Source Code Cross Referenced for ClassLoaderViewPortlet.java in  » EJB-Server-geronimo » plugins » org » apache » geronimo » console » classloaderview » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server geronimo » plugins » org.apache.geronimo.console.classloaderview 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
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:         */package org.apache.geronimo.console.classloaderview;
017:
018:        import java.io.IOException;
019:        import java.util.ArrayList;
020:        import java.util.Iterator;
021:        import java.util.Hashtable;
022:        import java.util.List;
023:        import java.util.Collections;
024:
025:        import org.apache.geronimo.console.BasePortlet;
026:        import org.apache.geronimo.console.util.StringTree;
027:
028:        import javax.portlet.ActionRequest;
029:        import javax.portlet.ActionResponse;
030:        import javax.portlet.PortletConfig;
031:        import javax.portlet.PortletException;
032:        import javax.portlet.PortletRequestDispatcher;
033:        import javax.portlet.RenderRequest;
034:        import javax.portlet.RenderResponse;
035:        import javax.portlet.WindowState;
036:
037:        import org.apache.geronimo.kernel.util.ClassLoaderRegistry;
038:
039:        public class ClassLoaderViewPortlet extends BasePortlet {
040:
041:            private static final String NORMALVIEW_JSP = "/WEB-INF/view/classloaderview/view.jsp";
042:
043:            private static final String MAXIMIZEDVIEW_JSP = "/WEB-INF/view/classloaderview/view.jsp";
044:
045:            private static final String HELPVIEW_JSP = "/WEB-INF/view/classloaderview/help.jsp";
046:
047:            private PortletRequestDispatcher normalView;
048:
049:            private PortletRequestDispatcher maximizedView;
050:
051:            private PortletRequestDispatcher helpView;
052:
053:            private boolean inverse;
054:
055:            public void processAction(ActionRequest actionRequest,
056:                    ActionResponse actionResponse) throws PortletException,
057:                    IOException {
058:                // set selectedNode
059:                actionRequest.getPortletSession().setAttribute("selectedNode",
060:                        actionRequest.getParameter("snNode"));
061:                // toggle between inverse and non-inverse each time the form is processed
062:                inverse = actionRequest.getParameter("inverse")
063:                        .equalsIgnoreCase("true") ? true : false;
064:                // toggle
065:                inverse = (!inverse);
066:                // store inverse variable for the jsp
067:                actionRequest.getPortletSession().setAttribute("invert",
068:                        inverse);
069:            }
070:
071:            protected void doView(RenderRequest renderRequest,
072:                    RenderResponse renderResponse) throws IOException,
073:                    PortletException {
074:                if (WindowState.MINIMIZED
075:                        .equals(renderRequest.getWindowState())) {
076:                    return;
077:                }
078:                renderRequest.getPortletSession().setAttribute(
079:                        "classloaderTree", this );
080:                renderRequest.setAttribute("inverse", inverse);
081:                renderRequest.getPortletSession().setAttribute("inverse",
082:                        inverse);
083:
084:                if (WindowState.NORMAL.equals(renderRequest.getWindowState())) {
085:                    normalView.include(renderRequest, renderResponse);
086:                } else {
087:                    maximizedView.include(renderRequest, renderResponse);
088:                }
089:            }
090:
091:            protected void doHelp(RenderRequest renderRequest,
092:                    RenderResponse renderResponse) throws PortletException,
093:                    IOException {
094:                helpView.include(renderRequest, renderResponse);
095:            }
096:
097:            public void init(PortletConfig portletConfig)
098:                    throws PortletException {
099:                super .init(portletConfig);
100:                normalView = portletConfig.getPortletContext()
101:                        .getRequestDispatcher(NORMALVIEW_JSP);
102:                maximizedView = portletConfig.getPortletContext()
103:                        .getRequestDispatcher(MAXIMIZEDVIEW_JSP);
104:                helpView = portletConfig.getPortletContext()
105:                        .getRequestDispatcher(HELPVIEW_JSP);
106:                inverse = false;
107:            }
108:
109:            public void destroy() {
110:                normalView = null;
111:                maximizedView = null;
112:                helpView = null;
113:                super .destroy();
114:            }
115:
116:            public String getJSONTrees(boolean inverse) {
117:                List list = getTrees(inverse);
118:                if (list == null)
119:                    return "[]";
120:
121:                StringBuffer stb = new StringBuffer();
122:                stb.append("[");
123:                Hashtable htLinks = new Hashtable();
124:                // First level cannot be a link
125:                for (int i = 0; i < list.size(); i++) {
126:                    StringTree node = (StringTree) list.get(i);
127:                    htLinks.put(node.name, "" + i);
128:                }
129:                for (int i = 0; i < list.size(); i++) {
130:                    StringTree node = (StringTree) list.get(i);
131:                    if (i != 0)
132:                        stb.append(",");
133:                    stb.append(node.toJSONObject("" + i, htLinks, true));
134:                }
135:                stb.append("]");
136:                list = null;
137:                return stb.toString();
138:            }
139:
140:            public ArrayList getTrees(boolean inverse) {
141:                ArrayList parentNodes = new ArrayList();
