| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.federation.store.records; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * <p> |
| * State of a <code>SubCluster</code>. |
| * </p> |
| */ |
| @Private |
| @Unstable |
| public enum SubClusterState { |
| /** Newly registered subcluster, before the first heartbeat. */ |
| SC_NEW, |
| |
| /** Subcluster is registered and the RM sent a heartbeat recently. */ |
| SC_RUNNING, |
| |
| /** Subcluster is unhealthy. */ |
| SC_UNHEALTHY, |
| |
| /** Subcluster is in the process of being out of service. */ |
| SC_DECOMMISSIONING, |
| |
| /** Subcluster is out of service. */ |
| SC_DECOMMISSIONED, |
| |
| /** RM has not sent a heartbeat for some configured time threshold. */ |
| SC_LOST, |
| |
| /** Subcluster has unregistered. */ |
| SC_UNREGISTERED; |
| |
| public boolean isUnusable() { |
| return (this != SC_RUNNING && this != SC_NEW); |
| } |
| |
| public boolean isActive() { |
| return this == SC_RUNNING; |
| } |
| |
| public boolean isFinal() { |
| return (this == SC_UNREGISTERED || this == SC_DECOMMISSIONED |
| || this == SC_LOST); |
| } |
| |
| public static final Logger LOG = |
| LoggerFactory.getLogger(SubClusterState.class); |
| |
| /** |
| * Convert a string into {@code SubClusterState}. |
| * |
| * @param x the string to convert in SubClusterState |
| * @return the respective {@code SubClusterState} |
| */ |
| public static SubClusterState fromString(String x) { |
| try { |
| return SubClusterState.valueOf(x); |
| } catch (Exception e) { |
| LOG.error("Invalid SubCluster State value in the StateStore does not" |
| + " match with the YARN Federation standard."); |
| return null; |
| } |
| } |
| } |