1 /*
2 * Copyright 2010-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License").
5 * You may not use this file except in compliance with the License.
6 * A copy of the License is located at
7 *
8 * http://aws.amazon.com/apache2.0
9 *
10 * or in the "license" file accompanying this file. This file is distributed
11 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
12 * express or implied. See the License for the specific language governing
13 * permissions and limitations under the License.
14 */
15 package com.amazonaws.metrics;
16
17 /**
18 * A service provider interface that can be used to implement an AWS SDK
19 * general purpose metric collector.
20 */
21 public abstract class ServiceMetricCollector {
22 public static interface Factory {
23 /**
24 * Returns an instance of the collector; or null if if failed to create
25 * one.
26 */
27 public ServiceMetricCollector getServiceMetricCollector();
28 }
29 /**
30 * Collects metrics on the number of bytes written or read and the respective
31 * duration.
32 */
33 public abstract void collectByteThroughput(ByteThroughputProvider provider);
34 /**
35 * Collects metrics for non-request specific latencies.
36 */
37 public abstract void collectLatency(ServiceLatencyProvider provider);
38
39 public boolean isEnabled() { return true; }
40 /** A convenient instance of a no-op service metric collector. */
41 public static final ServiceMetricCollector NONE = new ServiceMetricCollector() {
42 @Override public void collectByteThroughput(ByteThroughputProvider provider) {}
43 @Override public void collectLatency(ServiceLatencyProvider provider) {}
44 @Override public boolean isEnabled() { return false; }
45 };
46 }
47