org.apache.flink.runtime.operators.util.metrics.CountingMutableObjectIterator Maven / Gradle / Ivy
/*
* 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.flink.runtime.operators.util.metrics;
import org.apache.flink.metrics.Counter;
import org.apache.flink.util.MutableObjectIterator;
import java.io.IOException;
public class CountingMutableObjectIterator implements MutableObjectIterator {
private final MutableObjectIterator iterator;
private final Counter numRecordsIn;
public CountingMutableObjectIterator(MutableObjectIterator iterator, Counter numRecordsIn) {
this.iterator = iterator;
this.numRecordsIn = numRecordsIn;
}
@Override
public IN next(IN reuse) throws IOException {
IN next = iterator.next(reuse);
if (next != null) {
numRecordsIn.inc();
}
return next;
}
@Override
public IN next() throws IOException {
IN next = iterator.next();
if (next != null) {
numRecordsIn.inc();
}
return next;
}
}