hadoop SharedInstanceCredentialProvider 源码
haddop SharedInstanceCredentialProvider 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/SharedInstanceCredentialProvider.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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.s3a;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider;
import org.apache.hadoop.fs.s3a.auth.NoAwsCredentialsException;
/**
* This credential provider has jittered between existing and non-existing,
* but it turns up in documentation enough that it has been restored.
* It extends {@link IAMInstanceCredentialsProvider} to pick up its
* bindings, which are currently to use the
* {@code EC2ContainerCredentialsProviderWrapper} class for IAM and container
* authentication.
* <p>
* When it fails to authenticate, it raises a
* {@link NoAwsCredentialsException} which can be recognized by retry handlers
* as a non-recoverable failure.
* <p>
* It is implicitly public; marked evolving as we can change its semantics.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
@SuppressWarnings("deprecation")
public final class SharedInstanceCredentialProvider extends IAMInstanceCredentialsProvider {
}
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