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A Java-based performance testing tool for RabbitMQ.

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// Copyright (c) 2023 Broadcom. All Rights Reserved.
// The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
//
// This software, the RabbitMQ Java client library, is triple-licensed under the
// Mozilla Public License 2.0 ("MPL"), the GNU General Public License version 2
// ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see
// LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2.  For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// [email protected].
package com.rabbitmq.perf.metrics;

import java.time.Duration;

/**
 * Contract to collect metrics during a run.
 *
 * @since 2.19.0
 */
public interface PerformanceMetrics {

  PerformanceMetrics NO_OP =
      new PerformanceMetrics() {
        @Override
        public void start() {}

        @Override
        public void published() {}

        @Override
        public void confirmed(int count, long[] latencies) {}

        @Override
        public void nacked(int count) {}

        @Override
        public void returned() {}

        @Override
        public void received(long latency) {}

        @Override
        public Duration interval() {
          return Duration.ZERO;
        }

        @Override
        public void resetGlobals() {}
      };

  void start();

  void published();

  void confirmed(int count, long[] latencies);

  void nacked(int count);

  void returned();

  void received(long latency);

  Duration interval();

  void resetGlobals();
}