diff --git a/.current.json b/.current.json
index c0f15d3..cc0429f 100644
--- a/.current.json
+++ b/.current.json
@@ -1 +1 @@
-{"assignment":"java-advanced-ru/sync-primitives"}
+{"assignment":"java-advanced-ru/asynchrony"}
diff --git a/java-advanced-ru/asynchrony/.gitignore b/java-advanced-ru/asynchrony/.gitignore
new file mode 100644
index 0000000..67bcc2f
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.gitignore
@@ -0,0 +1,2 @@
+.gradle/
+build/
diff --git a/java-advanced-ru/asynchrony/.idea/.gitignore b/java-advanced-ru/asynchrony/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/java-advanced-ru/asynchrony/.idea/compiler.xml b/java-advanced-ru/asynchrony/.idea/compiler.xml
new file mode 100644
index 0000000..b86273d
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/compiler.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/.idea/gradle.xml b/java-advanced-ru/asynchrony/.idea/gradle.xml
new file mode 100644
index 0000000..f9163b4
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/gradle.xml
@@ -0,0 +1,15 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/.idea/jarRepositories.xml b/java-advanced-ru/asynchrony/.idea/jarRepositories.xml
new file mode 100644
index 0000000..fdc392f
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/jarRepositories.xml
@@ -0,0 +1,20 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/.idea/misc.xml b/java-advanced-ru/asynchrony/.idea/misc.xml
new file mode 100644
index 0000000..94c67d7
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/misc.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/.idea/vcs.xml b/java-advanced-ru/asynchrony/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/java-advanced-ru/asynchrony/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/Makefile b/java-advanced-ru/asynchrony/Makefile
new file mode 100644
index 0000000..757b502
--- /dev/null
+++ b/java-advanced-ru/asynchrony/Makefile
@@ -0,0 +1,5 @@
+test:
+ gradle test
+
+run:
+ gradle run
diff --git a/java-advanced-ru/asynchrony/README.html b/java-advanced-ru/asynchrony/README.html
new file mode 100644
index 0000000..3574915
--- /dev/null
+++ b/java-advanced-ru/asynchrony/README.html
@@ -0,0 +1,69 @@
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/java-advanced-ru/asynchrony/README.md b/java-advanced-ru/asynchrony/README.md
new file mode 100644
index 0000000..23cb525
--- /dev/null
+++ b/java-advanced-ru/asynchrony/README.md
@@ -0,0 +1,40 @@
+# Асинхронность
+
+Асинхронность в программировании — выполнение процесса в неблокирующем режиме, что позволяет основному потоку программы продолжить обработку.
+
+## Ссылки
+
+* [Класс CompletableFuture – представляет собой отложенный результат асинхронных вычислений](https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/CompletableFuture.html)
+* [Класс Files – содержит статические методы для работы с файлами и директориями](https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/nio/file/Files.html)
+
+## src/main/java/exercise/App.java
+
+## Задачи
+
+* Создайте асинхронный публичный статический метод `unionFiles()`. Метод должен асинхронно читать содержимое двух файлов, объединять эту информацию и записывать её в третий файл. Метод принимает три аргумента – пути до файлов в виде строки. Первые два аргумента – пути до файлов-источников, третий – путь до итогового файла. Метод может принимать абсолютный и относительный путь до файлов. Если хотя-бы один из файлов-источников не существует, на экран должно выводиться сообщение о возникшем исключении. Если итоговый файл не существует, он должен быть создан. Метод должен возвращать `CompletableFuture`.
+
+ ```java
+ CompletableFuture result = App.unionFiles("file1.txt", "file2.txt", "dest.txt");
+ ```
+
+ Конечно, чтение файлов можно выполнить и синхронно. Но представьте, что у нас сложные задачи, которые выполняются длительное время, например конвертация видеофайла. В этом случае, асинхронный, неблокирующий запуск задач позволит нам получить выигрыш.
+
+* В методе `main()`, используя асинхронный метод `unionFiles()`, прочитайте информацию из двух файлов *src/main/resources/file1.txt* и *src/main/resources/file2.txt* и запишите её в третий файл в этой же директории. Имя файла выберите на своё усмотрение.
+
+* Запустите программу при помощи команды `make run`. Убедитесь, что целевой файл создался и он содержит информацию из двух источников.
