Initial commit.

2025-09-18 16:57:59 +02:00
commit 076a224bcc
45 changed files with 1123 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,43 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Kotlin ###
+.kotlin
+
+### Local postgresql database data ###
+/local/postgresql/pgdata
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -0,0 +1,26 @@
+plugins {
+    java
+    id("org.springframework.boot") version "3.2.0" apply false
+    id("io.spring.dependency-management") version "1.1.4" apply false
+}
+
+allprojects {
+    group = "com.zeenea.experiments.virtualthreads"
+    version = "0.0.1-SNAPSHOT"
+
+    tasks.withType<JavaCompile> {
+        options.compilerArgs.add("--release")
+        options.compilerArgs.add("21")
+//        options.compilerArgs.add("--enable-preview")
+    }
+
+    repositories {
+        mavenCentral()
+    }
+
+//    java {
+//        toolchain {
+//            languageVersion = JavaLanguageVersion.of(21)
+//        }
+//    }
+}
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -0,0 +1,18 @@
+services:
+  database:
+    container_name: "virtual-threads-test-db"
+    image: "postgres:17"
+    ports:
+      - "51000:5432"
+    networks:
+      - "virtual-threads-test-network"
+    environment:
+      POSTGRES_DB: virtual_threads_test_db
+      POSTGRES_USER: virtual_threads_test_user
+      POSTGRES_PASSWORD: password
+      PGDATA: /var/lib/postgresql/data/pgdata
+    volumes:
+      - "./local/postgresql/pgdata:/var/lib/postgresql/data/pgdata"
+
+networks:
+  virtual-threads-test-network:
--- a/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/251
+++ b/251
@@ -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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# 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 "$JAVACMD" "$@"
--- a/gradlew.bat
+++ 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=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+: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
--- a/reactor-app/build.gradle.kts
+++ b/reactor-app/build.gradle.kts
@@ -0,0 +1,24 @@
+plugins {
+	id("java")
+	id("org.springframework.boot")
+	id("io.spring.dependency-management")
+}
+
+group = "com.zeenea.experiments.virtualthreads.reactorapp"
+version = "0.0.1-SNAPSHOT"
+
+dependencies {
+	implementation("org.springframework.boot:spring-boot-starter-webflux")
+	developmentOnly("org.springframework.boot:spring-boot-devtools")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+	runtimeOnly("org.postgresql:postgresql")
+	compileOnly("org.projectlombok:lombok")
+	annotationProcessor("org.projectlombok:lombok")
+	testImplementation("org.springframework.boot:spring-boot-starter-test")
+	testImplementation("io.projectreactor:reactor-test")
+	testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+tasks.withType<Test> {
+	useJUnitPlatform()
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/configuration/JpaConfiguration.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/configuration/JpaConfiguration.java
@@ -0,0 +1,10 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.configuration;
+
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+
+@Configuration
+@EnableJpaRepositories("com.zeenea.experiments.virtualthreads.reactorapp.infrastructure")
+@EntityScan("com.zeenea.experiments.virtualthreads.reactorapp.infrastructure")
+public class JpaConfiguration {}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/CatalogService.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/CatalogService.java
@@ -0,0 +1,26 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.port.CatalogPort;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.UUID;
+
+@Service
+public class CatalogService {
+    private final CatalogPort catalogPort;
+
+    public CatalogService(CatalogPort catalogPort) {
+        this.catalogPort = catalogPort;
+    }
+
+    public Mono<Catalog> getById(UUID catalogId) {
+        return catalogPort.getById(catalogId);
+    }
+
+    public Flux<Catalog> getAll() {
+        return catalogPort.getAll();
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/model/Catalog.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/model/Catalog.java
@@ -0,0 +1,5 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model;
+
+import java.util.UUID;
+
+public record Catalog(UUID id, String name) {}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/port/CatalogPort.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/catalog/port/CatalogPort.java
@@ -0,0 +1,12 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.port;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.UUID;
+
+public interface CatalogPort {
+    Mono<Catalog> getById(UUID catalogId);
+    Flux<Catalog> getAll();
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/ItemService.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/ItemService.java
@@ -0,0 +1,19 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.item;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.port.ItemPort;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+@Service
+public class ItemService {
+    private final ItemPort itemPort;
+
+    public ItemService(ItemPort itemPort) {
+        this.itemPort = itemPort;
+    }
+
+    public Flux<Item> getAllItems() {
