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CdpProfileCredentialsProvider.java
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CdpProfileCredentialsProvider.java
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/*
* Copyright (c) 2018 Cloudera, Inc. All Rights Reserved.
*
* Portions Copyright (c) Copyright 2013-2018 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.
* 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 com.cloudera.cdp.authentication.credentials;
import static com.cloudera.cdp.ValidationUtils.checkNotNullAndThrow;
import com.cloudera.cdp.authentication.credentials.profile.CdpProfileConfigFile;
import javax.annotation.Nullable;
import org.apache.commons.lang3.StringUtils;
/**
* Credentials provider based on CDP configuration profiles. This provider
* reads credentials from the profile configuration file for the default
* profile, or for a specific, named profile.
*/
public class CdpProfileCredentialsProvider
implements CdpCredentialsProvider {
/**
* Name of system environment variable holding the name of profile to use
* when reading the credentials file. Overrides CDP_DEFAULT_PROFILE_NAME.
*/
public static final String CDP_DEFAULT_PROFILE = "CDP_DEFAULT_PROFILE";
/**
* Name of the profile in the users credentials file to read.
*/
public static final String CDP_DEFAULT_PROFILE_NAME = "default";
private volatile CdpProfileConfigFile cdpProfileConfigFile;
private final String cdpProfileName;
/**
* Uses the default CDP location (~/.cdp/credentials) and default profile
* name. Loading of the credential file is deferred until getCredentials()
* method is called
*/
public CdpProfileCredentialsProvider() {
this(null);
}
/**
* Uses the default CDP location (~/.cdp/credentials) and input profile
* name, or the default if the input profile name is null. Loading of the
* credential file is deferred until getCredentials() method is called.
* @param profileName profile name to use, "default" is used if null
*/
public CdpProfileCredentialsProvider(
@Nullable String profileName) {
this((CdpProfileConfigFile) null, profileName);
}
/**
* Uses the input profile file path and input profile name, or the default
* if the input profile name is null. Loading of credential file is deferred
* until getCredentials() method is called.
* @param profileFilePath path to the credentials file
* @param profileName profile name to use, "default" is used if null
*/
public CdpProfileCredentialsProvider(
String profileFilePath,
@Nullable String profileName) {
this(new CdpProfileConfigFile(checkNotNullAndThrow(profileFilePath)),
profileName);
}
private CdpProfileCredentialsProvider(
@Nullable CdpProfileConfigFile profilesConfigFile,
@Nullable String profileName) {
this.cdpProfileConfigFile = profilesConfigFile;
if (StringUtils.isBlank(profileName)) {
this.cdpProfileName = getCdpProfileName();
} else {
this.cdpProfileName = profileName;
}
}
private String getCdpProfileName() {
String envProfileName = System.getenv(CDP_DEFAULT_PROFILE);
if (StringUtils.isBlank(envProfileName)) {
return CDP_DEFAULT_PROFILE_NAME;
} else {
return envProfileName;
}
}
@Override
public CdpCredentials getCredentials() {
if (cdpProfileConfigFile == null) {
synchronized (this) {
if (cdpProfileConfigFile == null) {
cdpProfileConfigFile = new CdpProfileConfigFile();
}
}
}
return cdpProfileConfigFile.getCredentials(this.cdpProfileName);
}
}