Source Code Cross Referenced for LocalInvoker.java in  » EJB-Server-JBoss-4.2.1 » server » org » jboss » invocation » local » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » server » org.jboss.invocation.local 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package org.jboss.invocation.local;
023:
024:        import java.net.InetAddress;
025:        import java.security.AccessController;
026:        import java.security.PrivilegedAction;
027:        import java.security.PrivilegedExceptionAction;
028:        import java.security.PrivilegedActionException;
029:        import javax.management.ObjectName;
030:        import javax.naming.InitialContext;
031:        import javax.transaction.TransactionManager;
032:
033:        import org.jboss.invocation.Invocation;
034:        import org.jboss.invocation.Invoker;
035:        import org.jboss.invocation.InvokerInterceptor;
036:        import org.jboss.mx.util.JMXExceptionDecoder;
037:        import org.jboss.proxy.TransactionInterceptor;
038:        import org.jboss.system.Registry;
039:        import org.jboss.system.ServiceMBeanSupport;
040:
041:        /**
042:         * The Invoker is a local gate in the JMX system.
043:         *
044:         * @author <a href="mailto:marc.fleury@jboss.org>Marc Fleury</a>
045:         * @author Scott.Stark@jboss.org
046:         * @version $Revision: 57209 $
047:         * @jmx:mbean extends="org.jboss.system.ServiceMBean"
048:         */
049:        public class LocalInvoker extends ServiceMBeanSupport implements 
050:                Invoker, LocalInvokerMBean {
051:            private MBeanServerAction serverAction = new MBeanServerAction();
052:
053:            protected void createService() throws Exception {
054:                // note on design: We need to call it ourselves as opposed to 
055:                // letting the client InvokerInterceptor look it 
056:                // up through the use of Registry, the reason being including
057:                // the classes in the client. 
058:                // If we move to a JNDI format (with local calls) for the
059:                // registry we could remove the call below
060:                InvokerInterceptor.setLocal(this );
061:
062:                Registry.bind(serviceName, this );
063:            }
064:
065:            protected void startService() throws Exception {
066:                InitialContext ctx = new InitialContext();
067:                try {
068:
069:                    /**
070:                     * FIXME marcf: what is this doing here?
071:                     */
072:                    TransactionManager tm = (TransactionManager) ctx
073:                            .lookup("java:/TransactionManager");
074:                    TransactionInterceptor.setTransactionManager(tm);
075:                } finally {
076:                    ctx.close();
077:                }
078:
079:                log.debug("Local invoker for JMX node started");
080:            }
081:
082:            protected void destroyService() {
083:                Registry.unbind(serviceName);
084:            }
085:
086:            // Invoker implementation --------------------------------
087:
088:            public String getServerHostName() {
089:                try {
090:                    return InetAddress.getLocalHost().getHostName();
091:                } catch (Exception ignored) {
092:                    return null;
093:                }
094:            }
095:
096:            /**
097:             * Invoke a method.
098:             */
099:            public Object invoke(Invocation invocation) throws Exception {
100:                ClassLoader oldCl = TCLAction.UTIL.getContextClassLoader();
101:
102:                ObjectName mbean = (ObjectName) Registry
103:                        .lookup((Integer) invocation.getObjectName());
104:                try {
105:                    Object[] args = { invocation };
106:                    Object rtnValue = serverAction.invoke(mbean, "invoke",
107:                            args, Invocation.INVOKE_SIGNATURE);
108:                    return rtnValue;
109:                } catch (Exception e) {
110:                    e = (Exception) JMXExceptionDecoder.decode(e);
111:                    if (log.isTraceEnabled())
112:                        log.trace("Failed to invoke on mbean: " + mbean, e);
113:                    throw e;
114:                } finally {
115:                    TCLAction.UTIL.setContextClassLoader(oldCl);
116:                }
117:            }
118:
119:            /** Perform the MBeanServer.invoke op in a PrivilegedExceptionAction if
120:             * running with a security manager.
