001 /* 002 $Id: GroovyMBean.java,v 1.4 2005/06/10 09:55:30 cstein Exp $ 003 004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 package groovy.util; 047 048 import groovy.lang.GroovyObjectSupport; 049 import groovy.lang.GroovyRuntimeException; 050 051 import java.util.HashMap; 052 import java.util.Map; 053 import java.io.IOException; 054 055 import javax.management.Attribute; 056 import javax.management.JMException; 057 import javax.management.MBeanException; 058 import javax.management.MBeanInfo; 059 import javax.management.MBeanOperationInfo; 060 import javax.management.MBeanParameterInfo; 061 import javax.management.ObjectName; 062 import javax.management.MBeanServerConnection; 063 064 065 /** 066 * A GroovyObject facade for an underlying MBean which acts like a normal 067 * groovy object but which is actually implemented via 068 * an underlying JMX MBean. 069 * Properties and normal method invocations 070 * delegate to the MBeanServer to the actual MBean. 071 * 072 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 073 * @version $Revision: 1.4 $ 074 */ 075 public class GroovyMBean extends GroovyObjectSupport { 076 077 private MBeanServerConnection server; 078 private ObjectName name; 079 private MBeanInfo beanInfo; 080 private Map operations = new HashMap(); 081 082 public GroovyMBean(MBeanServerConnection server, ObjectName name) throws JMException, IOException { 083 this.server = server; 084 this.name = name; 085 this.beanInfo = server.getMBeanInfo(name); 086 087 MBeanOperationInfo[] operationInfos = beanInfo.getOperations(); 088 for (int i = 0; i < operationInfos.length; i++ ) { 089 MBeanOperationInfo info = operationInfos[i]; 090 operations.put(info.getName(), createSignature(info)); 091 } 092 } 093 094 public MBeanServerConnection server() { 095 return server; 096 } 097 098 public ObjectName name() { 099 return name; 100 } 101 102 public MBeanInfo info() { 103 return beanInfo; 104 } 105 106 public Object getProperty(String property) { 107 try { 108 return server.getAttribute(name, property); 109 } 110 catch (MBeanException e) { 111 throw new GroovyRuntimeException("Could not access property: " + property + ". Reason: " + e, e.getTargetException()); 112 } 113 catch (Exception e) { 114 throw new GroovyRuntimeException("Could not access property: " + property + ". Reason: " + e, e); 115 } 116 } 117 118 public void setProperty(String property, Object value) { 119 try { 120 server.setAttribute(name, new Attribute(property, value)); 121 } 122 catch (MBeanException e) { 123 throw new GroovyRuntimeException("Could not set property: " + property + ". Reason: " + e, e.getTargetException()); 124 } 125 catch (Exception e) { 126 throw new GroovyRuntimeException("Could not set property: " + property + ". Reason: " + e, e); 127 } 128 } 129 130 public Object invokeMethod(String method, Object arguments) { 131 String[] signature = (String[]) operations.get(method); 132 if (signature != null) { 133 Object[] argArray = null; 134 if (arguments instanceof Object[]) { 135 argArray = (Object[]) arguments; 136 } 137 else { 138 argArray = new Object[] { arguments }; 139 } 140 try { 141 return server.invoke(name, method, argArray, signature); 142 } 143 catch (MBeanException e) { 144 throw new GroovyRuntimeException("Could not invoke method: " + method + ". Reason: " + e, e.getTargetException()); 145 } 146 catch (Exception e) { 147 throw new GroovyRuntimeException("Could not invoke method: " + method + ". Reason: " + e, e); 148 } 149 } 150 else { 151 return super.invokeMethod(method, arguments); 152 } 153 } 154 155 protected String[] createSignature(MBeanOperationInfo info) { 156 MBeanParameterInfo[] params = info.getSignature(); 157 String[] answer = new String[params.length]; 158 for (int i = 0; i < params.length; i++) { 159 answer[i] = params[i].getType(); 160 } 161 return answer; 162 } 163 }