http://git-wip-us.apache.org/repos/asf/incubator-gearpump-site/blob/f2a69d38/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/Stream.html
----------------------------------------------------------------------
diff --git 
a/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/Stream.html
 
b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/Stream.html
index a800ecd..a3e4d16 100644
--- 
a/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/Stream.html
+++ 
b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/Stream.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_121) on Tue Apr 25 03:06:36 SST 2017 -->
+<!-- Generated by javadoc (1.8.0_121) on Sun Jul 09 07:41:23 CEST 2017 -->
 <title>Stream</title>
-<meta name="date" content="2017-04-25">
+<meta name="date" content="2017-07-09">
 <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" 
title="Style">
 <script type="text/javascript" src="../../../../../../script.js"></script>
 </head>
@@ -18,7 +18,7 @@
     catch(err) {
     }
 //-->
-var methods = 
{"i0":9,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":9,"i7":10,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10,"i13":10,"i14":10,"i15":9,"i16":9,"i17":10};
+var methods = 
{"i0":9,"i1":9,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":9,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10,"i13":10,"i14":10,"i15":10,"i16":9,"i17":9,"i18":10};
 var tabs = {65535:["t0","All Methods"],1:["t1","Static 
Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]};
 var altColor = "altColor";
 var rowColor = "rowColor";
@@ -147,9 +147,10 @@ extends java.lang.Object</pre>
 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
-<td class="colOne"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#Stream-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-scala.Option-">Stream</a></span>(<a
 href="../../../../../../org/apache/gearpump/util/Graph.html" title="class in 
org.apache.gearpump.util">Graph</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
+<td class="colOne"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#Stream-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-scala.Option-org.apache.gearpump.streaming.dsl.window.api.Windows-">Stream</a></span>(<a
 href="../../../../../../org/apache/gearpump/util/Graph.html" title="class in 
org.apache.gearpump.util">Graph</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
       <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;thisNode,
-      scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge)</code>&nbsp;</td>
+      scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge,
+      <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/window/api/Windows.html"
 title="class in 
org.apache.gearpump.streaming.dsl.window.api">Windows</a>&nbsp;windows)</code>&nbsp;</td>
 </tr>
 </table>
 </li>
@@ -167,26 +168,33 @@ extends java.lang.Object</pre>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
+<td class="colFirst"><code>static <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#addWindowOp-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-org.apache.gearpump.streaming.dsl.window.api.Windows-">addWindowOp</a></span>(<a
 href="../../../../../../org/apache/gearpump/util/Graph.html" title="class in 
org.apache.gearpump.util">Graph</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
+           <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;op,
+           <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/window/api/Windows.html"
 title="class in 
org.apache.gearpump.streaming.dsl.window.api">Windows</a>&nbsp;win)</code>&nbsp;</td>
+</tr>
+<tr id="i1" class="rowColor">
 <td class="colFirst"><code>static &lt;T&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;T&gt;</code></td>
-<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#apply-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-scala.Option-">apply</a></span>(<a
 href="../../../../../../org/apache/gearpump/util/Graph.html" title="class in 
org.apache.gearpump.util">Graph</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
+<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#apply-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-scala.Option-org.apache.gearpump.streaming.dsl.window.api.Windows-">apply</a></span>(<a
 href="../../../../../../org/apache/gearpump/util/Graph.html" title="class in 
org.apache.gearpump.util">Graph</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
      <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;node,
-     scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge)</code>&nbsp;</td>
+     scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge,
+     <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/window/api/Windows.html"
 title="class in 
org.apache.gearpump.streaming.dsl.window.api">Windows</a>&nbsp;windows)</code>&nbsp;</td>
 </tr>
-<tr id="i1" class="rowColor">
+<tr id="i2" class="altColor">
 <td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#filter-org.apache.gearpump.streaming.dsl.api.functions.FilterFunction-java.lang.String-">filter</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/api/functions/FilterFunction.html"
 title="class in 
org.apache.gearpump.streaming.dsl.api.functions">FilterFunction</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;fn,
       java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new Stream keeping the elements that satisfy the 
filter function.</div>
 </td>
 </tr>
