Source Code Cross Referenced for AspectDeployer.java in  » EJB-Server-JBoss-4.2.1 » aspects » org » jboss » aop » deployment » 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 » aspects » org.jboss.aop.deployment 
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.aop.deployment;
023:
024:        import java.io.File;
025:        import java.net.URL;
026:        import java.util.Iterator;
027:
028:        import javax.management.InstanceNotFoundException;
029:        import javax.management.MBeanInfo;
030:        import javax.management.MBeanServer;
031:        import javax.management.MalformedObjectNameException;
032:        import javax.management.Notification;
033:        import javax.management.ObjectName;
034:
035:        import org.jboss.aop.AspectAnnotationLoader;
036:        import org.jboss.aop.AspectManager;
037:        import org.jboss.aop.AspectXmlLoader;
038:        import org.jboss.deployment.DeploymentException;
039:        import org.jboss.deployment.DeploymentInfo;
040:        import org.jboss.deployment.DeploymentState;
041:        import org.jboss.deployment.SubDeployer;
042:        import org.jboss.deployment.SubDeployerSupport;
043:        import org.jboss.mx.loading.HeirarchicalLoaderRepository3;
044:        import org.jboss.mx.loading.LoaderRepository;
045:        import org.jboss.util.file.ArchiveBrowser;
046:        import org.jboss.util.file.ClassFileFilter;
047:        import org.w3c.dom.Document;
048:        import org.w3c.dom.Element;
049:        import org.w3c.dom.Node;
050:        import org.w3c.dom.NodeList;
051:
052:        /**
053:         * Deployer for Aspects
054:         *
055:         * @author <a href="mailto:bill@jboss.org">Bill Burke</a>
056:         * @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
057:         * @version $Revision: 60560 $
058:         * @jmx:mbean name="jboss.aspect:AspectDeployer"
059:         * extends="org.jboss.deployment.SubDeployerMBean"
060:         */
061:        public class AspectDeployer extends SubDeployerSupport implements 
062:                SubDeployer, AspectDeployerMBean {
063:
064:            /**
065:             * Default CTOR used to set default values to the Suffixes and RelativeOrder
066:             * attributes. Those are read at subdeployer registration time by the MainDeployer
067:             * to alter its SuffixOrder.
068:             */
069:            public AspectDeployer() {
070:                initializeMainDeployer();
071:            }
072:
073:            /**
074:             * Set the suffixes and relative order attributes.
075:             * 
076:             * Those are read at subdeployer registration time by the MainDeployer
077:             * to update its SuffixOrder list.
078:             */
079:            protected void initializeMainDeployer() {
080:                setSuffixes(new String[] { ".aop", "-aop.xml" });
081:                setRelativeOrder(100);
082:            }
083:
084:            /**
085:             * Returns true if this deployer can deploy the given DeploymentInfo.
086:             *
087:             * @return True if this deployer can deploy the given DeploymentInfo.
088:             * @jmx:managed-operation
089:             */
090:            public boolean accepts(DeploymentInfo di) {
091:                String urlStr = di.url.toString();
092:                return urlStr.endsWith(".aop") || urlStr.endsWith(".aop/")
093:                        || urlStr.endsWith("-aop.xml");
094:            }
095:
096:            /**
097:             * Describe <code>init</code> method here.
098:             *
099:             * @param di a <code>DeploymentInfo</code> value
100:             * @throws DeploymentException if an error occurs
101:             * @jmx:managed-operation
102:             */
103:            public void init(DeploymentInfo di) throws DeploymentException {
104:                try {
105:                    if (di.watch == null) {
106:                        // resolve the watch
107:                        if (di.url.getProtocol().equals("file")) {
108:                            File file = new File(di.url.getFile());
109:
110:                            // If not directory we watch the package
111:                            if (!file.isDirectory()) {
112:                                di.watch = di.url;
113:                            }
114:                            // If directory we watch the xml files
115:                            else {
116:                                di.watch = new URL(di.url,
117:                                        "META-INF/jboss-aop.xml");
118:                            }
119:                        } else {
120:                            // We watch the top only, no directory support
121:                            di.watch = di.url;
122:                        }
123:                    }
124:                } catch (Exception e) {
125:                    log.error("failed to parse AOP document: ", e);
126:                    throw new DeploymentException(e);
127:                }
128:                super .init(di);
129:            }
130:
131:            /**
132:             * Describe <code>create</code> method here.