+        return itemPort.getAll();
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/model/Item.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/model/Item.java
@@ -0,0 +1,14 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model;
+
+import java.time.ZonedDateTime;
+import java.util.UUID;
+
+public record Item(
+        UUID id,
+        String name,
+        ZonedDateTime sharedDate
+) {
+    public boolean isShared() {
+        return sharedDate != null;
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/port/ItemPort.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/item/port/ItemPort.java
@@ -0,0 +1,8 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.item.port;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+import reactor.core.publisher.Flux;
+
+public interface ItemPort {
+    Flux<Item> getAll();
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/marketplace/MarketplaceService.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/marketplace/MarketplaceService.java
@@ -0,0 +1,36 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.marketplace;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.CatalogService;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.ItemService;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.marketplace.model.Marketplace;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+@Service
+public class MarketplaceService {
+    private final CatalogService catalogService;
+    private final ItemService itemService;
+
+    public MarketplaceService(CatalogService catalogService, ItemService itemService) {
+        this.catalogService = catalogService;
+        this.itemService = itemService;
+    }
+
+    public Mono<Marketplace> getMarketplace() {
+        Mono<List<Catalog>> catalogListMono = catalogService.getAll().collectList();
+        Mono<List<Item>> sharedItemListMono = itemService.getAllItems()
+                .filter(Item::isShared)
+                .collectList();
+        return Mono.zip(catalogListMono, sharedItemListMono)
+                .map(tuple -> {
+                    List<Catalog> catalogs = tuple.getT1();
+                    List<Item> items = tuple.getT2();
+                    return new Marketplace(catalogs, items);
+                });
+    }
+
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/marketplace/model/Marketplace.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/domain/marketplace/model/Marketplace.java
@@ -0,0 +1,11 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.domain.marketplace.model;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+
+import java.util.List;
+
+public record Marketplace(
+        List<Catalog> catalogs,
+        List<Item> sharedItems
+) {}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/catalog/CatalogController.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/catalog/CatalogController.java
@@ -0,0 +1,27 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.exposition.catalog;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.CatalogService;
+import com.zeenea.experiments.virtualthreads.reactorapp.exposition.catalog.model.CatalogDto;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/catalogs")
+public class CatalogController {
+    private final CatalogService catalogService;
+
+    public CatalogController(CatalogService catalogService) {
+        this.catalogService = catalogService;
+    }
+
+    @GetMapping("/{catalogId}")
+    public Mono<CatalogDto> getById(@PathVariable("catalogId") UUID catalogId) {
+        return catalogService.getById(catalogId)
+                .map(CatalogDto::new);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/catalog/model/CatalogDto.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/catalog/model/CatalogDto.java
@@ -0,0 +1,14 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.exposition.catalog.model;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+
+import java.util.UUID;
+
+public record CatalogDto(
+        UUID id,
+        String name
+) {
+    public CatalogDto(Catalog catalog) {
+        this(catalog.id(), catalog.name());
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/MarketplaceController.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/MarketplaceController.java
@@ -0,0 +1,24 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.exposition.marketplace;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.marketplace.MarketplaceService;
+import com.zeenea.experiments.virtualthreads.reactorapp.exposition.marketplace.model.MarketplaceDto;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping("/api/marketplace")
+public class MarketplaceController {
+    private final MarketplaceService marketplaceService;
+
+    public MarketplaceController(MarketplaceService marketplaceService) {
+        this.marketplaceService = marketplaceService;
+    }
+
+    @GetMapping
+    public Mono<MarketplaceDto> getMarketplace() {
+        return marketplaceService.getMarketplace()
+                .map(MarketplaceDto::new);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/model/ItemDto.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/model/ItemDto.java
@@ -0,0 +1,15 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.exposition.marketplace.model;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+
