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From t..@apache.org
Subject [07/19] apex-malhar git commit: Added deduper example. Updated malhar version to 3.5.0
Date Mon, 27 Mar 2017 15:19:08 GMT
Added deduper example.
Updated malhar version to 3.5.0


Project: http://git-wip-us.apache.org/repos/asf/apex-malhar/repo
Commit: http://git-wip-us.apache.org/repos/asf/apex-malhar/commit/45735280
Tree: http://git-wip-us.apache.org/repos/asf/apex-malhar/tree/45735280
Diff: http://git-wip-us.apache.org/repos/asf/apex-malhar/diff/45735280

Branch: refs/heads/master
Commit: 4573528050751bc4d9e440bcd7e7a08560956106
Parents: 63df474
Author: bhupeshchawda <bhupeshchawda@gmail.com>
Authored: Mon Jul 25 19:02:17 2016 +0530
Committer: Lakshmi Prasanna Velineni <lakshmi@datatorrent.com>
Committed: Sun Mar 26 11:43:48 2017 -0700

----------------------------------------------------------------------
 examples/dedup/README.md                        |  16 ++
 examples/dedup/XmlJavadocCommentsExtractor.xsl  |  44 +++
 examples/dedup/pom.xml                          | 280 +++++++++++++++++++
 examples/dedup/src/assemble/appPackage.xml      |  43 +++
 .../java/com/example/dedup/Application.java     | 123 ++++++++
 .../src/main/resources/META-INF/properties.xml  |  40 +++
 .../java/com/example/dedup/ApplicationTest.java |  38 +++
 .../dedup/src/test/resources/log4j.properties   |  22 ++
 8 files changed, 606 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/README.md
----------------------------------------------------------------------
diff --git a/examples/dedup/README.md b/examples/dedup/README.md
new file mode 100644
index 0000000..207a0c4
--- /dev/null
+++ b/examples/dedup/README.md
@@ -0,0 +1,16 @@
+This sample application shows how to use the Dedup operator for de-duplicating in a stream
of incoming data.
+The operators in the application are as follows:
+1. Random data generator (RandomGenerator) which emits POJO tuples as records
+2. Dedup operator (Deduper) which accepts the POJO tuples and identifies unique and duplicate
tuples.
+3. Console operator (ConsoleUnique) for unique tuples
+4. Console operator (ConsoleDuplicate) for duplicate tuples
+5. Console operator (ConsoleExpired) for expired tuples
+
+The following properties are configured for using the Application:
+1. ```dt.application.DedupExample.operator.RandomGenerator.prop.tuplesPerWindow``` - This
is a limit on the number of tuples that will be generated by the Random Generator operator.
+2. ```dt.application.DedupExample.operator.Deduper.prop.keyExpression``` - This is the pseudo
java expression for deriving the key fields from the incoming POJO.
+3. ```dt.application.DedupExample.operator.Deduper.prop.timeExpression``` - This is the pseudo
java expression for deriving the time field in the incoming POJO. In case, ```timeExpression```
is not specified, then the System time is used to compute the expiration for the tuples.
+4. ```dt.application.DedupExample.operator.Deduper.prop.expireBefore``` - The expiry time
for incoming tuples in seconds. The keys in the system expire after every ```expireBefore```
seconds.
+5. ```dt.application.DedupExample.operator.Deduper.prop.bucketSpan``` - The span of a single
expiry bucket. When an expiry time elapses, the bucket as a whole is discarded from the system.
This can be set keeping in mind the largest unit that can be discarded. For example, if ```expireBefore```
is set to 1 hour, and we are getting new data per minuite, it would make sense to set the
```bucketSpan``` to 1 minute or 5 minutes.
+
+Example values for these parameters have been specified in  src/main/resources/META-INF/properties.xml.

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/XmlJavadocCommentsExtractor.xsl
----------------------------------------------------------------------
diff --git a/examples/dedup/XmlJavadocCommentsExtractor.xsl b/examples/dedup/XmlJavadocCommentsExtractor.xsl
new file mode 100644
index 0000000..08075a9
--- /dev/null
+++ b/examples/dedup/XmlJavadocCommentsExtractor.xsl
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Licensed 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.
