evelyn97 opened a new pull request #1417:
URL: https://github.com/apache/hive/pull/1417
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### What changes were proposed in this pull request?
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This change adds an optional pluggable HttpRequestInterceptor for
HiveConnection. It allows client to pass in the name of a customize
HttpRequestInterceptor, instantiate the class and adds it to the HttpClient.
### Why are the changes needed?
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Example usage:
We would like to pass in a HttpRequestInterceptor for OAuth2.0
Authentication purpose. If we pass the Authorization header and access token
through http.header in the JDBC connection URL, we can not refresh the token
once the connection is established. Instead, we would like to pass the name of
the HttpRequestInterceptor, which will acquire and/or refresh the access token
and add it as authentication header each time HiveConnection sends the
HttpRequest.
### Does this PR introduce _any_ user-facing change?
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The HiveServer2 JDBC Connection URL will accept an additional session
variable "http.interceptor" that allows client to pass in the class name.
Example: http.interceptor=com.example.UserInterceptor
### How was this patch tested?
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Tests were not added because the HiveConnection class does not have a test
to begin with. The changes in code does not affect HiveConnection behavior.
It was tested by our custom JDBC Driver which uses the
hive-jdbc-4.0.0-SNAPSHOT-standalone.jar.
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