+import java.util.UUID;
+
+public record ItemDto(
+        UUID id,
+        String name,
+        Boolean isShared
+) {
+    public ItemDto(Item item) {
+        this(item.id(), item.name(), item.isShared());
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/model/MarketplaceDto.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/exposition/marketplace/model/MarketplaceDto.java
@@ -0,0 +1,15 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.exposition.marketplace.model;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.marketplace.model.Marketplace;
+import com.zeenea.experiments.virtualthreads.reactorapp.exposition.catalog.model.CatalogDto;
+
+import java.util.List;
+
+public record MarketplaceDto(List<CatalogDto> catalogs, List<ItemDto> sharedItems) {
+    public MarketplaceDto(Marketplace marketplace) {
+        this(
+                marketplace.catalogs().stream().map(CatalogDto::new).toList(),
+                marketplace.sharedItems().stream().map(ItemDto::new).toList()
+        );
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/CatalogJpaAdapter.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/CatalogJpaAdapter.java
@@ -0,0 +1,37 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.port.CatalogPort;
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog.model.CatalogJpaEntity;
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog.repository.CatalogJpaRepository;
+import org.springframework.stereotype.Component;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
+
+import java.util.UUID;
+
+@Component
+public class CatalogJpaAdapter implements CatalogPort {
+    private final CatalogJpaRepository catalogJpaRepository;
+
+    public CatalogJpaAdapter(CatalogJpaRepository catalogJpaRepository) {
+        this.catalogJpaRepository = catalogJpaRepository;
+    }
+
+    @Override
+    public Mono<Catalog> getById(UUID catalogId) {
+        return Mono.fromCallable(() -> catalogJpaRepository.findById(catalogId))
+                .subscribeOn(Schedulers.boundedElastic())
+                .flatMap(result -> result.map(Mono::just).orElseGet(Mono::empty))
+                .map(CatalogJpaEntity::toDomain);
+    }
+
+    @Override
+    public Flux<Catalog> getAll() {
+        return Mono.fromCallable(catalogJpaRepository::findAll)
+                .subscribeOn(Schedulers.boundedElastic())
+                .flatMapMany(Flux::fromIterable)
+                .map(CatalogJpaEntity::toDomain);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/model/CatalogJpaEntity.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/model/CatalogJpaEntity.java
@@ -0,0 +1,34 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog.model;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.catalog.model.Catalog;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.util.UUID;
+
+@Entity
+@Table(name = "catalog")
+@NoArgsConstructor
+@AllArgsConstructor
+@Getter
+@Setter
+public class CatalogJpaEntity {
+    @Id
+    private UUID id;
+    @Column(nullable = false)
+    private String name;
+
+    public CatalogJpaEntity(Catalog catalog) {
+        id = catalog.id();
+        name = catalog.name();
+    }
+
+    public Catalog toDomain() {
+        return new Catalog(id, name);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/repository/CatalogJpaRepository.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/catalog/repository/CatalogJpaRepository.java
@@ -0,0 +1,11 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog.repository;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.catalog.model.CatalogJpaEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.UUID;
+
+@Repository
+public interface CatalogJpaRepository extends JpaRepository<CatalogJpaEntity, UUID> {
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/ItemJpaAdapter.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/ItemJpaAdapter.java
@@ -0,0 +1,27 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.port.ItemPort;
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item.model.ItemJpaEntity;
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item.repository.ItemJpaRepository;
+import org.springframework.stereotype.Component;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
+
+@Component
+public class ItemJpaAdapter implements ItemPort {
+    private final ItemJpaRepository itemJpaRepository;
+
+    public ItemJpaAdapter(ItemJpaRepository itemJpaRepository) {
+        this.itemJpaRepository = itemJpaRepository;
+    }
+
+    @Override
+    public Flux<Item> getAll() {
+        return Mono.fromCallable(itemJpaRepository::findAll)
+                .subscribeOn(Schedulers.boundedElastic())
+                .flatMapMany(Flux::fromIterable)
+                .map(ItemJpaEntity::toDomain);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/model/ItemJpaEntity.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/model/ItemJpaEntity.java
@@ -0,0 +1,39 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item.model;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.domain.item.model.Item;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.ZonedDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "item")
+@AllArgsConstructor
