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Mark Nellemann 2023-06-20 09:34:33 +02:00
commit f5948162f2
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9
.gitattributes vendored Normal file
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#
# https://help.github.com/articles/dealing-with-line-endings/
#
# Linux start script should use lf
/gradlew text eol=lf
# These are Windows script files and should use crlf
*.bat text eol=crlf

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# Ignore Gradle project-specific cache directory
.gradle
.vscode
# Ignore Gradle build output directory
build
bin

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build.gradle Normal file
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/*
* 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/8.1.1/userguide/building_java_projects.html
*/
plugins {
// Apply the groovy plugin to also add support for Groovy (needed for Spock)
id 'groovy'
// 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 {
testImplementation 'org.codehaus.groovy:groovy:3.0.13'
testImplementation 'org.spockframework:spock-core:2.2-groovy-3.0'
testImplementation 'junit:junit:4.13.2'
implementation 'org.slf4j:slf4j-api:2.0.7'
implementation 'ch.qos.logback:logback-classic:1.3.8'
implementation 'info.picocli:picocli:4.7.4'
annotationProcessor 'info.picocli:picocli-codegen:4.7.4'
}
// Apply a specific Java toolchain to ease working on different environments.
java {
toolchain {
languageVersion = JavaLanguageVersion.of(11)
}
}
application {
// Define the main class for the application.
mainClass = 'biz.nellemann.jperf.App'
}
tasks.named('test') {
// Use JUnit Platform for unit tests.
useJUnitPlatform()
}

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
networkTimeout=10000
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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#!/bin/sh
#
# Copyright © 2015-2021 the original 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 POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
# This is normally unused
# shellcheck disable=SC2034
APP_BASE_NAME=${0##*/}
APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | 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" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC3045
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC3045
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# 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"'
# Collect all arguments for the java command;
# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
# shell script including quotes and variable substitutions, so put them in
# double quotes to make sure that they get re-expanded; and
# * put everything else in single quotes, so that it's not re-expanded.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Stop when "xargs" is not available.
if ! command -v xargs >/dev/null 2>&1
then
die "xargs is not available"
fi
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
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=.
@rem This is normally unused
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% equ 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% equ 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!
set EXIT_CODE=%ERRORLEVEL%
if %EXIT_CODE% equ 0 set EXIT_CODE=1
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
exit /b %EXIT_CODE%
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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/*
* 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/8.1.1/userguide/multi_project_builds.html
*/
plugins {
// Apply the foojay-resolver plugin to allow automatic download of JDKs
id 'org.gradle.toolchains.foojay-resolver-convention' version '0.4.0'
}
rootProject.name = 'jperf'

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src/main/java/biz/nellemann/jperf/App.java Normal file
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/*
* This Java source file was generated by the Gradle 'init' task.
*/
package biz.nellemann.jperf;
import picocli.CommandLine;
import picocli.CommandLine.Command;
import java.util.concurrent.Callable;
@Command(name = "jperf", mixinStandardHelpOptions = true, version = "checksum 4.0",
description = "Java network performance tool.")
public class App implements Callable<Integer> {
@Override
public Integer call() throws Exception { // your business logic goes here...
// Start server
UdpServer udpServer = new UdpServer();
udpServer.start();
int sequence = 0;
// Start client and send some messages
UdpClient udpClient = new UdpClient();
// Start datagram
Datagram datagram = new Datagram(DataType.HANDSHAKE.getValue(), 64, sequence++);
udpClient.send(datagram);
// Data datagrams ...
for(int i = 0; i < 10; i++) {
datagram = new Datagram(DataType.DATA.getValue(), 64, sequence++);
udpClient.send(datagram);
}
// End datagram
datagram = new Datagram(DataType.END.getValue(), 64, sequence++);
udpClient.send(datagram);
udpClient.close();
return 0;
}
// this example implements Callable, so parsing, error handling and handling user
// requests for usage help or version help can be done with one line of code.
public static void main(String... args) {
int exitCode = new CommandLine(new App()).execute(args);
System.exit(exitCode);
}
}

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src/main/java/biz/nellemann/jperf/DataType.java Normal file
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package biz.nellemann.jperf;
public enum DataType {
HANDSHAKE(1), DATA(2), ACK(4), END(9);
private final int value;
private DataType(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}