+
+### Самостоятельная работа
+
+* В классе `App` создайте асинхронный публичный статический метод `getDirectorySize()`, который считает размеры переданной директории не включая поддиректории. Размер директории складывается из размера всех файлов в директории. Метод должен вернуть `CompletableFuture`.
+
+ ```java
+ CompletableFuture size = App.getDirectorySize("dir/subdir");
+ ```
+
+* Напишите тесты, проверяющие работу этого метода.
+
+### Подсказки
+
+* Для обработки возникших в асинхронном коде исключений можно использовать метод [exceptionally()](https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/CompletableFuture.html#exceptionally(java.util.function.Function))
+
+* Для того, чтобы независимо друг от друга выполнить две задачи, и затем сделать что-то после их выполнения, можно использовать метод [thenCombine()](https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/CompletableFuture.html#thenCombine(java.util.concurrent.CompletionStage,java.util.function.BiFunction))
diff --git a/java-advanced-ru/asynchrony/build.gradle b/java-advanced-ru/asynchrony/build.gradle
new file mode 100644
index 0000000..c2a3050
--- /dev/null
+++ b/java-advanced-ru/asynchrony/build.gradle
@@ -0,0 +1,31 @@
+plugins {
+ id 'application'
+ id 'com.adarshr.test-logger' version '2.1.1'
+}
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.0-M1'
+ testImplementation 'org.junit.jupiter:junit-jupiter-params:5.8.0-M1'
+ testImplementation 'org.assertj:assertj-core:3.19.0'
+ testImplementation 'com.github.stefanbirkner:system-lambda:1.2.0'
+}
+
+application {
+ mainClass = 'exercise.App'
+}
+
+test {
+ useJUnitPlatform()
+}
+
+testlogger {
+ showStandardStreams = true
+}
+
+tasks.withType(JavaCompile) {
+ options.encoding = "UTF-8"
+}
diff --git a/java-advanced-ru/asynchrony/examples/Example.java b/java-advanced-ru/asynchrony/examples/Example.java
new file mode 100644
index 0000000..fbb0942
--- /dev/null
+++ b/java-advanced-ru/asynchrony/examples/Example.java
@@ -0,0 +1,80 @@
+class Example {
+ public static void main(String[] args) {
+
+ // Если нам нужно просто асинхронно выполнить задачу и не нужно ничего возвращать
+
+ // В виде лямбды передаём объект Runnable
+ CompletableFuture future1 = CompletableFuture.runAsync(() -> {
+ // Задержка имитирует длительно выполняющуюся задачу
+ try {
+ TimeUnit.SECONDS.sleep(1);
+ } catch (InterruptedException e) {
+ throw new IllegalStateException(e);
+ }
+ System.out.println("Run in separate thread");
+ });
+
+ // Ожидаем окончания работы задачи
+ future1.get();
+
+
+ // Асинхронный запуск задачи и возврат результата работы
+
+ CompletableFuture future2 = CompletableFuture.supplyAsync(() -> {
+ // Задержка имитирует длительно выполняющуюся задачу
+ try {
+ TimeUnit.SECONDS.sleep(1);
+ } catch (InterruptedException e) {
+ throw new IllegalStateException(e);
+ }
+ return "Result of async computation";
+ });
+
+ // Ожидаем окончания работы задачи и получаем результат
+ String result = future2.get(); // "Result of async computation"
+
+ // Комбинирование двух CompletableFuture
+
+ // Если одна задача не зависит от другой
+ // Нужно выполнить две задачи независимо одна от другой и выполнить третью,
+ // когда предыдущее будут завершены
+
+
+ // Задачи выполняются независимо друг от друга
+ System.out.println("Retrieving weight");
+ CompletableFuture futureWeight = CompletableFuture.supplyAsync(() -> {
+
+ try {
+ TimeUnit.SECONDS.sleep(1);
+ } catch (Exception e) {
+ throw new IllegalStateException(e);
+ }
+ return 100;
+ });
+
+ System.out.println("Retrieving volume");
+ CompletableFuture futureVolume = CompletableFuture.supplyAsync(() -> {
+
+ try {
+ TimeUnit.SECONDS.sleep(1);
+ } catch (Exception e) {
+ throw new IllegalStateException(e);
+ }
+ return 2;
+ });
+
+ // выполняется после завершения первых двух
+ System.out.println("Calculate density");
+ CompletableFuture futureDensity = futureWeight.thenCombine(futureVolume, (weight, volume) -> {
+ Integer density = weight / volume;
+ return density;
+
+ // Обработка исключений
+ // Если при работе задач возникли исключения
