├── src ├── test │ ├── resources │ │ └── application.yml │ └── java │ │ └── com │ │ └── example │ │ └── demo │ │ └── DemoApplicationTests.java └── main │ ├── resources │ ├── application.yml │ └── init.sql │ └── java │ └── com │ └── example │ └── demo │ ├── Book.java │ ├── TranslationService.java │ └── DemoApplication.java ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── settings.gradle ├── docker-compose.yml ├── .gitignore ├── gradlew.bat └── gradlew /src/test/resources/application.yml: -------------------------------------------------------------------------------- 1 | server: 2 | port: 0 -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/alek-sys/spring-microframework-talk/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /src/main/resources/application.yml: -------------------------------------------------------------------------------- 1 | spring: 2 | r2dbc: 3 | url: r2dbc:postgresql://localhost/postgres 4 | username: postgres 5 | password: password -------------------------------------------------------------------------------- /src/main/java/com/example/demo/Book.java: -------------------------------------------------------------------------------- 1 | package com.example.demo; 2 | 3 | import lombok.Data; 4 | 5 | @Data 6 | public class Book { 7 | 8 | private final Integer id; 9 | private final String title; 10 | 11 | } 12 | -------------------------------------------------------------------------------- /src/main/resources/init.sql: -------------------------------------------------------------------------------- 1 | create table if not exists book (id serial primary key, title varchar); 2 | 3 | truncate table book; 4 | 5 | insert into book (title) values ('A year in Provence'); 6 | insert into book (title) values ('The Magic Mountain'); -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /src/main/java/com/example/demo/TranslationService.java: -------------------------------------------------------------------------------- 1 | package com.example.demo; 2 | 3 | public class TranslationService { 4 | 5 | String translateTitle(String lang, String title) { 6 | if ("fr".equals(lang) && "A year in Provence".equals(title)) { 7 | return "Une année en Provence"; 8 | } 9 | 10 | return title; 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | pluginManagement { 2 | repositories { 3 | maven { url 'https://repo.spring.io/milestone' } 4 | gradlePluginPortal() 5 | } 6 | resolutionStrategy { 7 | eachPlugin { 8 | if (requested.id.id == 'org.springframework.boot') { 9 | useModule("org.springframework.boot:spring-boot-gradle-plugin:${requested.version}") 10 | } 11 | } 12 | } 13 | } 14 | rootProject.name = 'demo' 15 | -------------------------------------------------------------------------------- /docker-compose.yml: -------------------------------------------------------------------------------- 1 | version: "3.8" 2 | services: 3 | web: 4 | image: demo:0.0.1-SNAPSHOT 5 | ports: 6 | - "8080:8080" 7 | environment: 8 | SPRING_R2DBC_URL: r2dbc:postgresql://database/postgres 9 | SPRING_R2DBC_USERNAME: postgres 10 | SPRING_R2DBC_PASSWORD: postgres-pwd 11 | links: 12 | - database 13 | database: 14 | image: postgres 15 | environment: 16 | POSTGRES_PASSWORD: postgres-pwd 17 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/** 6 | !**/src/test/** 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | 17 | ### IntelliJ IDEA ### 18 | .idea 19 | *.iws 20 | *.iml 21 | *.ipr 22 | out/ 23 | 24 | ### NetBeans ### 25 | /nbproject/private/ 26 | /nbbuild/ 27 | /dist/ 28 | /nbdist/ 29 | /.nb-gradle/ 30 | 31 | ### VS Code ### 32 | .vscode/ 33 | -------------------------------------------------------------------------------- /src/test/java/com/example/demo/DemoApplicationTests.java: -------------------------------------------------------------------------------- 1 | package com.example.demo; 2 | 3 | import org.junit.jupiter.api.AfterAll; 4 | import org.junit.jupiter.api.BeforeAll; 5 | import org.junit.jupiter.api.Test; 6 | import org.junit.jupiter.api.TestInstance; 7 | import org.springframework.context.ConfigurableApplicationContext; 8 | import org.springframework.test.web.reactive.server.WebTestClient; 9 | 10 | import static com.example.demo.DemoApplication.buildApp; 11 | import static org.hamcrest.Matchers.equalTo; 12 | 13 | @TestInstance(TestInstance.Lifecycle.PER_CLASS) 14 | class DemoApplicationTests { 15 | 16 | private ConfigurableApplicationContext applicationContext; 17 | private WebTestClient webTestClient; 18 | 19 | @BeforeAll 20 | void setUp() { 21 | applicationContext = buildApp().run(); 22 | webTestClient = WebTestClient.bindToApplicationContext(applicationContext).build(); 23 | } 24 | 25 | @AfterAll 26 | void tearDown() { 27 | applicationContext.close(); 28 | } 29 | 30 | @Test 31 | void shouldReturnListOfBooks() { 32 | webTestClient.get().uri("/book") 33 | .exchange() 34 | .expectBody() 35 | .jsonPath("$").isArray() 36 | .jsonPath("$[0].title").value(equalTo("A year in Provence")); 37 | } 38 | 39 | @Test 40 | void shouldTranslateTitle() { 41 | webTestClient.get().uri("/book?lang=fr") 42 | .exchange() 43 | .expectBody() 44 | .jsonPath("$[0].title").value(equalTo("Une année en Provence")); 45 | } 46 | 47 | } 48 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto init 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto init 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :init 68 | @rem Get command-line arguments, handling Windows variants 69 | 70 | if not "%OS%" == "Windows_NT" goto win9xME_args 71 | 72 | :win9xME_args 73 | @rem Slurp the command line arguments. 