/*
 * 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.catalina.ant.jmx;

import org.apache.tools.ant.BuildException;

/**
 *
 * Definition
 * <pre>
 *   <path id="catalina_ant">
 *       <fileset dir="${catalina.home}/server/lib">
 *           <include name="catalina-ant.jar"/>
 *       </fileset>
 *   </path>
 *
 *   <typedef
 *       name="jmxEquals"
 *       classname="org.apache.catalina.ant.jmx.JMXAccessorEqualsCondition"
 *       classpathref="catalina_ant"/>
 * </pre>
 *
 * usage: Wait for start backup node
 * <pre>
 *     <target name="wait">
 *        <waitfor maxwait="${maxwait}" maxwaitunit="second" timeoutproperty="server.timeout" >
 *           <and>
 *               <socket server="${server.name}" port="${server.port}"/>
 *               <http url="${url}"/>
 *               <jmxEquals
 *                   host="localhost" port="9014" username="controlRole" password="tomcat"
 *                   name="Catalina:type=IDataSender,host=localhost,senderAddress=192.168.111.1,senderPort=9025"
 *                   attribute="connected" value="true"
 *               />
 *           </and>
 *       </waitfor>
 *       <fail if="server.timeout" message="Server ${url} don't answer inside ${maxwait} sec" />
 *       <echo message="Server ${url} alive" />
 *   </target>
 *
 * </pre>
 *
 * @author Peter Rossbach
 * @since 5.5.10
 */
public class JMXAccessorEqualsCondition extends JMXAccessorConditionBase {

    @Override
    public boolean eval() {
        String value = getValue();

        if (value == null) {
            throw new BuildException("value attribute is not set");
        }
        if (getName() == null || getAttribute() == null) {
            throw new BuildException(
                    "Must specify an MBean name and attribute for equals condition");
        }
        //FIXME check url or host/parameter
        String jmxValue = accessJMXValue();
        if (jmxValue != null) {
            return jmxValue.equals(value);
        }
        return false;
    }
}