-<tr id="i2" class="altColor">
+<tr id="i3" class="rowColor">
 <td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#filter-scala.Function1-java.lang.String-">filter</a></span>(scala.Function1&lt;<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,java.lang.Object&gt;&nbsp;fn,
       java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new Stream keeping the elements that satisfy the 
filter function.</div>
 </td>
 </tr>
-<tr id="i3" class="rowColor">
+<tr id="i4" class="altColor">
 <td class="colFirst"><code>&lt;R&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;R&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#flatMap-org.apache.gearpump.streaming.dsl.scalaapi.functions.FlatMapFunction-java.lang.String-">flatMap</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/functions/FlatMapFunction.html"
 title="class in 
org.apache.gearpump.streaming.dsl.scalaapi.functions">FlatMapFunction</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,R&gt;&nbsp;fn,
        java.lang.String&nbsp;description)</code>
@@ -194,7 +202,7 @@ extends java.lang.Object</pre>
  and flatten the results.</div>
 </td>
 </tr>
-<tr id="i4" class="altColor">
+<tr id="i5" class="rowColor">
 <td class="colFirst"><code>&lt;R&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;R&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#flatMap-scala.Function1-java.lang.String-">flatMap</a></span>(scala.Function1&lt;<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in 
Stream">T</a>,scala.collection.TraversableOnce&lt;R&gt;&gt;&nbsp;fn,
        java.lang.String&nbsp;description)</code>
@@ -202,18 +210,18 @@ extends java.lang.Object</pre>
  and flatten the results.</div>
 </td>
 </tr>
-<tr id="i5" class="rowColor">
+<tr id="i6" class="altColor">
 <td class="colFirst"><code>&lt;A&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;A&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#fold-org.apache.gearpump.streaming.dsl.api.functions.FoldFunction-java.lang.String-">fold</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/api/functions/FoldFunction.html"
 title="class in 
org.apache.gearpump.streaming.dsl.api.functions">FoldFunction</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,A&gt;&nbsp;fn,
     java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new stream by applying a fold function over all 
the elements</div>
 </td>
 </tr>
-<tr id="i6" class="altColor">
+<tr id="i7" class="rowColor">
 <td class="colFirst"><code>static &lt;K,V&gt;&nbsp;K</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#getTupleKey-scala.Tuple2-">getTupleKey</a></span>(scala.Tuple2&lt;K,V&gt;&nbsp;tuple)</code>&nbsp;</td>
 </tr>
-<tr id="i7" class="rowColor">
+<tr id="i8" class="altColor">
 <td class="colFirst"><code>&lt;GROUP&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#groupBy-scala.Function1-int-java.lang.String-">groupBy</a></span>(scala.Function1&lt;<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,GROUP&gt;&nbsp;fn,
        int&nbsp;parallelism,
@@ -221,34 +229,35 @@ extends java.lang.Object</pre>
 <div class="block">Group by function (T =&gt; Group)</div>
 </td>
 </tr>
-<tr id="i8" class="altColor">
+<tr id="i9" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#log--">log</a></span>()</code>
 <div class="block">Log to task log file</div>
 </td>
 </tr>
-<tr id="i9" class="rowColor">
+<tr id="i10" class="altColor">
 <td class="colFirst"><code>&lt;R&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;R&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#map-scala.Function1-java.lang.String-">map</a></span>(scala.Function1&lt;<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,R&gt;&nbsp;fn,
    java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new stream by applying a map function to each 
element.</div>
 </td>
 </tr>
-<tr id="i10" class="altColor">
+<tr id="i11" class="rowColor">
 <td class="colFirst"><code>&lt;R&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;R&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#map-org.apache.gearpump.streaming.dsl.api.functions.MapFunction-java.lang.String-">map</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/api/functions/MapFunction.html"
 title="class in 
org.apache.gearpump.streaming.dsl.api.functions">MapFunction</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,R&gt;&nbsp;fn,
    java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new stream by applying a map function to each 
element.</div>
 </td>
 </tr>
-<tr id="i11" class="rowColor">
+<tr id="i12" class="altColor">
 <td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
-<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#merge-org.apache.gearpump.streaming.dsl.scalaapi.Stream-java.lang.String-">merge</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;other,
+<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#merge-org.apache.gearpump.streaming.dsl.scalaapi.Stream-int-java.lang.String-">merge</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;other,
+     int&nbsp;parallelism,
      java.lang.String&nbsp;description)</code>
 <div class="block">Merges data from two stream into one</div>
 </td>
 </tr>
-<tr id="i12" class="altColor">
+<tr id="i13" class="rowColor">
 <td class="colFirst"><code>&lt;R&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;R&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#process-java.lang.Class-int-org.apache.gearpump.cluster.UserConfig-java.lang.String-">process</a></span>(java.lang.Class&lt;?
