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.monitoring;
16
17 import com.amazonaws.profile.path.AwsProfileFileLocationProvider;
18
19 /**
20 * The default chain of {@link CsmConfigurationProvider}s.
21 * <p />
22 * This chain attempts to load the client side monitoring configuration by
23 * delegating to the following providers in order, and returning the first
24 * result:
25 * <ul>
26 * <li>{@link EnvironmentVariableCsmConfigurationProvider}</li>
27 * <li>{@link SystemPropertyCsmConfigurationProvider}</li>
28 * <li>{@link ProfileCsmConfigurationProvider}, using {@link
29 * AwsProfileFileLocationProvider#DEFAULT_CONFIG_LOCATION_PROVIDER} to
30 * locate the configuration file</li>
31 * </ul>
32 */
33 public final class DefaultCsmConfigurationProviderChain extends CsmConfigurationProviderChain {
34 private static final DefaultCsmConfigurationProviderChain INSTANCE =
35 new DefaultCsmConfigurationProviderChain();
36
37 private DefaultCsmConfigurationProviderChain() {
38 super(new EnvironmentVariableCsmConfigurationProvider(),
39 new SystemPropertyCsmConfigurationProvider(),
40 new ProfileCsmConfigurationProvider());
41 }
42
43 public static DefaultCsmConfigurationProviderChain getInstance() {
44 return INSTANCE;
45 }
46 }
47