hadoop EnvironmentVariableCredentialsProvider 源码
haddop EnvironmentVariableCredentialsProvider 代码
文件路径：/hadoop-cloud-storage-project/hadoop-cos/src/main/java/org/apache/hadoop/fs/cosn/auth/EnvironmentVariableCredentialsProvider.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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 org.apache.hadoop.fs.cosn.auth;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.auth.COSCredentialsProvider;
import com.qcloud.cos.utils.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.cosn.Constants;
import javax.annotation.Nullable;
import java.net.URI;
/**
* The provider obtaining the cos credentials from the environment variables.
*/
public class EnvironmentVariableCredentialsProvider
extends AbstractCOSCredentialsProvider implements COSCredentialsProvider {
public EnvironmentVariableCredentialsProvider(@Nullable URI uri,
Configuration conf) {
super(uri, conf);
}
@Override
public COSCredentials getCredentials() {
String secretId = System.getenv(Constants.COSN_SECRET_ID_ENV);
String secretKey = System.getenv(Constants.COSN_SECRET_KEY_ENV);
secretId = StringUtils.trim(secretId);
secretKey = StringUtils.trim(secretKey);
if (!StringUtils.isNullOrEmpty(secretId)
&& !StringUtils.isNullOrEmpty(secretKey)) {
return new BasicCOSCredentials(secretId, secretKey);
}
return null;
}
@Override
public void refresh() {
}
@Override
public String toString() {
return String.format("EnvironmentVariableCredentialsProvider{%s, %s}",
Constants.COSN_SECRET_ID_ENV,
Constants.COSN_SECRET_KEY_ENV);
}
}
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