org.apache.hudi.common.util.queue.IteratorBasedQueueProducer 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.hudi.common.util.queue;
import org.apache.hudi.common.util.ClosableIterator;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import java.util.Iterator;
/**
* Iterator based producer which pulls entry from iterator and produces items for the queue.
*
* @param Item type produced for the buffer.
*/
public class IteratorBasedQueueProducer implements HoodieProducer {
private static final Logger LOG = LogManager.getLogger(IteratorBasedQueueProducer.class);
private final Iterator inputIterator;
public IteratorBasedQueueProducer(Iterator inputIterator) {
this.inputIterator = inputIterator;
}
@Override
public void produce(HoodieMessageQueue queue) throws Exception {
LOG.info("starting to buffer records");
while (inputIterator.hasNext()) {
queue.insertRecord(inputIterator.next());
}
LOG.info("finished buffering records");
}
@Override
public void close() {
if (inputIterator instanceof ClosableIterator) {
((ClosableIterator) inputIterator).close();
}
}
}