/*
* 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.chukwa.datacollection;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import org.apache.hadoop.chukwa.datacollection.agent.MemLimitQueue;
import org.apache.hadoop.chukwa.datacollection.sender.RetryListOfCollectors;
import org.apache.log4j.Logger;
public class DataFactory {
static Logger log = Logger.getLogger(DataFactory.class);
static final int QUEUE_SIZE_KB = 10 * 1024;
static final String COLLECTORS_FILENAME = "collectors";
private static DataFactory dataFactory = null;
private ChunkQueue chunkQueue = null;
private String defaultTags = "";
static {
dataFactory = new DataFactory();
}
private DataFactory() {
}
public static DataFactory getInstance() {
return dataFactory;
}
public synchronized ChunkQueue getEventQueue() {
if (chunkQueue == null) {
chunkQueue = new MemLimitQueue(QUEUE_SIZE_KB * 1024);
}
return chunkQueue;
}
public String getDefaultTags() {
return defaultTags;
}
public void addDefaultTag(String tag) {
this.defaultTags += " " + tag.trim();
}
/**
* @return empty list if file does not exist
* @throws IOException on other error
*/
public Iterator<String> getCollectorURLs() throws IOException {
String chukwaHome = System.getenv("CHUKWA_HOME");
if (chukwaHome == null) {
chukwaHome = ".";
}
if (!chukwaHome.endsWith("/")) {
chukwaHome = chukwaHome + File.separator;
}
log.info("Config - System.getenv(\"CHUKWA_HOME\"): [" + chukwaHome + "]");
String chukwaConf = System.getenv("CHUKWA_CONF_DIR");
if (chukwaConf == null) {
chukwaConf = chukwaHome + "conf" + File.separator;
}
log.info("Config - System.getenv(\"chukwaConf\"): [" + chukwaConf + "]");
log.info("setting up collectors file: " + chukwaConf + File.separator
+ COLLECTORS_FILENAME);
File collectors = new File(chukwaConf + File.separator + "collectors");
try {
return new RetryListOfCollectors(collectors, 1000 * 15);// time is ms
// between tries
} catch (java.io.IOException e) {
log.error("failed to read collectors file: ", e);
throw e;
}
}
}