>.
     * As a consequence, this entity uses the resource ID and I/O port for
     * indentification.
     * <br>
     * The Local RC is responsible for indexing available files on the
     * resource only. It also handles users