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The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2012-2016 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://aws.amazon.com/apache2.0
 *
 * 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 com.amazonaws.auth;

import com.amazonaws.auth.profile.ProfileCredentialsProvider;

/**
 * AWS credentials provider chain that looks for credentials in this order:
 * 
 *   Environment Variables -
 *      AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY
 *      (RECOMMENDED since they are recognized by all the AWS SDKs and CLI except for .NET),
 *      or AWS_ACCESS_KEY and AWS_SECRET_KEY (only recognized by Java SDK)
 *   
 *   Java System Properties - aws.accessKeyId and aws.secretKey
 *   Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI
 *   Credentials delivered through the Amazon EC2 container service if AWS_CONTAINER_CREDENTIALS_RELATIVE_URI" environment variable is set
 *   and security manager has permission to access the variable,
 *   Instance profile credentials delivered through the Amazon EC2 metadata service
 * 
 *
 * @see EnvironmentVariableCredentialsProvider
 * @see SystemPropertiesCredentialsProvider
 * @see ProfileCredentialsProvider
 * @see EC2ContainerCredentialsProviderWrapper
 */
public class DefaultAWSCredentialsProviderChain extends AWSCredentialsProviderChain {
    public DefaultAWSCredentialsProviderChain() {
        super(new EnvironmentVariableCredentialsProvider(),
              new SystemPropertiesCredentialsProvider(),
              new ProfileCredentialsProvider(),
              new EC2ContainerCredentialsProviderWrapper());
    }
}