/*
* Copyright 2007-2008 the original author or authors.
*
* Licensed 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.impalaframework.jmx.bootstrap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.impalaframework.bootstrap.ConfigurationSettings;
import org.impalaframework.bootstrap.ContextLocationResolver;
import org.impalaframework.config.BooleanPropertyValue;
import org.impalaframework.config.PropertySource;
public class JMXContextLocationResolver implements ContextLocationResolver {
private static Log logger = LogFactory.getLog(JMXContextLocationResolver.class);
public boolean addContextLocations(ConfigurationSettings configSettings,
PropertySource propertySource) {
//add jmx operartions
addJmxOperations(configSettings, propertySource);
//whether to add mx4j adaptor
addMx4jAdaptorContext(configSettings, propertySource);
return false;
}
void addMx4jAdaptorContext(ConfigurationSettings configSettings,
PropertySource propertySource) {
BooleanPropertyValue exposeMx4jAdaptor = new BooleanPropertyValue(propertySource, JMXBootstrapProperties.EXPOSE_MX4J_ADAPTOR, false);
configSettings.addProperty(JMXBootstrapProperties.EXPOSE_MX4J_ADAPTOR, exposeMx4jAdaptor);
if (exposeMx4jAdaptor.getValue()) {
if (configSettings.getContextLocations().contains("META-INF/impala-jmx-bootstrap.xml")) {
boolean mx4jPresent = isMX4JPresent();
if (mx4jPresent) {
configSettings.add("META-INF/impala-jmx-adaptor-bootstrap.xml");
} else {
logger.warn("'expose.mx4j.adaptor' set to true MX4J classes not present. Not exposing Mx4j adaptor");
}
} else {
logger.warn("'expose.mx4j.adaptor' set to true but 'expose.jmx.operations' set to false. Not exposing Mx4j adaptor");
}
}
}
protected void addJmxOperations(ConfigurationSettings configSettings,
PropertySource propertySource) {
BooleanPropertyValue exposeJmx = new BooleanPropertyValue(propertySource, JMXBootstrapProperties.EXPOSE_JMX_OPERATIONS, true);
configSettings.addProperty(JMXBootstrapProperties.EXPOSE_JMX_OPERATIONS, exposeJmx);
if (exposeJmx.getValue()) {
configSettings.add("META-INF/impala-jmx-bootstrap.xml");
}
}
boolean isMX4JPresent() {
boolean mx4jPresent = false;
//Check for presence of MX4J packages
try {
Class.forName("mx4j.tools.adaptor.http.XSLTProcessor");
mx4jPresent = true;
} catch (ClassNotFoundException e) {
mx4jPresent = false;
}
return mx4jPresent;
}
}