com.qubole.rubix.spi.ClusterManager.java Source code

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Here is the source code for com.qubole.rubix.spi.ClusterManager.java

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/**
 * Copyright (c) 2016. Qubole Inc
 * 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. See accompanying LICENSE file.
 */
package com.qubole.rubix.spi;

import org.apache.hadoop.conf.Configuration;

import java.util.List;

/**
 * Created by stagra on 14/1/16.
 */

/*
 * This class should be implemented for each engine.
 * The implementation should return the nodes in a form which the scheduler of that engine can recognize and route the splits to
 */
public abstract class ClusterManager {
    private long splitSize = 64 * 1024 * 1024; // 64MB

    private int nodeRefreshTime = 10; //sec

    public static String splitSizeConf = "caching.fs.split-size";

    public static String nodeRefreshTimeConf = "caching.fs.node-refresh-time";

    public ClusterType getClusterType() {
        return null;
    }

    public void initialize(Configuration conf)

    {
        splitSize = conf.getLong(splitSizeConf, splitSize);
        nodeRefreshTime = conf.getInt(nodeRefreshTimeConf, nodeRefreshTime);
    }

    // This is the size in which the file will be logically divided into splits
    public long getSplitSize() {
        return splitSize;
    }

    public int getNodeRefreshTime() {
        return nodeRefreshTime;
    }

    public abstract boolean isMaster();

    // Nodes format as per the note above
    // Should return sorted list
    public abstract List<String> getNodes();
}