+
+-->
+
+<!--
+    Document   : XmlJavadocCommentsExtractor.xsl
+    Created on : September 16, 2014, 11:30 AM
+    Description:
+        The transformation strips off all information except for comments and tags from xml
javadoc generated by xml-doclet.
+-->
+
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+  <xsl:output method="xml" standalone="yes"/>
+
+  <!-- copy xml by selecting only the following nodes, attributes and text -->
+  <xsl:template match="node()|text()|@*">
+    <xsl:copy>
+      <xsl:apply-templates select="root|package|class|interface|method|field|type|comment|tag|text()|@name|@qualified|@text"/>
+    </xsl:copy>
+  </xsl:template>
+
+  <!-- Strip off the following paths from the selected xml -->
+  <xsl:template match="//root/package/interface/interface
+                      |//root/package/interface/method/@qualified
+                      |//root/package/class/interface
+                      |//root/package/class/class
+                      |//root/package/class/method/@qualified
+                      |//root/package/class/field/@qualified" />
+
+  <xsl:strip-space elements="*"/>
+</xsl:stylesheet>

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/pom.xml
----------------------------------------------------------------------
diff --git a/examples/dedup/pom.xml b/examples/dedup/pom.xml
new file mode 100644
index 0000000..f777784
--- /dev/null
+++ b/examples/dedup/pom.xml
@@ -0,0 +1,280 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.example</groupId>
+  <version>1.0-SNAPSHOT</version>
+  <artifactId>dedup</artifactId>
+  <packaging>jar</packaging>
+
+  <!-- change these to the appropriate values -->
+  <name>My Apex Application</name>
+  <description>My Apex Application Description</description>
+
+  <properties>
+    <!-- change this if you desire to use a different version of Apex Core -->
+    <apex.version>3.5.0</apex.version>
+    <malhar.version>3.6.0</malhar.version>
+    <apex.apppackage.classpath>lib/*.jar</apex.apppackage.classpath>
+  </properties>
+
+  <build>
+    <plugins>
+       <plugin>
+         <groupId>org.apache.maven.plugins</groupId>
+         <artifactId>maven-eclipse-plugin</artifactId>
+         <version>2.9</version>
+         <configuration>
+           <downloadSources>true</downloadSources>
+         </configuration>
+       </plugin>
+       <plugin>
+         <artifactId>maven-compiler-plugin</artifactId>
+         <version>3.3</version>
+         <configuration>
+           <encoding>UTF-8</encoding>
+           <source>1.7</source>
+           <target>1.7</target>
+           <debug>true</debug>
+           <optimize>false</optimize>
+           <showDeprecation>true</showDeprecation>
+           <showWarnings>true</showWarnings>
+         </configuration>
+       </plugin>
+       <plugin>
+         <artifactId>maven-dependency-plugin</artifactId>
+         <version>2.8</version>
+         <executions>
+           <execution>
+             <id>copy-dependencies</id>
+             <phase>prepare-package</phase>
+             <goals>
+               <goal>copy-dependencies</goal>
+             </goals>
+             <configuration>
+               <outputDirectory>target/deps</outputDirectory>
+               <includeScope>runtime</includeScope>
+             </configuration>
+           </execution>
+         </executions>
+       </plugin>
+
+       <plugin>
+         <artifactId>maven-assembly-plugin</artifactId>
+         <executions>
+           <execution>
+             <id>app-package-assembly</id>
+             <phase>package</phase>
+             <goals>
+               <goal>single</goal>
+             </goals>
+             <configuration>
+               <finalName>${project.artifactId}-${project.version}-apexapp</finalName>
+               <appendAssemblyId>false</appendAssemblyId>
+               <descriptors>
+                 <descriptor>src/assemble/appPackage.xml</descriptor>
+               </descriptors>
+               <archiverConfig>
+                 <defaultDirectoryMode>0755</defaultDirectoryMode>
+               </archiverConfig>
+               <archive>
+                 <manifestEntries>
+                   <Class-Path>${apex.apppackage.classpath}</Class-Path>
+                   <DT-Engine-Version>${apex.version}</DT-Engine-Version>
+                   <DT-App-Package-Group-Id>${project.groupId}</DT-App-Package-Group-Id>
+                   <DT-App-Package-Name>${project.artifactId}</DT-App-Package-Name>
+                   <DT-App-Package-Version>${project.version}</DT-App-Package-Version>
+                   <DT-App-Package-Display-Name>${project.name}</DT-App-Package-Display-Name>
+                   <DT-App-Package-Description>${project.description}</DT-App-Package-Description>
+                 </manifestEntries>
+               </archive>
+             </configuration>
+           </execution>
+         </executions>
+       </plugin>
+
+       <plugin>
+         <artifactId>maven-antrun-plugin</artifactId>
+         <version>1.7</version>
+         <executions>
+           <execution>
+             <phase>package</phase>
+             <configuration>
