commit f42b2b7a8bbd6a5160e8dfa21a2aff8ca6d55385 Author: pauly-andreas Date: Mon Jun 16 14:44:01 2025 +0200 example repo diff --git a/build.gradle b/build.gradle new file mode 100644 index 0000000..dd0e2c0 --- /dev/null +++ b/build.gradle @@ -0,0 +1,25 @@ +apply plugin: 'java' +apply plugin: 'idea' +apply plugin: 'application' + + +repositories { + mavenCentral() + mavenLocal() + maven { + url "https://repo.akka.io/maven" + } +} + +dependencies { + implementation 'com.typesafe.akka:akka-actor-typed_2.13:2.9.2' + implementation 'ch.qos.logback:logback-classic:1.2.3' + testImplementation 'com.typesafe.akka:akka-actor-testkit-typed_2.13:2.9.2' + testImplementation 'junit:junit:4.13.1' +} + +mainClassName = "com.example.AkkaStart" + +run { + standardInput = System.in +} diff --git a/build/classes/java/main/com/example/Add$AddResult.class b/build/classes/java/main/com/example/Add$AddResult.class new file mode 100644 index 0000000..7115f6e Binary files /dev/null and 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+ +
+ Loading... +
+ + + + + + diff --git a/build/resources/main/logback.xml b/build/resources/main/logback.xml new file mode 100644 index 0000000..203596d --- /dev/null +++ b/build/resources/main/logback.xml @@ -0,0 +1,21 @@ + + + + + + [%date{ISO8601}] [%level] [%logger] [%thread] [%X{akkaSource}] - %msg%n + + + + + 1024 + true + + + + + + + + diff --git a/build/tmp/compileJava/compileTransaction/stash-dir/Add$AddResult.class.uniqueId4 b/build/tmp/compileJava/compileTransaction/stash-dir/Add$AddResult.class.uniqueId4 new file mode 100644 index 0000000..7115f6e Binary files /dev/null and b/build/tmp/compileJava/compileTransaction/stash-dir/Add$AddResult.class.uniqueId4 differ diff --git a/build/tmp/compileJava/compileTransaction/stash-dir/Add$Addition.class.uniqueId15 b/build/tmp/compileJava/compileTransaction/stash-dir/Add$Addition.class.uniqueId15 new file mode 100644 index 0000000..a48f149 Binary files /dev/null and b/build/tmp/compileJava/compileTransaction/stash-dir/Add$Addition.class.uniqueId15 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+zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/gradlew b/gradlew new file mode 100755 index 0000000..faf9300 --- /dev/null +++ b/gradlew @@ -0,0 +1,251 @@ +#!/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. +# +# SPDX-License-Identifier: Apache-2.0 +# + +############################################################################## +# +# 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/platforms/jvm/plugins-application/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##*/} +# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036) +APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || 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: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + if ! command -v java >/dev/null 2>&1 + then + die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + ulimit -n "$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 optsEnvironmentVar are not allowed to contain shell fragments, +# and any embedded shellness will be escaped. +# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be +# treated as '${Hostname}' itself on the command line. + +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 "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 0000000..9b42019 --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,94 @@ +@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 +@rem SPDX-License-Identifier: Apache-2.0 +@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. 1>&2 +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2 +echo. 1>&2 +echo Please set the JAVA_HOME variable in your environment to match the 1>&2 +echo location of your Java installation. 1>&2 + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. 1>&2 +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2 +echo. 1>&2 +echo Please set the JAVA_HOME variable in your environment to match the 1>&2 +echo location of your Java installation. 