/**
* Copyright 2014 Lockheed Martin Corporation
*
* Licensed 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 streamflow.engine.wrapper.trident;
import backtype.storm.task.TopologyContext;
import backtype.storm.tuple.Fields;
import java.util.HashMap;
import java.util.Map;
import streamflow.engine.framework.FrameworkException;
import streamflow.engine.hook.SpoutMetricsHook;
import streamflow.engine.wrapper.BaseWrapper;
import streamflow.model.Topology;
import streamflow.model.TopologyComponent;
import streamflow.model.config.StreamflowConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import storm.trident.operation.TridentCollector;
import storm.trident.spout.IBatchSpout;
public class BatchSpoutWrapper extends BaseWrapper<IBatchSpout> implements IBatchSpout {
protected static final Logger LOG = LoggerFactory.getLogger(BatchSpoutWrapper.class);
public BatchSpoutWrapper(Topology topology, TopologyComponent component,
boolean isCluster, StreamflowConfig configuration) throws FrameworkException {
super(topology, component, isCluster, configuration, IBatchSpout.class);
}
@Override
public void open(Map conf, TopologyContext context) {
try {
// Register the metrics hook for this bolt to track statistics
context.addTaskHook(new SpoutMetricsHook());
getDelegate().open(conf, context);
} catch (FrameworkException ex) {
LOG.error("open() not delegated due to a Framework exception: ", ex);
} catch (Exception ex) {
LOG.error("open() threw an uncaught exception: ", ex);
}
}
@Override
public void emitBatch(long batchId, TridentCollector collector) {
try {
getDelegate().emitBatch(batchId, collector);
} catch (FrameworkException ex) {
LOG.error("emitBatch() not delegated due to a Framework exception: ", ex);
} catch (Exception ex) {
LOG.error("emitBatch() threw an uncaught exception: ", ex);
}
}
@Override
public void ack(long batchId) {
try {
getDelegate().ack(batchId);
} catch (FrameworkException ex) {
LOG.error("ack() not delegated due to a Framework exception: ", ex);
} catch (Exception ex) {
LOG.error("ack() threw an uncaught exception: ", ex);
}
}
@Override
public Fields getOutputFields() {
try {
return getDelegate().getOutputFields();
} catch (FrameworkException ex) {
LOG.error("getOutputFields() not delegated due to a Framework exception: ", ex);
return null;
} catch (Exception ex) {
LOG.error("getOutputFields() threw an uncaught exception: ", ex);
return null;
}
}
@Override
public void close() {
try {
getDelegate().close();
} catch (FrameworkException ex) {
LOG.error("close() not delegated due to a Framework exception: ", ex);
}
}
@Override
public Map<String, Object> getComponentConfiguration() {
try {
return getDelegate().getComponentConfiguration();
} catch (FrameworkException ex) {
LOG.error("getComponentConfiguration() not delegated due to a Framework exception: ", ex);
return new HashMap();
}
}
}