+               <target>
+                 <move file="${project.build.directory}/${project.artifactId}-${project.version}-apexapp.jar"
+                       tofile="${project.build.directory}/${project.artifactId}-${project.version}.apa"
/>
+               </target>
+             </configuration>
+             <goals>
+               <goal>run</goal>
+             </goals>
+           </execution>
+           <execution>
+             <!-- create resource directory for xml javadoc-->
+             <id>createJavadocDirectory</id>
+             <phase>generate-resources</phase>
+             <configuration>
+               <tasks>
+                 <delete dir="${project.build.directory}/generated-resources/xml-javadoc"/>
+                 <mkdir dir="${project.build.directory}/generated-resources/xml-javadoc"/>
+               </tasks>
+             </configuration>
+             <goals>
+               <goal>run</goal>
+             </goals>
+           </execution>
+         </executions>
+       </plugin>
+
+       <plugin>
+         <groupId>org.codehaus.mojo</groupId>
+         <artifactId>build-helper-maven-plugin</artifactId>
+         <version>1.9.1</version>
+         <executions>
+           <execution>
+             <id>attach-artifacts</id>
+             <phase>package</phase>
+             <goals>
+               <goal>attach-artifact</goal>
+             </goals>
+             <configuration>
+               <artifacts>
+                 <artifact>
+                   <file>target/${project.artifactId}-${project.version}.apa</file>
+                   <type>apa</type>
+                 </artifact>
+               </artifacts>
+               <skipAttach>false</skipAttach>
+             </configuration>
+           </execution>
+         </executions>
+       </plugin>
+
+      <!-- generate javdoc -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <executions>
+          <!-- generate xml javadoc -->
+          <execution>
+            <id>xml-doclet</id>
+            <phase>generate-resources</phase>
+            <goals>
+              <goal>javadoc</goal>
+            </goals>
+            <configuration>
+              <doclet>com.github.markusbernhardt.xmldoclet.XmlDoclet</doclet>
+              <additionalparam>-d ${project.build.directory}/generated-resources/xml-javadoc
-filename ${project.artifactId}-${project.version}-javadoc.xml</additionalparam>
+              <useStandardDocletOptions>false</useStandardDocletOptions>
+              <docletArtifact>
+                <groupId>com.github.markusbernhardt</groupId>
+                <artifactId>xml-doclet</artifactId>
+                <version>1.0.4</version>
+              </docletArtifact>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <!-- Transform xml javadoc to stripped down version containing only class/interface
comments and tags-->
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>xml-maven-plugin</artifactId>
+        <version>1.0</version>
+        <executions>
+          <execution>
+            <id>transform-xmljavadoc</id>
+            <phase>generate-resources</phase>
+            <goals>
+              <goal>transform</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <transformationSets>
+            <transformationSet>
+              <dir>${project.build.directory}/generated-resources/xml-javadoc</dir>
+              <includes>
+                <include>${project.artifactId}-${project.version}-javadoc.xml</include>
+              </includes>
+              <stylesheet>XmlJavadocCommentsExtractor.xsl</stylesheet>
+              <outputDir>${project.build.directory}/generated-resources/xml-javadoc</outputDir>
+            </transformationSet>
+          </transformationSets>
+        </configuration>
+      </plugin>
+      <!-- copy xml javadoc to class jar -->
+      <plugin>
+        <artifactId>maven-resources-plugin</artifactId>
+        <version>2.6</version>
+        <executions>
+          <execution>
+            <id>copy-resources</id>
+            <phase>process-resources</phase>
+            <goals>
+              <goal>copy-resources</goal>
+            </goals>
+            <configuration>
+              <outputDirectory>${basedir}/target/classes</outputDirectory>
+              <resources>
+                <resource>
+                  <directory>${project.build.directory}/generated-resources/xml-javadoc</directory>
+                  <includes>
+                    <include>${project.artifactId}-${project.version}-javadoc.xml</include>
+                  </includes>
+                  <filtering>true</filtering>
+                </resource>
+              </resources>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+
+    </plugins>
+
+  </build>
+
+  <dependencies>
+    <!-- add your dependencies here -->
+    <dependency>
+      <groupId>org.apache.apex</groupId>
+      <artifactId>malhar-library</artifactId>
+      <version>${malhar.version}</version>
+      <!--
+           If you know that your application does not need transitive dependencies pulled
in by malhar-library,
+           uncomment the following to reduce the size of your app package.
