| 1 | // jademx - JADE management using JMX |
| 2 | // Copyright 2005 Caboodle Networks, Inc. |
| 3 | // |
| 4 | // This library is free software; you can redistribute it and/or |
| 5 | // modify it under the terms of the GNU Lesser General Public |
| 6 | // License as published by the Free Software Foundation; either |
| 7 | // version 2.1 of the License, or (at your option) any later version. |
| 8 | // |
| 9 | // This library is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | // Lesser General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU Lesser General Public |
| 15 | // License along with this library; if not, write to the Free Software |
| 16 | // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
| 17 | |
| 18 | package jade.jademx.server; |
| 19 | |
| 20 | // use reflection so can compile without access to WebLogic |
| 21 | import java.lang.reflect.Field; |
| 22 | import java.lang.reflect.Method; |
| 23 | |
| 24 | import javax.management.MBeanServer; |
| 25 | import javax.naming.Context; |
| 26 | |
| 27 | // equivalent done via reflection |
| 28 | //import weblogic.jndi.Environment; |
| 29 | //import weblogic.management.MBeanHome; |
| 30 | |
| 31 | /** |
| 32 | * JadeMXServer for WebLogic using MBeanHome located using JNDI. |
| 33 | * implemented via reflection so can be compiled without WebLogic. |
| 34 | * @author David Bernstein, <a href="http://www.caboodlenetworks.com" |
| 35 | * >Caboodle Networks, Inc.</a> |
| 36 | */ |
| 37 | public class WebLogicMBeanHome implements JadeMXServer { |
| 38 | |
| 39 | /** JNDI name for MBeanHome */ |
| 40 | private String mBeanHomeJndiName; |
| 41 | |
| 42 | /** the platform MBean server */ |
| 43 | private MBeanServer mBeanServer; |
| 44 | |
| 45 | /** code to get MBeanServer from local MBeanHome found JNDI */ |
| 46 | protected final static int LOCAL_MBEAN_HOME_JNDI_NAME = 0; |
| 47 | |
| 48 | /** name of WebLogic <code>Environment</code> class */ |
| 49 | private final static String CLASSNAME_ENVIRONMENT = |
| 50 | "weblogic.jndi.Environment"; |
| 51 | |
| 52 | /** name of WebLogic <code>MBeanHome</code> class */ |
| 53 | private final static String CLASSNAME_MBEAN_HOME = |
| 54 | "weblogic.management.MBeanHome"; |
| 55 | |
| 56 | /** |
| 57 | * name for field |
| 58 | * {@link #CLASSNAME_MBEAN_HOME}<code>.LOCAL_JNDI_NAME</code> |
| 59 | */ |
| 60 | private final static String FIELDNAME_LOCAL_JNDI_NAME = |
| 61 | "LOCAL_JNDI_NAME"; |
| 62 | |
| 63 | /** |
| 64 | * name for method |
| 65 | * {@link #CLASSNAME_ENVIRONMENT}<code>.getInitialContext</code> |
| 66 | */ |
| 67 | private final static String METHODNAME_GET_INITIAL_CONTEXT = |
| 68 | "getInitialContext"; |
| 69 | |
| 70 | /** name for method <code>MBeanHome.getMBeanServer</code> */ |
| 71 | private final static String METHODNAME_GET_MBEAN_SERVER = |
| 72 | "getMBeanServer"; |
| 73 | |
| 74 | /** |
| 75 | * the JadeMXServer for WebLogic MBeanServer at local MBeanHome |
| 76 | */ |
| 77 | public WebLogicMBeanHome() { |
| 78 | //this( MBeanHome.LOCAL_JNDI_NAME ); // do via reflection |
| 79 | this( LOCAL_MBEAN_HOME_JNDI_NAME ); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * construct via a magic code |
| 84 | * @see #LOCAL_MBEAN_HOME_JNDI_NAME |
