/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (the | |
* "License"); you may not use this file except in compliance | |
* with the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
package org.apache.karaf.main; | |
import org.osgi.framework.Bundle; | |
import org.osgi.framework.BundleContext; | |
import org.osgi.framework.BundleEvent; | |
import org.osgi.framework.Constants; | |
import org.osgi.framework.FrameworkEvent; | |
import org.osgi.framework.FrameworkListener; | |
import org.osgi.framework.SynchronousBundleListener; | |
import org.osgi.framework.startlevel.FrameworkStartLevel; | |
/** | |
* Watches the startup of the framework and displays a progress bar of the number of bundles started / total. | |
* The listener will remove itself after the desired start level is reached or the system property karaf.console.started is set to | |
* true. | |
*/ | |
class StartupListener implements FrameworkListener, SynchronousBundleListener { | |
private static final String SYSTEM_PROP_KARAF_CONSOLE_STARTED = "karaf.console.started"; | |
private int currentPercentage; | |
private final BundleContext context; | |
StartupListener(BundleContext context) { | |
this.context = context; | |
this.currentPercentage = 0; | |
context.addBundleListener(this); | |
context.addFrameworkListener(this); | |
} | |
public synchronized void bundleChanged(BundleEvent bundleEvent) { | |
Bundle[] bundles = context.getBundles(); | |
int numActive = 0; | |
int numBundles = bundles.length; | |
for (Bundle bundle : bundles) { | |
if (bundle.getHeaders().get(Constants.FRAGMENT_HOST) != null) { | |
numBundles--; | |
} else if (bundle.getState() == Bundle.ACTIVE) { | |
numActive ++; | |
} | |
} | |
boolean started = Boolean.parseBoolean(System.getProperty(SYSTEM_PROP_KARAF_CONSOLE_STARTED, "false")); | |
if (!started) { | |
showProgressBar(numActive, numBundles); | |
} | |
} | |
public synchronized void frameworkEvent(FrameworkEvent frameworkEvent) { | |
if (frameworkEvent.getType() == FrameworkEvent.STARTLEVEL_CHANGED) { | |
int defStartLevel = Integer.parseInt(System.getProperty(Constants.FRAMEWORK_BEGINNING_STARTLEVEL)); | |
int startLevel = ((FrameworkStartLevel) context.getBundle(0).adapt(FrameworkStartLevel.class)).getStartLevel(); | |
if (startLevel >= defStartLevel) { | |
context.removeBundleListener(this); | |
context.removeFrameworkListener(this); | |
} | |
} | |
} | |
public void showProgressBar(int done, int total) { | |
// progress bar can only have 72 characters so that 80 char wide terminal will display properly | |
int percent = (done * 100) / total; | |
int scaledPercent = (int) (72.0 * (percent / 100.0)); | |
// Make sure we do not go backwards with percentage | |
if (percent > currentPercentage) { | |
currentPercentage = percent; | |
StringBuilder sb = new StringBuilder(); | |
sb.append(String.format("\r%3d%% [", percent)); | |
for (int i = 0; i < 72; i++) { | |
if (i < scaledPercent) { | |
sb.append('='); | |
} else if (i == scaledPercent) { | |
sb.append('>'); | |
} else { | |
sb.append(' '); | |
} | |
} | |
sb.append(']'); | |
System.out.print(sb.toString()); | |
System.out.flush(); | |
} | |
if (done == total) { | |
System.out.println(); | |
} | |
} | |
} |