com.ksc.auth.ClasspathPropertiesFileCredentialsProvider Maven / Gradle / Ivy
/*
* Copyright 2015-2016 ksyun.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://ksyun.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.ksc.auth;
import java.io.IOException;
import java.io.InputStream;
import com.ksc.KscClientException;
/**
* {@link AWSCredentialsProvider} implementation that loads AWS security
* credentials from a properties file on the classpath. The default
* constructor creates a credentials provider that loads the credentials
* from a file named AwsCredentials.properties on the
* classpath, but which file to use from the classpath can also be controled
* through the one-argument constructor.
*
* The AWS access key ID is expected to be in the accessKey
* property and the AWS secret key is expected to be in the
* secretKey property.
*/
public class ClasspathPropertiesFileCredentialsProvider implements AWSCredentialsProvider {
/** The name of the properties file to check for credentials */
private static String DEFAULT_PROPERTIES_FILE = "AwsCredentials.properties";
private final String credentialsFilePath;
/**
* Creates a new ClasspathPropertiesFileCredentialsProvider that will
* attempt to load the AwsCredentials.properties file from
* the classpath to read AWS security credentials.
*/
public ClasspathPropertiesFileCredentialsProvider() {
this(DEFAULT_PROPERTIES_FILE);
}
/**
* Creates a new ClasspathPropertiesFileCredentialsProvider that will
* attempt to load a custom file from the classpath to read AWS security
* credentials.
*
* @param credentialsFilePath
* The custom classpath resource path to a properties file
* from which the AWS security credentials should be loaded.
*
* For example,
*
* - com/mycompany/credentials.properties
* - beta-credentials.properties
* - AwsCredentials.properties
*
*/
public ClasspathPropertiesFileCredentialsProvider(String credentialsFilePath) {
if (credentialsFilePath == null)
throw new IllegalArgumentException("Credentials file path cannot be null");
// Make sure the path is absolute
if (!credentialsFilePath.startsWith("/")) {
this.credentialsFilePath = "/" + credentialsFilePath;
} else {
this.credentialsFilePath = credentialsFilePath;
}
}
public AWSCredentials getCredentials() {
InputStream inputStream = getClass().getResourceAsStream(credentialsFilePath);
if (inputStream == null) {
throw new KscClientException("Unable to load AWS credentials from the " + credentialsFilePath + " file on the classpath");
}
try {
return new PropertiesCredentials(inputStream);
} catch (IOException e) {
throw new KscClientException("Unable to load AWS credentials from the " + credentialsFilePath + " file on the classpath", e);
}
}
public void refresh() {}
@Override
public String toString() {
return getClass().getSimpleName() + "(" + credentialsFilePath + ")";
}
}