[asterixdb] 03/06: [NO ISSUE][HYR] Use System.nanotime for StopWatch

[dl...@apache.org]

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dlych pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/asterixdb.git

commit d8229a82a492eac70034444344c1521cee8cf3bc
Author: Michael Blow <mi...@couchbase.com>
AuthorDate: Fri Apr 12 09:44:06 2019 -0400

    [NO ISSUE][HYR] Use System.nanotime for StopWatch
    
    Change-Id: Ic64f1b938c26161f5fb482af5ee1da6121f49643
    Reviewed-on: https://asterix-gerrit.ics.uci.edu/3339
    Sonar-Qube: Jenkins <je...@fulliautomatix.ics.uci.edu>
    Tested-by: Jenkins <je...@fulliautomatix.ics.uci.edu>
    Integration-Tests: Jenkins <je...@fulliautomatix.ics.uci.edu>
    Reviewed-by: Ian Maxon <im...@uci.edu>
---
 .../java/org/apache/hyracks/api/util/StopWatch.java   | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/StopWatch.java b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/StopWatch.java
index e752cb3..a1a39cb 100644
--- a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/StopWatch.java
+++ b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/util/StopWatch.java
@@ -19,32 +19,27 @@
 
 package org.apache.hyracks.api.util;
 
+import java.util.concurrent.TimeUnit;
+
 public class StopWatch {
     private long startTime = 0;
-    private long stopTime = 0;
     private long elapsedTime = 0;
 
     public void start() {
         elapsedTime = 0;
-        startTime = System.currentTimeMillis();
+        startTime = System.nanoTime();
     }
 
     public void stop() {
-        stopTime = System.currentTimeMillis();
-        elapsedTime += stopTime - startTime;
+        elapsedTime += System.nanoTime() - startTime;
     }
 
     public void resume() {
-        startTime = System.currentTimeMillis();
+        startTime = System.nanoTime();
     }
 
-    //elaspsed time in milliseconds
-    public long getElapsedTime() {
-        return elapsedTime;
+    public long elapsed(TimeUnit unit) {
+        return unit.convert(elapsedTime, TimeUnit.NANOSECONDS);
     }
 
-    //elaspsed time in seconds
-    public long getElapsedTimeSecs() {
-        return elapsedTime / 1000;
-    }
 }
\ No newline at end of file