init

.gitignore

@@ -0,0 +1,82 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+### Kotlin template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+

build.gradle.kts

@@ -0,0 +1,55 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    id("org.springframework.boot") version "2.3.0.RELEASE"
+    id("io.spring.dependency-management") version "1.0.9.RELEASE"
+    kotlin("jvm") version "1.3.72"
+    kotlin("plugin.spring") version "1.3.72"
+}
+
+group = "com.github.aleksanin"
+version = "0.0.1-SNAPSHOT"
+java.sourceCompatibility = JavaVersion.VERSION_11
+
+configurations {
+    compileOnly {
+        extendsFrom(configurations.annotationProcessor.get())
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("io.github.microutils:kotlin-logging:1.7.9")
+
+    implementation("org.springframework.boot:spring-boot-starter-cache")
+    implementation("org.springframework.boot:spring-boot-starter-data-redis-reactive")
+    implementation("org.springframework.boot:spring-boot-starter-webflux")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+    implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
+    implementation("org.jetbrains.kotlin:kotlin-reflect")
+    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
+
+    developmentOnly("org.springframework.boot:spring-boot-devtools")
+    annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test") {
+        exclude(group = "org.junit.vintage", module = "junit-vintage-engine")
+    }
+    testImplementation("io.projectreactor:reactor-test")
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions {
+        freeCompilerArgs = listOf("-Xjsr305=strict")
+        jvmTarget = "1.8"
+    }
+}

docker-compose.yml

@@ -0,0 +1,9 @@
+version: "3"
+
+services:
+
+  redis:
+    image: redis:6.0.3-alpine
+    hostname: redis
+    ports:
+      - "6379:6379"

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ]; do
+  ls=$(ls -ld "$PRG")
+  link=$(expr "$ls" : '.*-> \(.*\)$')
+  if expr "$link" : '/.*' >/dev/null; then
+    PRG="$link"
+  else
+    PRG=$(dirname "$PRG")"/$link"
+  fi
+done
+SAVED="$(pwd)"
+cd "$(dirname \"$PRG\")/" >/dev/null
+APP_HOME="$(pwd -P)"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=$(basename "$0")
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn() {
+  echo "$*"
+}
+
+die() {
+  echo
+  echo "$*"
+  echo
+  exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$(uname)" in
+CYGWIN*)
+  cygwin=true
+  ;;
+Darwin*)
+  darwin=true
+  ;;
+MINGW*)
+  msys=true
+  ;;
+NONSTOP*)
+  nonstop=true
+  ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ]; then
+  if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+    # IBM's JDK on AIX uses strange locations for the executables
+    JAVACMD="$JAVA_HOME/jre/sh/java"
+  else
+    JAVACMD="$JAVA_HOME/bin/java"
+  fi
+  if [ ! -x "$JAVACMD" ]; then
+    die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+  fi
+else
+  JAVACMD="java"
+  which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ]; then
+  MAX_FD_LIMIT=$(ulimit -H -n)
+  if [ $? -eq 0 ]; then
+    if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ]; then
+      MAX_FD="$MAX_FD_LIMIT"
+    fi
+    ulimit -n $MAX_FD
+    if [ $? -ne 0 ]; then
+      warn "Could not set maximum file descriptor limit: $MAX_FD"
+    fi
+  else
+    warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+  fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+  GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ]; then
+  APP_HOME=$(cygpath --path --mixed "$APP_HOME")
+  CLASSPATH=$(cygpath --path --mixed "$CLASSPATH")
+  JAVACMD=$(cygpath --unix "$JAVACMD")
+
+  # We build the pattern for arguments to be converted via cygpath
+  ROOTDIRSRAW=$(find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null)
+  SEP=""
+  for dir in $ROOTDIRSRAW; do
+    ROOTDIRS="$ROOTDIRS$SEP$dir"
+    SEP="|"
+  done
+  OURCYGPATTERN="(^($ROOTDIRS))"
+  # Add a user-defined pattern to the cygpath arguments
+  if [ "$GRADLE_CYGPATTERN" != "" ]; then
+    OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+  fi
+  # Now convert the arguments - kludge to limit ourselves to /bin/sh
+  i=0
+  for arg in "$@"; do
+    CHECK=$(echo "$arg" | egrep -c "$OURCYGPATTERN" -)
+    CHECK2=$(echo "$arg" | egrep -c "^-") ### Determine if an option
+
+    if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ]; then ### Added a condition
+      eval $(echo args$i)=$(cygpath --path --ignore --mixed "$arg")
+    else
+      eval $(echo args$i)="\"$arg\""
+    fi
+    i=$(expr $i + 1)
+  done
+  case $i in
+  0) set -- ;;
+  1) set -- "$args0" ;;
+  2) set -- "$args0" "$args1" ;;
+  3) set -- "$args0" "$args1" "$args2" ;;
+  4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+  5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+  6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+  7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+  8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+  9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+  esac
+fi
+
+# Escape application args
+save() {
+  for i; do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/"; done
+  echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,103 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+: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 %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1 @@
+rootProject.name = "redis-cache-spring"

