Java tutorial
/** * 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 skewtune.mapreduce.server.jobtracker; import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceStability; import org.apache.hadoop.mapreduce.MRConfig; /** * Place holder for JobTracker server-level configuration. * * The keys should have "mapreduce.jobtracker." as the prefix */ public interface JTConfig extends MRConfig { // JobTracker configuration parameters public static final String JT_IPC_ADDRESS = "skewtune.jobtracker.address"; public static final String JT_HTTP_ADDRESS = "skewtune.jobtracker.http.address"; public static final String JT_IPC_HANDLER_COUNT = "skewtune.jobtracker.handler.count"; public static final String JT_RESTART_ENABLED = "skewtune.jobtracker.restart.recover"; public static final String JT_HEARTBEATS_IN_SECOND = "skewtune.jobtracker.heartbeats.in.second"; public static final String JT_HEARTBEATS_SCALING_FACTOR = "skewtune.jobtracker.heartbeats.scaling.factor"; public static final String JT_USER_NAME = org.apache.hadoop.mapreduce.server.jobtracker.JTConfig.JT_USER_NAME; public static final String JT_KEYTAB_FILE = org.apache.hadoop.mapreduce.server.jobtracker.JTConfig.JT_KEYTAB_FILE; public static final String JT_SYSTEM_DIR = org.apache.hadoop.mapreduce.server.jobtracker.JTConfig.JT_SYSTEM_DIR; public static final String JT_STAGING_AREA_ROOT = org.apache.hadoop.mapreduce.server.jobtracker.JTConfig.JT_STAGING_AREA_ROOT; public static final String JT_MAX_ASYNC_WORKER_FACTOR = "skewtune.jobtracker.asyncworker.maxfactor"; public static final String JT_HEARTBEATS_DUMP = "skewtune.jobtracker.heartbeats.dump"; public static final String JT_SPECULATIVE_SPLIT = "skewtune.jobtracker.speculative.split"; }