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

Go to download

Show more of this group Show more artifacts with this name
Show all versions of gremlin-client Show documentation

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.concurrent.ConcurrentHashMap;
import java.util.function.BiFunction;
import java.util.stream.Collectors;

public class EndpointRequestMetrics {
    private final long start = System.currentTimeMillis();

    private final String address;
    private long totalDurationMillis;
    private long minMillis = 0L;
    private long maxMillis = 0L;
    private long successCount;
    private long errorCount;
    private final ConcurrentHashMap, ErrorMetric> errors = new ConcurrentHashMap<>();

    public EndpointRequestMetrics(String address) {
        this.address = address;
    }

    public void update(long duration, Throwable e) {
        totalDurationMillis += duration;
        if (duration > maxMillis) {
            maxMillis = duration;
        }
        if (duration < minMillis) {
            minMillis = duration;
        }
        if (e == null) {
            successCount++;
        } else {
            errors.compute(e.getClass(), new BiFunction, ErrorMetric, ErrorMetric>() {
                @Override
                public ErrorMetric apply(Class aClass, ErrorMetric errorMetric) {
                    if (errorMetric == null){
                        return new ErrorMetric(aClass).increment();
                    } else {
                        return errorMetric.increment();
                    }
                }
            });
            errorCount++;
        }
    }

    public String getAddress() {
        return address;
    }

    public long getSuccessCount() {
        return successCount;
    }

    public long getErrorCount() {
        return errorCount;
    }

    public double getRatePerSecond() {

        long duration = System.currentTimeMillis() - start;
        return (double) successCount / ((double) (duration) / 1000.00);

    }

    public double getAverageLatencyMillis() {
        return (double) totalDurationMillis / (double) successCount;
    }

    public long getMinLatencyMillis() {
        return minMillis;
    }

    public long getMaxLatencyMillis() {
        return maxMillis;
    }

    public Collection getErrors(){
        return errors.values();
    }

    @Override
    public String toString() {

        String errorString = getErrors().isEmpty() ?
                "" :
                String.format(", errors: [%s]", getErrors().stream().map(ErrorMetric::toString).collect(Collectors.joining(", ")));

        return String.format("%s [succeeded: %s, failed: %s, ratePerSec: %.3f, minMillis: %s, maxMillis: %s, avgMillis: %.2f%s]",
                getAddress(),
                getSuccessCount(),
                getErrorCount(),
                getRatePerSecond(),
                getMinLatencyMillis(),
                getMaxLatencyMillis(),
                getAverageLatencyMillis(),
                errorString
        );
    }
}