org.apache.phoenix.schema.stat.PTableStatsImpl.java Source code

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Here is the source code for org.apache.phoenix.schema.stat.PTableStatsImpl.java

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/*
 * 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.phoenix.schema.stat;

import java.util.Map;

import org.apache.hadoop.hbase.HRegionInfo;

import com.google.common.collect.ImmutableMap;

/**
 * Implementation for PTableStats.
 */
public class PTableStatsImpl implements PTableStats {

    // The map for guide posts should be immutable. We only take the current snapshot from outside
    // method call and store it.
    private Map<String, byte[][]> regionGuidePosts;

    public PTableStatsImpl() {
    }

    public PTableStatsImpl(Map<String, byte[][]> stats) {
        regionGuidePosts = ImmutableMap.copyOf(stats);
    }

    @Override
    public byte[][] getRegionGuidePosts(HRegionInfo region) {
        return regionGuidePosts.get(region.getRegionNameAsString());
    }

    @Override
    public Map<String, byte[][]> getGuidePosts() {
        if (regionGuidePosts != null) {
            return ImmutableMap.copyOf(regionGuidePosts);
        }

        return null;
    }
}