/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.pact.runtime.task.chaining;
import eu.stratosphere.api.common.functions.Function;
import eu.stratosphere.api.common.functions.GenericFlatMap;
import eu.stratosphere.configuration.Configuration;
import eu.stratosphere.nephele.template.AbstractInvokable;
import eu.stratosphere.pact.runtime.task.RegularPactTask;
public class ChainedFlatMapDriver<IT, OT> extends ChainedDriver<IT, OT> {
private GenericFlatMap<IT, OT> mapper;
// --------------------------------------------------------------------------------------------
@Override
public void setup(AbstractInvokable parent) {
@SuppressWarnings("unchecked")
final GenericFlatMap<IT, OT> mapper =
RegularPactTask.instantiateUserCode(this.config, userCodeClassLoader, GenericFlatMap.class);
this.mapper = mapper;
mapper.setRuntimeContext(getUdfRuntimeContext());
}
@Override
public void openTask() throws Exception {
Configuration stubConfig = this.config.getStubParameters();
RegularPactTask.openUserCode(this.mapper, stubConfig);
}
@Override
public void closeTask() throws Exception {
RegularPactTask.closeUserCode(this.mapper);
}
@Override
public void cancelTask() {
try {
this.mapper.close();
} catch (Throwable t) {
}
}
// --------------------------------------------------------------------------------------------
public Function getStub() {
return this.mapper;
}
public String getTaskName() {
return this.taskName;
}
// --------------------------------------------------------------------------------------------
@Override
public void collect(IT record) {
try {
this.mapper.flatMap(record, this.outputCollector);
} catch (Exception ex) {
throw new ExceptionInChainedStubException(this.taskName, ex);
}
}
@Override
public void close() {
this.outputCollector.close();
}
}