Java tutorial
/* * Copyright 2012-2015 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.er.sylvite; import com.amazonaws.AmazonClientException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.AWSCredentialsProvider; import com.amazonaws.auth.BasicAWSCredentials; import com.amazonaws.util.StringUtils; /** * {@link com.amazonaws.auth.AWSCredentialsProvider} implementation that provides credentials * by looking at the: <code>CUSTOM_AWS_ACCESS_KEY_ID</code> and <code>CUSTOM_AWS_SECRET_ACCESS_KEY</code>) * environment variables. * */ public class CustomEnvironmentVariableCredentialsProvider implements AWSCredentialsProvider { public static String ACCESS_KEY_ENV_VAR = "AWS_ACCESS_KEY_ID"; public static String SECRET_KEY_ENV_VAR = "AWS_SECRET_ACCESS_KEY"; public static String PREFIX_ENV_VAR = "CUSTOM_PREFIX"; public static String DEFAULT_PREFIX = "CUSTOM"; @Override public AWSCredentials getCredentials() { String prefix = System.getProperty(PREFIX_ENV_VAR, DEFAULT_PREFIX); String accessKeyEnvVar = prefix + "_" + ACCESS_KEY_ENV_VAR; String secretKeyEnvVar = prefix + "_" + SECRET_KEY_ENV_VAR; String accessKey = System.getenv(accessKeyEnvVar); String secretKey = System.getenv(secretKeyEnvVar); accessKey = StringUtils.trim(accessKey); secretKey = StringUtils.trim(secretKey); if (StringUtils.isNullOrEmpty(accessKey) || StringUtils.isNullOrEmpty(secretKey)) { throw new AmazonClientException("Unable to load AWS credentials from environment variables " + "(" + accessKeyEnvVar + " and " + secretKeyEnvVar + ")"); } return new BasicAWSCredentials(accessKey, secretKey); } @Override public void refresh() { } @Override public String toString() { return getClass().getSimpleName(); } }