Source Code Cross Referenced for ServerPluginRegistry.java in  » ERP-CRM-Financial » Kuali-Financial-System » edu » iu » uis » eden » plugin » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » Kuali Financial System » edu.iu.uis.eden.plugin 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005-2006 The Kuali Foundation.
003:         *
004:         *
005:         * Licensed under the Educational Community License, Version 1.0 (the "License");
006:         * you may not use this file except in compliance with the License.
007:         * You may obtain a copy of the License at
008:         *
009:         * http://www.opensource.org/licenses/ecl1.php
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package edu.iu.uis.eden.plugin;
018:
019:        import java.io.File;
020:        import java.util.ArrayList;
021:        import java.util.HashSet;
022:        import java.util.List;
023:        import java.util.Map;
024:        import java.util.Set;
025:        import java.util.TreeMap;
026:
027:        import javax.xml.namespace.QName;
028:
029:        import org.kuali.bus.services.KSBServiceLocator;
030:        import org.kuali.rice.config.Config;
031:        import org.kuali.rice.core.Core;
032:        import org.kuali.rice.resourceloader.ResourceLoader;
033:        import org.quartz.CronTrigger;
034:        import org.quartz.JobDetail;
035:        import org.quartz.SimpleTrigger;
036:        import org.quartz.Trigger;
037:
038:        import edu.emory.mathcs.backport.java.util.concurrent.Executors;
039:        import edu.emory.mathcs.backport.java.util.concurrent.ScheduledExecutorService;
040:        import edu.emory.mathcs.backport.java.util.concurrent.ScheduledFuture;
041:        import edu.emory.mathcs.backport.java.util.concurrent.TimeUnit;
042:        import edu.iu.uis.eden.EdenConstants;
043:        import edu.iu.uis.eden.mail.DailyEmailJob;
044:        import edu.iu.uis.eden.plugin.PluginUtils.PluginZipFileFilter;
045:        import edu.iu.uis.eden.util.ClassLoaderUtils;
046:
047:        /**
048:         * A PluginRegistry implementation which loads plugins from the file system on the server.
049:         *
050:         * @author Eric Westfall
051:         */
052:        public class ServerPluginRegistry extends BasePluginRegistry {
053:
054:            private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger
055:                    .getLogger(ServerPluginRegistry.class);
056:
057:            private List<String> pluginDirectories = new ArrayList<String>();
058:            private File sharedPluginDirectory;
059:            //consider removing this from here and using the super class to get it.
060:            private Plugin institutionalPlugin;
061:            private Reloader reloader;
062:            private HotDeployer hotDeployer;
063:
064:            private ScheduledExecutorService scheduledExecutor;
065:            private ScheduledFuture reloaderFuture;
066:            private ScheduledFuture hotDeployerFuture;
067:
068:            public ServerPluginRegistry() {
069:                super (new QName(Core.getCurrentContextConfig()
070:                        .getMessageEntity(),
071:                        ResourceLoader.PLUGIN_REGISTRY_LOADER_NAME));
072:            }
073:
074:            public void start() throws Exception {
075:                scheduledExecutor = Executors.newScheduledThreadPool(2);
076:                sharedPluginDirectory = loadSharedPlugin();
077:                reloader = new Reloader();
078:                hotDeployer = new HotDeployer(PluginUtils.getPluginRegistry(),
079:                        sharedPluginDirectory, pluginDirectories);
080:                loadPlugins(sharedPluginDirectory);
081:                // TODO make the delay configurable
082:                // TODO if we are running in dev.mode than the thread pool isn't started which causes the scheduling below to fail
083:                // just disable hot deploy and reload in dev.mode for now, but better solution needed.  Probably just use our own
084:                // thread pool here instead
085:                if (!Core.getCurrentContextConfig().getDevMode()) {
086:                    this .reloaderFuture = scheduledExecutor
087:                            .scheduleWithFixedDelay(reloader, 5, 5,
088:                                    TimeUnit.SECONDS);
089:                    this .hotDeployerFuture = scheduledExecutor
090:                            .scheduleWithFixedDelay(hotDeployer, 5, 5,
091:                                    TimeUnit.SECONDS);
092:                }
093:                super .start();
094:            }
095:
096:            public void stop() throws Exception {
097:                stopReloader();
098:                stopHotDeployer();
099:                reloader = null;
100:                hotDeployer = null;
101:
102:                // cleanup reference to institutional plugin
103:                institutionalPlugin = null;
104:                if (scheduledExecutor != null) {
105:                    scheduledExecutor.shutdownNow();
106:                    scheduledExecutor = null;
107:                }
108:                super .stop();
109:            }
110:
111:            protected void stopReloader() {
112:                if (reloaderFuture != null) {
113:                    if (!reloaderFuture.cancel(true)) {
114:                        LOG.warn("Failed to cancel the plugin reloader.");
115:                    }
116:                    reloaderFuture = null;
117:                }
118:            }
119:
120:            protected void stopHotDeployer() {
121:                if (hotDeployerFuture != null) {
122:                    if (!hotDeployerFuture.cancel(true)) {
123:                        LOG.warn("Failed to cancel the hot deployer.");
124:                    }
125:                    hotDeployerFuture = null;
126:                }
127:            }
128:
129:            protected void loadPlugins(File sharedPluginDirectory) {
130:                Map<String, File> pluginLocations = new TreeMap<String, File>(
131:                        new PluginNameComparator(PluginUtils
132:                                .getInstitutionalPluginName()));
133:                PluginZipFileFilter pluginFilter = new PluginZipFileFilter();