| 85 | * @param code magic code to use |
| 86 | */ |
| 87 | protected WebLogicMBeanHome( int code ) { |
| 88 | if ( LOCAL_MBEAN_HOME_JNDI_NAME == code ) { |
| 89 | String mBeanHomeLocalJndiName = null; |
| 90 | try { |
| 91 | Class mBeanHomeClass = Class.forName( CLASSNAME_MBEAN_HOME ); |
| 92 | Field localJndiNameField = |
| 93 | mBeanHomeClass.getField( FIELDNAME_LOCAL_JNDI_NAME ); |
| 94 | mBeanHomeLocalJndiName = |
| 95 | (String)localJndiNameField.get( null ); |
| 96 | } |
| 97 | catch ( Exception e ) { |
| 98 | throw new RuntimeException( |
| 99 | "exception getting value of"+ |
| 100 | CLASSNAME_MBEAN_HOME + "." + |
| 101 | FIELDNAME_LOCAL_JNDI_NAME, |
| 102 | e ); |
| 103 | |
| 104 | } |
| 105 | findMBeanServerViaJndi( mBeanHomeLocalJndiName ); |
| 106 | } |
| 107 | else { |
| 108 | throw new IllegalArgumentException("code "+code+" not understood"); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * the JadeMXServer for WebLogic MBeanServer at JNDI-specified MBeanHome |
| 114 | * @param mBeanHomeJndiName JNDI name for MBeanHome |
| 115 | */ |
| 116 | protected WebLogicMBeanHome( String mBeanHomeJndiName ) { |
| 117 | findMBeanServerViaJndi( mBeanHomeJndiName ); |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * given the JNDI name of the <code>MBeanHome</code>, get the <code>MBeanServer</code> |
| 122 | * @param mBeanHomeJndiName JNDI name of the MBeanHome |
| 123 | */ |
| 124 | private void findMBeanServerViaJndi( String mBeanHomeJndiName ) { |
| 125 | this.mBeanHomeJndiName = mBeanHomeJndiName; |
| 126 | try { |
| 127 | // Environment env = new Environment(); |
| 128 | Class environmentClass = Class.forName( CLASSNAME_ENVIRONMENT ); |
| 129 | Object env = environmentClass.newInstance(); |
| 130 | // Context ctx = env.getInitialContext(); |
| 131 | Method getInitialContextMethod = |
| 132 | environmentClass.getMethod( |
| 133 | METHODNAME_GET_INITIAL_CONTEXT, |
| 134 | new Class[0] ); |
| 135 | Context ctx = |
| 136 | (Context)getInitialContextMethod.invoke( env, new Object[0] ); |
| 137 | // MBeanHome home = (MBeanHome)ctx.lookup( mBeanHomeJndiName ); |
| 138 | Object home = ctx.lookup( mBeanHomeJndiName ); |
| 139 | // mBeanServer = home.getMBeanServer(); |
| 140 | Class mBeanHomeClass = Class.forName( CLASSNAME_MBEAN_HOME ); |
| 141 | Method getMBeanServerMethod = |
| 142 | mBeanHomeClass.getMethod( |
| 143 | METHODNAME_GET_MBEAN_SERVER, |
| 144 | new Class[0] ); |
| 145 | mBeanServer = |
| 146 | (MBeanServer)getMBeanServerMethod.invoke( home, new Object[0] ); |
| 147 | } |
| 148 | catch ( Exception e ) { |
| 149 | throw new RuntimeException( |
| 150 | "exception getting MBeanServer from MBeanHome at \""+ |
| 151 | mBeanHomeJndiName+"\"", e ); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /* (non-Javadoc) |
| 156 | * @see jade.jademx.server.JadeMXServer#getMBeanServer() |
| 157 | */ |
| 158 | public MBeanServer getMBeanServer() { |
| 159 | return mBeanServer; |
| 160 | } |
| 161 | |
| 162 | /* (non-Javadoc) |
| 163 | * @see java.lang.Object#toString() |
| 164 | */ |
| 165 | public String toString() { |
| 166 | return getClass().getName() + "(" + mBeanHomeJndiName + ")"; |
| 167 | } |
| 168 | |
| 169 | } |