Java tutorial
/** * Licensed to Cloudera, Inc. under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. Cloudera, Inc. 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 com.s2m.ludwig.conf; import java.io.File; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This is the configuration file for OSS. It uses hadoop's xml schema for * properties. The default configuration is in $OSS_HOME/oss-conf.xml and is * a singleton. * * NOTE: The logging system gets configuration information from this file and * thus depends on this being initialized. So no logging events are allowed when * this is being initialized. If logger is used, an infinite recursion happens * and causes a stack overflow. */ public class OSSConfiguration extends Configuration { protected static final Logger LOG = LoggerFactory.getLogger(OSSConfiguration.class); private static OSSConfiguration singleton; /** * Returns the 'OSS_HOME' location. Taken in order of precedence: * * - Java system property 'oss.home' * * - $OSS_HOME in the environment. * * - null if neither of these are set. */ public static String getOSSHome() { String OSSHome = System.getProperty("oss.home"); if (null == OSSHome) { OSSHome = System.getenv("OSS_HOME"); } if (null == OSSHome) { LOG.warn("-Doss.home and $OSS_HOME both unset"); } return OSSHome; } /** * Returns the 'OSS_CONF_DIR' location. Taken in order of precedence: * * - Java system property 'oss.conf.dir' * * - $OSS_CONF_DIR in the environment * * - getOSSHome()/conf * * - ./conf */ public static String getOSSConfDir() { String OSSConfDir = System.getProperty("oss.conf.dir"); if (null == OSSConfDir) { OSSConfDir = System.getenv("OSS_CONF_DIR"); } if (null == OSSConfDir) { String ossHome = getOSSHome(); if (null != ossHome) { OSSConfDir = new File(ossHome, "conf").toString(); } else { OSSConfDir = "./conf"; } } return OSSConfDir; } public synchronized static OSSConfiguration get() { if (singleton == null) singleton = new OSSConfiguration(); return singleton; } protected OSSConfiguration() { this(true); } protected OSSConfiguration(boolean loadDefaults) { super(); if (loadDefaults) { Path conf = new Path(getOSSConfDir()); LOG.info("Loading configurations from " + conf); super.addResource(new Path(conf, "oss-conf.xml")); super.addResource(new Path(conf, "oss-site.xml")); } } // COOCCUR COMPUTATION SETTINGS public static final String WINDOW_SIZE = "oss.twitter.cooccur.window_size"; public static final String STOPWORDS_PATH = "oss.twitter.coccur.stopwords_path"; // AGENT SETTINGS public static final String NUMBER_OF_AGENTS = "oss.twitter.agent.number"; public static final String NUMBER_OF_THREADS_PER_AGENT = "oss.twitter.agent.threads_number"; // TP SETTINGS public static final String NUMBER_OF_TERM_TP = "oss.twitter.agent.partitions_number"; public static final String TP_THRESHOLD = "oss.twitter.agent.tp_threshold"; // COLLECTOR SETTINGS public static final String NUMBER_OF_SAME_COLLECTORS = "oss.twitter.collector.same_number"; public static final String NUMBER_OF_DIFFERENT_COLLECTORS = "oss.twitter.collector.different_number"; public static final String NUMBER_OF_THREADS_PER_COLLECTOR = "oss.twitter.collector.threads_number"; // STREAM SETTINGS public static final String MESSAGE_SIZE = "oss.twitter.message_size"; // TWITTER STREAM SETTINGS public static final String TWITTER_STREAM_URL = "oss.twitter.url"; public static final String TWITTER_USER = "oss.twitter.username"; public static final String TWITTER_PW = "oss.twitter.password"; /** * The size of cooccur window, default = 1. */ public int getWindowSize() { return getInt(WINDOW_SIZE, 1); } public String getStopwordsPath() { return STOPWORDS_PATH; } /** * Number of Agents, default = 3. */ public int getNumberOfAgents() { return getInt(NUMBER_OF_AGENTS, 3); } /** * Number of threads per Agent, default = 3. */ public int getNumberOfThreadsPerAgent() { return getInt(NUMBER_OF_THREADS_PER_AGENT, 3); } /** * Number of TP for an agent, default = 10000. */ public int getNumberOfTP() { return getInt(NUMBER_OF_TERM_TP, 10000); } /** * This is the threshold after which a TP has to be emptied and its * cooccur send to the broker, default = 100000. */ public int getTPThreshold() { return getInt(TP_THRESHOLD, 100000); } /** * Number of collectors for each type, default = 3. */ public int getNumberOfSameCollectors() { return getInt(NUMBER_OF_SAME_COLLECTORS, 3); } /** * Number of different types of collectors, default = 3. */ public int getNumberOfDifferentCollectors() { return getInt(NUMBER_OF_SAME_COLLECTORS, 3); } /** * Number of threads per Agent, default = 3. */ public int getNumberOfThreadsPerCollector() { return getInt(NUMBER_OF_THREADS_PER_COLLECTOR, 3); } public String getTwitterName() { return get(TWITTER_USER); } public String getTwitterPW() { return get(TWITTER_PW); } public String getTwitterURL() { return get(TWITTER_STREAM_URL, "http://stream.twitter.com/1/statuses/sample.json"); } public int getMessageSize() { return getInt(NUMBER_OF_THREADS_PER_COLLECTOR, 10); } public Object getStreamSource() { // TODO Auto-generated method stub return null; } }