+      -->
+      <!--
+      <exclusions>
+        <exclusion>
+          <groupId>*</groupId>
+          <artifactId>*</artifactId>
+        </exclusion>
+      </exclusions>
+      -->
+    </dependency>
+    <dependency>
+      <groupId>org.apache.apex</groupId>
+      <artifactId>apex-common</artifactId>
+      <version>${apex.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.10</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.apex</groupId>
+      <artifactId>apex-engine</artifactId>
+      <version>${apex.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.codehaus.janino</groupId>
+      <artifactId>janino</artifactId>
+      <version>2.7.8</version>
+    </dependency>
+  </dependencies>
+
+</project>

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/src/assemble/appPackage.xml
----------------------------------------------------------------------
diff --git a/examples/dedup/src/assemble/appPackage.xml b/examples/dedup/src/assemble/appPackage.xml
new file mode 100644
index 0000000..7ad071c
--- /dev/null
+++ b/examples/dedup/src/assemble/appPackage.xml
@@ -0,0 +1,43 @@
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2
http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+  <id>appPackage</id>
+  <formats>
+    <format>jar</format>
+  </formats>
+  <includeBaseDirectory>false</includeBaseDirectory>
+  <fileSets>
+    <fileSet>
+      <directory>${basedir}/target/</directory>
+      <outputDirectory>/app</outputDirectory>
+      <includes>
+        <include>${project.artifactId}-${project.version}.jar</include>
+      </includes>
+    </fileSet>
+    <fileSet>
+      <directory>${basedir}/target/deps</directory>
+      <outputDirectory>/lib</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>${basedir}/src/site/conf</directory>
+      <outputDirectory>/conf</outputDirectory>
+      <includes>
+        <include>*.xml</include>
+      </includes>
+    </fileSet>
+    <fileSet>
+      <directory>${basedir}/src/main/resources/META-INF</directory>
+      <outputDirectory>/META-INF</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>${basedir}/src/main/resources/app</directory>
+      <outputDirectory>/app</outputDirectory>
+    </fileSet>
+    <fileSet>
+      <directory>${basedir}/src/main/resources/resources</directory>
+      <outputDirectory>/resources</outputDirectory>
+    </fileSet>
+  </fileSets>
+
+</assembly>
+

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/src/main/java/com/example/dedup/Application.java
----------------------------------------------------------------------
diff --git a/examples/dedup/src/main/java/com/example/dedup/Application.java b/examples/dedup/src/main/java/com/example/dedup/Application.java
new file mode 100644
index 0000000..cabdce2
--- /dev/null
+++ b/examples/dedup/src/main/java/com/example/dedup/Application.java
@@ -0,0 +1,123 @@
+/**
+ * Put your copyright and license info here.