 extends <a 
href="../../../../../../org/apache/gearpump/streaming/task/Task.html" 
title="class in org.apache.gearpump.streaming.task">Task</a>&gt;&nbsp;processor,
        int&nbsp;parallelism,
@@ -257,32 +266,31 @@ extends java.lang.Object</pre>
 <div class="block">Connects with a low level Processor(TaskDescription)</div>
 </td>
 </tr>
-<tr id="i13" class="rowColor">
+<tr id="i14" class="altColor">
 <td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#reduce-scala.Function2-java.lang.String-">reduce</a></span>(scala.Function2&lt;<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;fn,
       java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new stream by applying a reduce function over all 
the elements.</div>
 </td>
 </tr>
-<tr id="i14" class="altColor">
+<tr id="i15" class="rowColor">
 <td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#reduce-org.apache.gearpump.streaming.dsl.api.functions.ReduceFunction-java.lang.String-">reduce</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/api/functions/ReduceFunction.html"
 title="class in 
org.apache.gearpump.streaming.dsl.api.functions">ReduceFunction</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;fn,
       java.lang.String&nbsp;description)</code>
 <div class="block">Returns a new stream by applying a reduce function over all 
the elements.</div>
 </td>
 </tr>
-<tr id="i15" class="rowColor">
+<tr id="i16" class="altColor">
 <td class="colFirst"><code>static &lt;K,V&gt;&nbsp;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/KVStream.html"
 title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">KVStream</a>&lt;K,V&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#streamToKVStream-org.apache.gearpump.streaming.dsl.scalaapi.Stream-">streamToKVStream</a></span>(<a
 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;scala.Tuple2&lt;K,V&gt;&gt;&nbsp;stream)</code>&nbsp;</td>
 </tr>
-<tr id="i16" class="altColor">
+<tr id="i17" class="rowColor">
 <td class="colFirst"><code>static 
&lt;K,V&gt;&nbsp;scala.Function2&lt;scala.Tuple2&lt;K,V&gt;,scala.Tuple2&lt;K,V&gt;,scala.Tuple2&lt;K,V&gt;&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html#sumByKey-scala.math.Numeric-">sumByKey</a></span>(scala.math.Numeric&lt;V&gt;&nbsp;numeric)</code>&nbsp;</td>
 </tr>
-<tr id="i17" class="rowColor">
-<td class="colFirst"><code><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/WindowStream.html"
 title="class in 
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title="type parameter in Stream">T</a>&gt;&nbsp;win,
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title="type parameter in Stream">T</a>&gt;</code></td>
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href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;thisNode,
-              scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge)</pre>
+              scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge,
+              <a 
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title="class in 
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title="interface in 
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                                   <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;node,
-                                  scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge)</pre>
+                                  scala.Option&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;edge,
+                                  <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/window/api/Windows.html"
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org.apache.gearpump.streaming.dsl.window.api">Windows</a>&nbsp;windows)</pre>
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@@ -356,6 +366,17 @@ extends java.lang.Object</pre>
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 </li>
 </ul>
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name="addWindowOp-org.apache.gearpump.util.Graph-org.apache.gearpump.streaming.dsl.plan.Op-org.apache.gearpump.streaming.dsl.window.api.Windows-">
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href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
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org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;addWindowOp(<a 
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title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>,<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/OpEdge.html" 
title="interface in 
org.apache.gearpump.streaming.dsl.plan">OpEdge</a>&gt;&nbsp;graph,
+                             <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/plan/Op.html" 
title="interface in org.apache.gearpump.streaming.dsl.plan">Op</a>&nbsp;op,
+                             <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/window/api/Windows.html"
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org.apache.gearpump.streaming.dsl.window.api">Windows</a>&nbsp;win)</pre>
+</li>
+</ul>
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title="type parameter in Stream">T</a>&gt;&nbsp;merge(<a 
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title="class in org.apache.gearpump.streaming.dsl.scalaapi">Stream</a>&lt;<a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="type parameter in Stream">T</a>&gt;&nbsp;other,
+                       int&nbsp;parallelism,
