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Commit 87ee62ff authored by Martin Schmollinger's avatar Martin Schmollinger
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#
# https://help.github.com/articles/dealing-with-line-endings/
#
# These are explicitly windows files and should use crlf
*.bat text eol=crlf
# Created by https://www.toptal.com/developers/gitignore/api/gradle,java
# Edit at https://www.toptal.com/developers/gitignore?templates=gradle,java
### Java ###
# Compiled class file
*.class
# Log file
*.log
# BlueJ files
*.ctxt
# Mobile Tools for Java (J2ME)
.mtj.tmp/
# Package Files #
*.jar
*.war
*.nar
*.ear
*.zip
*.tar.gz
*.rar
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
### Gradle ###
.gradle
build/
# Ignore Gradle GUI config
gradle-app.setting
# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
!gradle-wrapper.jar
# Cache of project
.gradletasknamecache
# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
# gradle/wrapper/gradle-wrapper.properties
### Gradle Patch ###
**/build/
# Eclipse Gradle plugin generated files
# Eclipse Core
.project
# JDT-specific (Eclipse Java Development Tools)
.classpath
# End of https://www.toptal.com/developers/gitignore/api/gradle,java
arguments=
auto.sync=false
build.scans.enabled=false
connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
connection.project.dir=
eclipse.preferences.version=1
gradle.user.home=
java.home=/usr/lib/jvm/java-11-openjdk-amd64
jvm.arguments=
offline.mode=false
override.workspace.settings=true
show.console.view=true
show.executions.view=true
connection.project.dir=..
eclipse.preferences.version=1
/*
* This file was generated by the Gradle 'init' task.
*
* This generated file contains a sample Java application project to get you started.
* For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
* User Manual available at https://docs.gradle.org/7.0/userguide/building_java_projects.html
*/
plugins {
// Apply the application plugin to add support for building a CLI application in Java.
id 'application'
}
repositories {
// Use Maven Central for resolving dependencies.
mavenCentral()
}
dependencies {
// Use JUnit Jupiter API for testing.
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.1'
// Use JUnit Jupiter Engine for testing.
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
// This dependency is used by the application.
implementation 'com.google.guava:guava:30.0-jre'
}
application {
// Define the main class for the application.
mainClass = 'io.ds.date.client.DateClient'
}
tasks.named('test') {
// Use junit platform for unit tests.
useJUnitPlatform()
}
package io.ds.date.client;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
public class DateClient {
private static final int SERVER_PORT = 6789;
/*
* Program parameter
* args[0]: date format style
* args[1]: hostname of server
*/
public static void main(String[] args) {
String style = "SHORT"; // Default style
String serverName = "localhost"; // Default hostname
switch (args.length) {
case 1:
style = args[0].toUpperCase();
break;
case 2:
style = args[0];
serverName = args[1];
break;
default:
}
// Validate Style Input
if (!style.equals("FULL") && !style.equals("MEDIUM") && !style.equals("SHORT")) {
System.err.println("Style not valid!");
System.exit(1);
}
// Validate hostname
InetAddress aHost = null;
try {
aHost=InetAddress.getByName(serverName);
} catch (UnknownHostException e) {
System.err.println("Client: cannot resolve hostname!");
e.printStackTrace();
System.exit(1);
}
try (DatagramSocket aSocket = new DatagramSocket()) {
//Send request
byte[] m = style.getBytes();
DatagramPacket request = new DatagramPacket(m, m.length, aHost, SERVER_PORT);
aSocket.send(request);
//Receive reply
byte[] buffer = new byte[1000];
DatagramPacket reply = new DatagramPacket(buffer, buffer.length);
aSocket.setSoTimeout(2000);
aSocket.receive(reply);
//Output result to STDIN
System.out.println(new String(reply.getData()));
} catch (SocketException e) {
System.err.println("Client: can't open socket.");
} catch (IOException e) {
System.err.println("Client: received timeout for socket!");
e.printStackTrace();
}
}
}
File added
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
#!/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 "$JAVACMD" "$@"
@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 execute
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 execute
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
: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 %*
: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
/*
* This file was generated by the Gradle 'init' task.
*
* The settings file is used to specify which projects to include in your build.
