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Source Code for Apache Log4j API
Apache Log4j API provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation. Apache Log4j API is a required module to use Apache Log4j.
Bytecode (Java 8) for Apache Log4j API is provided in a separate JAR file like log4j-api-2.14.1.jar.
Source Code files for Apache Log4j API are provided in both binary packge like apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. You can download them at Apache Log4j Website.
You can also browse Source Code files for Apache Log4j API 2.14.1 below.
✍: FYIcenter.com
⏎ org/apache/logging/log4j/message/ThreadDumpMessage.java
/* * 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.logging.log4j.message; import java.io.InvalidObjectException; import java.io.ObjectInputStream; import java.io.Serializable; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.ServiceConfigurationError; import java.util.ServiceLoader; import org.apache.logging.log4j.status.StatusLogger; import org.apache.logging.log4j.util.StringBuilderFormattable; import org.apache.logging.log4j.util.Strings; /** * Captures information about all running Threads. */ @AsynchronouslyFormattable public class ThreadDumpMessage implements Message, StringBuilderFormattable { private static final long serialVersionUID = -1103400781608841088L; private static ThreadInfoFactory FACTORY; private volatile Map<ThreadInformation, StackTraceElement[]> threads; private final String title; private String formattedMessage; /** * Generate a ThreadDumpMessage with a title. * @param title The title. */ public ThreadDumpMessage(final String title) { this.title = title == null ? Strings.EMPTY : title; threads = getFactory().createThreadInfo(); } private ThreadDumpMessage(final String formattedMsg, final String title) { this.formattedMessage = formattedMsg; this.title = title == null ? Strings.EMPTY : title; } private static ThreadInfoFactory getFactory() { if (FACTORY == null) { FACTORY = initFactory(ThreadDumpMessage.class.getClassLoader()); } return FACTORY; } private static ThreadInfoFactory initFactory(final ClassLoader classLoader) { final ServiceLoader<ThreadInfoFactory> serviceLoader = ServiceLoader.load(ThreadInfoFactory.class, classLoader); ThreadInfoFactory result = null; try { final Iterator<ThreadInfoFactory> iterator = serviceLoader.iterator(); while (result == null && iterator.hasNext()) { result = iterator.next(); } } catch (ServiceConfigurationError | LinkageError | Exception unavailable) { // if java management classes not available StatusLogger.getLogger().info("ThreadDumpMessage uses BasicThreadInfoFactory: " + "could not load extended ThreadInfoFactory: {}", unavailable.toString()); result = null; } return result == null ? new BasicThreadInfoFactory() : result; } @Override public String toString() { return getFormattedMessage(); } /** * Returns the ThreadDump in printable format. * @return the ThreadDump suitable for logging. */ @Override public String getFormattedMessage() { if (formattedMessage != null) { return formattedMessage; } final StringBuilder sb = new StringBuilder(255); formatTo(sb); return sb.toString(); } @Override public void formatTo(final StringBuilder sb) { sb.append(title); if (title.length() > 0) { sb.append('\n'); } for (final Map.Entry<ThreadInformation, StackTraceElement[]> entry : threads.entrySet()) { final ThreadInformation info = entry.getKey(); info.printThreadInfo(sb); info.printStack(sb, entry.getValue()); sb.append('\n'); } } /** * Returns the title. * @return the title. */ @Override public String getFormat() { return title == null ? Strings.EMPTY : title; } /** * Returns an array with a single element, a Map containing the ThreadInformation as the key. * and the StackTraceElement array as the value; * @return the "parameters" to this Message. */ @Override public Object[] getParameters() { return null; } /** * Creates a ThreadDumpMessageProxy that can be serialized. * @return a ThreadDumpMessageProxy. */ protected Object writeReplace() { return new ThreadDumpMessageProxy(this); } private void readObject(final ObjectInputStream stream) throws InvalidObjectException { throw new InvalidObjectException("Proxy required"); } /** * Proxy pattern used to serialize the ThreadDumpMessage. */ private static class ThreadDumpMessageProxy implements Serializable { private static final long serialVersionUID = -3476620450287648269L; private final String formattedMsg; private final String title; ThreadDumpMessageProxy(final ThreadDumpMessage msg) { this.formattedMsg = msg.getFormattedMessage(); this.title = msg.title; } /** * Returns a ThreadDumpMessage using the data in the proxy. * @return a ThreadDumpMessage. */ protected Object readResolve() { return new ThreadDumpMessage(formattedMsg, title); } } /** * Factory to create Thread information. * <p> * Implementations of this class are loaded via the standard java Service Provider interface. * </p> * @see /log4j-core/src/main/resources/META-INF/services/org.apache.logging.log4j.message.ThreadDumpMessage$ThreadInfoFactory */ public static interface ThreadInfoFactory { Map<ThreadInformation, StackTraceElement[]> createThreadInfo(); } /** * Factory to create basic thread information. */ private static class BasicThreadInfoFactory implements ThreadInfoFactory { @Override public Map<ThreadInformation, StackTraceElement[]> createThreadInfo() { final Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces(); final Map<ThreadInformation, StackTraceElement[]> threads = new HashMap<>(map.size()); for (final Map.Entry<Thread, StackTraceElement[]> entry : map.entrySet()) { threads.put(new BasicThreadInformation(entry.getKey()), entry.getValue()); } return threads; } } /** * Always returns null. * * @return null */ @Override public Throwable getThrowable() { return null; } }
⏎ org/apache/logging/log4j/message/ThreadDumpMessage.java
Or download all of them as a single archive file:
File name: log4j-api-2.14.1-sources.jar File size: 264773 bytes Release date: 2021-03-06 Download
⇒ Source Code for Apache Log4j Core Implementation
⇐ Downloading Apache Log4j Binary Package
2015-11-17, 30719👍, 0💬
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