openjmsserver.java

实现了Jms的服务器源码,支持多种适配器,DB,FTP,支持多种数据库

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 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2000 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: OpenJMSServer.java,v 1.3 2003/08/17 01:32:24 tanderson Exp $
 *
 * Date         Author  Changes
 * $Date	    jimm    Created
 */

package org.exolab.jms.jndiadministration;

import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;

import javax.naming.NameClassPair;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;


/**
 * This class controls all dispay characteristics and menus related to an
 * OpenJMS Jndi Server. Currently only add context is supported.
 *
 * @version     $Revision: 1.3 $ $Date: 2003/08/17 01:32:24 $
 * @author      <a href="mailto:[e-mail]">Jim Mourikis</a>
 * @see         OpenJMSContext
 * @see         AdminMgr
 * @see         ObjectDialog
 * @see         OpenJMSObject
 */
public class OpenJMSServer extends DefaultMutableTreeNode {

    // The server name.
    private String serverName_;

    //  A reference to the tree this node belongs to.
    static private JTree tree_ = null;

    // A flag indicating if the menu has been created yet.
    static private boolean commandsCreated_ = false;

    // The popup menu for all contexts
    static private JPopupMenu commands_ = null;

    /**
     * The OpenJMS server connection. Currently there is only one
     * OpenJMSServer connection at a time.
     *
     * @param serverName The name of this server
     * @param tree The parent tree this root node belongs to.
     *
     */
    public OpenJMSServer(String serverName, JTree tree) {
        serverName_ = serverName;
        if (!commandsCreated_) {
            tree_ = tree;
            createCommands();
            commandsCreated_ = true;
        }
    }


    /**
     * Create the menu for all servers and set up the Action events for
     * each menu item. Since menus are shared, the callbacks called are
     * static. Once a menu is slected, the slected node can be determined
     * from the parent object.
     *
     */
    protected void createCommands() {
        commands_ = new JPopupMenu();
        JMenuItem m = new JMenuItem("Create Context");
        m.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent evt) {
                createContext();
            }
        }
        );
        commands_.add(m);
    }


    /**
     * Determine all known OpenJMSServers. For the moment only the offline
     * mode is supported, which is basically opening up the database directly.
     *
     * @param tree The parent tree this root node belongs to.
     *
     */
    static public DefaultTreeModel createServerList(JTree tree) {
        // todo try and connect to all known servers.
        // for the moment just add one.
        OpenJMSServer server = new OpenJMSServer("Root", tree);
        return new DefaultTreeModel(server);
    }


    /**
     * Get all Contexts from the database for this JMS server and display
     * them as children of the root node.
     *
     */
    public void displayContexts() {
        Enumeration e = AdminConnection.instance().getAllContexts(null);
        if (e != null) {
            while (e.hasMoreElements()) {
                NameClassPair pair = (NameClassPair) e.nextElement();
                add(new OpenJMSContext(pair.getName(), null, tree_));
            }
            refresh();
        }
    }


    /**
     * Children are allowed for all servers
     *
     * @return boolean Always returns true.
     *
     */
    public boolean getAllowsChildren() {
        return true;
    }


    /**
     * This node has been right clicked. The locations of this node is given
     * by the loc object. Use this location to popup the server message
     * menu.
     *
     * @param The location of this node.
     *
     */
    public void displayCommands(Rectangle loc) {
        double x;
        double y;

        x = loc.getX();
        y = loc.getY();
        y += loc.getHeight();

        commands_.show(tree_, (int) x, (int) y);
    }


    /**
     * The unique name of this server
     *
     * @return String the server name.
     *
     */
    public String toString() {
        return serverName_;
    }


    /**
     * This node has changed. Inform the parent tree that it needs to be
     * re-drawn.
     *
     */
    public void refresh() {
        DefaultTreeModel model = (DefaultTreeModel) tree_.getModel();
        model.nodeStructureChanged((DefaultMutableTreeNode) this);
    }

    /**
     * Get the particular instance of the server that has been selected.
     *
     * @return OpenJMSServer the instance selected.
     *
     */
    static private OpenJMSServer getInstanceSelected() {
        Object loc = tree_.getLastSelectedPathComponent();
        return (OpenJMSServer) loc;
    }


    /**
     * A new context is being added for this server. Popup a context
     * add dialog, to collect relevent information, then update the database.
     * If the database update is successful, add the context node as a
     * a child of this server node, and refresh.
     *
     */
    static private void createContext() {
        OpenJMSServer This = getInstanceSelected();
        ObjectDialog.instance().display("Enter a unique context name",
            "Context Creation");
        if (ObjectDialog.instance().isConfirmed()) {
            try {
                AdminConnection.instance().createContext
                    (ObjectDialog.instance().getName());
                This.add(new OpenJMSContext
                    (ObjectDialog.instance().getName(), null, tree_));
                This.refresh();
            } catch (javax.naming.NamingException err) {
                JOptionPane.showMessageDialog
                    (tree_, err.getMessage(),
                        "Context Create Error", JOptionPane.ERROR_MESSAGE);
            }
        }
    }

} // End ServerList