121:             */
122:            class MBeanServerAction implements  PrivilegedExceptionAction {
123:                private ObjectName target;
124:                String method;
125:                Object[] args;
126:                String[] sig;
127:
128:                MBeanServerAction() {
129:                }
130:
131:                MBeanServerAction(ObjectName target, String method,
132:                        Object[] args, String[] sig) {
133:                    this .target = target;
134:                    this .method = method;
135:                    this .args = args;
136:                    this .sig = sig;
137:                }
138:
139:                public Object run() throws Exception {
140:                    Object rtnValue = server.invoke(target, method, args, sig);
141:                    return rtnValue;
142:                }
143:
144:                Object invoke(ObjectName target, String method, Object[] args,
145:                        String[] sig) throws Exception {
146:                    SecurityManager sm = System.getSecurityManager();
147:                    Object rtnValue = null;
148:                    if (sm == null) {
149:                        // Direct invocation on MBeanServer
150:                        rtnValue = server.invoke(target, method, args, sig);
151:                    } else {
152:                        try {
153:                            // Encapsulate the invocation in a PrivilegedExceptionAction
154:                            MBeanServerAction action = new MBeanServerAction(
155:                                    target, method, args, sig);
156:                            rtnValue = AccessController.doPrivileged(action);
157:                        } catch (PrivilegedActionException e) {
158:                            Exception ex = e.getException();
159:                            throw ex;
160:                        }
161:                    }
162:                    return rtnValue;
163:                }
164:            }
165:
166:            interface TCLAction {
167:                class UTIL {
168:                    static TCLAction getTCLAction() {
169:                        return System.getSecurityManager() == null ? NON_PRIVILEGED
170:                                : PRIVILEGED;
171:                    }
172:
173:                    static ClassLoader getContextClassLoader() {
174:                        return getTCLAction().getContextClassLoader();
175:                    }
176:
177:                    static ClassLoader getContextClassLoader(Thread thread) {
178:                        return getTCLAction().getContextClassLoader(thread);
179:                    }
180:
181:                    static void setContextClassLoader(ClassLoader cl) {
182:                        getTCLAction().setContextClassLoader(cl);
183:                    }
184:
185:                    static void setContextClassLoader(Thread thread,
186:                            ClassLoader cl) {
187:                        getTCLAction().setContextClassLoader(thread, cl);
188:                    }
189:                }
190:
191:                TCLAction NON_PRIVILEGED = new TCLAction() {
192:                    public ClassLoader getContextClassLoader() {
193:                        return Thread.currentThread().getContextClassLoader();
194:                    }
195:
196:                    public ClassLoader getContextClassLoader(Thread thread) {
197:                        return thread.getContextClassLoader();
198:                    }
199:
200:                    public void setContextClassLoader(ClassLoader cl) {
201:                        Thread.currentThread().setContextClassLoader(cl);
202:                    }
203:
204:                    public void setContextClassLoader(Thread thread,
205:                            ClassLoader cl) {
206:                        thread.setContextClassLoader(cl);
207:                    }
208:                };
209:
210:                TCLAction PRIVILEGED = new TCLAction() {
211:                    private final PrivilegedAction getTCLPrivilegedAction = new PrivilegedAction() {
212:                        public Object run() {
213:                            return Thread.currentThread()
214:                                    .getContextClassLoader();
215:                        }
216:                    };
217:
218:                    public ClassLoader getContextClassLoader() {
219:                        return (ClassLoader) AccessController
220:                                .doPrivileged(getTCLPrivilegedAction);
221:                    }
222:
223:                    public ClassLoader getContextClassLoader(final Thread thread) {
224:                        return (ClassLoader) AccessController
225:                                .doPrivileged(new PrivilegedAction() {
226:                                    public Object run() {
227:                                        return thread.getContextClassLoader();
228:                                    }
229:                                });
230:                    }
231:
232:                    public void setContextClassLoader(final ClassLoader cl) {
233:                        AccessController.doPrivileged(new PrivilegedAction() {
234:                            public Object run() {
235:                                Thread.currentThread()
236:                                        .setContextClassLoader(cl);
237:                                return null;
238:                            }
239:                        });
240:                    }
241:
242:                    public void setContextClassLoader(final Thread thread,
243:                            final ClassLoader cl) {
244:                        AccessController.doPrivileged(new PrivilegedAction() {
245:                            public Object run() {
246:                                thread.setContextClassLoader(cl);
247:                                return null;
248:                            }
249:                        });
250:                    }
251:                };
252:
253:                ClassLoader getContextClassLoader();
254:
255:                ClassLoader getContextClassLoader(Thread thread);
256:
257:                void setContextClassLoader(ClassLoader cl);
258:
259:                void setContextClassLoader(Thread thread, ClassLoader cl);
260:            }
261:        }
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