svn commit: r1296173 - /openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java

[rm...@apache.org]

Author: rmannibucau
Date: Fri Mar  2 12:42:40 2012
New Revision: 1296173

URL: http://svn.apache.org/viewvc?rev=1296173&view=rev
Log:
OPENEJB-1790 adding classloader command

Added:
    openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java

Added: openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java
URL: http://svn.apache.org/viewvc/openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java?rev=1296173&view=auto
==============================================================================
--- openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java (added)
+++ openejb/trunk/openejb/server/openejb-common-cli/src/main/java/org/apache/openejb/server/cli/command/ClassLoaderCommand.java Fri Mar  2 12:42:40 2012
@@ -0,0 +1,108 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.openejb.server.cli.command;
+
+import org.apache.openejb.AppContext;
+import org.apache.openejb.loader.SystemInstance;
+import org.apache.openejb.spi.ContainerSystem;
+import org.apache.xbean.finder.UrlSet;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+
+@Command(name = ClassLoaderCommand.CLASSLOADER_CMD, usage = ClassLoaderCommand.CLASSLOADER_CMD + " <app>", description = "print classloader info")
+public class ClassLoaderCommand extends AbstractCommand {
+    public static final String CLASSLOADER_CMD = "classloader";
+    private static final String INDENT = "  ";
+
+    @Override
+    public void execute(final String cmd) {
+        final String appName = extractAppName(cmd);
+        final ContainerSystem cs = SystemInstance.get().getComponent(ContainerSystem.class);
+        for (AppContext ctx : cs.getAppContexts()) {
+            if (appName.equalsIgnoreCase(ctx.getId())) {
+                dumpClassLoader(ctx.getClassLoader());
+                return;
+            }
+        }
+        streamManager.writeErr("can't find app " + appName);
+        streamManager.writeErr("available apps are:");
+        for (AppContext ctx : cs.getAppContexts()) {
+            streamManager.writeErr("- " + ctx.getId());
+        }
+    }
+
+    protected void dumpClassLoader(final ClassLoader classLoader) {
+        final List<ClassLoader> classLoaders = new ArrayList<ClassLoader>();
+        ClassLoader current = classLoader;
+        while (current != null) {
+            classLoaders.add(current);
+            current = current.getParent();
+        }
+
+        Collections.reverse(classLoaders);
+
+        for (ClassLoader cl : classLoaders) {
+            streamManager.writeOut("+" + cl.toString());
+
+            UrlSet urls;
+            try {
+                urls = new UrlSet(cl);
+                if (cl.getParent() != null) {
+                    urls = urls.exclude(cl.getParent());
+                }
+            } catch (IOException e) {
+                streamManager.writeErr(INDENT + "` can't get urls of this classloader");
+                continue;
+            }
+
+            final List<URL> listUrls = urls.getUrls();
+            Collections.sort(listUrls, new URLComparator());
+            final Iterator<URL> it = listUrls.iterator();
+            while (it.hasNext()) {
+                final String value = it.next().toExternalForm();
+                final StringBuilder builder = new StringBuilder(INDENT);
+                if (it.hasNext()) {
+                    builder.append('|');
+                } else {
+                    builder.append('`');
+                }
+                builder.append(" ").append(value);
+                streamManager.writeOut(builder.toString());
+            }
+        }
+    }
+
+    protected String extractAppName(final String cmd) {
+        if (CLASSLOADER_CMD.length() == cmd.length()) {
+            return "";
+        }
+        return cmd.substring(CLASSLOADER_CMD.length()).trim();
+    }
+
+    private class URLComparator implements Comparator<URL> {
+        @Override
+        public int compare(final URL o1, URL o2) {
+            return o1.toExternalForm().compareTo(o2.toExternalForm());
+        }
+    }
+}