serverfeaturebar.java

Java的面向对象数据库系统的源代码

package org.ozoneDB.adminGui.feature.server;

import org.ozoneDB.adminGui.main.AdminGui;
import org.ozoneDB.adminGui.feature.ActionBar;
import org.ozoneDB.adminGui.feature.InfoPanel;
import org.ozoneDB.adminGui.res.Images;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

/**
 * $Id: ServerFeatureBar.java,v 1.2 2003/03/24 08:36:55 per_nyfelt Exp $
 */
public class ServerFeatureBar extends ActionBar {
    private InfoPanel serverInfoPanel;

    public ServerFeatureBar(ServerInfoPanel userInfoPanel) {
        this.serverInfoPanel = userInfoPanel;
        addComponents();
    }

    protected void addComponents() {

        this.removeAll();
        //gbc.gridx = GridBagConstraints.REMAINDER;
        gbc.insets = new Insets(1, 5, 1, 5);
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.gridy = 0;

        // Add label
        //gbc.anchor = GridBagConstraints.SOUTHWEST;
        //gbc.weighty = .3;
        add(new ActionButton("shutdown", Images.SERVER_SHUTDOWN, new ShutdownListener()), gbc);

        gbc.gridy++;
        add(new ActionButton("transactions", Images.SERVER_TRANSACTIONS, new TransactionLister()), gbc);

        gbc.gridy++;
        add(new ActionButton("garbage collector", Images.SERVER_GARBAGE_COLLECTOR, new GarbageCollectorListener(), "start Ozone garbage collector"), gbc);
    }

    private class ShutdownListener implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            System.out.println("shuttting down server");
            try {
                AdminGui.instance().getDb().admin().shutdown();
                AdminGui.instance().showDisconnected();
            } catch (Exception e) {
                serverInfoPanel.setDisplay(new JTextArea("Unable to shut down: " + e.getMessage()));
            }
        }
    }

    private class TransactionLister implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            System.out.println("list all transactions");
            int transactionCount = 0;
            try {
                transactionCount = AdminGui.instance().getDb().admin().numberOfTxs();
            } catch (Exception e) {
                System.out.println("Unable to retrieve transaction count: " + e.getMessage());
            }
            JTextArea display = new JTextArea();

            display.append("Number of transactions: " + transactionCount);
            serverInfoPanel.setDisplay(display);
        }
    }

    private class GarbageCollectorListener implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            System.out.println("Strating garbage collection");
            try {
                AdminGui.instance().getDb().admin().startGarbageCollection();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }


    }
}