org.springframework.ide.eclipse.boot.dash.cloudfoundry.console.ApplicationLogConsole.java Source code

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Here is the source code for org.springframework.ide.eclipse.boot.dash.cloudfoundry.console.ApplicationLogConsole.java

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/*******************************************************************************
 * Copyright (c) 2015, 2016 Pivotal, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pivotal, Inc. - initial API and implementation
 *******************************************************************************/
package org.springframework.ide.eclipse.boot.dash.cloudfoundry.console;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.cloudfoundry.doppler.LogMessage;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.console.ConsolePlugin;
import org.eclipse.ui.console.IConsole;
import org.eclipse.ui.console.IConsoleManager;
import org.eclipse.ui.console.IOConsoleOutputStream;
import org.eclipse.ui.console.MessageConsole;
import org.springframework.ide.eclipse.boot.dash.BootDashActivator;
import org.springframework.ide.eclipse.boot.util.Log;

import reactor.core.Cancellation;

@SuppressWarnings("restriction")
public class ApplicationLogConsole extends MessageConsole
        implements IPropertyChangeListener, IApplicationLogConsole {

    private Map<LogType, IOConsoleOutputStream> activeStreams = new HashMap<>();

    private Cancellation logStreamingToken;

    public ApplicationLogConsole(String name, String type) {
        super(name, type, BootDashActivator.getImageDescriptor("icons/cloud_obj.png"), true);
    }

    public synchronized void setLogStreamingToken(Cancellation logStreamingToken) {
        if (this.logStreamingToken != null) {
            this.logStreamingToken.dispose();
        }
        this.logStreamingToken = logStreamingToken;
    }

    public synchronized Cancellation getLogStreamingToken() {
        return this.logStreamingToken;
    }

    public synchronized void writeLog(LogMessage log) {
        if (log == null) {
            return;
        }
        final LogType logType = LogType.getLogType(log);
        writeApplicationLog(log.getMessage(), logType);
    }

    /**
     *
     * @param message
     * @param type
     * @return true if successfully wrote to stream. False otherwise
     */
    public synchronized boolean writeApplicationLog(String message, LogType type) {
        if (message != null) {
            IOConsoleOutputStream stream = getStream(type);

            try {
                if (stream != null && !stream.isClosed()) {
                    message = format(message);
                    stream.write(message);
                    return true;
                }
            } catch (IOException e) {
                BootDashActivator.log(e);
            }
        }
        return false;
    }

    protected static String format(String message) {
        if (message.contains("\n") || message.contains("\r")) {
            return message;
        }
        return message + '\n';
    }

    public synchronized void close() {
        setLogStreamingToken(null);

        for (IOConsoleOutputStream outputStream : activeStreams.values()) {
            if (!outputStream.isClosed()) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    Log.log(e);
                }
            }
        }
        activeStreams.clear();
        IConsoleManager manager = ConsolePlugin.getDefault().getConsoleManager();
        manager.removeConsoles(new IConsole[] { this });
    }

    protected synchronized IOConsoleOutputStream getStream(final LogType logType) {

        IOConsoleOutputStream stream = activeStreams.get(logType);
        // If the console is no longer managed by the Eclipse console manager,
        // do NOT
        // write to the stream to avoid exceptions
        if (!isStillManaged() || (stream != null && stream.isClosed())) {
            return null;
        }
        if (stream == null) {
            stream = newOutputStream();

            final IOConsoleOutputStream toConfig = stream;

            // Setting colour must be done in UI thread
            Display.getDefault().syncExec(new Runnable() {

                @Override
                public void run() {
                    toConfig.setColor(Display.getDefault().getSystemColor(logType.getDisplayColour()));
                }
            });

            activeStreams.put(logType, stream);
        }
        return stream;
    }

    protected synchronized boolean isStillManaged() {
        IConsoleManager manager = ConsolePlugin.getDefault().getConsoleManager();

        IConsole[] activeConsoles = manager.getConsoles();
        if (activeConsoles != null) {
            for (IConsole console : activeConsoles) {
                if (console.getName().equals(this.getName())) {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void onMessage(LogMessage log) {
        writeLog(log);
    }

    @Override
    public void onComplete() {
        // Leave open for tail
    }

    @Override
    public void onError(Throwable exception) {
        writeApplicationLog(exception.getMessage(), LogType.CFSTDERROR);
    }

    @Override
    protected void init() {
        super.init();
        JFaceResources.getFontRegistry().addListener(this);
    }

    @Override
    protected void dispose() {
        JFaceResources.getFontRegistry().removeListener(this);
        super.dispose();
    }

    /**
     * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
     */
    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        String property = evt.getProperty();
        if (property.equals(IDebugUIConstants.PREF_CONSOLE_FONT)) {
            setFont(JFaceResources.getFont(IDebugUIConstants.PREF_CONSOLE_FONT));
        }
    }

}