external/storm-kafka/src/jvm/storm/kafka/StaticPartitionConnections.java

/**
 * 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 storm.kafka;

import kafka.javaapi.consumer.SimpleConsumer;

import java.util.HashMap;
import java.util.Map;

public class StaticPartitionConnections {
    Map<Integer, SimpleConsumer> _kafka = new HashMap<Integer, SimpleConsumer>();
    KafkaConfig _config;
    StaticHosts hosts;

    public StaticPartitionConnections(KafkaConfig conf) {
        _config = conf;
        if (!(conf.hosts instanceof StaticHosts)) {
            throw new RuntimeException("Must configure with static hosts");
        }
        this.hosts = (StaticHosts) conf.hosts;
    }

    public SimpleConsumer getConsumer(int partition) {
        if (!_kafka.containsKey(partition)) {
            Broker hp = hosts.getPartitionInformation().getBrokerFor(partition);
            _kafka.put(partition, new SimpleConsumer(hp.host, hp.port, _config.socketTimeoutMs, _config.bufferSizeBytes, _config.clientId));

        }
        return _kafka.get(partition);
    }

    public void close() {
        for (SimpleConsumer consumer : _kafka.values()) {
            consumer.close();
        }
    }
}