/**
* 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.tez.runtime.library.input;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience.LimitedPrivate;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.util.Progress;
import org.apache.tez.runtime.library.common.sort.impl.TezRawKeyValueIterator;
@LimitedPrivate("mapreduce")
public class ShuffledMergedInputLegacy extends ShuffledMergedInput {
private final Progress progress = new Progress();
@Private
public TezRawKeyValueIterator getIterator() throws IOException, InterruptedException {
// wait for input so that iterator is available
if (this.numInputs == 0) {
return new TezRawKeyValueIterator() {
@Override
public DataInputBuffer getKey() throws IOException {
throw new RuntimeException("No data available in Input");
}
@Override
public DataInputBuffer getValue() throws IOException {
throw new RuntimeException("No data available in Input");
}
@Override
public boolean next() throws IOException {
return false;
}
@Override
public void close() throws IOException {
}
@Override
public Progress getProgress() {
progress.complete();
return progress;
}
};
}
waitForInputReady();
return rawIter;
}
}