Tsz-wo Sze created HDDS-14846:
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             Summary: Implement ScmCodecFactory without reflection.
                 Key: HDDS-14846
                 URL: https://issues.apache.org/jira/browse/HDDS-14846
             Project: Apache Ozone
          Issue Type: Sub-task
          Components: SCM HA
            Reporter: Tsz-wo Sze
            Assignee: Chen-Jheng Sing


- The getCodec(Class) method  in ScmCodecFactory uses reflection to get all 
super classes/interfaces.
- It also forces the callers to use reflection in order get the class. 

We should change the method to take a String and then use the 
ClassResolver to resolve the Class.

BTW, we should also change ScmCodecFactory to singleton, i.e. change 
the codecs map to non-static and add a static field (similar to Java 
[Runtime|https://github.com/openjdk/jdk8u/blob/cb212803aa1132023e18935cbebec818fecb607f/jdk/src/share/classes/java/lang/Runtime.java#L47]).



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