| /** |
| * 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.bolt; |
| |
| import com.datastax.driver.core.Statement; |
| import java.util.List; |
| import org.apache.storm.cassandra.executor.AsyncResultHandler; |
| import org.apache.storm.cassandra.executor.impl.SingleAsyncResultHandler; |
| import org.apache.storm.cassandra.query.CQLStatementTupleMapper; |
| import org.apache.storm.tuple.Tuple; |
| |
| public class CassandraWriterBolt extends BaseCassandraBolt<Tuple> { |
| |
| private AsyncResultHandler<Tuple> asyncResultHandler; |
| |
| /** |
| * Creates a new {@link CassandraWriterBolt} instance. |
| */ |
| public CassandraWriterBolt(CQLStatementTupleMapper tupleMapper) { |
| super(tupleMapper); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected AsyncResultHandler<Tuple> getAsyncHandler() { |
| if (asyncResultHandler == null) { |
| asyncResultHandler = new SingleAsyncResultHandler(getResultHandler()); |
| } |
| return asyncResultHandler; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void process(Tuple input) { |
| List<Statement> statements = getMapper().map(topoConfig, session, input); |
| if (statements.size() == 1) { |
| getAsyncExecutor().execAsync(statements.get(0), input); |
| } else { |
| getAsyncExecutor().execAsync(statements, input); |
| } |
| } |
| } |
| |
| |
| |