[GitHub] keith-turner opened a new issue #816: Create a metadata mutation builder

[GitBox <gi...@apache.org>]

keith-turner opened a new issue #816: Create a metadata mutation builder
URL: https://github.com/apache/accumulo/issues/816
 
 
   The function `addNewTablet()` at [MasterMetadataUtil line 67](https://github.com/apache/accumulo/blob/5484fa80022c52784d4000cdd422941fddec1441/server/base/src/main/java/org/apache/accumulo/server/util/MasterMetadataUtil.java#L67) contains a lot of code to construct a metadata table mutation.   It would be nice to replace this code with something like the following.
   
   ```java
   TabletMutation.Builder builder = TabletMutation.builder().for(extent)
     .directory(path)
     .time(time);
   
   if (lastFlushID > 0)
     builder.flushId(lastFlushID);
   
   if (lastCompactID > 0)
     builder.compactId(lastCompactID);
   
   builder.dataFiles(datafileSizes);
   builder.bulkLoads(bulkLoadedFiles);
   
   Mutation m = builder.build();
   ```
   
   Doing this would centralize the code for serializing tablet metadata for write.  It should be designed by using similar methods names to [TabletMetadata](https://github.com/apache/accumulo/blob/5484fa80022c52784d4000cdd422941fddec1441/core/src/main/java/org/apache/accumulo/core/metadata/schema/TabletMetadata.java) which is an abstraction for deserializing and using  tablet metadata.  Not sure, but it may be useful if the same builder could build a mutation or TabletMetadata object.  

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