/*
* 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 javax.management.Attribute;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import org.apache.tools.ant.BuildException;
/**
* Access <em>JMX</em> JSR 160 MBeans Server.
* <ul>
* <li>Get Mbeans attributes</li>
* <li>Show Get result as Ant console log</li>
* <li>Bind Get result as Ant properties</li>
* </ul>
* <p>
* Examples: Set a Mbean Manager attribute maxActiveSessions. Set this attribute with fresh jmx connection without save
* reference
* </p>
*
* <pre>
* <jmx:set
* host="127.0.0.1"
* port="9014"
* ref=""
* name="Catalina:type=Manager,context="/ClusterTest",host=localhost"
* attribute="maxActiveSessions"
* value="100"
* type="int"
* echo="false">
* />
* </pre>
* <p>
* First call to a remote MBean server save the JMXConnection a reference <em>jmx.server</em>
* </p>
* These tasks require Ant 1.6 or later interface.
*
* @since 5.5.10
*/
public class JMXAccessorSetTask extends JMXAccessorTask {
// ----------------------------------------------------- Instance Variables
private String attribute;
private String value;
private String type;
private boolean convert = false;
// ------------------------------------------------------------- Properties
/**
* @return Returns the attribute.
*/
public String getAttribute() {
return attribute;
}
/**
* @param attribute The attribute to set.
*/
public void setAttribute(String attribute) {
this.attribute = attribute;
}
/**
* @return Returns the value.
*/
public String getValue() {
return value;
}
/**
* @param value The value to set.
*/
public void setValue(String value) {
this.value = value;
}
/**
* @return Returns the type.
*/
public String getType() {
return type;
}
/**
* @param valueType The type to set.
*/
public void setType(String valueType) {
this.type = valueType;
}
/**
* @return Returns the convert.
*/
public boolean isConvert() {
return convert;
}
/**
* @param convert The convert to set.
*/
public void setConvert(boolean convert) {
this.convert = convert;
}
// ------------------------------------------------------ protected Methods
@Override
public String jmxExecute(MBeanServerConnection jmxServerConnection) throws Exception {
if (getName() == null) {
throw new BuildException("Must specify a 'name'");
}
if ((attribute == null || value == null)) {
throw new BuildException("Must specify a 'attribute' and 'value' for set");
}
return jmxSet(jmxServerConnection, getName());
}
/**
* Set property value.
*
* @param jmxServerConnection Connection to the JMX server
* @param name The MBean name
*
* @return null (no error message to report other than exception)
*
* @throws Exception An error occurred
*/
protected String jmxSet(MBeanServerConnection jmxServerConnection, String name) throws Exception {
Object realValue;
if (type != null) {
realValue = convertStringToType(value, type);
} else {
if (isConvert()) {
String mType = getMBeanAttributeType(jmxServerConnection, name, attribute);
realValue = convertStringToType(value, mType);
} else {
realValue = value;
}
}
jmxServerConnection.setAttribute(new ObjectName(name), new Attribute(attribute, realValue));
return null;
}
/**
* Get MBean Attribute from Mbean Server
*
* @param jmxServerConnection The JMX connection name
* @param name The MBean name
* @param attribute The attribute name
*
* @return The type of the attribute
*
* @throws Exception An error occurred
*/
protected String getMBeanAttributeType(MBeanServerConnection jmxServerConnection, String name, String attribute)
throws Exception {
ObjectName oname = new ObjectName(name);
String mattrType = null;
MBeanInfo minfo = jmxServerConnection.getMBeanInfo(oname);
MBeanAttributeInfo[] attrs = minfo.getAttributes();
for (int i = 0; mattrType == null && i < attrs.length; i++) {
if (attribute.equals(attrs[i].getName())) {
mattrType = attrs[i].getType();
}
}
return mattrType;
}
}