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src/main/java/biz/nellemann/jperf/Datagram.java Normal file
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package biz.nellemann.jperf;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* A datagram consists of
*
* <-------------------- HEADER 32 bytes --------------> <---------- DATA -------->
* int-4bytes int-4bytes long-8bytes long-8bytes
* TYPE SIZE SEQUENCE TIMESTAMP
*
*/
public class Datagram {
final Logger log = LoggerFactory.getLogger(Datagram.class);
private final int HEADER_LENGTH = 24;
private final int type;
private final int size;
private final long sequence;
private final long timestamp;
private final byte[] data;
/**
* Create new empty datagram
* @param type
* @param size
* @param sequence
*/
public Datagram(int type, int size, long sequence) {
this.type = type;
this.size = size;
this.sequence = sequence;
this.timestamp = System.currentTimeMillis();
this.data = new byte[size];
}
/**
* Assemble datagram from payload
* @param payload
*/
public Datagram(byte[] payload) {
log.info("Datagram() 1");
ByteBuffer buffer = ByteBuffer.allocate(payload.length);
// Order is importent when assembling header fields like this
type = buffer.getInt();
size = buffer.getInt();
sequence = buffer.getLong();
timestamp = buffer.getLong();
log.info("Datagram() 2 ");
// Read everything after Header
data = new byte[size];
log.info("Datagram() 3 ");
buffer.get(data, HEADER_LENGTH, size); // ERROR
log.info("Datagram() 4");
}
public int getLength() {
return HEADER_LENGTH + data.length;
}
public byte[] getPayload() throws IOException {
ByteBuffer buffer = ByteBuffer.allocate(HEADER_LENGTH + data.length + 1);
// Order is important
buffer.putInt(type);
buffer.putInt(size);
buffer.putLong(sequence);
buffer.putLong(timestamp);
buffer.put(data);
return buffer.array();
}
public int getType() {
return type;
}
public long getSequence() {
return sequence;
}
}

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src/main/java/biz/nellemann/jperf/UdpClient.java Normal file
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package biz.nellemann.jperf;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UdpClient {
final Logger log = LoggerFactory.getLogger(UdpClient.class);
private DatagramSocket socket;
private InetAddress address;
private byte[] buf;
public UdpClient() throws UnknownHostException, SocketException {
log.info("UdpClient");
socket = new DatagramSocket();
address = InetAddress.getByName("localhost");
}
public void send(Datagram datagram) throws IOException {
DatagramPacket packet = new DatagramPacket(datagram.getPayload(), datagram.getLength(), address, 4445);
socket.send(packet);
}
public String sendEcho(String msg) throws IOException {
log.info("send() - msg: {}", msg);
buf = msg.getBytes();
DatagramPacket packet = new DatagramPacket(buf, buf.length, address, 4445);
socket.send(packet);
packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
String received = new String( packet.getData(), 0, packet.getLength() );
return received;
}
public void close() {
socket.close();
}
}

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src/main/java/biz/nellemann/jperf/UdpServer.java Normal file
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package biz.nellemann.jperf;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UdpServer extends Thread {
final Logger log = LoggerFactory.getLogger(UdpServer.class);
private DatagramSocket socket;
private boolean running;
private byte[] buf = new byte[256];
public UdpServer() throws SocketException {
log.info("UdpServer()");
socket = new DatagramSocket(4445);
}
public void run() {
running = true;
try {
while (running) {
DatagramPacket packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
InetAddress address = packet.getAddress();
int port = packet.getPort();
Datagram datagram = new Datagram(buf);
if(datagram.getType() == DataType.HANDSHAKE.getValue()) {
log.info("Handshake from ...");
}
if(datagram.getType() == DataType.END.getValue()) {
running = false;
log.info("Stopping ....");
}
if(datagram.getType() == DataType.DATA.getValue()) {
log.info("Data .... size: {}", datagram.getLength());
}
// Send response ACK
Datagram responseDatagram = new Datagram(DataType.ACK.getValue(), 32, datagram.getSequence());
packet = new DatagramPacket(responseDatagram.getPayload(), responseDatagram.getLength(), address, port);
socket.send(packet);
}
socket.close();
} catch(IOException e) {
}
}
private void ack() {
}
private void receive(String msg) {
log.info("receive() - msg: {}", msg);
}
}

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src/test/groovy/biz/nellemann/jperf/AppTest.groovy Normal file
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/*
* This Spock specification was generated by the Gradle 'init' task.
*/
package biz.nellemann.jperf
import spock.lang.Specification
class AppTest extends Specification {
}