add projects for maven, gradle and sbt for java and scala

.gitignore

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-SparkBuildExamples*
-gradle*
-*/.gradle
 */build
 */target
-*/gradle
 .gradle

README.md

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+# Example projects for using DSE Analytics
+
+These are template projects that illustrate how to build Spark Application written in Java or Scala with 
+Maven, SBT or Gradle. Navigate to project that implements simple write-to-/read-from-Cassandra 
+application with language and build tool of your choice.
+
+## Dependencies
+
+Compiling Spark Applications depends on `Apache Spark` and optionally on `Spark Cassandra Connector` 
+jars. Projects `dse` and `oss` show two different ways of supplying these dependencies. 
+Both projects are built and executed with similar commands.
+
+### DSE 
+
+If you are planning to execute your Spark Application on a DSE cluster, you can use `dse` project 
+template which will automatically download (and use during compilation) all jars available in DSE cluster. 
+Please mind DSE version specified in build file, it should should match the one in your cluster.
+
+### OSS
+
+If you are planning to execute your Spark Application against Open Source Apache Spark and Open Source 
+Apache Cassandra, use `oss` project template where all dependencies have to be specified manually in 
+build files. Please mind dependencies versions, these should match the ones in your execution environment.
+
+### Additional dependencies
+
+Prepared projects use extra plugins so additional dependencies can be included with your 
+application's jar. All you need to do is add dependencies in build configuration file.
+
+## Building & running
+
+### Sbt
+
+`sbt clean assembly`
+`dse spark-submit --class com.datastax.spark.example.scala.WriteRead target/scala-2.10/writeRead-assembly-0.1.jar`
+
+### Gradle
+
+`gradle clean build`
+`dse spark-submit --class com.datastax.spark.example.scala.WriteRead build/libs/writeRead-0.1.jar`
+
+### Maven
+
+`mvn clean package`
+`dse spark-submit --class com.datastax.spark.example.scala.WriteRead target/writeRead-0.1-dep.jar`
+
+
+

java/gradle/dse/.gitignore

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+build
+.idea

java/gradle/dse/build.gradle

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+group 'com.datastax.spark.example'
+version '0.1'
+apply plugin: 'java'
+
+repositories {
+    mavenCentral()
+    maven {
+        url "https://datastax.artifactoryonline.com/datastax/public-repos/"
+    }
+}
+
+configurations {
+    provided
+    compile.extendsFrom provided
+}
+
+// Please make sure that following DSE version matches your DSE cluster version.
+dependencies {
+    provided "com.datastax.dse:dse-spark-dependencies:5.0.1"
+    // compile "your:dependecy:1.0.0"
+}
+
+jar {
+    dependsOn configurations.runtime
+    from {
+        (configurations.runtime - configurations.provided).collect { it.isDirectory() ? it : zipTree(it) }
+    } {
+        exclude "META-INF/*.SF"
+        exclude "META-INF/*.DSA"
+        exclude "META-INF/*.RSA"
+    }
+}
+

java/gradle/dse/settings.gradle

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+rootProject.name = 'writeRead'

java/gradle/dse/src/main

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+../../../sbt/dse/src/main/

java/gradle/oss/.gitignore

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+build
+.idea

java/gradle/oss/build.gradle

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+group 'com.datastax.spark.example'
+version '0.1'
+apply plugin: 'java'
+
+repositories {
+    mavenCentral()
+}
+
+configurations {
+    provided
+    compile.extendsFrom provided
+}
+
+// Please make sure that following dependencies have versions corresponding to the ones in your cluster.
+dependencies {
+    provided "org.apache.spark:spark-core_2.10:1.6.1"
+    provided "org.apache.spark:spark-sql_2.10:1.6.1"
+    provided "com.datastax.spark:spark-cassandra-connector_2.10:1.6.0"
+    // compile "your:dependecy:1.0.0"
+}
+
+jar {
+    dependsOn configurations.runtime
+    from {
+        (configurations.runtime - configurations.provided).collect { it.isDirectory() ? it : zipTree(it) }
+    } {
+        exclude "META-INF/*.SF"
+        exclude "META-INF/*.DSA"
+        exclude "META-INF/*.RSA"
+    }
+}

java/gradle/oss/settings.gradle

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+rootProject.name = 'writeRead'

java/gradle/oss/src/main

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+../../../sbt/dse/src/main/

java/maven/dse/.gitignore

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+*.iml
+.idea/
+target

java/maven/dse/pom.xml

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+<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.datastax.spark.example</groupId>
+  <artifactId>writeRead</artifactId>
+  <version>0.1</version>
+  <packaging>jar</packaging>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.datastax.dse</groupId>
+      <artifactId>dse-spark-dependencies</artifactId>
+      <version>5.0.1</version>
+      <scope>provided</scope>
+    </dependency>
+    <!-- Your dependencies, 'provided' are not included in jar -->
+  </dependencies>
+
+  <repositories>
+    <repository>
+      <id>DataStax-Repo</id>
+      <url>https://datastax.artifactoryonline.com/datastax/public-repos/</url>
+    </repository>
+  </repositories>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.5.1</version>
+        <configuration>
+          <source>1.8</source>
+          <target>1.8</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>2.6</version>
+        <configuration>
+          <descriptor>src/assembly/dep.xml</descriptor>
+        </configuration>
+        <executions>
+          <execution>
+            <id>create-archive</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

java/maven/dse/src/assembly

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+../../../../scala/maven/dse/src/assembly/

java/maven/dse/src/main

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+../../../sbt/dse/src/main/

java/maven/oss/.gitignore

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+*.iml
+.idea/
+target