mirror of https://github.com/apache/cloudstack.git
53 lines
1.8 KiB
Java
53 lines
1.8 KiB
Java
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package com.cloud.cluster;
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/**
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* TaskManager helps business logic deal with clustering failover.
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* Say you're writing code that introduces an inconsistent state over
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* of your operation? Who will come back to cleanup this state? TaskManager
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* with different content during your process. If the server dies, TaskManager
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* running elsewhere. If there are no clustered servers, then TaskManager will
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* cleanup when the dead server resumes.
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*
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*/
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public interface CheckPointManager {
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/**
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* responsible for cleaning up.
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*
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* @param context context information to be stored.
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* @return Check point id.
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*/
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long pushCheckPoint(CleanupMaid context);
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/**
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* update the task with new context
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* @param taskId
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* @param updatedContext new updated context.
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*/
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void updateCheckPointState(long taskId, CleanupMaid updatedContext);
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/**
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* removes the task as it is completed.
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*
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* @param taskId
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*/
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void popCheckPoint(long taskId);
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}
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