+@NoArgsConstructor
+@Getter
+@Setter
+public class ItemJpaEntity {
+    @Id
+    private UUID id;
+    @Column(nullable = false)
+    private String name;
+    @Column(nullable = false)
+    private ZonedDateTime sharedDate;
+
+    public ItemJpaEntity(Item item) {
+        id = item.id();
+        name = item.name();
+        sharedDate = item.sharedDate();
+    }
+
+    public Item toDomain() {
+        return new Item(id, name, sharedDate);
+    }
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/repository/ItemJpaRepository.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/infrastructure/item/repository/ItemJpaRepository.java
@@ -0,0 +1,11 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item.repository;
+
+import com.zeenea.experiments.virtualthreads.reactorapp.infrastructure.item.model.ItemJpaEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.UUID;
+
+@Repository
+public interface ItemJpaRepository extends JpaRepository<ItemJpaEntity, UUID> {
+}
--- a/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/launcher/ReactorApplication.java
+++ b/reactor-app/src/main/java/com/zeenea/experiments/virtualthreads/reactorapp/launcher/ReactorApplication.java
@@ -0,0 +1,11 @@
+package com.zeenea.experiments.virtualthreads.reactorapp.launcher;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication(scanBasePackages = "com.zeenea.experiments.virtualthreads.reactorapp")
+public class ReactorApplication {
+	public static void main(String[] args) {
+		SpringApplication.run(ReactorApplication.class, args);
+	}
+}
--- a/reactor-app/src/main/resources/application.yml
+++ b/reactor-app/src/main/resources/application.yml
@@ -0,0 +1,14 @@
+spring:
+  application:
+    name: reactor-app
+  datasource:
+    driverClassName: org.postgresql.Driver
+    url: jdbc:postgresql://localhost:51000/virtual_threads_test_db
+    username: virtual_threads_test_user
+    password: password
+  threads:
+    virtual:
+      enabled: true
+
+server:
+  port: 52001
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -0,0 +1,3 @@
+rootProject.name = "virtual-threads-experiences"
+include("reactor-app")
+include("virtual-threads-app")
--- a/virtual-threads-app/build.gradle.kts
+++ b/virtual-threads-app/build.gradle.kts
@@ -0,0 +1,24 @@
+plugins {
+    id("java")
+    id("org.springframework.boot")
+    id("io.spring.dependency-management")
+}
+
+group = "com.zeenea.experiments.virtualthreads.virtualthreadsapp"
+version = "0.0.1-SNAPSHOT"
+
+dependencies {
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    developmentOnly("org.springframework.boot:spring-boot-devtools")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    runtimeOnly("org.postgresql:postgresql")
+    compileOnly("org.projectlombok:lombok")
+    annotationProcessor("org.projectlombok:lombok")
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+    testImplementation("io.projectreactor:reactor-test")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/configuration/JpaConfiguration.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/configuration/JpaConfiguration.java
@@ -0,0 +1,10 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.configuration;
+
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+
+@Configuration
+@EnableJpaRepositories("com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure")
+@EntityScan("com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure")
+public class JpaConfiguration {}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/CatalogService.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/CatalogService.java
@@ -0,0 +1,21 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.port.CatalogPort;
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+public class CatalogService {
+    private final CatalogPort catalogPort;
+
+    public CatalogService(CatalogPort catalogPort) {
+        this.catalogPort = catalogPort;
+    }
+
+    public Optional<Catalog> getById(UUID catalogId) {
+        return catalogPort.getById(catalogId);
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/model/Catalog.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/model/Catalog.java
@@ -0,0 +1,5 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model;
+
+import java.util.UUID;
+
+public record Catalog(UUID id, String name) {}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/port/CatalogPort.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/domain/catalog/port/CatalogPort.java
@@ -0,0 +1,10 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.port;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model.Catalog;
+
+import java.util.Optional;
+import java.util.UUID;
+
+public interface CatalogPort {
+    Optional<Catalog> getById(UUID catalogId);
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/ThreadController.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/ThreadController.java
@@ -0,0 +1,14 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.exposition;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/thread")
+public class ThreadController {
+    @GetMapping("/name")
+    public String getThreadName() {
+        return Thread.currentThread().getName();
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/catalog/CatalogController.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/catalog/CatalogController.java
