anujmodi2021 commented on code in PR #6552:
URL: https://github.com/apache/hadoop/pull/6552#discussion_r1495257474
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java:
##########
@@ -941,31 +941,57 @@ public AccessTokenProvider getTokenProvider() throws
TokenAccessProviderExceptio
}
}
+ /**
+ * The following method chooses between a configured fixed sas token, and a
user implementation of the SASTokenProvider interface,
+ * depending on which one is available. In case a user SASTokenProvider
implementation is not present, and a fixed token is configured,
+ * it simply returns null, to set the sasTokenProvider object for current
configuration instance to null.
+ * The fixed token is read and used later. This is done to:
+ * 1. check for cases where both are not set, while initializing
AbfsConfiguration,
Review Comment:
Taken
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java:
##########
@@ -941,31 +941,57 @@ public AccessTokenProvider getTokenProvider() throws
TokenAccessProviderExceptio
}
}
+ /**
+ * The following method chooses between a configured fixed sas token, and a
user implementation of the SASTokenProvider interface,
+ * depending on which one is available. In case a user SASTokenProvider
implementation is not present, and a fixed token is configured,
+ * it simply returns null, to set the sasTokenProvider object for current
configuration instance to null.
+ * The fixed token is read and used later. This is done to:
+ * 1. check for cases where both are not set, while initializing
AbfsConfiguration,
+ * to not proceed further than thi stage itself when none of the options are
available.
+ * 2. avoid using similar tokenProvider implementation to just read the
configured fixed token,
+ * as this could create confusion. The configuration is introduced
+ * primarily to avoid using any tokenProvider class/interface.
Also,implementing the SASTokenProvider requires relying on the raw
configurations.
+ * It is more stable to depend on the AbfsConfiguration with which a
filesystem is initialized,
+ * and eliminate chances of dynamic modifications and spurious situations.
+ * @return sasTokenProvider object
+ * @throws AzureBlobFileSystemException
+ */
public SASTokenProvider getSASTokenProvider() throws
AzureBlobFileSystemException {
AuthType authType = getEnum(FS_AZURE_ACCOUNT_AUTH_TYPE_PROPERTY_NAME,
AuthType.SharedKey);
if (authType != AuthType.SAS) {
- throw new SASTokenProviderException(String.format(
- "Invalid auth type: %s is being used, expecting SAS", authType));
+ throw new SASTokenProviderException(String.format("Invalid auth type: %s
is being used, expecting SAS", authType));
}
try {
- String configKey = FS_AZURE_SAS_TOKEN_PROVIDER_TYPE;
- Class<? extends SASTokenProvider> sasTokenProviderClass =
- getTokenProviderClass(authType, configKey, null,
+ Class<? extends SASTokenProvider> sasTokenProviderImplementation =
+ getTokenProviderClass(authType, FS_AZURE_SAS_TOKEN_PROVIDER_TYPE,
+ null,
SASTokenProvider.class);
-
- Preconditions.checkArgument(sasTokenProviderClass != null,
- String.format("The configuration value for \"%s\" is invalid.",
configKey));
-
- SASTokenProvider sasTokenProvider = ReflectionUtils
- .newInstance(sasTokenProviderClass, rawConfig);
- Preconditions.checkArgument(sasTokenProvider != null,
- String.format("Failed to initialize %s", sasTokenProviderClass));
-
- LOG.trace("Initializing {}", sasTokenProviderClass.getName());
- sasTokenProvider.initialize(rawConfig, accountName);
- LOG.trace("{} init complete", sasTokenProviderClass.getName());
- return sasTokenProvider;
+ String configuredFixedToken =
this.rawConfig.get(FS_AZURE_SAS_FIXED_TOKEN,
+ null);
+
+ Preconditions.checkArgument(!(sasTokenProviderImplementation == null
+ && configuredFixedToken == null),
+ String.format(
+ "The value for both \"%s\" and \"%s\" cannot be invalid.",
Review Comment:
Taken
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