+ // их можно обработать в методе exceptionally
+ }).exceptionally(ex -> {
+ System.out.println("Oops! We have an exception - " + ex.getMessage());
+ return null;
+ });
+ }
+}
diff --git a/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.jar b/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..d64cd49
Binary files /dev/null and b/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.properties b/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..1af9e09
--- /dev/null
+++ b/java-advanced-ru/asynchrony/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/java-advanced-ru/asynchrony/gradlew b/java-advanced-ru/asynchrony/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/java-advanced-ru/asynchrony/gradlew
@@ -0,0 +1,249 @@
+#!/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##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ if ! command -v java >/dev/null 2>&1
+ then
+ die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$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, 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/java-advanced-ru/asynchrony/gradlew.bat b/java-advanced-ru/asynchrony/gradlew.bat
new file mode 100644
index 0000000..6689b85
--- /dev/null
+++ b/java-advanced-ru/asynchrony/gradlew.bat
@@ -0,0 +1,92 @@
+@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
diff --git a/java-advanced-ru/asynchrony/presentation.pdf b/java-advanced-ru/asynchrony/presentation.pdf
new file mode 100644
index 0000000..094cc75
Binary files /dev/null and b/java-advanced-ru/asynchrony/presentation.pdf differ
diff --git a/java-advanced-ru/asynchrony/settings.gradle b/java-advanced-ru/asynchrony/settings.gradle
new file mode 100644
index 0000000..86ad5a8
--- /dev/null
+++ b/java-advanced-ru/asynchrony/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'asynchrony'
diff --git a/java-advanced-ru/asynchrony/src/main/java/exercise/App.java b/java-advanced-ru/asynchrony/src/main/java/exercise/App.java
new file mode 100644
index 0000000..5384681
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/main/java/exercise/App.java
@@ -0,0 +1,83 @@
+package exercise;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.Arrays;
+import java.nio.file.Paths;
+import java.nio.file.Path;
+import java.nio.file.Files;
+import java.io.File;
+import java.nio.file.StandardOpenOption;
+
+class App {
+
+ // BEGIN
+ public static CompletableFuture unionFiles(String file1, String file2, String outputFile) {
+ CompletableFuture future1 = CompletableFuture.supplyAsync(() -> {
+ Path filePath = Paths.get(file1).toAbsolutePath();
+ try {
+ return Files.readString(filePath);
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ });
+
+ CompletableFuture future2 = CompletableFuture.supplyAsync(() -> {
+ Path filePath = Paths.get(file2).toAbsolutePath();
+ try {
+ return Files.readString(filePath);
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ });
+
+ return future1.thenCombine(future2, (text1, text2) -> {
+ Path filePath = Paths.get(outputFile).toAbsolutePath();
+ try {
+ Files.writeString(filePath, text1 + text2, StandardOpenOption.CREATE);
+ return text1 + " " + text2;
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ }).exceptionally(ex -> {
+ System.out.println(ex.getMessage());
+ return null;
+ });
+ }
+
+ public static CompletableFuture getDirectorySize(String path) {
+ var directory = new File(path);
+ if (!directory.isDirectory()) {
+ return CompletableFuture.completedFuture(0L);
+ }
+
+ File[] files = directory.listFiles();
+ if (files == null) {
+ return CompletableFuture.completedFuture(0L);
+ }
+
+ CompletableFuture[] fileSizes = Arrays.stream(files)
+ .filter(File::isFile)
+ .map(file -> CompletableFuture.supplyAsync(file::length))
+ .toArray(CompletableFuture[]::new);
+
+ return CompletableFuture.allOf(fileSizes)
+ .thenApply(v -> Arrays.stream(fileSizes)
+ .mapToLong(CompletableFuture::join)
+ .sum());
+ }
+ // END
+
+ public static void main(String[] args) throws Exception {
+ // BEGIN
+ String resultText = unionFiles(
+ "src/main/resources/file1.txt",
+ "src/main/resources/file2.txt",
