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From: poornachandra <git@git.apache.org>
To: dev@tephra.incubator.apache.org
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References: <git-pr-32-incubator-tephra@git.apache.org>
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Subject: [GitHub] incubator-tephra pull request #32: (TEPHRA-215) (TEPHRA-218) Use single thre...
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Message-Id: <20170207174349.D5F92E03BB@git1-us-west.apache.org>
Date: Tue,  7 Feb 2017 17:43:49 +0000 (UTC)
archived-at: Tue, 07 Feb 2017 17:43:57 -0000

Github user poornachandra commented on a diff in the pull request:

    https://github.com/apache/incubator-tephra/pull/32#discussion_r99879750
  
    --- Diff: tephra-hbase-compat-1.1-base/src/main/java/org/apache/tephra/hbase/txprune/PruneUpperBoundWriter.java ---
    @@ -18,55 +18,48 @@
     
     package org.apache.tephra.hbase.txprune;
     
    +import com.google.common.util.concurrent.AbstractIdleService;
     import org.apache.commons.logging.Log;
     import org.apache.commons.logging.LogFactory;
    -import org.apache.hadoop.hbase.TableName;
    -import org.apache.tephra.hbase.coprocessor.TransactionProcessor;
     
     import java.io.IOException;
    +import java.util.Iterator;
    +import java.util.Objects;
    +import java.util.Queue;
    +import java.util.concurrent.ConcurrentLinkedQueue;
     import java.util.concurrent.TimeUnit;
    -import java.util.concurrent.atomic.AtomicBoolean;
    -import java.util.concurrent.atomic.AtomicLong;
     
     /**
      * Thread that will write the the prune upper bound
      */
    -public class PruneUpperBoundWriter {
    -  private static final Log LOG = LogFactory.getLog(TransactionProcessor.class);
    +public class PruneUpperBoundWriter extends AbstractIdleService {
    +  private static final Log LOG = LogFactory.getLog(PruneUpperBoundWriter.class);
     
    -  private final TableName pruneStateTable;
       private final DataJanitorState dataJanitorState;
    -  private final byte[] regionName;
    -  private final String regionNameAsString;
       private final long pruneFlushInterval;
    -  private final AtomicLong pruneUpperBound;
    -  private final AtomicBoolean shouldFlush;
    +  private final Queue<PruneInfo> pruneEntries;
     
       private Thread flushThread;
       private long lastChecked;
     
    -  public PruneUpperBoundWriter(DataJanitorState dataJanitorState, TableName pruneStateTable, String regionNameAsString,
    -                               byte[] regionName, long pruneFlushInterval) {
    -    this.pruneStateTable = pruneStateTable;
    +  public PruneUpperBoundWriter(DataJanitorState dataJanitorState, long pruneFlushInterval) {
         this.dataJanitorState = dataJanitorState;
    -    this.regionName = regionName;
    -    this.regionNameAsString = regionNameAsString;
         this.pruneFlushInterval = pruneFlushInterval;
    -    this.pruneUpperBound = new AtomicLong();
    -    this.shouldFlush = new AtomicBoolean(false);
    +    this.pruneEntries = new ConcurrentLinkedQueue<>();
         startFlushThread();
    --- End diff --
    
    Since the flush thread is started in the `startUp` method, we don't need to start it in the constructor.


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