/*
* 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.sirona.reporting.web.plugin.thread;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.sirona.reporting.web.plugin.api.MapBuilder;
import org.apache.sirona.reporting.web.plugin.api.Regex;
import org.apache.sirona.reporting.web.plugin.api.Template;
import java.util.Map;
import java.util.TreeMap;
public class ThreadEndpoints {
@Regex
public Template home() {
return new Template("threads/threads.vm", new MapBuilder<String, Object>()
.set("threads", listThreads())
.build());
}
@Regex("/([^/]*)")
public Template dump(final String name) {
final Thread thread = findThread(new String(Base64.decodeBase64(name)));
if (thread == null) {
return new Template("templates/threads/thread.vm", new MapBuilder<String, Object>().set("state", "Not found").build(), false);
}
return new Template(
"templates/threads/thread.vm",
new MapBuilder<String, Object>().set("state", thread.getState().name()).set("dump", StringEscapeUtils.escapeHtml4(dump(thread))).build(),
false);
}
private static Thread findThread(final String name) {
int count = Thread.activeCount();
final Thread[] threads = new Thread[count];
count = Thread.enumerate(threads);
for (int i = 0; i < count; i++) {
if (threads[i].getName().equals(name)) {
return threads[i];
}
}
return null;
}
private static String dump(final Thread thread) {
final StackTraceElement[] stack = thread.getStackTrace();
final StringBuilder builder = new StringBuilder();
for (final StackTraceElement element : stack) {
builder.append(element.toString()).append("\n"); // toString method is fine
}
return builder.toString();
}
private static Map<String, String> listThreads() {
final Map<String, String> out = new TreeMap<String, String>();
int count = Thread.activeCount();
final Thread[] threads = new Thread[count];
count = Thread.enumerate(threads);
for (int i = 0; i < count; i++) {
final String name = threads[i].getName();
out.put(name, Base64.encodeBase64URLSafeString(name.getBytes()));
}
return out;
}
}