Java Map Merge mergeAggCompStatsTopoPageSpout(Map<String, Object> accSpoutStats, Map<String, Object> spoutStats)

Description

merge accumulated bolt stats with new bolt stats

License

Apache License

Declaration

public static Map<String, Object> mergeAggCompStatsTopoPageSpout(Map<String, Object> accSpoutStats,
        Map<String, Object> spoutStats)

Method Source Code

//package com.java2s;
/*//from   ww w .j a v a  2  s . c o  m
 * 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.
 */

import java.util.HashMap;

import java.util.Map;

public class Main {
    private static final String NUM_TASKS = "num-tasks";
    private static final String NUM_EXECUTORS = "num-executors";
    private static final String ACKED = "acked";
    private static final String FAILED = "failed";
    private static final String EMITTED = "emitted";
    private static final String TRANSFERRED = "transferred";
    private static final String COMP_LAT_TOTAL = "completeLatencyTotal";

    /**
     * merge accumulated bolt stats with new bolt stats
     */
    public static Map<String, Object> mergeAggCompStatsTopoPageSpout(Map<String, Object> accSpoutStats,
            Map<String, Object> spoutStats) {
        Map<String, Object> ret = new HashMap<>();

        Integer numExecutors = getByKeyOr0(accSpoutStats, NUM_EXECUTORS).intValue();
        putKV(ret, NUM_EXECUTORS, numExecutors + 1);
        putKV(ret, NUM_TASKS, sumOr0(getByKeyOr0(accSpoutStats, NUM_TASKS), getByKeyOr0(spoutStats, NUM_TASKS)));
        putKV(ret, EMITTED, sumOr0(getByKeyOr0(accSpoutStats, EMITTED), getByKeyOr0(spoutStats, EMITTED)));
        putKV(ret, TRANSFERRED,
                sumOr0(getByKeyOr0(accSpoutStats, TRANSFERRED), getByKeyOr0(spoutStats, TRANSFERRED)));
        putKV(ret, COMP_LAT_TOTAL,
                sumOr0(getByKeyOr0(accSpoutStats, COMP_LAT_TOTAL), getByKeyOr0(spoutStats, COMP_LAT_TOTAL)));
        putKV(ret, ACKED, sumOr0(getByKeyOr0(accSpoutStats, ACKED), getByKeyOr0(spoutStats, ACKED)));
        putKV(ret, FAILED, sumOr0(getByKeyOr0(accSpoutStats, FAILED), getByKeyOr0(spoutStats, FAILED)));

        return ret;
    }

    private static Number getByKeyOr0(Map m, String k) {
        if (m == null) {
            return 0;
        }

        Number n = (Number) m.get(k);
        if (n == null) {
            return 0;
        }
        return n;
    }

    public static void putKV(Map map, String k, Object v) {
        map.put(k, v);
    }

    private static Number sumOr0(Object a, Object b) {
        if (isValidNumber(a) && isValidNumber(b)) {
            if (a instanceof Long || a instanceof Integer) {
                return ((Number) a).longValue() + ((Number) b).longValue();
            } else {
                return ((Number) a).doubleValue() + ((Number) b).doubleValue();
            }
        }
        return 0;
    }

    /**
     * Returns true if x is a number that is not NaN or Infinity, false otherwise
     */
    private static boolean isValidNumber(Object x) {
        return x != null && x instanceof Number && !Double.isNaN(((Number) x).doubleValue())
                && !Double.isInfinite(((Number) x).doubleValue());
    }
}

Java Map Merge mergeAggCompStatsTopoPageSpout(Map accSpoutStats, Map spoutStats)

Description

License

Declaration

Method Source Code

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