@@ -0,0 +1,27 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.exposition.catalog;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.CatalogService;
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.exposition.catalog.model.CatalogDto;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/catalogs")
+public class CatalogController {
+    private final CatalogService catalogService;
+
+    public CatalogController(CatalogService catalogService) {
+        this.catalogService = catalogService;
+    }
+
+    @GetMapping("/{catalogId}")
+    public Optional<CatalogDto> getById(@PathVariable("catalogId") UUID catalogId) {
+        return catalogService.getById(catalogId)
+                .map(CatalogDto::new);
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/catalog/model/CatalogDto.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/exposition/catalog/model/CatalogDto.java
@@ -0,0 +1,14 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.exposition.catalog.model;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model.Catalog;
+
+import java.util.UUID;
+
+public record CatalogDto(
+        UUID id,
+        String name
+) {
+    public CatalogDto(Catalog catalog) {
+        this(catalog.id(), catalog.name());
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/CatalogJpaAdapter.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/CatalogJpaAdapter.java
@@ -0,0 +1,25 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model.Catalog;
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.port.CatalogPort;
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog.model.CatalogJpaEntity;
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog.repository.CatalogJpaRepository;
+import org.springframework.stereotype.Component;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@Component
+public class CatalogJpaAdapter implements CatalogPort {
+    private final CatalogJpaRepository catalogJpaRepository;
+
+    public CatalogJpaAdapter(CatalogJpaRepository catalogJpaRepository) {
+        this.catalogJpaRepository = catalogJpaRepository;
+    }
+
+    @Override
+    public Optional<Catalog> getById(UUID catalogId) {
+        return catalogJpaRepository.findById(catalogId)
+                .map(CatalogJpaEntity::toDomain);
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/model/CatalogJpaEntity.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/model/CatalogJpaEntity.java
@@ -0,0 +1,35 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog.model;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.domain.catalog.model.Catalog;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.util.UUID;
+
+@Entity
+@Table(name = "catalog")
+@NoArgsConstructor
+@AllArgsConstructor
+@Getter
+@Setter
+public class CatalogJpaEntity {
+    @Id
+    private UUID id;
+    @Column(nullable = false)
+    private String name;
+
+    public CatalogJpaEntity(Catalog catalog) {
+        id = catalog.id();
+        name = catalog.name();
+    }
+
+    public Catalog toDomain() {
+        return new Catalog(id, name);
+    }
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/repository/CatalogJpaRepository.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/infrastructure/catalog/repository/CatalogJpaRepository.java
@@ -0,0 +1,12 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog.repository;
+
+import com.zeenea.experiments.virtualthreads.virtualthreadsapp.infrastructure.catalog.model.CatalogJpaEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.UUID;
+
+@Repository
+public interface CatalogJpaRepository extends JpaRepository<CatalogJpaEntity, UUID> {
+
+}
--- a/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/launcher/VirtualThreadsApplication.java
+++ b/virtual-threads-app/src/main/java/com/zeenea/experiments/virtualthreads/virtualthreadsapp/launcher/VirtualThreadsApplication.java
@@ -0,0 +1,12 @@
+package com.zeenea.experiments.virtualthreads.virtualthreadsapp.launcher;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication(scanBasePackages = "com.zeenea.experiments.virtualthreads.virtualthreadsapp")
+
+public class VirtualThreadsApplication {
+	public static void main(String[] args) {
+		SpringApplication.run(VirtualThreadsApplication.class, args);
+	}
+}
--- a/virtual-threads-app/src/main/resources/application.yml
+++ b/virtual-threads-app/src/main/resources/application.yml
@@ -0,0 +1,14 @@
+spring:
+  application:
+    name: virtual-threads-app
+  datasource:
+    driverClassName: org.postgresql.Driver
+    url: jdbc:postgresql://localhost:51000/virtual_threads_test_db
+    username: virtual_threads_test_user
+    password: password
+  threads:
+    virtual:
+      enabled: true
+
+server:
+  port: 51001
--- a/virtual-threads-app/src/main/resources/sql/init_database.sql
+++ b/virtual-threads-app/src/main/resources/sql/init_database.sql
@@ -0,0 +1,14 @@
+\c virtual_threads_db;
+
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+CREATE TABLE IF NOT EXISTS catalog (
+    id UUID NOT NULL PRIMARY KEY,
+    name VARCHAR NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS item (
+    id UUID NOT NULL PRIMARY KEY,
+    name VARCHAR NOT NULL,
+    shared_date TIMESTAMP WITH TIME ZONE NOT NULL
+);