/*
* 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.beam.sdk.io.hbase;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import org.apache.beam.sdk.coders.AtomicCoder;
import org.apache.beam.sdk.coders.Coder;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto.MutationType;
/**
* A {@link Coder} that serializes and deserializes the {@link Mutation} objects using {@link
* ProtobufUtil}.
*/
class HBaseMutationCoder extends AtomicCoder<Mutation> implements Serializable {
private static final HBaseMutationCoder INSTANCE = new HBaseMutationCoder();
private HBaseMutationCoder() {}
public static HBaseMutationCoder of() {
return INSTANCE;
}
@Override
public void encode(Mutation mutation, OutputStream outStream) throws IOException {
MutationType type = getType(mutation);
MutationProto proto = ProtobufUtil.toMutation(type, mutation);
proto.writeDelimitedTo(outStream);
}
@Override
public Mutation decode(InputStream inStream) throws IOException {
return ProtobufUtil.toMutation(MutationProto.parseDelimitedFrom(inStream));
}
private static MutationType getType(Mutation mutation) {
if (mutation instanceof Put) {
return MutationType.PUT;
} else if (mutation instanceof Delete) {
return MutationType.DELETE;
} else {
// Increment and Append are not idempotent. They should not be used in distributed jobs.
throw new IllegalArgumentException("Only Put and Delete are supported");
}
}
}