                        java.lang.String&nbsp;description)</pre>
 <div class="block">Merges data from two stream into one
  <p></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>other</code> - the other stream</dd>
+<dd><code>parallelism</code> - (undocumented)</dd>
 <dd><code>description</code> - (undocumented)</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the merged stream</dd>
@@ -598,22 +621,20 @@ extends java.lang.Object</pre>
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 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
-<dd><code>win</code> - window definition</dd>
-<dd><code>description</code> - window description</dd>
+<dd><code>windows</code> - window definition</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/WindowStream.html"
 title="class in 
org.apache.gearpump.streaming.dsl.scalaapi"><code>WindowStream</code></a> where 
groupBy could be applied</dd>
+<dd>the windowed <a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/Stream.html" 
title="class in 
org.apache.gearpump.streaming.dsl.scalaapi"><code>Stream</code></a></dd>
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title="Style">
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diff --git 
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b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/StreamApp.html
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 <title>StreamApp</title>
-<meta name="date" content="2017-04-25">
+<meta name="date" content="2017-07-09">
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title="Style">
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b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/StreamAppSpec.html
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@@ -2,9 +2,9 @@
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-<meta name="date" content="2017-04-25">
+<meta name="date" content="2017-07-09">
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b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.Join.html
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a/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.Join.html
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 <head>
-<!-- Generated by javadoc (1.8.0_121) on Tue Apr 25 03:06:36 SST 2017 -->
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-<meta name="date" content="2017-04-25">
+<meta name="date" content="2017-07-09">
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title="Style">
 <script type="text/javascript" src="../../../../../../script.js"></script>
 </head>
@@ -49,7 +49,7 @@ var activeTableTab = "activeTableTab";
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 <ul class="navList">
 <li><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.html"
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class="typeNameLink">Prev&nbsp;Class</span></a></li>
-<li><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/WindowStream.html"
 title="class in org.apache.gearpump.streaming.dsl.scalaapi"><span 
class="typeNameLink">Next&nbsp;Class</span></a></li>
+<li>Next&nbsp;Class</li>
 </ul>
 <ul class="navList">
 <li><a 
href="../../../../../../index.html?org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.Join.html"
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@@ -161,7 +161,7 @@ extends <a 
href="../../../../../../org/apache/gearpump/streaming/task/Task.html"
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org.apache.gearpump">Message</a>&nbsp;msg)</code>
+<td class="colLast"><code><span class="memberNameLink"><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.Join.html#onNext-org.apache.gearpump.Message-">onNext</a></span>(<a
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org.apache.gearpump">Message</a>&nbsp;msg)</code>
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-<pre>public&nbsp;void&nbsp;onNext(<a 
href="../../../../../../org/apache/gearpump/Message.html" title="class in 
org.apache.gearpump">Message</a>&nbsp;msg)</pre>
+<pre>public&nbsp;void&nbsp;onNext(<a 
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org.apache.gearpump">Message</a>&nbsp;msg)</pre>
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interface:&nbsp;<code><a 
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href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.html"
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-<li><a 
href="../../../../../../org/apache/gearpump/streaming/dsl/scalaapi/WindowStream.html"
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class="typeNameLink">Next&nbsp;Class</span></a></li>
+<li>Next&nbsp;Class</li>
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 <li><a 
href="../../../../../../index.html?org/apache/gearpump/streaming/dsl/scalaapi/StreamSpec.Join.html"
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diff --git 
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+<meta name="date" content="2017-07-09">
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diff --git 
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b/content/releases/latest/api/java/org/apache/gearpump/streaming/dsl/scalaapi/WindowStream.html
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-<li><a href="package-tree.html">Tree</a></li>
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-<li><a href="../../../../../../index-all.html">Index</a></li>
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