001    /**
002    * Licensed to the Apache Software Foundation (ASF) under one
003    * or more contributor license agreements.  See the NOTICE file
004    * distributed with this work for additional information
005    * regarding copyright ownership.  The ASF licenses this file
006    * to you under the Apache License, Version 2.0 (the
007    * "License"); you may not use this file except in compliance
008    * with the License.  You may obtain a copy of the License at
009    *
010    *     http://www.apache.org/licenses/LICENSE-2.0
011    *
012    * Unless required by applicable law or agreed to in writing, software
013    * distributed under the License is distributed on an "AS IS" BASIS,
014    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015    * See the License for the specific language governing permissions and
016    * limitations under the License.
017    */
018    
019    package org.apache.hadoop.yarn.state;
020    
021    import org.apache.hadoop.classification.InterfaceAudience.Public;
022    import org.apache.hadoop.classification.InterfaceStability.Evolving;
023    import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
024    
025    @Public
026    @Evolving
027    public class InvalidStateTransitonException extends YarnRuntimeException {
028    
029      private static final long serialVersionUID = 8610511635996283691L;
030    
031      private Enum<?> currentState;
032      private Enum<?> event;
033    
034      public InvalidStateTransitonException(Enum<?> currentState, Enum<?> event) {
035        super("Invalid event: " + event + " at " + currentState);
036        this.currentState = currentState;
037        this.event = event;
038      }
039    
040      public Enum<?> getCurrentState() {
041        return currentState;
042      }
043      
044      public Enum<?> getEvent() {
045        return event;
046      }
047    
048    }