/**
* 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.storm.hbase.bolt;
import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.base.BaseRichBolt;
import org.apache.commons.lang.Validate;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.storm.hbase.bolt.mapper.HBaseMapper;
import org.apache.storm.hbase.common.HBaseClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
// TODO support more configuration options, for now we're defaulting to the hbase-*.xml files found on the classpath
public abstract class AbstractHBaseBolt extends BaseRichBolt {
private static final Logger LOG = LoggerFactory.getLogger(AbstractHBaseBolt.class);
protected OutputCollector collector;
protected transient HBaseClient hBaseClient;
protected String tableName;
protected HBaseMapper mapper;
protected String configKey;
public AbstractHBaseBolt(String tableName, HBaseMapper mapper) {
Validate.notEmpty(tableName, "Table name can not be blank or null");
Validate.notNull(mapper, "mapper can not be null");
this.tableName = tableName;
this.mapper = mapper;
}
@Override
public void prepare(Map map, TopologyContext topologyContext, OutputCollector collector) {
this.collector = collector;
final Configuration hbConfig = HBaseConfiguration.create();
Map<String, Object> conf = (Map<String, Object>)map.get(this.configKey);
if(conf == null) {
throw new IllegalArgumentException("HBase configuration not found using key '" + this.configKey + "'");
}
if(conf.get("hbase.rootdir") == null) {
LOG.warn("No 'hbase.rootdir' value found in configuration! Using HBase defaults.");
}
for(String key : conf.keySet()) {
hbConfig.set(key, String.valueOf(conf.get(key)));
}
this.hBaseClient = new HBaseClient(conf, hbConfig, tableName);
}
}