1 files changed, 111 insertions, 0 deletions
diff --git a/java/perftests/src/main/java/org/apache/qpid/disttest/results/aggregation/SeriesStatistics.java b/java/perftests/src/main/java/org/apache/qpid/disttest/results/aggregation/SeriesStatistics.java
new file mode 100644
index 0000000000..b93c210473
--- /dev/null
+++ b/java/perftests/src/main/java/org/apache/qpid/disttest/results/aggregation/SeriesStatistics.java
@@ -0,0 +1,111 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.qpid.disttest.results.aggregation;
+
+import java.util.Collection;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+public class SeriesStatistics
+{
+    private long _minValue;
+    private long _maxValue;
+    private double _mean;
+    private double _standardDeviation;
+    private Collection<Long> _series = new CopyOnWriteArrayList<Long>();
+
+    public SeriesStatistics()
+    {
+        super();
+    }
+
+    public SeriesStatistics(Collection<Long> messageLatencies)
+    {
+        setMessageLatencies(messageLatencies);
+    }
+
+    public void addMessageLatencies(Collection<Long> messageLatencies)
+    {
+        if (messageLatencies != null)
+        {
+            _series.addAll(messageLatencies);
+        }
+    }
+
+    public void setMessageLatencies(Collection<Long> messageLatencies)
+    {
+        _series = messageLatencies;
+        aggregate();
+    }
+
+    public void aggregate()
+    {
+        if (_series != null && _series.size() > 0)
+        {
+            long minLatency = Long.MAX_VALUE;
+            long maxLatency = Long.MIN_VALUE;
+            long totalLatency = 0;
+            for (Long latency : _series)
+            {
+                totalLatency += latency;
+                minLatency = Math.min(minLatency, latency);
+                maxLatency = Math.max(maxLatency, latency);
+            }
+            _mean = ((double) totalLatency) / (double) _series.size();
+            _minValue = minLatency;
+            _maxValue = maxLatency;
+            double sum = 0;
+            for (Long latency : _series)
+            {
+                double diff = latency - _mean;
+                sum += diff * diff;
+            }
+            long size = _series.size() == 1 ? 1: _series.size() - 1;
+            _standardDeviation = Math.sqrt(sum / (double) size);
+        }
+        else
+        {
+            _mean = 0;
+            _minValue = 0;
+            _maxValue = 0;
+            _standardDeviation = 0;
+        }
+    }
+
+    public long getMinimum()
+    {
+        return _minValue;
+    }
+
+    public long getMaximum()
+    {
+        return _maxValue;
+    }
+
+    public double getAverage()
+    {
+        return _mean;
+    }
+
+    public double getStandardDeviation()
+    {
+        return _standardDeviation;
+    }
+}