142:                List list = ClassLoaderRegistry.getList();
143:                Iterator iter = list.iterator();
144:                while (iter.hasNext()) {
145:                    if (!inverse)
146:                        updateTree((ClassLoader) iter.next(), parentNodes);
147:                    else
148:                        inverseTree((ClassLoader) iter.next(), parentNodes);
149:                }
150:                Collections.sort(parentNodes);
151:                return parentNodes;
152:            }
153:
154:            public StringTree inverseTree(ClassLoader classloader,
155:                    ArrayList parentNodes) {
156:
157:                StringTree node = new StringTree(classloader.toString());
158:                int index = parentNodes.indexOf(node);
159:                if (index != -1)
160:                    return (StringTree) parentNodes.get(index);
161:
162:                node = addClasses(node, classloader);
163:
164:                if (classloader instanceof  org.apache.geronimo.kernel.config.MultiParentClassLoader) {
165:                    org.apache.geronimo.kernel.config.MultiParentClassLoader mpclassloader = (org.apache.geronimo.kernel.config.MultiParentClassLoader) classloader;
166:                    ClassLoader[] parents = mpclassloader.getParents();
167:                    if (parents != null)
168:                        for (int i = 0; i < parents.length; i++) {
169:                            StringTree parentNode = inverseTree(parents[i],
170:                                    parentNodes);
171:                            node.addChild(parentNode);
172:                        }
173:                } else if (classloader.getParent() != null) {
174:                    StringTree parentNode = inverseTree(
175:                            classloader.getParent(), parentNodes);
176:                    node.addChild(parentNode);
177:                }
178:                if (!parentNodes.contains(node))
179:                    parentNodes.add(node);
180:
181:                return node;
182:            }
183:
184:            public StringTree updateTree(ClassLoader classloader,
185:                    ArrayList parentNodes) {
186:
187:                Iterator iter = parentNodes.iterator();
188:                StringTree node = null;
189:                while (iter.hasNext()) {
190:                    StringTree currNode = (StringTree) iter.next();
191:                    node = currNode.findNode(classloader.toString());
192:                    if (node != null)
193:                        return node;
194:                }
195:
196:                if (node == null) {
197:                    node = new StringTree(classloader.toString());
198:                    node = addClasses(node, classloader);
199:
200:                    if (classloader instanceof  org.apache.geronimo.kernel.config.MultiParentClassLoader) {
201:                        org.apache.geronimo.kernel.config.MultiParentClassLoader mpclassloader = (org.apache.geronimo.kernel.config.MultiParentClassLoader) classloader;
202:                        ClassLoader[] parents = mpclassloader.getParents();
203:                        if (parents == null)
204:                            parentNodes.add(node);
205:                        else if (parents.length == 0)
206:                            parentNodes.add(node);
207:                        else {
208:                            for (int i = 0; i < parents.length; i++) {
209:                                StringTree parentNode = updateTree(parents[i],
210:                                        parentNodes);
211:                                parentNode.addChild(node);
212:                            }
213:                        }
214:                    } else if (classloader.getParent() != null) {
215:                        StringTree parentNode = updateTree(classloader
216:                                .getParent(), parentNodes);
217:                        parentNode.addChild(node);
218:                    } else
219:                        parentNodes.add(node);
220:                }
221:                return node;
222:            }
223:
224:            private StringTree addClasses(StringTree node, ClassLoader loader) {
225:                try {
226:                    java.lang.reflect.Field CLASSES_VECTOR_FIELD = ClassLoader.class
227:                            .getDeclaredField("classes");
228:
229:                    if (CLASSES_VECTOR_FIELD.getType() != java.util.Vector.class) {
230:                        return node;
231:                    }
232:                    CLASSES_VECTOR_FIELD.setAccessible(true);
233:
234:                    final java.util.Vector classes = (java.util.Vector) CLASSES_VECTOR_FIELD
235:                            .get(loader);
236:                    if (classes == null)
237:                        return node;
238:
239:                    final Class[] result;
240:
241:                    synchronized (classes) {
242:                        result = new Class[classes.size()];
243:                        classes.toArray(result);
244:                    }
245:
246:                    CLASSES_VECTOR_FIELD.setAccessible(false);
247:
248:                    StringTree classNames = new StringTree("Classes");
249:                    StringTree interfaceNames = new StringTree("Interfaces");
250:                    node.addChild(classNames);
251:                    node.addChild(interfaceNames);
252:
253:                    for (int i = 0; i < result.length; i++) {
254:                        if (result[i].isInterface())
255:                            interfaceNames.addChild(result[i].toString());
256:                        else
257:                            classNames.addChild(result[i].toString());
258:                    }
259:
260:                    return node;
261:                } catch (Exception e) {
262:                    return node;
263:                }
264:            }
265:
266:        }
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