org.apache.hadoop.hive.ql.exec.tez.tools.TezMergedLogicalInput Maven / Gradle / Ivy
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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.hadoop.hive.ql.exec.tez.tools;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;
import org.apache.tez.runtime.api.Input;
import org.apache.tez.runtime.api.MergedInputContext;
import org.apache.tez.runtime.api.MergedLogicalInput;
import org.apache.tez.runtime.api.Reader;
/**
* TezMergedLogicalInput is an adapter to make union input look like
* a single input in tez.
*/
public class TezMergedLogicalInput extends MergedLogicalInput {
private Map readyInputs = new IdentityHashMap();
public TezMergedLogicalInput(MergedInputContext context, List inputs) {
super(context, inputs);
}
@Override
public Reader getReader() throws Exception {
return new KeyValuesInputMerger(getInputs());
}
@Override
public void setConstituentInputIsReady(Input input) {
synchronized (this) {
readyInputs.put(input, Boolean.TRUE);
}
if (readyInputs.size() == getInputs().size()) {
informInputReady();
}
}
}