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/**
* 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.topology;
import java.util.Map;
import java.util.logging.Logger;
import org.apache.heron.api.topology.IUpdatable;
import org.apache.storm.task.OutputCollectorImpl;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.tuple.TupleImpl;
import org.apache.storm.utils.ConfigUtils;
/**
* When writing topologies using Java, {@link IRichBolt} and {@link IRichSpout} are the main interfaces
* to use to implement components of the topology.
*/
public class IRichBoltDelegate implements org.apache.heron.api.bolt.IRichBolt, IUpdatable {
private static final Logger LOG = Logger.getLogger(IRichBoltDelegate.class.getName());
private static final long serialVersionUID = 8350418148268852902L;
private IRichBolt delegate;
private TopologyContext topologyContextImpl;
private OutputCollectorImpl outputCollectorImpl;
public IRichBoltDelegate(IRichBolt delegate) {
this.delegate = delegate;
}
@Override
@SuppressWarnings("rawtypes")
public void prepare(
Map<String, Object> conf,
org.apache.heron.api.topology.TopologyContext context,
org.apache.heron.api.bolt.OutputCollector collector) {
topologyContextImpl = new TopologyContext(context);
outputCollectorImpl = new OutputCollectorImpl(collector);
delegate.prepare(conf, topologyContextImpl, outputCollectorImpl);
}
@Override
public void cleanup() {
delegate.cleanup();
}
@Override
public void execute(org.apache.heron.api.tuple.Tuple tuple) {
TupleImpl impl = new TupleImpl(tuple);
delegate.execute(impl);
}
@Override
public void declareOutputFields(org.apache.heron.api.topology.OutputFieldsDeclarer declarer) {
OutputFieldsGetter getter = new OutputFieldsGetter(declarer);
delegate.declareOutputFields(getter);
}
@Override
public Map<String, Object> getComponentConfiguration() {
Map<String, Object> config = delegate.getComponentConfiguration();
return ConfigUtils.translateComponentConfig(config);
}
@Override
public void update(org.apache.heron.api.topology.TopologyContext topologyContext) {
if (delegate instanceof IUpdatable) {
((IUpdatable) delegate).update(topologyContext);
} else {
LOG.warning(String.format("Update() event received but can not call update() on delegate "
+ "because it does not implement %s: %s", IUpdatable.class.getName(), delegate));
}
}
}