133:             *
134:             * @param di a <code>DeploymentInfo</code> value
135:             * @throws DeploymentException if an error occurs
136:             * @jmx:managed-operation
137:             */
138:            public void create(DeploymentInfo di) throws DeploymentException {
139:                ClassLoader old = Thread.currentThread()
140:                        .getContextClassLoader();
141:                try {
142:                    URL docURL = getDocUrl(di);
143:                    ClassLoader scl = getScopedClassLoader(di, docURL);
144:
145:                    if (scl != null) {
146:                        log.info("AOP deployment is scoped using classloader "
147:                                + scl);
148:                    }
149:
150:                    Thread.currentThread().setContextClassLoader(di.ucl);
151:                    if (!di.isXML) {
152:                        Iterator it = ArchiveBrowser.getBrowser(di.localUrl,
153:                                new ClassFileFilter());
154:                        AspectManager manager = (scl != null) ? AspectManager
155:                                .instance(scl) : AspectManager.instance();
156:                        AspectAnnotationLoader loader = new AspectAnnotationLoader(
157:                                manager);
158:                        loader.setClassLoader(scl);
159:                        loader.deployInputStreamIterator(it);
160:                    }
161:
162:                    AspectXmlLoader.deployXML(docURL, scl);
163:                    Notification msg = new Notification("AOP Deploy", this ,
164:                            getNextNotificationSequenceNumber());
165:                    sendNotification(msg);
166:                    log.debug("Deployed AOP: " + di.url);
167:                } catch (Exception ex) {
168:                    ex.printStackTrace();
169:                    throw new DeploymentException(ex);
170:                } finally {
171:                    Thread.currentThread().setContextClassLoader(old);
172:                }
173:            }
174:
175:            /**
176:             * The <code>start</code> method starts all the mbeans in this DeploymentInfo..
177:             *
178:             * @param di a <code>DeploymentInfo</code> value
179:             * @throws DeploymentException if an error occurs
180:             * @jmx:managed-operation
181:             */
182:            public void start(DeploymentInfo di) throws DeploymentException {
183:            }
184:
185:            /**
186:             * Undeploys the package at the url string specified. This will: Undeploy
187:             * packages depending on this one. Stop, destroy, and unregister all the
188:             * specified mbeans Unload this package and packages this package deployed
189:             * via the classpath tag. Keep track of packages depending on this one that
190:             * we undeployed so that they can be redeployed should this one be
191:             * redeployed.
192:             *
193:             * @param di the <code>DeploymentInfo</code> value to stop.
194:             * @jmx:managed-operation
195:             */
196:            public void stop(DeploymentInfo di)
197:            //throws DeploymentException
198:            {
199:                // Can happen on shutdown with a nested .aop module
200:                // which is first stopped then undeployed.
201:                if (di.state != DeploymentState.STARTED) {
202:                    log.debug("Ignoring request to stop '" + di.url
203:                            + "', current state: " + di.state);
204:                    return;
205:                }
206:
207:                log.debug("undeploying document " + di.url);
208:                ClassLoader old = Thread.currentThread()
209:                        .getContextClassLoader();
210:                try {
211:                    Thread.currentThread().setContextClassLoader(di.ucl);
212:                    if (!di.isXML) {
213:                        Iterator it = ArchiveBrowser.getBrowser(di.localUrl,
214:                                new ClassFileFilter());
215:                        AspectAnnotationLoader loader = new AspectAnnotationLoader(
216:                                AspectManager.instance());
217:                        loader.undeployInputStreamIterator(it);
218:
219:                    }
220:
221:                    URL docURL = getDocUrl(di);
222:                    //long start = System.currentTimeMillis();
223:                    AspectXmlLoader.undeployXML(docURL);
224:                    AspectManager.instance().unregisterClassLoader(di.ucl);
225:
226:                    /*
227:                    System.out.println("************************");
228:                    System.out.println("undeploy took: " + (System.currentTimeMillis() - start));
229:                    System.out.println("************************");
230:                     */
231:                    Notification msg = new Notification("AOP Undeploy", this ,
232:                            getNextNotificationSequenceNumber());
233:                    sendNotification(msg);
234:                } catch (Exception ex) {
235:                    log.error("failed to stop", ex);
236:                } finally {
237:                    Thread.currentThread().setContextClassLoader(old);
238:                }
239:            }
240:
241:            /**
242:             * Describe <code>destroy</code> method here.
243:             *
244:             * @param di a <code>DeploymentInfo</code> value
245:             * @jmx:managed-operation
246:             */
247:            public void destroy(DeploymentInfo di)
248:            //throws DeploymentException
249:            {
250:            }
251:
252:            /**
253:             * The startService method gets the mbeanProxies for MainDeployer
254:             * and ServiceController, used elsewhere.
