| /** |
| * 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.yarn.server.timelineservice.storage.application; |
| |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnFamily; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; |
| |
| /** |
| * Represents the application table column families. |
| */ |
| public enum ApplicationColumnFamily implements ColumnFamily<ApplicationTable> { |
| |
| /** |
| * Info column family houses known columns, specifically ones included in |
| * columnfamily filters. |
| */ |
| INFO("i"), |
| |
| /** |
| * Configurations are in a separate column family for two reasons: a) the size |
| * of the config values can be very large and b) we expect that config values |
| * are often separately accessed from other metrics and info columns. |
| */ |
| CONFIGS("c"), |
| |
| /** |
| * Metrics have a separate column family, because they have a separate TTL. |
| */ |
| METRICS("m"); |
| |
| /** |
| * Byte representation of this column family. |
| */ |
| private final byte[] bytes; |
| |
| /** |
| * @param value create a column family with this name. Must be lower case and |
| * without spaces. |
| */ |
| private ApplicationColumnFamily(String value) { |
| // column families should be lower case and not contain any spaces. |
| this.bytes = Bytes.toBytes(Separator.SPACE.encode(value)); |
| } |
| |
| public byte[] getBytes() { |
| return Bytes.copy(bytes); |
| } |
| |
| } |