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ThreadViewer.java
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ThreadViewer.java
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/*
* Copyright 2011-2023 the original author or authors.
*
* Licensed 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.appng.application.manager.business.webservice;
import java.util.Map;
import org.appng.api.BusinessException;
import org.appng.api.Environment;
import org.appng.api.Request;
import org.appng.api.Webservice;
import org.appng.api.model.Application;
import org.appng.api.model.Site;
import org.appng.api.model.Subject;
import org.springframework.stereotype.Component;
@Component
public class ThreadViewer implements Webservice {
private static final String PERM_PLATFORM_THREADS = "platform.threads";
public byte[] processRequest(Site site, Application application, Environment environment, Request request)
throws BusinessException {
String result = "";
Subject subject = environment.getSubject();
boolean hasPermission = request.getPermissionProcessor().hasPermission(PERM_PLATFORM_THREADS);
if (subject != null && subject.isAuthenticated() && hasPermission) {
String threadName = request.getParameter("name");
String trace = request.getParameter("trace");
result = getThreadDump(threadName, trace);
}
return result.getBytes();
}
String getThreadDump(String threadName, String trace) {
StringBuilder result = new StringBuilder();
Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces();
for (Map.Entry<Thread, StackTraceElement[]> threadEntry : map.entrySet()) {
Thread t = threadEntry.getKey();
StringBuilder traceBuilder = new StringBuilder();
if (null == threadName || threadName.equals(t.getName())) {
traceBuilder.append("#" + t.getId() + " " + t.getName() + ":" + t.getState());
traceBuilder.append(" (alive: " + t.isAlive() + ", ");
traceBuilder.append("daemon: " + t.isDaemon() + ", ");
traceBuilder.append("interrupted: " + t.isInterrupted());
ClassLoader classLoader = t.getContextClassLoader();
if (null != classLoader) {
traceBuilder.append(
", classloader: " + classLoader.getClass().getSimpleName() + "#" + classLoader.hashCode());
}
traceBuilder.append(")");
traceBuilder.append(Constants.NEW_LINE);
for (StackTraceElement element : threadEntry.getValue()) {
traceBuilder.append("\t" + element);
traceBuilder.append(Constants.NEW_LINE);
}
if (null == trace || traceBuilder.toString().contains(trace)) {
result.append(traceBuilder.toString());
result.append(Constants.NEW_LINE);
}
}
}
return result.toString();
}
public String getContentType() {
return "text/plain";
}
}