Java tutorial
/******************************************************************************* * 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.tcl.gateway.firehose.log4j.helper; 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()); } }