255:             *
256:             * @throws Exception if an error occurs
257:             */
258:            protected void startService() throws Exception {
259:                super .startService();
260:            }
261:
262:            protected ObjectName getObjectName(MBeanServer server,
263:                    ObjectName name) throws MalformedObjectNameException {
264:                return name == null ? OBJECT_NAME : name;
265:            }
266:
267:            private URL getDocUrl(DeploymentInfo di) throws DeploymentException {
268:                URL docURL = di.localUrl;
269:                if (di.isXML == false)
270:                    docURL = di.localCl.findResource("META-INF/jboss-aop.xml");
271:                // Validate that the descriptor was found
272:                if (docURL == null)
273:                    throw new DeploymentException(
274:                            "Failed to find META-INF/jboss-aop.xml");
275:                return docURL;
276:            }
277:
278:            private ClassLoader getScopedClassLoader(DeploymentInfo di,
279:                    URL docUrl) throws Exception {
280:                //Scoped AOP deployments are only available when deployed as part of a scoped sar, ear etc.
281:                //It can contain an aop.xml file, or it can be part of a .aop file
282:                //Linking a standalone -aop.xml file onto a scoped deployment is not possible at the moment
283:                if (JBossScopedClassLoaderHelper.isScopedClassLoader(di.ucl)) {
284:                    return di.ucl;
285:                }
286:
287:                LoaderRepository attachToRepository = getLoaderRepositoryIfAttaching(
288:                        di, docUrl);
289:                if (attachToRepository != null) {
290:                    di.ucl.setRepository(attachToRepository);
291:                    attachToRepository.addClassLoader(di.ucl);
292:                    return di.ucl;
293:                }
294:
295:                return null;
296:            }
297:
298:            private LoaderRepository getLoaderRepositoryIfAttaching(
299:                    DeploymentInfo di, URL docUrl) throws Exception {
300:                if (di.parent == null) {
301:                    //We are a top-level deployment, check if we are meant to be attaching to a scoped repository
302:
303:                    //TODO Use AspectXmlLoader.loadURL once AOP is added to repository 
304:                    Document doc = AspectXmlLoader.loadURL(docUrl);
305:                    Element top = doc.getDocumentElement();
306:                    NodeList children = top.getChildNodes();
307:                    int childlength = children.getLength();
308:                    for (int i = 0; i < childlength; i++) {
309:                        Node child = children.item(i);
310:                        if (child.getNodeType() == Node.ELEMENT_NODE) {
311:                            Element element = (Element) child;
312:                            if (element.getTagName()
313:                                    .equals("loader-repository")) {
314:                                String repositoryName = null;
315:                                NodeList nestedChildren = child.getChildNodes();
316:                                int nestedChildLength = nestedChildren
317:                                        .getLength();
318:                                for (int j = 0; j < nestedChildLength; j++) {
319:                                    Node nestedChild = nestedChildren.item(j);
320:                                    if (nestedChild.getNodeType() == Node.TEXT_NODE
321:                                            || nestedChild.getNodeType() == Node.CDATA_SECTION_NODE) {
322:                                        repositoryName = nestedChild
323:                                                .getNodeValue().trim();
324:                                        break;
325:                                    }
326:                                }
327:                                log
328:                                        .info("Should attach deployment to loader repository "
329:                                                + repositoryName);
330:                                ObjectName on;
331:                                try {
332:                                    on = new ObjectName(repositoryName);
333:                                } catch (MalformedObjectNameException e) {
334:                                    throw new RuntimeException(
335:                                            "loader-repository='"
336:                                                    + repositoryName
337:                                                    + "' is not a valid object name",
338:                                            e);
339:                                }
340:
341:                                try {
342:                                    MBeanInfo info = server.getMBeanInfo(on);
343:                                } catch (InstanceNotFoundException e) {
344:                                    log
345:                                            .warn("No scoped loader repository exists with the name "
346:                                                    + on);
347:                                }
348:
349:                                LoaderRepository repository = (LoaderRepository) server
350:                                        .getAttribute(on, "Instance");
351:                                if (repository instanceof  HeirarchicalLoaderRepository3) {
352:                                    return repository;
353:                                } else {
354:                                    log
355:                                            .warn("Loader repository "
356:                                                    + on
357:                                                    + " is not a isolated loader repository. Deploying aspects in default domain.");
358:                                }
359:                            }
360:                        }
361:                    }
362:                }
363:
364:                return null;
365:            }
366:        }
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