diff options
Diffstat (limited to 'kamon-sigar/src/main/java/kamon/sigar/SigarAgent.java')
| -rw-r--r-- | kamon-sigar/src/main/java/kamon/sigar/SigarAgent.java | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/kamon-sigar/src/main/java/kamon/sigar/SigarAgent.java b/kamon-sigar/src/main/java/kamon/sigar/SigarAgent.java deleted file mode 100644 index f80ca8d2..00000000 --- a/kamon-sigar/src/main/java/kamon/sigar/SigarAgent.java +++ /dev/null @@ -1,175 +0,0 @@ -/* ========================================================================================= - * Copyright © 2013-2014 the kamon project <http://kamon.io/> - * - * 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 kamon.sigar; - -import java.io.File; -import java.io.FileOutputStream; -import java.io.InputStream; -import java.io.OutputStream; -import java.lang.instrument.Instrumentation; -import java.util.logging.Logger; - -import org.hyperic.sigar.Sigar; -import org.hyperic.sigar.SigarLoader; - -/** - * ### Kamon Sigar 1) agent 2) extractor 3) loader. - * - * To load as JVM agent: - * - * <pre> - * java -javaagent:/path/to/kamon-sigar.jar=/path/to/sigar/extract/folder ... - * </pre> - */ -public class SigarAgent { - - private static final Logger logger = Logger.getLogger(SigarAgent.class - .getName()); - - /** Agent command line options. */ - private static volatile String options; - - /** Agent injected JVM instrumentation. */ - private static volatile Instrumentation instrumentation; - - /** - * Location of native libraries. - * - * <pre> - * when stored in kamon-sigar.jar: /${LIB_DIR}/libsigar-xxx.so - * after agent default extraction: ${user.dir}/${LIB_DIR}/libsigar-xxx.so - * </pre> - */ - public static final String LIB_DIR = "native"; - - static final int EOF = -1; - static final int SIZE = 10 * 1024; - - /** Perform stream copy. */ - public static void transfer(final InputStream input, - final OutputStream output) throws Exception { - final byte[] data = new byte[SIZE]; - while (true) { - final int count = input.read(data, 0, SIZE); - if (count == EOF) { - break; - } - output.write(data, 0, count); - } - } - - /** Default sigar library extract location. */ - public static String defaultLocation() { - return System.getProperty("user.dir") + File.separator + LIB_DIR; - } - - /** Extract and load native sigar library in the default folder. */ - public static void provision() throws Exception { - provision(new File(defaultLocation())); - } - - /** Extract and load native sigar library in the provided folder. */ - public static void provision(final File folder) throws Exception { - - if (!folder.exists()) { - folder.mkdirs(); - } - - final SigarLoader sigarLoader = new SigarLoader(Sigar.class); - - /** Library name for given architecture. */ - final String libraryName = sigarLoader.getLibraryName(); - - /** Library location embedded in the jar class path. */ - final String sourcePath = "/" + LIB_DIR + "/" + libraryName; - - /** Absolute path to the extracted library the on file system. */ - final File targetPath = new File(folder, libraryName).getAbsoluteFile(); - - /** Extract library form the jar to the local file system. */ - final InputStream sourceStream = SigarAgent.class - .getResourceAsStream(sourcePath); - final OutputStream targetStream = new FileOutputStream(targetPath); - transfer(sourceStream, targetStream); - sourceStream.close(); - targetStream.close(); - - /** Load library via absolute path. */ - final String libraryPath = targetPath.getAbsolutePath(); - System.load(libraryPath); - - /** Tell sigar loader that the library is already loaded. */ - System.setProperty("org.hyperic.sigar.path", "-"); - sigarLoader.load(); - - logger.info("Sigar library provisioned: " + libraryPath); - - } - - /** Contract: starting agents after JVM startup. */ - public static void agentmain(final String options, - final Instrumentation instrumentation) throws Exception { - logger.info("Sigar loader via agent-main."); - configure(options, instrumentation); - } - - /** Contract: starting agents via command-line interface. */ - public static void premain(final String options, - final Instrumentation instrumentation) throws Exception { - logger.info("Sigar loader via pre-main."); - configure(options, instrumentation); - } - - /** Agent mode configuration. */ - public static synchronized void configure(final String options, - final Instrumentation instrumentation) throws Exception { - - if (SigarAgent.instrumentation != null) { - logger.severe("Duplicate agent setup attempt."); - return; - } - - SigarAgent.options = options; - SigarAgent.instrumentation = instrumentation; - - logger.info("Sigar loader options: " + options); - - final String location; - if (options == null) { - logger.info("Sigar using default library extract location."); - location = defaultLocation(); - } else { - logger.info("Sigar using provided library extract location."); - location = options; - } - - final File folder = new File(location); - - provision(folder); - - } - - /** Agent command line options. */ - public static String options() { - return options; - } - - /** Injected JVM instrumentation instance. */ - public static Instrumentation instrumentation() { - return instrumentation; - } - -} |