1>&2 + +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 diff --git a/src/main/java/com/example/Add.java b/src/main/java/com/example/Add.java new file mode 100644 index 0000000..5396c99 --- /dev/null +++ b/src/main/java/com/example/Add.java @@ -0,0 +1,112 @@ +package com.example; + +import akka.actor.typed.javadsl.TimerScheduler; +import akka.actor.typed.ActorRef; +import akka.actor.typed.Behavior; +import akka.actor.typed.javadsl.AbstractBehavior; +import akka.actor.typed.javadsl.ActorContext; +import akka.actor.typed.javadsl.Behaviors; +import akka.actor.typed.javadsl.Receive; + +import java.time.Duration; + +import java.util.Arrays; +import java.util.List; + +public class Add extends AbstractBehavior { + public interface Addition {}; + + public record EvalAndWait(String left, String right) implements Addition {} + public record EvalAndCheck(String left, String right) implements Addition {} + public record Result(int result, String side) implements Addition {} + public record AddResult() implements Addition {} + public record PrintResult() implements Addition {} + public record WaitForResult() implements Addition {} + public record SetResults(int result, String side) implements Addition {} + + + public static Behavior create(){ + return Behaviors.setup(context -> Behaviors.withTimers(timers -> new Add(context, timers)) ); + } + + public int result; + public List results; + private final TimerScheduler timers; + + private Add(ActorContext context, TimerScheduler timers){ + super(context); + this.timers = timers; + this.result = 0; + this.results = Arrays.asList(null, null); + } + + @Override + public Receive createReceive() { + return newReceiveBuilder() + .onMessage(EvalAndWait.class, this::onEvalAndWait) + .onMessage(EvalAndCheck.class, this::onEvalAndCheck) + .onMessage(Result.class, this::onResult) + .onMessage(PrintResult.class, this::onPrintResult) + .onMessage(WaitForResult.class, this::onWaitForResult) + .onMessage(SetResults.class, this::onSetResults) + .onMessage(AddResult.class, this::onAddResult) + .build(); + } + + private Behavior onEvalAndWait(EvalAndWait msg){ + ActorRef left = getContext().spawnAnonymous(Val.create("left")); + ActorRef right = getContext().spawnAnonymous(Val.create("right")); + left.tell(new Val.Eval(msg.left)); + right.tell(new Val.Eval(msg.right)); + left.tell(new Val.Result(getContext().getSelf())); + right.tell(new Val.Result(getContext().getSelf())); + getContext().getSelf().tell(new WaitForResult()); + return this; + } + private Behavior onResult(Result msg){ + this.result += msg.result; + getContext().getLog().info("Calculating: {}", this.result); + return this; + } + + private Behavior onPrintResult(PrintResult msg){ + getContext().getLog().info("Result: {}", this.result); + return this; + } + + private Behavior onWaitForResult(WaitForResult msg){ + this.timers.startSingleTimer(new PrintResult(), Duration.ofSeconds(1)); + return this; + } + + private Behavior onEvalAndCheck(EvalAndCheck msg){ + ActorRef left = getContext().spawnAnonymous(Val.create("left")); + ActorRef right = getContext().spawnAnonymous(Val.create("right")); + left.tell(new Val.Eval(msg.left)); + right.tell(new Val.Eval(msg.right)); + left.tell(new Val.SetResults(getContext().getSelf())); + right.tell(new Val.SetResults(getContext().getSelf())); + getContext().getSelf().tell(new AddResult()); + return this; + } + + private Behavior onSetResults(SetResults msg){ + if (msg.side == "left" && this.results.get(0) == null){ + this.results.set(0, msg.result); + } else if (msg.side == "right" && this.results.get(1) == null) { + this.results.set(1, msg.result); + } + return this; + } + + private Behavior onAddResult(AddResult msg){ + if (this.results.get(0) == null || this.results.get(1) == null){ + getContext().getSelf().tell(new AddResult()); + return this; + } + int sum = this.results.stream().mapToInt(i -> i).sum(); + this.result = sum; + getContext().getSelf().tell(new PrintResult()); + return this; + } +} diff --git a/src/main/java/com/example/AkkaMainSystem.java b/src/main/java/com/example/AkkaMainSystem.java new file mode 100644 index 0000000..48f586b --- /dev/null +++ b/src/main/java/com/example/AkkaMainSystem.java @@ -0,0 +1,34 @@ +package com.example; + +import akka.actor.typed.ActorRef; +import akka.actor.typed.Behavior; +import akka.actor.typed.javadsl.