+ */
+package com.example.dedup;
+
+import java.util.Date;
+import java.util.Random;
+
+import org.apache.apex.malhar.lib.dedup.TimeBasedDedupOperator;
+import org.apache.hadoop.conf.Configuration;
+
+import com.datatorrent.api.annotation.ApplicationAnnotation;
+import com.datatorrent.common.partitioner.StatelessPartitioner;
+import com.datatorrent.common.util.BaseOperator;
+import com.datatorrent.lib.io.ConsoleOutputOperator;
+import com.datatorrent.api.StreamingApplication;
+import com.datatorrent.api.Context;
+import com.datatorrent.api.DAG;
+import com.datatorrent.api.DefaultOutputPort;
+import com.datatorrent.api.InputOperator;
+
+@ApplicationAnnotation(name="DedupExample")
+public class Application implements StreamingApplication
+{
+
+  @Override
+  public void populateDAG(DAG dag, Configuration conf)
+  {
+    // Test Data Generator Operator
+    RandomDataGeneratorOperator gen = dag.addOperator("RandomGenerator", new RandomDataGeneratorOperator());
+
+    // Dedup Operator. Configuration through resources/META-INF/properties.xml
+    TimeBasedDedupOperator dedup = dag.addOperator("Deduper", new TimeBasedDedupOperator());
+
+    // Console output operator for unique tuples
+    ConsoleOutputOperator consoleUnique = dag.addOperator("ConsoleUnique", new ConsoleOutputOperator());
+
+    // Console output operator for duplicate tuples
+    ConsoleOutputOperator consoleDuplicate = dag.addOperator("ConsoleDuplicate", new ConsoleOutputOperator());
+
+    // Console output operator for duplicate tuples
+    ConsoleOutputOperator consoleExpired = dag.addOperator("ConsoleExpired", new ConsoleOutputOperator());
+
+    // Streams
+    dag.addStream("Generator to Dedup", gen.output, dedup.input);
+
+    // Connect Dedup unique to Console
+    dag.addStream("Dedup Unique to Console", dedup.unique, consoleUnique.input);
+    // Connect Dedup duplicate to Console
+    dag.addStream("Dedup Duplicate to Console", dedup.duplicate, consoleDuplicate.input);
+    // Connect Dedup expired to Console
+    dag.addStream("Dedup Expired to Console", dedup.expired, consoleExpired.input);
+
+    // Set Attribute TUPLE_CLASS for supplying schema information to the port
+    dag.setInputPortAttribute(dedup.input, Context.PortContext.TUPLE_CLASS, TestEvent.class);
+
+    // Uncomment the following line to create multiple partitions for Dedup operator. In
this case: 2
+    // dag.setAttribute(dedup, Context.OperatorContext.PARTITIONER, new StatelessPartitioner<TimeBasedDedupOperator>(2));
+  }
+
+  public static class RandomDataGeneratorOperator extends BaseOperator implements InputOperator
+  {
+
+    public final transient DefaultOutputPort<TestEvent> output = new DefaultOutputPort<>();
+    private final transient Random r = new Random();
+    private int tuplesPerWindow = 100;
+    private transient int count = 0;
+
+    @Override
+    public void beginWindow(long windowId) {
+      count = 0;
+    }
+
+    @Override
+    public void emitTuples()
+    {
+      if (count++ > tuplesPerWindow) {
+        return;
+      }
+      TestEvent event = new TestEvent();
+      event.id = r.nextInt(100);
+      event.eventTime = new Date(System.currentTimeMillis() - (r.nextInt(60 * 1000)));
+      output.emit(event);
+    }
+  }
+
+  public static class TestEvent
+  {
+    private int id;
+    private Date eventTime;
+
+    public TestEvent()
+    {
+    }
+
+    public int getId()
+    {
+      return id;
+    }
+
+    public void setId(int id)
+    {
+      this.id = id;
+    }
+
+    public Date getEventTime()
+    {
+      return eventTime;
+    }
+
+    public void setEventTime(Date eventTime)
+    {
+      this.eventTime = eventTime;
+    }
+
+    @Override
+    public String toString() {
+      return "TestEvent [id=" + id + ", eventTime=" + eventTime + "]";
+    }
+
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/src/main/resources/META-INF/properties.xml
----------------------------------------------------------------------
diff --git a/examples/dedup/src/main/resources/META-INF/properties.xml b/examples/dedup/src/main/resources/META-INF/properties.xml
new file mode 100644
index 0000000..ffe3350
--- /dev/null
