com.sun.enterprise.tools.upgrade.gui.UpgradeWorker Maven / Gradle / Ivy
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package com.sun.enterprise.tools.upgrade.gui;
import com.sun.enterprise.tools.upgrade.UpgradeToolMain;
import com.sun.enterprise.tools.upgrade.logging.LogService;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import javax.swing.SwingWorker;
/**
* Worker thread to perform the upgrade and update the GUI.
*
* This thread adds a handler to the upgrade tool logger to
* listen for information that should be presented to the user
* in the GUI.
*
* @author Bobby Bissett
*/
public class UpgradeWorker extends SwingWorker {
// GUI components
private final MainFrame mainFrame;
private final ProgressPanel progressPanel;
// Component that performs the upgrade
private final UpgradeToolMain upgradeToolMain;
// Logger and handler used to receive messages to output
private static final Logger systemLogger = LogService.getLogger();
public UpgradeWorker(MainFrame mainFrame, UpgradeToolMain upgradeToolMain) {
this.mainFrame = mainFrame;
this.upgradeToolMain = upgradeToolMain;
this.progressPanel = mainFrame.getProgressPanel();
}
@Override
protected Void doInBackground() throws Exception {
GUILogHandler handler = new GUILogHandler(progressPanel);
Throwable unexpected = null;
try {
systemLogger.addHandler(handler);
upgradeToolMain.performUpgrade();
} catch (Throwable t) {
// just to be safe. shouldn't happen
System.err.println(t.getLocalizedMessage());
unexpected = t;
} finally {
systemLogger.removeHandler(handler);
if (unexpected != null) {
systemLogger.log(Level.SEVERE,
"Problem in swing worker thread", unexpected);
}
}
return null;
}
/*
* Called by the dispatch thread so it can update the GUI
* directly.
*/
@Override
protected void done() {
super.done();
mainFrame.done();
}
/*
* This helper class is used to listen for log messages and send
* them to the progress panel that will display them.
*/
private class GUILogHandler extends Handler {
private final ProgressPanel progressPanel;
private GUILogHandler(ProgressPanel progressPanel) {
this.progressPanel = progressPanel;
}
@Override
public void publish(LogRecord record) {
progressPanel.appendResultString(
record.getMessage(), record.getLevel());
}
@Override
public void flush() {
// no-op
}
@Override
public void close() throws SecurityException {
// no-op
}
}
}