org.apache.tinkerpop.gremlin.driver.RequestMetricsCollector Maven / Gradle / Ivy

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A Java Gremlin client for Amazon Neptune that allows you to change the endpoints used by the client as it is running.

There is a newer version: 2.1.0

/*
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License").
You may not use this file except in compliance with the License.
A copy of the License is located at
    http://www.apache.org/licenses/LICENSE-2.0
or in the "license" file accompanying this file. This file 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.tinkerpop.gremlin.driver;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.UUID;

class RequestMetricsCollector {

    private static final int MAX_NUMBER_TRACE_IDS = 9000;

    public final Map metrics;
    public final Map traceIds = new LinkedHashMap<>(16, 0.75f, true);

    private int dropped = 0;

    private int skipped = 0;

    public RequestMetricsCollector(Map metrics) {
        this.metrics = metrics;
    }

    public void registerAddressForTraceId(UUID traceId, String address) {
        if (traceIds.size() > MAX_NUMBER_TRACE_IDS){
            UUID toRemove = traceIds.keySet().iterator().next();
            traceIds.remove(toRemove);
            dropped++;
        }
        traceIds.put(traceId, address);
    }

    public void registerDurationForTraceId(UUID traceId, long durationMillis, Throwable e) {
        String address = traceIds.remove(traceId);
        if (address != null) {
            if (metrics.containsKey(address)) {
                metrics.get(address).update(durationMillis, e);
            } else {
                skipped++;
            }
        } else {
            skipped++;
        }
    }

    public int droppedRequests(){
        return dropped;
    }

    public int skippedResponses(){
        return skipped;
    }
    public long totalRequests(){
        long totalRequests = 0;
        for (EndpointRequestMetrics rm : metrics.values()) {
            totalRequests += (rm.getSuccessCount() + rm.getErrorCount());
        }
        return totalRequests;
    }

    public long failedRequests(){
        long failedRequests = 0;
        for (EndpointRequestMetrics rm : metrics.values()) {
            failedRequests += rm.getErrorCount();
        }
        return failedRequests;
    }

    public Collection metrics(){
        return metrics.values();
    }

}