[PECOBLR-131][PECOBLR-180] Add token cache for U2M OAuth by using sdk

[vikrantpuppala]

Description

Depends on databricks/databricks-sdk-java#429

This PR implements token caching for OAuth U2M by integrating support for both a no-operation token cache and an encrypted file token cache, and updates connection context parsing and URL parameters accordingly. Key changes include:

• Adding new tests for token cache configuration and encryption.
• Introducing new helper methods and enum parameters for token cache management in ClientConfigurator and DatabricksJdbcUrlParams.
• Implementing two token cache variants (NoOp and EncryptedFile) with corresponding file permission and encryption logic.

Testing

Manual + unit tests across jdbc and sdk

Additional Notes to the Reviewer

[Copilot]

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

src/main/java/com/databricks/jdbc/common/DatabricksJdbcUrlParams.java:121

• [nitpick] Consider using a naming convention consistent with existing parameters (e.g., lowerCamelCase as in "socketTimeout") for consistency in URL parameter keys.

TOKEN_CACHE_PASS_PHRASE("TokenCachePassPhrase", "Pass phrase to use for OAuth U2M Token Cache")

[Copilot]

Pull Request Overview

This PR implements token caching for OAuth U2M by integrating support for both a no-operation token cache and an encrypted file token cache, and updates connection context parsing and URL parameters accordingly. Key changes include:

• Adding new tests for token cache configuration and encryption.
• Introducing new helper methods and enum parameters for token cache management in ClientConfigurator and DatabricksJdbcUrlParams.
• Implementing two token cache variants (NoOp and EncryptedFile) with corresponding file permission and encryption logic.

Reviewed Changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/test/java/com/databricks/jdbc/dbclient/impl/common/ClientConfiguratorTest.java	Added tests validating U2M configuration with/without token cache.
src/test/java/com/databricks/jdbc/auth/NoOpTokenCacheTest.java	Introduced tests for the NoOpTokenCache behavior.
src/test/java/com/databricks/jdbc/auth/EncryptedFileTokenCacheTest.java	Added tests for encrypted file token cache including error cases and permission checks.
src/test/java/com/databricks/jdbc/api/impl/DatabricksConnectionContextTest.java	Extended tests to verify token cache settings via JDBC URL and properties.
src/main/java/com/databricks/jdbc/dbclient/impl/common/ClientConfigurator.java	Added token cache path generation and token cache initialization logic.
src/main/java/com/databricks/jdbc/common/DatabricksJdbcUrlParams.java	Added new URL parameters for token cache configuration.
src/main/java/com/databricks/jdbc/auth/NoOpTokenCache.java	Implemented a no-operation token cache for disabled caching.
src/main/java/com/databricks/jdbc/auth/EncryptedFileTokenCache.java	Implemented encrypted file based token cache with encryption and decryption logic.
src/main/java/com/databricks/jdbc/api/internal/IDatabricksConnectionContext.java and src/main/java/com/databricks/jdbc/api/impl/DatabricksConnectionContext.java	Extended connection context interface and implementation with token cache settings.

Files not reviewed (1)

• pom.xml: Language not supported

[Copilot]

Pull Request Overview

This PR adds support for token caching in the OAuth U2M flow by introducing new configuration parameters and implementing both an encrypted file cache and a no-operation cache fallback. Key changes include updates to the client configurator to integrate token caching, new tests covering both encrypted and no-op caching implementations, and corresponding adjustments in the JDBC URL parameters and connection context.

Reviewed Changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/test/java/com/databricks/jdbc/dbclient/impl/common/ClientConfiguratorTest.java	Updates tests to verify token cache functionality; however, expected scopes in assertions remain in legacy array syntax.
src/test/java/com/databricks/jdbc/auth/NoOpTokenCacheTest.java	Added tests to validate no-operation token cache behavior.
src/test/java/com/databricks/jdbc/auth/EncryptedFileTokenCacheTest.java	Added tests for encrypted token cache persistence and error handling.
src/test/java/com/databricks/jdbc/api/impl/DatabricksConnectionContextTest.java	Extended tests to cover new token cache configuration parameters.
src/main/java/com/databricks/jdbc/dbclient/impl/common/ClientConfigurator.java	Integrated token cache support into the client setup logic.
src/main/java/com/databricks/jdbc/common/DatabricksJdbcUrlParams.java	Introduced new URL parameters for token caching.
src/main/java/com/databricks/jdbc/auth/NoOpTokenCache.java	New no-op cache implementation for disabled token caching.
src/main/java/com/databricks/jdbc/auth/EncryptedFileTokenCache.java	Implemented encrypted token cache with file IO and encryption.
src/main/java/com/databricks/jdbc/api/internal/IDatabricksConnectionContext.java	Extended interface to include token cache methods.
src/main/java/com/databricks/jdbc/api/impl/DatabricksConnectionContext.java	Updated connection context to support token cache configuration.
NEXT_CHANGELOG.md	Documented new token caching feature in the changelog.

Files not reviewed (1)

• pom.xml: Language not supported