org.apache.hadoop.hdfs.protocol.ErasureCodingPolicyState Maven / Gradle / Ivy
/**
* 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.hdfs.protocol;
import org.apache.hadoop.classification.InterfaceAudience;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
/**
* Value denotes the possible states of an ErasureCodingPolicy.
*/
@InterfaceAudience.Private
public enum ErasureCodingPolicyState {
/** Policy is disabled. It's policy default state. */
DISABLED(1),
/** Policy is enabled. It can be applied to directory and file. */
ENABLED(2),
/**
* Policy is removed from the system. Due to there are potential files
* use this policy, it cannot be deleted from system immediately. A removed
* policy can be re-enabled later.*/
REMOVED(3);
private static final ErasureCodingPolicyState[] CACHED_VALUES =
ErasureCodingPolicyState.values();
private final int value;
ErasureCodingPolicyState(int v) {
value = v;
}
public int getValue() {
return value;
}
public static ErasureCodingPolicyState fromValue(int v) {
if (v > 0 && v <= CACHED_VALUES.length) {
return CACHED_VALUES[v - 1];
}
return null;
}
/** Read from in. */
public static ErasureCodingPolicyState read(DataInput in) throws IOException {
return fromValue(in.readByte());
}
/** Write to out. */
public void write(DataOutput out) throws IOException {
out.writeByte(ordinal());
}
}