content: /*******************************************************************************
   * Copyright 2014 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.services.kinesis.log4j.helpers;
  
  import com.amazonaws.auth.AWSCredentialsProviderChain;
  import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
  import com.amazonaws.auth.EnvironmentVariableCredentialsProvider;
  import com.amazonaws.auth.InstanceProfileCredentialsProvider;
  import com.amazonaws.auth.SystemPropertiesCredentialsProvider;
  
  /**
   * 
   * Custom credentials provider chain to look for AWS credentials. Implementation
   * will look for credentials in the following priority:
   * <ul>
   * <li>AwsCredentials.properties file in classpath (must contain accessKey and
   * secretKey keys)</li>
   * <li>Instance profile credentials delivered through the Amazon EC2 metadata
   * <li>Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_KEY</li>
   * <li>Java System Properties - aws.accessKeyId and aws.secretKey</li>
   * service</li>
   * <ul>
   * 
   */
  public final class CustomCredentialsProviderChain extends AWSCredentialsProviderChain {
    public CustomCredentialsProviderChain() {
      super(new ClasspathPropertiesFileCredentialsProvider(), new InstanceProfileCredentialsProvider(),
          new SystemPropertiesCredentialsProvider(), new EnvironmentVariableCredentialsProvider());
    }
  }
  