org.elasticsearch.index.translog.TranslogStreams Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.elasticsearch.index.translog;
import org.elasticsearch.common.io.stream.BytesStreamInput;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import java.io.IOException;
/**
*
*/
public class TranslogStreams {
public static Translog.Operation readTranslogOperation(StreamInput in) throws IOException {
Translog.Operation.Type type = Translog.Operation.Type.fromId(in.readByte());
Translog.Operation operation;
switch (type) {
case CREATE:
operation = new Translog.Create();
break;
case DELETE:
operation = new Translog.Delete();
break;
case DELETE_BY_QUERY:
operation = new Translog.DeleteByQuery();
break;
case SAVE:
operation = new Translog.Index();
break;
default:
throw new IOException("No type for [" + type + "]");
}
operation.readFrom(in);
return operation;
}
public static Translog.Source readSource(byte[] data) throws IOException {
BytesStreamInput in = new BytesStreamInput(data, false);
in.readInt(); // the size header
Translog.Operation.Type type = Translog.Operation.Type.fromId(in.readByte());
Translog.Operation operation;
switch (type) {
case CREATE:
operation = new Translog.Create();
break;
case DELETE:
operation = new Translog.Delete();
break;
case DELETE_BY_QUERY:
operation = new Translog.DeleteByQuery();
break;
case SAVE:
operation = new Translog.Index();
break;
default:
throw new IOException("No type for [" + type + "]");
}
return operation.readSource(in);
}
public static void writeTranslogOperation(StreamOutput out, Translog.Operation op) throws IOException {
out.writeByte(op.opType().id());
op.writeTo(out);
}
}