All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.apache.hadoop.hbase.regionserver.InternalScan Maven / Gradle / Ivy

There is a newer version: 3.0.0-beta-1
Show newest version
/**
 *
 * 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.hbase.regionserver;

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Scan;

/**
 * Special scanner, currently used for increment operations to
 * allow additional server-side arguments for Scan operations.
 * 

* Rather than adding new options/parameters to the public Scan API, this new * class has been created. *

* Supports adding an option to only read from the MemStore with * {@link #checkOnlyMemStore()} or to only read from StoreFiles with * {@link #checkOnlyStoreFiles()}. */ @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC) public class InternalScan extends Scan { private boolean memOnly = false; private boolean filesOnly = false; /** * @param get get to model scan after */ public InternalScan(Get get) { super(get); } /** * @param scan - original scan object * @throws IOException */ public InternalScan(Scan scan) throws IOException { super(scan); } /** * StoreFiles will not be scanned. Only MemStore will be scanned. */ public void checkOnlyMemStore() { memOnly = true; filesOnly = false; } /** * MemStore will not be scanned. Only StoreFiles will be scanned. */ public void checkOnlyStoreFiles() { memOnly = false; filesOnly = true; } /** * Returns true if only the MemStore should be checked. False if not. * @return true to only check MemStore */ public boolean isCheckOnlyMemStore() { return (memOnly); } /** * Returns true if only StoreFiles should be checked. False if not. * @return true if only check StoreFiles */ public boolean isCheckOnlyStoreFiles() { return (filesOnly); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy