org.apache.flink.runtime.state.gemini.engine.GRegion Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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*/
package org.apache.flink.runtime.state.gemini.engine;
import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.state.gemini.engine.dbms.Executor;
import org.apache.flink.runtime.state.gemini.engine.memstore.WriteBuffer;
import org.apache.flink.runtime.state.gemini.engine.page.PageStore;
/**
* Gemini region manages a batch of key-values.
*
* Currently, we map each key group as each region.
*/
@Internal
public interface GRegion extends Executor {
/**
* Returns the GRegion context of this region.
*
* @return The GRegion context of this region.
*/
GRegionContext getGRegionContext();
/**
* Returns the region id.
*
* @return The region id.
*/
GRegionID getRegionId();
/**
* Returns the write buffer which actually holds the data.
*
* @return The write buffer which actually holds the data.
*/
WriteBuffer getWriteBuffer();
/**
* Returns the page store within this region.
*
* @return The page store within this region.
*/
PageStore getPageStore();
}