134:                //PluginDirectoryFilter pluginFilter = new PluginDirectoryFilter(sharedPluginDirectory);
135:                Set<File> visitedFiles = new HashSet<File>();
136:                for (String pluginDir : pluginDirectories) {
137:                    LOG.info("Reading plugins from " + pluginDir);
138:                    File file = new File(pluginDir);
139:                    if (visitedFiles.contains(file)) {
140:                        LOG.info("Skipping visited directory: " + pluginDir);
141:                        continue;
142:                    }
143:                    visitedFiles.add(file);
144:                    if (!file.exists() || !file.isDirectory()) {
145:                        LOG.warn(file.getAbsoluteFile()
146:                                + " is not a valid plugin directory.");
147:                        continue;
148:                    }
149:                    File[] pluginZips = file.listFiles(pluginFilter);
150:                    for (int i = 0; i < pluginZips.length; i++) {
151:                        File pluginZip = pluginZips[i];
152:                        int indexOf = pluginZip.getName().lastIndexOf(".zip");
153:                        String pluginName = pluginZip.getName().substring(0,
154:                                indexOf);
155:                        if (pluginLocations.containsKey(pluginName)) {
156:                            LOG
157:                                    .warn("There already exists an installed plugin with the name '"
158:                                            + pluginName
159:                                            + "', ignoring plugin "
160:                                            + pluginZip.getAbsolutePath());
161:                            continue;
162:                        }
163:                        pluginLocations.put(pluginName, pluginZip);
164:                    }
165:                }
166:                Plugin institutionalPlugin = null;
167:                for (String pluginName : pluginLocations.keySet()) {
168:                    File pluginZipFile = pluginLocations.get(pluginName);
169:                    // now execute the loading of the plugins
170:                    boolean isInstitutionalPlugin = PluginUtils
171:                            .isInstitutionalPlugin(pluginName);
172:                    try {
173:                        LOG.info("Loading "
174:                                + (isInstitutionalPlugin ? "Institutional "
175:                                        : "") + "plugin '" + pluginName + "'");
176:                        ClassLoader parentClassLoader = ClassLoaderUtils
177:                                .getDefaultClassLoader();
178:                        Config parentConfig = Core.getCurrentContextConfig();
179:                        if (institutionalPlugin != null) {
180:                            parentClassLoader = institutionalPlugin
181:                                    .getClassLoader();
182:                            parentConfig = institutionalPlugin.getConfig();
183:                        }
184:                        ZipFilePluginLoader loader = new ZipFilePluginLoader(
185:                                pluginZipFile, sharedPluginDirectory,
186:                                parentClassLoader, parentConfig,
187:                                isInstitutionalPlugin);
188:                        PluginEnvironment environment = new PluginEnvironment(
189:                                loader, this );
190:                        environment.load();
191:                        // TODO consider moving this inside either the loader or the environment?  Because this will need to be able
192:                        // to be reset if the institutional plugin is "hot deployed"
193:                        if (isInstitutionalPlugin) {
194:                            setInstitutionalPlugin(environment.getPlugin());
195:                        }
196:                        addPluginEnvironment(environment);
197:                    } catch (Exception e) {
198:                        LOG.error("Failed to read workflow plugin '"
199:                                + pluginName + "'", e);
200:                        if (isInstitutionalPlugin) {
201:                            throw new PluginException(
202:                                    "Failed to load the institutional plugin with name '"
203:                                            + pluginName + "'.", e);
204:                        }
205:                    }
206:                }
207:            }
208:
209:            @Override
210:            public void addPluginEnvironment(PluginEnvironment pluginEnvironment) {
211:                super .addPluginEnvironment(pluginEnvironment);
212:                reloader.addReloadable(pluginEnvironment);
213:            }
214:
215:            @Override
216:            public PluginEnvironment removePluginEnvironment(QName pluginName) {
217:                PluginEnvironment environment = super 
218:                        .removePluginEnvironment(pluginName);
219:                reloader.removeReloadable(environment);
220:                return environment;
221:            }
222:
223:            public File loadSharedPlugin() {
224:                return PluginUtils.findSharedDirectory(pluginDirectories);
225:            }
226:
227:            public void setPluginDirectories(List<String> pluginDirectories) {
228:                this .pluginDirectories = pluginDirectories;
229:            }
230:
231:            public void setSharedPluginDirectory(File sharedPluginDirectory) {
232:                this .sharedPluginDirectory = sharedPluginDirectory;
233:            }
234:
235:            public Plugin getInstitutionalPlugin() {
236:                return institutionalPlugin;
237:            }
238:
239:            public void setInstitutionalPlugin(Plugin institutionalPlugin) {
240:                this .institutionalPlugin = institutionalPlugin;
241:            }
242:
243:            protected HotDeployer getHotDeployer() {
244:                return hotDeployer;
245:            }
246:
247:            protected Reloader getReloader() {
248:                return reloader;
249:            }
250:
251:        }
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