*
* Detailed information about configuring a multi-project build in Gradle can be found
* in the user manual at https://docs.gradle.org/7.0/userguide/multi_project_builds.html
*/
rootProject.name = 'client'
include('app')
#
# https://help.github.com/articles/dealing-with-line-endings/
#
# These are explicitly windows files and should use crlf
*.bat text eol=crlf
# Created by https://www.toptal.com/developers/gitignore/api/gradle,java
# Edit at https://www.toptal.com/developers/gitignore?templates=gradle,java
### Java ###
# Compiled class file
*.class
# Log file
*.log
# BlueJ files
*.ctxt
# Mobile Tools for Java (J2ME)
.mtj.tmp/
# Package Files #
*.jar
*.war
*.nar
*.ear
*.zip
*.tar.gz
*.rar
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
### Gradle ###
.gradle
build/
# Ignore Gradle GUI config
gradle-app.setting
# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
!gradle-wrapper.jar
# Cache of project
.gradletasknamecache
# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
# gradle/wrapper/gradle-wrapper.properties
### Gradle Patch ###
**/build/
# Eclipse Gradle plugin generated files
# Eclipse Core
.project
# JDT-specific (Eclipse Java Development Tools)
.classpath
# End of https://www.toptal.com/developers/gitignore/api/gradle,java
arguments=
auto.sync=false
build.scans.enabled=false
connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
connection.project.dir=
eclipse.preferences.version=1
gradle.user.home=
java.home=/usr/lib/jvm/java-11-openjdk-amd64
jvm.arguments=
offline.mode=false
override.workspace.settings=true
show.console.view=true
show.executions.view=true
connection.project.dir=..
eclipse.preferences.version=1
/*
* This file was generated by the Gradle 'init' task.
*
* This generated file contains a sample Java application project to get you started.
* For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
* User Manual available at https://docs.gradle.org/7.0/userguide/building_java_projects.html
*/
plugins {
// Apply the application plugin to add support for building a CLI application in Java.
id 'application'
}
repositories {
// Use Maven Central for resolving dependencies.
mavenCentral()
}
dependencies {
// Use JUnit Jupiter API for testing.
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.1'
// Use JUnit Jupiter Engine for testing.
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
// This dependency is used by the application.
implementation 'com.google.guava:guava:30.0-jre'
}
application {
// Define the main class for the application.
mainClass = 'io.ds.date.server.DateServer'
}
tasks.named('test') {
// Use junit platform for unit tests.
useJUnitPlatform()
}
package io.ds.date.server;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
import java.text.DateFormat;
import java.util.Arrays;
import java.util.Date;
public class DateServer {
private static final DateFormat FULL_DATE_FORMAT = DateFormat.getDateInstance(DateFormat.FULL);
private static final DateFormat MEDIUM_DATE_FORMAT = DateFormat.getDateInstance(DateFormat.MEDIUM);
private static final DateFormat SHORT_DATE_FORMAT = DateFormat.getDateInstance(DateFormat.SHORT);
public static void main(String[] args) {
byte[] buffer = new byte[1000];
try (DatagramSocket serverSocket = new DatagramSocket(6789)) {
System.out.println("Server listening ...");
while (true) {
// Receive Request
DatagramPacket request = new DatagramPacket(buffer, buffer.length);
serverSocket.receive(request);// blocking!
String style = new String(request.getData()).trim();//trim eliminates the 0 bytes
System.out.println("Received request for style: " + style);
String dateString = getStyledDate(style);
// Send Reply
System.out.println("Send reply!");
byte[] dateBytes = dateString.getBytes();
DatagramPacket reply = new DatagramPacket(dateBytes,
dateBytes.length,
request.getAddress(),
request.getPort());
serverSocket.send(reply);
// Init buffer for reuse
Arrays.fill(buffer, (byte) 0);
}
} catch (SocketException e) {
System.err.println("Server: Can't open socket! Port in use?");
} catch (IOException e) {
System.err.println("Server: Can't read from or write to socket!");
} catch (IllegalStyleException e) {
System.err.println("Server: Illegal style, ignoring client request");
}
}
private static String getStyledDate(String style) throws IllegalStyleException {
switch (style) {
case "FULL":
return FULL_DATE_FORMAT.format(new Date());
case "MEDIUM":
return MEDIUM_DATE_FORMAT.format(new Date());
case "SHORT":
return SHORT_DATE_FORMAT.format(new Date());
default:
throw new IllegalStyleException();
}
}
}
package io.ds.date.server;
public class IllegalStyleException extends Exception {
public IllegalStyleException() {
}
public IllegalStyleException(String message) {
super(message);
}
public IllegalStyleException(Throwable cause) {
super(cause);
}
public IllegalStyleException(String message, Throwable cause) {
super(message, cause);
}
public IllegalStyleException(String message, Throwable cause, boolean enableSuppression,
boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}
File added
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
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