/* * 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 */import gridsim.GridSim;import gridsim.IO_data;import gridsim.ParameterException;import gridsim.datagrid.DataGridUser;import gridsim.datagrid.File;import gridsim.net.SimpleLink;import java.util.ArrayList;/** * This is an implementation of a user which performs a set of file managing * operations on the Data Grid. * * @author Uros Cibej and Anthony Sulistio */class FileUser extends DataGridUser {    private String name_;   // user name    // Constructor    FileUser(String name, double baud_rate, double delay, int MTU)            throws Exception {        super(name, new SimpleLink(name + "_link", baud_rate, delay, MTU));        this.name_ = name;        // Gets an ID for this entity        int userID = super.getEntityId(name);        System.out.println("Creating a grid user entity with name = " + name                + ", and id = " + userID);    }    /**     * The core method that handles communications among GridSim entities.     */    public void body() {        experiment(); // execute a set of demands        // shut down I/O ports        shutdownUserEntity();        terminateIOEntities();        System.out.println(this.name_ + ":%%%% Exiting body() at time "                + GridSim.clock());    }    private void experiment() {        // wait for all entities to register        super.gridSimHold(50.0);        int location = 0;        // create three new files and add them as master files to resource Res_2        try {            ArrayList fList = new ArrayList();            for (int i = 0; i < 3; i++) {                File fNew = new File("file_" + i, 10);                addMaster(fNew, GridSim.getEntityId("Res_2"));            }        } catch (ParameterException e) {            e.printStackTrace();        }        // get the full name of file1, i.e. file1+ID, where ID is a unique        // number assigned to the file by the top replica catalogue.        String name = getFullFilename("file_0");        File f = null;        int fileLocation;        if (name != null) {            // get the location of the file            location = this.getReplicaLocation(name);            if (location != -1) {                // transfer the file                f = this.getFile(name, location);                System.out.println("user:" + this.get_name()                        + ":-Transfer of file " + name + " succesful");            }        }        // replicate this file to Res_0        replicateFile(f, GridSim.getEntityId("Res_0"));        // replicate this file to Res_1        replicateFile(f, GridSim.getEntityId("Res_1"));        // delete replica of file from Res_0        deleteFile(f.getName(), GridSim.getEntityId("Res_0"));        // trying to delete a master file will not succeed        // for deleting the master file one should use deleteMaster()        deleteFile(f.getName(), GridSim.getEntityId("Res_2"));        // but a master file cannot be deleted while there are replicas of the        // file on the Data Grid, so the following will also produce an error        deleteMaster(f.getName(), GridSim.getEntityId("Res_2"));        // so we first have to delete the replica of file from Res_1        deleteFile(f.getName(), GridSim.getEntityId("Res_1"));        // and then we can delete the master file        deleteMaster(f.getName(), GridSim.getEntityId("Res_2"));    }} // end class