+++ b/examples/dedup/src/main/resources/META-INF/properties.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+<configuration>
+  <property>
+    <name>dt.application.DedupExample.operator.RandomGenerator.prop.tuplesPerWindow</name>
+    <value>100</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.Deduper.prop.keyExpression</name>
+    <value>id</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.Deduper.prop.timeExpression</name>
+    <value>eventTime.getTime()</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.Deduper.prop.bucketSpan</name>
+    <value>10</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.Deduper.prop.expireBefore</name>
+    <value>60</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.ConsoleUnique.prop.stringFormat</name>
+    <value>Unique: %s</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.ConsoleDuplicate.prop.stringFormat</name>
+    <value>Duplicate: %s</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.ConsoleExpired.prop.stringFormat</name>
+    <value>Expired: %s</value>
+  </property>
+  <property>
+    <name>dt.application.DedupExample.operator.*.attr.MEMORY_MB</name>
+    <value>512</value>
+  </property>
+</configuration>
+

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/src/test/java/com/example/dedup/ApplicationTest.java
----------------------------------------------------------------------
diff --git a/examples/dedup/src/test/java/com/example/dedup/ApplicationTest.java b/examples/dedup/src/test/java/com/example/dedup/ApplicationTest.java
new file mode 100644
index 0000000..9c9f17c
--- /dev/null
+++ b/examples/dedup/src/test/java/com/example/dedup/ApplicationTest.java
@@ -0,0 +1,38 @@
+/**
+ * Put your copyright and license info here.
+ */
+package com.example.dedup;
+
+import java.io.IOException;
+
+import javax.validation.ConstraintViolationException;
+
+import org.junit.Assert;
+
+import org.apache.hadoop.conf.Configuration;
+import org.junit.Test;
+
+import com.datatorrent.api.LocalMode;
+import com.example.dedup.Application;
+
+/**
+ * Test the DAG declaration in local mode.
+ */
+public class ApplicationTest {
+
+  @Test
+  public void testApplication() throws IOException, Exception {
+    try {
+      LocalMode lma = LocalMode.newInstance();
+      Configuration conf = new Configuration(false);
+      conf.addResource(this.getClass().getResourceAsStream("/META-INF/properties.xml"));
+      lma.prepareDAG(new Application(), conf);
+      LocalMode.Controller lc = lma.getController();
+      lc.runAsync();
+      Thread.sleep(10 * 1000);
+      lc.shutdown();
+    } catch (ConstraintViolationException e) {
+      Assert.fail("constraint violations: " + e.getConstraintViolations());
+    }
+  }
+}

http://git-wip-us.apache.org/repos/asf/apex-malhar/blob/45735280/examples/dedup/src/test/resources/log4j.properties
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diff --git a/examples/dedup/src/test/resources/log4j.properties b/examples/dedup/src/test/resources/log4j.properties
new file mode 100644
index 0000000..98544e8
--- /dev/null
+++ b/examples/dedup/src/test/resources/log4j.properties
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+log4j.rootLogger=DEBUG,CONSOLE
+
+log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
+log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
+log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} [%t] %-5p %c{2} %M - %m%n
+
+log4j.appender.RFA=org.apache.log4j.RollingFileAppender
+log4j.appender.RFA.layout=org.apache.log4j.PatternLayout
+log4j.appender.RFA.layout.ConversionPattern=%d{ISO8601} [%t] %-5p %c{2} %M - %m%n
+log4j.appender.RFA.File=/tmp/app.log
+
+# to enable, add SYSLOG to rootLogger
+log4j.appender.SYSLOG=org.apache.log4j.net.SyslogAppender
+log4j.appender.SYSLOG.syslogHost=127.0.0.1
+log4j.appender.SYSLOG.layout=org.apache.log4j.PatternLayout
+log4j.appender.SYSLOG.layout.conversionPattern=${dt.cid} %-5p [%t] %c{2} %x - %m%n
+log4j.appender.SYSLOG.Facility=LOCAL1
+
+#log4j.logger.org.apache.commons.beanutils=warn
+log4j.logger.com.datatorrent=debug
+log4j.logger.org.apache.apex=debug
+log4j.logger.org=info


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