*; + +public class AkkaMainSystem extends AbstractBehavior { + + public static class Create { + } + + public static Behavior create() { + return Behaviors.setup(AkkaMainSystem::new); + } + + private AkkaMainSystem(ActorContext context) { + super(context); + } + + @Override + public Receive createReceive() { + return newReceiveBuilder().onMessage(Create.class, this::onCreate).build(); + } + + private Behavior onCreate(Create command) { + var addition = this.getContext().spawn(Add.create(), "Addition"); + addition.tell(new Add.EvalAndWait("3", "5")); + + var addition_check = this.getContext().spawn(Add.create(), "AdditionCheck"); + addition_check.tell(new Add.EvalAndCheck("4", "6")); + + return this; + } +} \ No newline at end of file diff --git a/src/main/java/com/example/AkkaStart.java b/src/main/java/com/example/AkkaStart.java new file mode 100644 index 0000000..45339c2 --- /dev/null +++ b/src/main/java/com/example/AkkaStart.java @@ -0,0 +1,20 @@ +package com.example; + +import akka.actor.typed.ActorSystem; + +import java.io.IOException; +public class AkkaStart { + public static void main(String[] args) { + final ActorSystem messageMain = ActorSystem.create(AkkaMainSystem.create(), "akkaMainSystem"); + + messageMain.tell(new AkkaMainSystem.Create()); + + try { + System.out.println(">>> Press ENTER to exit <<<"); + System.in.read(); + } catch (IOException ignored) { + } finally { + messageMain.terminate(); + } + } +} diff --git a/src/main/java/com/example/Val.java b/src/main/java/com/example/Val.java new file mode 100644 index 0000000..55aae35 --- /dev/null +++ b/src/main/java/com/example/Val.java @@ -0,0 +1,57 @@ +package com.example; + +import akka.actor.typed.ActorRef; +import akka.actor.typed.Behavior; +import akka.actor.typed.javadsl.AbstractBehavior; +import akka.actor.typed.javadsl.ActorContext; +import akka.actor.typed.javadsl.Behaviors; +import akka.actor.typed.javadsl.Receive; + +public class Val extends AbstractBehavior { + public interface Value {}; + + public record Eval(String expr) implements Value {} + public record Result(ActorRef replyTo) implements Value{} + public record SetResults(ActorRef replyTo) implements Value{} + + + public static Behavior create (String termSide){ + return Behaviors.setup(context -> new Val(context, termSide)); + } + public int result; + public final String termside; + + private Val(ActorContext context, String termSide){ + super(context); + this.termside = termSide; + } + + public Receive createReceive(){ + return newReceiveBuilder() + .onMessage(Eval.class, this::onEval) + .onMessage(Result.class, this::onResult) + .onMessage(SetResults.class, this::onSetResults) + .build(); + } + + private Behavior onEval(Eval msg){ + this.result = Integer.parseInt(msg.expr); + getContext().getLog().info("Val: {}", this.result); + return this; + } + + private Behavior onResult(Result msg){ + int result = this.result; + String side = this.termside; + msg.replyTo.tell(new Add.Result(result, side)); + return this; + } + + private Behavior onSetResults(SetResults msg){ + int result = this.result; + String side = this.termside; + msg.replyTo.tell(new Add.SetResults(result, side)); + return this; + } + +} diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml new file mode 100644 index 0000000..203596d --- /dev/null +++ b/src/main/resources/logback.xml @@ -0,0 +1,21 @@ + + + + + + [%date{ISO8601}] [%level] [%logger] [%thread] [%X{akkaSource}] - %msg%n + + + + + 1024 + true + + + + + + + +