org.apache.hudi.common.model.BaseAvroPayload Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hudi.common.model;
import org.apache.hudi.avro.HoodieAvroUtils;
import org.apache.hudi.exception.HoodieException;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericRecord;
import java.io.Serializable;
import java.util.Properties;
/**
* Base class for all AVRO record based payloads, that can be ordered based on a field.
*/
public abstract class BaseAvroPayload implements Serializable {
/**
* Avro data extracted from the source converted to bytes.
*/
protected final byte[] recordBytes;
/**
* For purposes of preCombining.
*/
protected final Comparable orderingVal;
protected final boolean isDeletedRecord;
/**
* Instantiate {@link BaseAvroPayload}.
*
* @param record Generic record for the payload.
* @param orderingVal {@link Comparable} to be used in pre combine.
*/
public BaseAvroPayload(GenericRecord record, Comparable orderingVal) {
this.recordBytes = record != null ? HoodieAvroUtils.avroToBytes(record) : new byte[0];
this.orderingVal = orderingVal;
this.isDeletedRecord = record == null || isDeleteRecord(record);
if (orderingVal == null) {
throw new HoodieException("Ordering value is null for record: " + record);
}
}
public Comparable getOrderingVal() {
return orderingVal;
}
/**
* Defines whether this implementation of {@link HoodieRecordPayload} is deleted.
* We will not do deserialization in this method.
*/
public boolean isDeleted(Schema schema, Properties props) {
return isDeletedRecord;
}
/**
* Defines whether this implementation of {@link HoodieRecordPayload} could produce
* {@link HoodieRecord#SENTINEL}
*/
public boolean canProduceSentinel() {
return false;
}
/**
* @param genericRecord instance of {@link GenericRecord} of interest.
* @returns {@code true} if record represents a delete record. {@code false} otherwise.
*/
protected boolean isDeleteRecord(GenericRecord genericRecord) {
final String isDeleteKey = HoodieRecord.HOODIE_IS_DELETED_FIELD;
// Modify to be compatible with new version Avro.
// The new version Avro throws for GenericRecord.get if the field name
// does not exist in the schema.
if (genericRecord.getSchema().getField(isDeleteKey) == null) {
return false;
}
Object deleteMarker = genericRecord.get(isDeleteKey);
return (deleteMarker instanceof Boolean && (boolean) deleteMarker);
}
}