| /* |
| * 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.ignite.compute; |
| |
| import org.apache.ignite.IgniteException; |
| |
| /** |
| * Annotation for handling master node leave during job execution. |
| * <p> |
| * If {@link ComputeJob} concrete class implements this interface then in case when master node leaves topology |
| * during job execution the callback method {@link #onMasterNodeLeft(ComputeTaskSession)} will be executed. |
| * <p> |
| * Implementing this interface gives you ability to preserve job execution result or its intermediate state |
| * which could be reused later. E.g. you can save job execution result to the database or as a checkpoint |
| * and reuse it when failed task is being executed again thus avoiding job execution from scratch. |
| */ |
| public interface ComputeJobMasterLeaveAware { |
| /** |
| * A method which is executed in case master node has left topology during job execution. |
| * |
| * @param ses Task session, can be used for checkpoint saving. |
| * @throws IgniteException In case of any exception. |
| */ |
| public void onMasterNodeLeft(ComputeTaskSession ses) throws IgniteException; |
| } |