diff --git a/VL03-03-01/build.gradle b/VL03-03-01/build.gradle new file mode 100644 index 0000000..a095807 --- /dev/null +++ b/VL03-03-01/build.gradle @@ -0,0 +1,26 @@ +apply plugin: 'java' + +apply plugin: 'eclipse' +// Run 'gradlew eclipse' for the eclipse project + +apply plugin: 'idea' +// Run 'gradle idea' for the IntelliJ idea project (no longer necessary in idea 13) + +// Netbeans: See http://plugins.netbeans.org/plugin/44510/gradle-support + + +apply plugin:'application' +// Rung 'gradle run' to execute main program + +mainClassName = "de.dhbw.parprog.ThreadPool" + + +repositories { + mavenCentral() +} + +dependencies { + implementation 'commons-lang:commons-lang:2.6' + testImplementation 'junit:junit:4.11' + testImplementation 'org.easytesting:fest-assert:1.4' +} diff --git a/VL03-03-01/gradle/wrapper/gradle-wrapper.jar b/VL03-03-01/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..085a1cd Binary files /dev/null and b/VL03-03-01/gradle/wrapper/gradle-wrapper.jar differ diff --git a/VL03-03-01/gradle/wrapper/gradle-wrapper.properties b/VL03-03-01/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..f934c8a --- /dev/null +++ b/VL03-03-01/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Sun Mar 15 22:48:49 CET 2015 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip diff --git a/VL03-03-01/gradlew b/VL03-03-01/gradlew new file mode 100644 index 0000000..91a7e26 --- /dev/null +++ b/VL03-03-01/gradlew @@ -0,0 +1,164 @@ +#!/usr/bin/env bash + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS="" + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn ( ) { + echo "$*" +} + +die ( ) { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; +esac + +# For Cygwin, ensure paths are in UNIX format before anything is touched. +if $cygwin ; then + [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"` +fi + +# 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\"`/" >&- +APP_HOME="`pwd -P`" +cd "$SAVED" >&- + +CLASSPATH=$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" ] ; 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, switch paths to Windows format before running java +if $cygwin ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + + # 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`="\"$arg\"" + fi + i=$((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 + +# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules +function splitJvmOpts() { + JVM_OPTS=("$@") +} +eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS +JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" + +exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" diff --git a/VL03-03-01/gradlew.bat b/VL03-03-01/gradlew.bat new file mode 100644 index 0000000..8a0b282 --- /dev/null +++ b/VL03-03-01/gradlew.bat @@ -0,0 +1,90 @@ +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS= + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto init + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto init + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:init +@rem Get command-line arguments, handling Windowz variants + +if not "%OS%" == "Windows_NT" goto win9xME_args +if "%@eval[2+2]" == "4" goto 4NT_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* +goto execute + +:4NT_args +@rem Get arguments from the 4NT Shell from JP Software +set CMD_LINE_ARGS=%$ + +: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 diff --git a/VL03-03-01/src/main/java/de/dhbw/parprog/ThreadPool.java b/VL03-03-01/src/main/java/de/dhbw/parprog/ThreadPool.java new file mode 100644 index 0000000..f94cd00 --- /dev/null +++ b/VL03-03-01/src/main/java/de/dhbw/parprog/ThreadPool.java @@ -0,0 +1,78 @@ +package de.dhbw.parprog; + +import java.util.ArrayList; +import java.util.concurrent.Callable; +import java.util.concurrent.CancellationException; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; + +/** + * Example of using a thread pool. + */ +public class ThreadPool { + + /** + * Number of threads used in the thread pool. + */ + private final int NUMBER_OF_THREADS = 5; + + /** + * Number of tasks to execute in thread pool. + */ + private final int NUMBER_OF_TASKS = 10; + + /** + * Method to do a partial calculation. + * @return The result of the partial calculation. + */ + private static int doPartialCalculation() { + try { + Thread.sleep(1000); + return 42; + } catch (InterruptedException e) { + e.printStackTrace(); + return 0; + } + } + + /** + * A method to do a calculation using a thread pool. + * @return The result of the calculation. + */ + public int doCalculation() { + ExecutorService executor = Executors.newFixedThreadPool(NUMBER_OF_THREADS); + ArrayList> futures = new ArrayList>(); + int result = 0; + + for (int i = 0; i < NUMBER_OF_TASKS; i++) { + Callable task = () -> { + return ThreadPool.doPartialCalculation(); + }; + futures.add(executor.submit(task)); + } + + for (Future future : futures) { + try { + result += future.get(); + } catch (InterruptedException | ExecutionException | CancellationException e) { + e.printStackTrace(); + } + } + + executor.shutdown(); + return result; + } + + public static void main(String[] args) { + ThreadPool test = new ThreadPool(); + System.out.println("Calculation started"); + long start = System.nanoTime(); + int result = test.doCalculation(); + long elapsed = System.nanoTime() - start; + System.out.println("Result: " + result); + System.out.println("Time: " + TimeUnit.NANOSECONDS.toSeconds(elapsed) + " seconds"); + } +} diff --git a/VL03-03-01/src/test/java/de/dhbw/parprog/ThreadPoolTest.java b/VL03-03-01/src/test/java/de/dhbw/parprog/ThreadPoolTest.java new file mode 100644 index 0000000..903ceac --- /dev/null +++ b/VL03-03-01/src/test/java/de/dhbw/parprog/ThreadPoolTest.java @@ -0,0 +1,16 @@ +package de.dhbw.parprog; + +import static org.fest.assertions.Assertions.assertThat; + +import org.junit.Test; +import org.junit.runner.RunWith; +import org.junit.runners.JUnit4; + +@RunWith(JUnit4.class) +public class ThreadPoolTest { + @Test + public void calculationReturnsCorrectResult() { + ThreadPool test = new ThreadPool(); + assertThat(test.doCalculation()).isEqualTo(10*42); + } +}