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From phrocker <...@git.apache.org>
Subject [GitHub] accumulo pull request: ACCUMULO-4153: Update the getCodec method t...
Date Wed, 24 Feb 2016 21:09:10 GMT
Github user phrocker commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/73#discussion_r54006645
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/file/rfile/bcfile/Compression.java
---
    @@ -147,25 +148,27 @@ public synchronized OutputStream createCompressionStream(OutputStream
downStream
         },
     
         GZ(COMPRESSION_GZ) {
    -      private transient DefaultCodec codec;
    +      private transient AtomicReference<DefaultCodec> codec = new AtomicReference<DefaultCodec>();
     
           @Override
    -      synchronized CompressionCodec getCodec() {
    -        if (codec == null) {
    -          codec = new DefaultCodec();
    -          codec.setConf(conf);
    +      CompressionCodec getCodec() {
    +        DefaultCodec resultCodec = codec.get();
    +        if (null == resultCodec) {
    +          DefaultCodec newCodec = new DefaultCodec();
    +          newCodec.setConf(conf);
    +          codec.compareAndSet(null, newCodec);
             }
     
    -        return codec;
    +        return codec.get();
    --- End diff --
    
    whether or not resultCodec is null, I'm returning the reference as the code requires someone
to have set it based on the simple logic. Could get rid of resultCodec if there is heartburn
about not using it above. 


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