/*
* Copyright The Apache Software Foundation
*
* 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.hadoop.hbase.client;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Specify Isolation levels in Scan operations.
* <p>
* There are two isolation levels. A READ_COMMITTED isolation level
* indicates that only data that is committed be returned in a scan.
* An isolation level of READ_UNCOMMITTED indicates that a scan
* should return data that is being modified by transactions that might
* not have been committed yet.
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public enum IsolationLevel {
READ_COMMITTED(1),
READ_UNCOMMITTED(2);
IsolationLevel(int value) {}
public byte [] toBytes() {
return new byte [] { toByte() };
}
public byte toByte() {
return (byte)this.ordinal();
}
public static IsolationLevel fromBytes(byte [] bytes) {
return IsolationLevel.fromByte(bytes[0]);
}
public static IsolationLevel fromByte(byte vbyte) {
return IsolationLevel.values()[vbyte];
}
}