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MergeOnReadLazyInsertIterable.java
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MergeOnReadLazyInsertIterable.java
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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.hudi.execution;
import org.apache.hudi.client.SparkTaskContextSupplier;
import org.apache.hudi.client.WriteStatus;
import org.apache.hudi.common.model.HoodieRecord;
import org.apache.hudi.common.model.HoodieRecordPayload;
import org.apache.hudi.config.HoodieWriteConfig;
import org.apache.hudi.io.HoodieAppendHandle;
import org.apache.hudi.table.HoodieTable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Lazy Iterable, that writes a stream of HoodieRecords sorted by the partitionPath, into new log files.
*/
public class MergeOnReadLazyInsertIterable<T extends HoodieRecordPayload> extends CopyOnWriteLazyInsertIterable<T> {
public MergeOnReadLazyInsertIterable(Iterator<HoodieRecord<T>> sortedRecordItr, HoodieWriteConfig config,
String instantTime, HoodieTable<T> hoodieTable, String idPfx, SparkTaskContextSupplier sparkTaskContextSupplier) {
super(sortedRecordItr, config, instantTime, hoodieTable, idPfx, sparkTaskContextSupplier);
}
@Override
protected CopyOnWriteInsertHandler getInsertHandler() {
return new MergeOnReadInsertHandler();
}
protected class MergeOnReadInsertHandler extends CopyOnWriteInsertHandler {
@Override
protected void consumeOneRecord(HoodieInsertValueGenResult<HoodieRecord> payload) {
final HoodieRecord insertPayload = payload.record;
List<WriteStatus> statuses = new ArrayList<>();
// lazily initialize the handle, for the first time
if (handle == null) {
handle = new HoodieAppendHandle(hoodieConfig, instantTime, hoodieTable,
insertPayload.getPartitionPath(), getNextFileId(idPrefix), sparkTaskContextSupplier);
}
if (handle.canWrite(insertPayload)) {
// write the payload, if the handle has capacity
handle.write(insertPayload, payload.insertValue, payload.exception);
} else {
// handle is full.
handle.close();
statuses.add(handle.getWriteStatus());
// Need to handle the rejected payload & open new handle
handle = new HoodieAppendHandle(hoodieConfig, instantTime, hoodieTable,
insertPayload.getPartitionPath(), getNextFileId(idPrefix), sparkTaskContextSupplier);
handle.write(insertPayload, payload.insertValue, payload.exception); // we should be able to write 1 payload.
}
}
}
}