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karthik 2020-07-09 13:26:50 +00:00
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# Compiled classes
*.class
# Gradle files
.gralde
# IntelliJ IDEA files
.idea
# Build files
build
# Log files
*.log
logs

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README.md Normal file
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# Spark Boilerplate
This is a boilerplate project for Apache Spark. The related blog post can be found at [https://www.barrelsofdata.com/spark-boilerplate-using-scala](https://www.barrelsofdata.com/spark-boilerplate-using-scala)
## Build instructions
From the root of the project execute the below commands
- To clear all compiled classes, build and log directories
```shell script
./gradlew clean
```
- To run tests
```shell script
./gradlew test
```
- To build jar
```shell script
./gradlew shadowJar
```
- All combined
```shell script
./gradlew clean test shadowJar
```
## Run
```shell script
spark-submit --master yarn --deploy-mode cluster build/libs/spark-boilerplate-1.0.jar
```

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build.gradle Normal file
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plugins {
id "scala"
id "com.github.johnrengelman.shadow" version "${shadowJarPluginVersion}"
}
group "${projectGroup}"
version "${projectVersion}"
repositories {
mavenCentral()
}
dependencies {
compileOnly group: "org.scala-lang", name:"scala-library", version: "${scalaMajorVersion}.${scalaMinorVersion}"
compileOnly group: "org.apache.spark", name: "spark-core_${scalaMajorVersion}", version: "${apacheSparkVersion}"
compileOnly group: "org.apache.spark", name: "spark-sql_${scalaMajorVersion}", version: "${apacheSparkVersion}"
testImplementation group: "org.scalatest", name: "scalatest_${scalaMajorVersion}", version: "${scalaTestVersion}"
}
configurations {
testImplementation.extendsFrom compileOnly
}
task scalaTest(dependsOn: ['testClasses'], type: JavaExec) {
main = 'org.scalatest.tools.Runner'
args = ['-R', 'build/classes/scala/test', '-o']
classpath = sourceSets.test.runtimeClasspath
}
test.dependsOn scalaTest
shadowJar {
mergeServiceFiles()
zip64 true
manifest {
attributes "Main-Class": "${mainClass}"
}
archiveFileName.set("${getArchiveBaseName().get()}-${projectVersion}.${getArchiveExtension().get()}")
}
clean.doFirst {
delete "logs/"
}

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gradle.properties Normal file
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scalaMajorVersion=2.12
scalaMinorVersion=10
apacheSparkVersion=3.0.0
scalaTestVersion=3.1.2
shadowJarPluginVersion=6.0.0
mainClass=com.barrelsofdata.sparkexamples.Driver
projectGroup=com.barrelsofdata.sparkexamples
projectVersion=1.0
org.gradle.daemon=false

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gradle/wrapper/gradle-wrapper.jar vendored Normal file

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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gradlew vendored Executable file
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#!/usr/bin/env sh
#
# Copyright 2015 the original author or authors.
#
# 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
#
# https://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.
#
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin or MSYS, switch paths to Windows format before running java
if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=`expr $i + 1`
done
case $i in
0) set -- ;;
1) set -- "$args0" ;;
2) set -- "$args0" "$args1" ;;
3) set -- "$args0" "$args1" "$args2" ;;
4) set -- "$args0" "$args1" "$args2" "$args3" ;;
5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=`save "$@"`
# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
exec "$JAVACMD" "$@"

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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:init
@rem Get command-line arguments, handling Windows variants
if not "%OS%" == "Windows_NT" goto win9xME_args
:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2
:win9xME_args_slurp
if "x%~1" == "x" goto execute
set CMD_LINE_ARGS=%*
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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rootProject.name = 'spark-boilerplate'

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package com.barrelsofdata.sparkexamples
import org.apache.log4j.Logger
import org.apache.spark.sql.SparkSession
object Driver {
val JOB_NAME: String = "Boilerplate"
val LOG: Logger = Logger.getLogger(this.getClass.getCanonicalName)
def main(args: Array[String]): Unit = {
val spark: SparkSession = SparkSession.builder().appName(JOB_NAME).getOrCreate()
spark.sql("SELECT 'hello' AS col1").show()
LOG.info("Dummy info message")
LOG.warn("Dummy warn message")
LOG.error("Dummy error message")
}
}

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log4j.rootLogger=INFO, console
log4j.logger.com.barrelsofdata.sparkexamples=INFO, console
log4j.additivity.com.barrelsofdata.sparkexamples=false
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.target=System.out
log4j.appender.console.immediateFlush=true
log4j.appender.console.encoding=UTF-8
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.conversionPattern=%d{yyyy/MM/dd HH:mm:ss} %p %c: %m%n
log4j.logger.org.apache=ERROR
log4j.logger.org.spark_project=ERROR
log4j.logger.org.sparkproject=ERROR
log4j.logger.parquet=ERROR

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package com.barrelsofdata.sparkexamples
import java.util.Properties
import org.apache.log4j.{LogManager, Logger, PropertyConfigurator}
import org.apache.spark.sql.SparkSession
import org.scalatest.BeforeAndAfterAll
import org.scalatest.funsuite.AnyFunSuite
class DriverTest extends AnyFunSuite with BeforeAndAfterAll {
val JOB_NAME: String = "Driver Test Job"
val LOGGER_PROPERTIES: String = "log4j-test.properties"
val LOG: Logger = Logger.getLogger(this.getClass.getCanonicalName)
var spark: SparkSession = _
def setupLogger(): Unit = {
val properties = new Properties
properties.load(getClass.getClassLoader.getResource(LOGGER_PROPERTIES).openStream())
LogManager.resetConfiguration()
PropertyConfigurator.configure(properties)
}
override def beforeAll: Unit = {
setupLogger()
LOG.info("Setting up spark session")
spark = SparkSession.builder().appName(JOB_NAME).master("local[*]").getOrCreate()
}
test("Check if spark session is working") {
LOG.info("Testing spark job")
assertResult("hello")(spark.sql("SELECT 'hello'").collect().head.get(0))
}
override def afterAll: Unit = {
LOG.info("Closing spark session")
spark.close()
}
}