com.sematext.hbase.hut.UpdateProcessor.java Source code

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Here is the source code for com.sematext.hbase.hut.UpdateProcessor.java

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/**
 * Copyright 2010 Sematext International
 *
 * Licensed 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 com.sematext.hbase.hut;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.io.Writable;

/**
 * Performs records processing.
 * Implementation SHOULD be stateless and thread-safe
 */
public abstract class UpdateProcessor implements Writable {
    public abstract void process(Iterable<Result> records, UpdateProcessingResult processingResult);

    /**
     * Allows to skip merging of records even if HBase core decided to merge them.
     * Adds extra flexibility to skip unnecessary merging of records.
     *
     * @param originalKey original key of the records about to be merged
     * @return true if merge needed, false otherwise
     */
    public boolean isMergeNeeded(byte[] originalKey) {
        return true;
    }

    @Override
    public void write(DataOutput dataOutput) throws IOException {
        // DO NOTHING BY DEFAULT
    }

    @Override
    public void readFields(DataInput dataInput) throws IOException {
        // DO NOTHING BY DEFAULT
    }
}