| /** |
| * 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.hadoop.mapred.nativetask; |
| |
| import java.io.IOException; |
| |
| import com.google.common.base.Charsets; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.DataInputBuffer; |
| import org.apache.hadoop.io.FloatWritable; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.Task.TaskReporter; |
| import org.apache.hadoop.mapred.nativetask.util.ConfigUtil; |
| import org.apache.hadoop.util.VersionInfo; |
| |
| /** |
| * This class stands for the native runtime It has three functions: |
| * 1. Create native handlers for map, reduce, outputcollector, etc |
| * 2. Configure native task with provided MR configs |
| * 3. Provide file system api to native space, so that it can use File system like HDFS. |
| */ |
| @InterfaceAudience.Private |
| public class NativeRuntime { |
| private static Log LOG = LogFactory.getLog(NativeRuntime.class); |
| private static boolean nativeLibraryLoaded = false; |
| |
| private static Configuration conf = new Configuration(); |
| |
| static { |
| try { |
| System.loadLibrary("nativetask"); |
| LOG.info("Nativetask JNI library loaded."); |
| nativeLibraryLoaded = true; |
| } catch (final Throwable t) { |
| // Ignore failures |
| LOG.error("Failed to load nativetask JNI library with error: " + t); |
| LOG.info("java.library.path=" + System.getProperty("java.library.path")); |
| LOG.info("LD_LIBRARY_PATH=" + System.getenv("LD_LIBRARY_PATH")); |
| } |
| } |
| |
| private static void assertNativeLibraryLoaded() { |
| if (!nativeLibraryLoaded) { |
| throw new RuntimeException("Native runtime library not loaded"); |
| } |
| } |
| |
| public static boolean isNativeLibraryLoaded() { |
| return nativeLibraryLoaded; |
| } |
| |
| public static void configure(Configuration jobConf) { |
| assertNativeLibraryLoaded(); |
| conf = new Configuration(jobConf); |
| conf.set(Constants.NATIVE_HADOOP_VERSION, VersionInfo.getVersion()); |
| JNIConfigure(ConfigUtil.toBytes(conf)); |
| } |
| |
| /** |
| * create native object We use it to create native handlers |
| */ |
| public synchronized static long createNativeObject(String clazz) { |
| assertNativeLibraryLoaded(); |
| final long ret = JNICreateNativeObject(clazz.getBytes(Charsets.UTF_8)); |
| if (ret == 0) { |
| LOG.warn("Can't create NativeObject for class " + clazz + ", probably not exist."); |
| } |
| return ret; |
| } |
| |
| /** |
| * Register a customized library |
| */ |
| public synchronized static long registerLibrary(String libraryName, String clazz) { |
| assertNativeLibraryLoaded(); |
| final long ret = JNIRegisterModule(libraryName.getBytes(Charsets.UTF_8), |
| clazz.getBytes(Charsets.UTF_8)); |
| if (ret != 0) { |
| LOG.warn("Can't create NativeObject for class " + clazz + ", probably not exist."); |
| } |
| return ret; |
| } |
| |
| /** |
| * destroy native object We use to destory native handlers |
| */ |
| public synchronized static void releaseNativeObject(long addr) { |
| assertNativeLibraryLoaded(); |
| JNIReleaseNativeObject(addr); |
| } |
| |
| /** |
| * Get the status report from native space |
| */ |
| public static void reportStatus(TaskReporter reporter) throws IOException { |
| assertNativeLibraryLoaded(); |
| synchronized (reporter) { |
| final byte[] statusBytes = JNIUpdateStatus(); |
| final DataInputBuffer ib = new DataInputBuffer(); |
| ib.reset(statusBytes, statusBytes.length); |
| final FloatWritable progress = new FloatWritable(); |
| progress.readFields(ib); |
| reporter.setProgress(progress.get()); |
| final Text status = new Text(); |
| status.readFields(ib); |
| if (status.getLength() > 0) { |
| reporter.setStatus(status.toString()); |
| } |
| final IntWritable numCounters = new IntWritable(); |
| numCounters.readFields(ib); |
| if (numCounters.get() == 0) { |
| return; |
| } |
| final Text group = new Text(); |
| final Text name = new Text(); |
| final LongWritable amount = new LongWritable(); |
| for (int i = 0; i < numCounters.get(); i++) { |
| group.readFields(ib); |
| name.readFields(ib); |
| amount.readFields(ib); |
| reporter.incrCounter(group.toString(), name.toString(), amount.get()); |
| } |
| } |
| } |
| |
| |
| /******************************************************* |
| *** The following are JNI Apis |
| ********************************************************/ |
| |
| /** |
| * Check whether the native side has compression codec support built in |
| */ |
| public native static boolean supportsCompressionCodec(byte[] codec); |
| |
| /** |
| * Config the native runtime with mapreduce job configurations. |
| */ |
| private native static void JNIConfigure(byte[][] configs); |
| |
| /** |
| * create a native object in native space |
| */ |
| private native static long JNICreateNativeObject(byte[] clazz); |
| |
| /** |
| * create the default native object for certain type |
| */ |
| @Deprecated |
| private native static long JNICreateDefaultNativeObject(byte[] type); |
| |
| /** |
| * destroy native object in native space |
| */ |
| private native static void JNIReleaseNativeObject(long addr); |
| |
| /** |
| * Get status update from native side |
| * Encoding: |
| * progress:float |
| * status:Text |
| * number: int the count of the counters |
| * Counters: array [group:Text, name:Text, incrCount:Long] |
| */ |
| private native static byte[] JNIUpdateStatus(); |
| |
| /** |
| * Not used. |
| */ |
| private native static void JNIRelease(); |
| |
| /** |
| * Not used. |
| */ |
| private native static int JNIRegisterModule(byte[] path, byte[] name); |
| } |