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Source Code for SLF4J Extensions
SLF4J Extensions is a library of 3 components: Profiler, Extended logger, Event Logging, Logging added with Java agent.
Here is the source code for SLF4J Extensions You can download its pre-compiled version slf4j-ext-2.0.4.jar at SLF4J Download Website.
✍: FYIcenter.com
⏎ org/slf4j/agent/AgentPremain.java
/** * Copyright (c) 2004-2011 QOS.ch * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ package org.slf4j.agent; import java.io.ByteArrayInputStream; import java.io.IOException; import java.lang.instrument.Instrumentation; import java.util.Date; import java.util.Properties; import org.slf4j.instrumentation.LogTransformer; /** * Entry point for slf4j-ext when used as a Java agent. * */ public class AgentPremain { /** * JavaAgent premain entry point as specified in the MANIFEST.MF file. See * <a href="http://java.sun.com/javase/6/docs/api/java/lang/instrument/package-summary.html">http://java.sun.com/javase/6/docs/api/java/lang/instrument/package-summary.html</a> for details. * * @param agentArgument * string provided after "=" up to first space * @param instrumentation * instrumentation environment provided by the JVM */ public static void premain(String agentArgument, Instrumentation instrumentation) { // We cannot do sanity checks for slf4j here as the jars loaded // by the application are not visible here. LogTransformer.Builder builder = new LogTransformer.Builder(); builder = builder.addEntryExit(true); if (agentArgument != null) { Properties args = parseArguments(agentArgument, ","); if (args.containsKey(AgentOptions.VERBOSE)) { builder = builder.verbose(true); } if (args.containsKey(AgentOptions.TIME)) { printStartStopTimes(); } if (args.containsKey(AgentOptions.IGNORE)) { String ignore = args.getProperty(AgentOptions.IGNORE); builder = builder.ignore(ignore.split(":")); } if (args.containsKey(AgentOptions.LEVEL)) { builder = builder.level(args.getProperty(AgentOptions.LEVEL)); } } instrumentation.addTransformer(builder.build()); } /** * Consider the argument string to be a property file (by converting the * splitter character to line feeds), and then reading it like any other * property file. * * * @param agentArgument * string given by instrumentation framework * @param separator * String to convert to line feeds * @return argument converted to properties */ private static Properties parseArguments(String agentArgument, String separator) { Properties p = new Properties(); try { String argumentAsLines = agentArgument.replaceAll(separator, "\n"); p.load(new ByteArrayInputStream(argumentAsLines.getBytes())); } catch (IOException e) { String s = "Could not load arguments as properties"; throw new RuntimeException(s, e); } return p; } /** * Print the start message to System.err with the time NOW, and register a * shutdown hook which will print the stop message to System.err with the * time then and the number of milliseconds passed since. * */ private static void printStartStopTimes() { final long start = System.currentTimeMillis(); System.err.println("Start at " + new Date()); Thread hook = new Thread(() -> { long timePassed = System.currentTimeMillis() - start; System.err.println("Stop at " + new Date() + ", execution time = " + timePassed + " ms"); }); Runtime.getRuntime().addShutdownHook(hook); } }
⏎ org/slf4j/agent/AgentPremain.java
Or download all of them as a single archive file:
File name: slf4j-ext-2.0.4-sources.jar File size: 38189 bytes Release date: 2022-11-17 Download
⇒ Source Code for SLF4J Migrator
⇐ Source Code for SLF4J Bridge to JDK
2013-09-05, 4741👍, 0💬
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