Merge pull request #21 from InscopeMetrics/intlong

Switch int->long in HistogramDataPointImpl

src/main/java/io/inscopemetrics/kairosdb/HistogramDataPointImpl.java

@@ -233,7 +233,7 @@ public long getOriginalCount() {
      */
     @Override
     public long getSampleCount() {
-        int count = 0;
+        long count = 0;
         for (Integer binSamples : map.values()) {
             count += binSamples;
         }

src/test/java/io/inscopemetrics/kairosdb/HistogramDatapointImplTest.java

@@ -0,0 +1,19 @@
+package io.inscopemetrics.kairosdb;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.TreeMap;
+
+public class HistogramDatapointImplTest {
+    @Test
+    public void testLargeSampleCount() {
+        final TreeMap<Double, Integer> map = new TreeMap<>();
+        map.put(1d, 2147483647);
+        map.put(2d, 2147483647);
+        map.put(3d, 2147483647);
+        map.put(4d, 2147483647);
+        final HistogramDataPointImpl dp = new HistogramDataPointImpl(1, map, -10, 10, 10, 10);
+        Assert.assertEquals(8589934588L, dp.getSampleCount());
+    }
+}