| /** |
| * 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.cassandra; |
| |
| import com.datastax.driver.core.Cluster; |
| import java.util.Map; |
| import org.apache.storm.cassandra.client.CassandraConf; |
| import org.apache.storm.cassandra.client.ClusterFactory; |
| import org.apache.storm.cassandra.client.SimpleClient; |
| import org.apache.storm.cassandra.client.SimpleClientProvider; |
| import org.apache.storm.cassandra.client.impl.DefaultClient; |
| import org.apache.storm.cassandra.context.BaseBeanFactory; |
| import org.apache.storm.cassandra.context.WorkerCtx; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class CassandraContext extends WorkerCtx implements SimpleClientProvider { |
| |
| /** |
| * Creates a new {@link CassandraContext} instance. |
| */ |
| public CassandraContext() { |
| register(SimpleClient.class, new ClientFactory()); |
| register(CassandraConf.class, new CassandraConfFactory()); |
| register(Cluster.class, new ClusterFactory()); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public SimpleClient getClient(Map<String, Object> config) { |
| SimpleClient client = getWorkerBean(SimpleClient.class, config); |
| if (client.isClose()) { |
| client = getWorkerBean(SimpleClient.class, config, true); |
| } |
| return client; |
| } |
| |
| /** |
| * Simple class to make {@link CassandraConf} from a Storm topology configuration. |
| */ |
| public static final class CassandraConfFactory extends BaseBeanFactory<CassandraConf> { |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected CassandraConf make(Map<String, Object> topoConf) { |
| return new CassandraConf(topoConf); |
| } |
| } |
| |
| /** |
| * Simple class to make {@link ClientFactory} from a Storm topology configuration. |
| */ |
| public static final class ClientFactory extends BaseBeanFactory<SimpleClient> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ClientFactory.class); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected SimpleClient make(Map<String, Object> topoConf) { |
| Cluster cluster = this.context.getWorkerBean(Cluster.class, topoConf); |
| if (cluster.isClosed()) { |
| LOG.warn("Cluster is closed - trigger new initialization!"); |
| cluster = this.context.getWorkerBean(Cluster.class, topoConf, true); |
| } |
| CassandraConf config = this.context.getWorkerBean(CassandraConf.class, topoConf); |
| return new DefaultClient(cluster, config.getKeyspace()); |
| } |
| } |
| } |