fix issue influxdata#517 : missing millis and nanos in MsgPack

Author: lxhoan

src/main/java/org/influxdb/msgpack/MessagePackTraverser.java

@@ -8,6 +8,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 import org.influxdb.InfluxDBException;
 import org.influxdb.dto.QueryResult;
@@ -27,6 +28,7 @@
  */
 public class MessagePackTraverser {
 
+  private static final byte MSG_PACK_TIME_EXT_TYPE = 5;
   private String lastStringNode;
 
   /**
@@ -229,14 +231,17 @@ void traverse(final MessageUnpacker unpacker, final QueryResultModelPath queryRe
         }
         break;
       case EXTENSION:
-        final byte msgPackTimeExtType = (byte) 5;
-        final int timeOffset = 0;
-        final int timeByteArrayLength = 8;
+        final int nanosStartIndex = 8;
         extension = unpacker.unpackExtensionTypeHeader();
-        if (extension.getType() == msgPackTimeExtType) {
+        if (extension.getType() == MSG_PACK_TIME_EXT_TYPE) {
+          //decode epoch nanos in accordance with https://github.com/tinylib/msgp/blob/master/msgp/write.go#L594
+
           dst = new byte[extension.getLength()];
           unpacker.readPayload(dst);
-          o = ByteBuffer.wrap(dst, timeOffset, timeByteArrayLength).getLong();
+          ByteBuffer bf = ByteBuffer.wrap(dst, 0, extension.getLength());
+          long epochSeconds = bf.getLong();
+          int nanosOffset = bf.getInt(nanosStartIndex);
+          o = TimeUnit.SECONDS.toNanos(epochSeconds) + nanosOffset;
         }
         break;
 

src/test/java/org/influxdb/MessagePackInfluxDBTest.java

@@ -5,6 +5,7 @@
 import static org.mockito.Mockito.spy;
 
 import java.io.IOException;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -91,9 +92,17 @@ public void testWriteBatchWithPrecision() throws Exception {
 
     // THEN the measure points have a timestamp with second precision
     QueryResult queryResult = this.influxDB.query(new Query("SELECT * FROM " + measurement, dbName));
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(0).get(0), t1);
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(1).get(0), t2);
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(2).get(0), t3);
+    long bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(0).get(0));
+    Assertions.assertEquals(bySecond, t1);
+    
+    bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(1).get(0));
+    Assertions.assertEquals(bySecond, t2);
+    
+    bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(2).get(0));
+    Assertions.assertEquals(bySecond, t3);
 
     this.influxDB.deleteDatabase(dbName);
   }
@@ -182,9 +191,19 @@ public void testWriteRecordsWithPrecision() throws Exception {
     // THEN the measure points have a timestamp with second precision
     QueryResult queryResult = this.influxDB.query(new Query("SELECT * FROM " + measurement, dbName));
     Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().size(), 3);
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(0).get(0), timeP1);
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(1).get(0), timeP2);
-    Assertions.assertEquals(queryResult.getResults().get(0).getSeries().get(0).getValues().get(2).get(0), timeP3);
+    
+    long bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(0).get(0));
+    Assertions.assertEquals(bySecond, timeP1);
+
+    bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(1).get(0));
+    Assertions.assertEquals(bySecond, timeP2);
+    
+    bySecond = TimeUnit.NANOSECONDS.toSeconds(
+        (Long) queryResult.getResults().get(0).getSeries().get(0).getValues().get(2).get(0));
+    Assertions.assertEquals(bySecond, timeP3);
+
     this.influxDB.deleteDatabase(dbName);
   }