+ "src/main/resources/result.txt"
+ ).get();
+ CompletableFuture size = getDirectorySize("src/main/resources");
+ System.out.println(resultText);
+ System.out.println(size.get());
+ // END
+ }
+}
+
diff --git a/java-advanced-ru/asynchrony/src/main/resources/file1.txt b/java-advanced-ru/asynchrony/src/main/resources/file1.txt
new file mode 100644
index 0000000..e965047
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/main/resources/file1.txt
@@ -0,0 +1 @@
+Hello
diff --git a/java-advanced-ru/asynchrony/src/main/resources/file2.txt b/java-advanced-ru/asynchrony/src/main/resources/file2.txt
new file mode 100644
index 0000000..216e97c
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/main/resources/file2.txt
@@ -0,0 +1 @@
+World
diff --git a/java-advanced-ru/asynchrony/src/test/java/exercise/AppTest.java b/java-advanced-ru/asynchrony/src/test/java/exercise/AppTest.java
new file mode 100644
index 0000000..94a1f90
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/java/exercise/AppTest.java
@@ -0,0 +1,51 @@
+package exercise;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.assertj.core.api.Assertions.assertThat;
+import static com.github.stefanbirkner.systemlambda.SystemLambda.tapSystemOut;
+import java.util.concurrent.CompletableFuture;
+
+import java.nio.file.Paths;
+import java.nio.file.Path;
+import java.nio.file.Files;
+
+class AppTest {
+ private String destPath;
+
+ private static Path getFullPath(String filePath) {
+ return Paths.get(filePath).toAbsolutePath().normalize();
+ }
+
+ @BeforeEach
+ void beforeEach() throws Exception {
+ destPath = Files.createTempFile("test", "tmp").toString();
+ }
+
+ @Test
+ void testUnion() throws Exception {
+ CompletableFuture result = App.unionFiles(
+ "src/test/resources/file1.txt",
+ "src/test/resources/file2.txt",
+ destPath
+ );
+ result.get();
+
+ String actual = Files.readString(getFullPath(destPath));
+ assertThat(actual).contains("Test", "Message");
+ }
+
+ @Test
+ void testUnionWithNonExistedFile() throws Exception {
+
+ String result = tapSystemOut(() -> {
+ App.unionFiles("nonExistingFile", "file", destPath).get();
+ });
+
+ assertThat(result.trim()).contains("NoSuchFileException");
+ }
+
+ // BEGIN
+
+ // END
+}
diff --git a/java-advanced-ru/asynchrony/src/test/resources/dir/anotherFile b/java-advanced-ru/asynchrony/src/test/resources/dir/anotherFile
new file mode 100644
index 0000000..e965047
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/dir/anotherFile
@@ -0,0 +1 @@
+Hello
diff --git a/java-advanced-ru/asynchrony/src/test/resources/dir/firstFille b/java-advanced-ru/asynchrony/src/test/resources/dir/firstFille
new file mode 100644
index 0000000..216e97c
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/dir/firstFille
@@ -0,0 +1 @@
+World
diff --git a/java-advanced-ru/asynchrony/src/test/resources/dir/nested/file b/java-advanced-ru/asynchrony/src/test/resources/dir/nested/file
new file mode 100644
index 0000000..55c1adf
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/dir/nested/file
@@ -0,0 +1,5 @@
+ddddddddd
+dddddddddd
+ddddddddd
+ddddddddd
+ddddddddd
diff --git a/java-advanced-ru/asynchrony/src/test/resources/dir/secondFile b/java-advanced-ru/asynchrony/src/test/resources/dir/secondFile
new file mode 100644
index 0000000..ba23e4f
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/dir/secondFile
@@ -0,0 +1,3 @@
+Hello World
+
+
diff --git a/java-advanced-ru/asynchrony/src/test/resources/empty_dir/.gitkeep b/java-advanced-ru/asynchrony/src/test/resources/empty_dir/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/java-advanced-ru/asynchrony/src/test/resources/file1.txt b/java-advanced-ru/asynchrony/src/test/resources/file1.txt
new file mode 100644
index 0000000..345e6ae
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/file1.txt
@@ -0,0 +1 @@
+Test
diff --git a/java-advanced-ru/asynchrony/src/test/resources/file2.txt b/java-advanced-ru/asynchrony/src/test/resources/file2.txt
new file mode 100644
index 0000000..a5e66f9
--- /dev/null
+++ b/java-advanced-ru/asynchrony/src/test/resources/file2.txt
@@ -0,0 +1 @@
+Message