| /** |
| * 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.tools.rumen.state; |
| |
| import org.codehaus.jackson.annotate.JsonIgnore; |
| |
| /** |
| * Represents a state. This state is managed by {@link StatePool}. |
| * |
| * Note that a {@link State} objects should be persistable. Currently, the |
| * {@link State} objects are persisted using the Jackson JSON library. Hence the |
| * implementors of the {@link State} interface should be careful while defining |
| * their public setter and getter APIs. |
| */ |
| public interface State { |
| /** |
| * Returns true if the state is updated since creation (or reload). |
| */ |
| @JsonIgnore |
| boolean isUpdated(); |
| |
| /** |
| * Get the name of the state. |
| */ |
| public String getName(); |
| |
| /** |
| * Set the name of the state. |
| */ |
| public void setName(String name); |
| } |