/**
*
* Copyright 2005 LogicBlaze, Inc. http://www.logicblaze.com
*
* 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.servicemix.web.jmx;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.QueryExp;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
/**
* A useful base class for any JMS related servlet; there are various ways to
* map JMS operations to web requests so we put most of the common behaviour in
* a reusable base class.
*
* @version $Revision$
*/
public abstract class JMXServletSupport extends HttpServlet {
protected static final String MANAGEMENT_CONTEXT_PROPERTY = "org.activemq.jmx.ManagementContext";
private ManagementContext managementContext;
public void init() throws ServletException {
if (managementContext == null) {
managementContext = (ManagementContext) getServletContext().getAttribute(MANAGEMENT_CONTEXT_PROPERTY);
if (managementContext == null) {
managementContext = new ManagementContext();
}
}
}
public MBeanServer getMBeanServer() {
return managementContext.getMBeanServer();
}
public ManagementContext getManagementContext() {
return managementContext;
}
public void setManagementContext(ManagementContext managementContext) {
this.managementContext = managementContext;
}
protected QueryExp getQueryExp(HttpServletRequest request) throws ServletException {
QueryExp answer = null;
String value = request.getParameter("query");
if (value != null) {
try {
answer = new ObjectName(value);
}
catch (MalformedObjectNameException e) {
throw new ServletException(e);
}
}
return answer;
}
protected ObjectName getObjectName(HttpServletRequest request) throws ServletException {
String value = request.getParameter("name");
ObjectName answer = null;
if (value != null) {
try {
answer = new ObjectName(value);
}
catch (MalformedObjectNameException e) {
throw new ServletException("Failed to parse object name: " + value + ". Reason: " + e, e);
}
}
return answer;
}
/**
* Converts the value of the named parameter into a boolean
*/
protected boolean asBoolean(HttpServletRequest request, String name) {
String param = request.getParameter(name);
return param != null && param.equalsIgnoreCase("true");
}
}