src/main/kotlin/com/github/aleksanin/rediscachespring/RedisCacheSpringApplication.kt

@@ -0,0 +1,65 @@
+package com.github.aleksanin.rediscachespring
+
+import mu.KotlinLogging
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+import org.springframework.cache.annotation.Caching
+import org.springframework.data.redis.core.ReactiveRedisTemplate
+import org.springframework.data.redis.core.ScanOptions
+import org.springframework.stereotype.Service
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RestController
+import reactor.core.publisher.Mono
+import java.util.concurrent.ConcurrentHashMap
+
+@SpringBootApplication
+class RedisCacheSpringApplication
+
+fun main(args: Array<String>) {
+    runApplication<RedisCacheSpringApplication>(*args)
+}
+
+@RestController
+class TestController(
+    private val service: CachingTestService
+) {
+
+    @PostMapping
+    fun test(@RequestBody ids: List<String>): Mono<List<TestEntity>> = service.getData(ids)
+}
+
+data class TestEntity(
+    val id: String,
+    val name: String
+)
+
+@Service
+class CachingTestService(
+    private val service: TestService,
+    private val redis: ReactiveRedisTemplate<String, TestEntity>
+) {
+
+    private val cache = ConcurrentHashMap<String, TestEntity>()
+
+    @Caching
+    fun getData(ids: List<String>): Mono<List<TestEntity>> {
+        redis.scan(ScanOptions.scanOptions().match("")).collectList().map {  }
+        return service.getData(ids)
+    }
+
+    @Service
+    class TestService {
+
+        private val log = KotlinLogging.logger { }
+
+        companion object {
+            private val data = listOf(TestEntity("1", "1"), TestEntity("2", "2"))
+        }
+
+        fun getData(ids: List<String>): Mono<List<TestEntity>> = Mono.fromCallable {
+            data.filter { ids.contains(it.id) }
+                .also { log.debug { "Service called with $ids and response is $it" } }
+        }
+
+    }

src/main/resources/application.yml

@@ -0,0 +1,8 @@
+spring:
+  redis:
+    host: localhost
+    port: 6379
+
+logging:
+  level:
+    com.github.aleksanin: debug

src/test/kotlin/com/github/aleksanin/rediscachespring/RedisCacheSpringApplicationTests.kt

@@ -0,0 +1,13 @@
+package com.github.aleksanin.rediscachespring
+
+import org.junit.jupiter.api.Test
+import org.springframework.boot.test.context.SpringBootTest
+
+@SpringBootTest
+class RedisCacheSpringApplicationTests {
+
+    @Test
+    fun contextLoads() {
+    }
+
+}

test.http

@@ -0,0 +1,6 @@
+POST http://localhost:8080/
+Content-Type: application/json
+
+["2"]
+
+###