/**
* 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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import storm.kafka.trident.IBrokerReader;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
public class DynamicPartitionConnections {
public static final Logger LOG = LoggerFactory.getLogger(DynamicPartitionConnections.class);
static class ConnectionInfo {
SimpleConsumer consumer;
Set<Integer> partitions = new HashSet();
public ConnectionInfo(SimpleConsumer consumer) {
this.consumer = consumer;
}
}
Map<Broker, ConnectionInfo> _connections = new HashMap();
KafkaConfig _config;
IBrokerReader _reader;
public DynamicPartitionConnections(KafkaConfig config, IBrokerReader brokerReader) {
_config = config;
_reader = brokerReader;
}
public SimpleConsumer register(Partition partition) {
Broker broker = _reader.getCurrentBrokers().getBrokerFor(partition.partition);
return register(broker, partition.partition);
}
public SimpleConsumer register(Broker host, int partition) {
if (!_connections.containsKey(host)) {
_connections.put(host, new ConnectionInfo(new SimpleConsumer(host.host, host.port, _config.socketTimeoutMs, _config.bufferSizeBytes, _config.clientId)));
}
ConnectionInfo info = _connections.get(host);
info.partitions.add(partition);
return info.consumer;
}
public SimpleConsumer getConnection(Partition partition) {
ConnectionInfo info = _connections.get(partition.host);
if (info != null) {
return info.consumer;
}
return null;
}
public void unregister(Broker port, int partition) {
ConnectionInfo info = _connections.get(port);
info.partitions.remove(partition);
if (info.partitions.isEmpty()) {
info.consumer.close();
_connections.remove(port);
}
}
public void unregister(Partition partition) {
unregister(partition.host, partition.partition);
}
public void clear() {
for (ConnectionInfo info : _connections.values()) {
info.consumer.close();
}
_connections.clear();
}
}