/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.plugin;
import org.crsh.vfs.Resource;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* The base class for managing the CRaSH life cycle.
*/
public abstract class PluginLifeCycle {
/** . */
protected final Logger log = Logger.getLogger(getClass().getName());
/** . */
private PluginContext context;
/** . */
private Properties config;
public Properties getConfig() {
return config;
}
public void setConfig(Properties config) {
this.config = config;
}
public PluginContext getContext() {
return context;
}
protected final void start(PluginContext context) throws IllegalStateException {
if (this.context != null) {
throw new IllegalStateException("Already started");
}
// Get properties from system properties
Properties config = new Properties();
// Load properties from configuration file
Resource res = context.loadResource("crash.properties", ResourceKind.CONFIG);
if (res != null) {
try {
config.load(new ByteArrayInputStream(res.getContent()));
log.log(Level.FINE, "Loaded properties from " + config);
} catch (IOException e) {
log.log(Level.WARNING, "Could not configure from crash.properties", e);
}
} else {
log.log(Level.FINE, "Could not find crash.properties file");
}
// Override default properties from external config
if (this.config != null) {
config.putAll(this.config);
}
// Override default properties from command line
for (PropertyDescriptor<?> desc : PropertyDescriptor.ALL.values()) {
configureProperty(context, config, desc);
}
// Override default properties from plugin defined properties.
for (final CRaSHPlugin<?> plugin : context.manager.getPlugins()) {
Iterable<PropertyDescriptor<?>> capabilities = plugin.getConfigurationCapabilities();
Iterator<PropertyDescriptor<?>> i = capabilities.iterator();
if (i.hasNext()) {
while (i.hasNext()) {
PropertyDescriptor<?> descriptor = i.next();
log.fine("Adding plugin " + plugin + " property " + descriptor.getName());
configureProperty(context, config, descriptor);
}
} else {
log.fine("Plugin " + plugin + " does not declare any configuration property");
}
}
//
context.start();
//
this.context = context;
}
public final void stop() throws IllegalStateException {
if (context == null) {
throw new IllegalStateException("Not started");
}
PluginContext context = this.context;
this.context = null;
context.stop();
}
private void configureProperty(PluginContext context, Properties props, PropertyDescriptor<?> desc) {
String key = "crash." + desc.name;
String value = props.getProperty(key);
if (value != null) {
try {
if (context.getProperty(desc) == null) {
log.log(Level.INFO, "Configuring property " + desc.name + "=" + value + " from properties");
context.setProperty(desc, value);
}
}
catch (IllegalArgumentException e) {
log.log(Level.SEVERE, "Could not configure property", e);
}
}
}
}