Kai Zheng created HADOOP-9926:
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Summary: Authentication specific login implementation in separate
class from UGI
Key: HADOOP-9926
URL: https://issues.apache.org/jira/browse/HADOOP-9926
Project: Hadoop Common
Issue Type: Improvement
Reporter: Kai Zheng
Assignee: Kai Zheng
As discussed in HADOOP-9797, we would improve UGI class in incremental patches.
This issue covers the following in the patch that will be attached for this
issue:
* HadoopLogin is an interface, and AbstractHadoopLogin is the abstract
implementation for it, to define the API and common implementation for various
login mechanisms, not just for JAAS based.
* Login implementation details, are removed from UGI and wrapped in concrete
HadoopLogin implementations like SimpleAuthnLogin, UserKerberosLogin and
KeytabKerberosLogin, which will be simply employed by appropriate UGI login
related methods to do the login work.
* The login result can be returned via getSubject() for now from the
HadoopLogin interface, and UGI can call it to get the result. The result is
then wrapped in a UGI object.
* For Kerberos part, we might cover it in another JIRA since the change is big.
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