hadoop MsiTokenProvider 源码
haddop MsiTokenProvider 代码
文件路径：/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/oauth2/MsiTokenProvider.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.azurebfs.oauth2;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides tokens based on Azure VM's Managed Service Identity.
*/
public class MsiTokenProvider extends AccessTokenProvider {
private final String authEndpoint;
private final String authority;
private final String tenantGuid;
private final String clientId;
private long tokenFetchTime = -1;
private static final long ONE_HOUR = 3600 * 1000;
private static final Logger LOG = LoggerFactory.getLogger(AccessTokenProvider.class);
public MsiTokenProvider(final String authEndpoint, final String tenantGuid,
final String clientId, final String authority) {
this.authEndpoint = authEndpoint;
this.tenantGuid = tenantGuid;
this.clientId = clientId;
this.authority = authority;
}
@Override
protected AzureADToken refreshToken() throws IOException {
LOG.debug("AADToken: refreshing token from MSI");
AzureADToken token = AzureADAuthenticator
.getTokenFromMsi(authEndpoint, tenantGuid, clientId, authority, false);
tokenFetchTime = System.currentTimeMillis();
return token;
}
/**
* Checks if the token is about to expire as per base expiry logic.
* Otherwise try to expire every 1 hour
*
* @return true if the token is expiring in next 1 hour or if a token has
* never been fetched
*/
@Override
protected boolean isTokenAboutToExpire() {
if (tokenFetchTime == -1 || super.isTokenAboutToExpire()) {
return true;
}
boolean expiring = false;
long elapsedTimeSinceLastTokenRefreshInMillis =
System.currentTimeMillis() - tokenFetchTime;
expiring = elapsedTimeSinceLastTokenRefreshInMillis >= ONE_HOUR
|| elapsedTimeSinceLastTokenRefreshInMillis < 0;
// In case of, Token is not refreshed for 1 hr or any clock skew issues,
// refresh token.
if (expiring) {
LOG.debug("MSIToken: token renewing. Time elapsed since last token fetch:"
+ " {} milli seconds", elapsedTimeSinceLastTokenRefreshInMillis);
}
return expiring;
}
}
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