74 | set CMD_LINE_ARGS= 75 | set _SKIP=2 76 | 77 | :win9xME_args_slurp 78 | if "x%~1" == "x" goto execute 79 | 80 | set CMD_LINE_ARGS=%* 81 | 82 | :execute 83 | @rem Setup the command line 84 | 85 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 86 | 87 | @rem Execute Gradle 88 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 89 | 90 | :end 91 | @rem End local scope for the variables with windows NT shell 92 | if "%ERRORLEVEL%"=="0" goto mainEnd 93 | 94 | :fail 95 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 96 | rem the _cmd.exe /c_ return code! 97 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 98 | exit /b 1 99 | 100 | :mainEnd 101 | if "%OS%"=="Windows_NT" endlocal 102 | 103 | :omega 104 | -------------------------------------------------------------------------------- /src/main/java/com/example/demo/DemoApplication.java: -------------------------------------------------------------------------------- 1 | package com.example.demo; 2 | 3 | import io.r2dbc.spi.ConnectionFactory; 4 | import org.springframework.boot.SpringApplication; 5 | import org.springframework.boot.autoconfigure.data.r2dbc.R2dbcDataAutoConfiguration; 6 | import org.springframework.boot.autoconfigure.r2dbc.R2dbcAutoConfiguration; 7 | import org.springframework.boot.autoconfigure.web.reactive.HttpHandlerAutoConfiguration; 8 | import org.springframework.boot.autoconfigure.web.reactive.ReactiveWebServerFactoryAutoConfiguration; 9 | import org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration; 10 | import org.springframework.boot.autoconfigure.web.reactive.error.ErrorWebFluxAutoConfiguration; 11 | import org.springframework.boot.builder.SpringApplicationBuilder; 12 | import org.springframework.context.support.GenericApplicationContext; 13 | import org.springframework.r2dbc.core.DatabaseClient; 14 | import org.springframework.web.reactive.function.server.RouterFunction; 15 | import org.springframework.web.reactive.function.server.ServerResponse; 16 | 17 | import static org.springframework.web.reactive.function.server.RouterFunctions.route; 18 | import org.springframework.core.io.ClassPathResource; 19 | import org.springframework.r2dbc.connection.init.ConnectionFactoryInitializer; 20 | import org.springframework.r2dbc.connection.init.ResourceDatabasePopulator; 21 | 22 | public class DemoApplication { 23 | 24 | private final static Class[] autoConfigurationClasses = {ReactiveWebServerFactoryAutoConfiguration.class, 25 | // web 26 | HttpHandlerAutoConfiguration.class, 27 | WebFluxAutoConfiguration.class, 28 | ErrorWebFluxAutoConfiguration.class, 29 | 30 | // data 31 | R2dbcAutoConfiguration.class, 32 | R2dbcDataAutoConfiguration.class}; 33 | 34 | public static SpringApplication buildApp() { 35 | var translationService = new TranslationService(); 36 | 37 | return new SpringApplicationBuilder(DemoApplication.class) 38 | .sources(autoConfigurationClasses) 39 | .initializers((GenericApplicationContext applicationContext) -> { 40 | applicationContext.registerBean(ConnectionFactoryInitializer.class, () -> { 41 | ConnectionFactory connectionFactory = applicationContext.getBean(ConnectionFactory.class); 42 | 43 | ConnectionFactoryInitializer initializer = new ConnectionFactoryInitializer(); 44 | initializer.setConnectionFactory(connectionFactory); 45 | initializer.setDatabasePopulator(new ResourceDatabasePopulator(new ClassPathResource("init.sql"))); 46 | 47 | return initializer; 48 | }); 49 | 50 | applicationContext.registerBean(RouterFunction.class, () -> { 51 | var repo = applicationContext.getBean(DatabaseClient.class); 52 | return route() 53 | .GET("/book", request -> { 54 | var lang = request.queryParam("lang").orElse(""); 55 | var translatedBooks = repo 56 | .sql("select * from book") 57 | .map(row -> new Book(row.get("id", Integer.class), row.get("title", String.class))) 58 | .all() 59 | .map(book -> new Book( 60 | book.getId(), 61 | translationService.translateTitle(lang, book.getTitle()) 62 | )); 63 | 64 | return ServerResponse.ok().body(translatedBooks, Book.class); 65 | }) 66 | .build(); 67 | }); 68 | }) 69 | .build(); 70 | } 71 | 72 | public static void main(String[] args) { 73 | buildApp().run(args); 74 | } 75 | 76 | } 77 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | # Determine the Java command to use to start the JVM. 86 | if [ -n "$JAVA_HOME" ] ; then 87 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 88 | # IBM's JDK on AIX uses strange locations for the executables 89 | JAVACMD="$JAVA_HOME/jre/sh/java" 90 | else 91 | JAVACMD="$JAVA_HOME/bin/java" 92 | fi 93 | if [ ! -x "$JAVACMD" ] ; then 94 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 95 | 96 | Please set the JAVA_HOME variable in your environment to match the 97 | location of your Java installation." 98 | fi 99 | else 100 | JAVACMD="java" 101 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 102 | 103 | Please set the JAVA_HOME variable in your environment to match the 104 | location of your Java installation." 105 | fi 106 | 107 | # Increase the maximum file descriptors if we can. 108 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 109 | MAX_FD_LIMIT=`ulimit -H -n` 110 | if [ $? -eq 0 ] ; then 111 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 112 | MAX_FD="$MAX_FD_LIMIT" 113 | fi 114 | ulimit -n $MAX_FD 115 | if [ $? -ne 0 ] ; then 116 | warn "Could not set maximum file descriptor limit: $MAX_FD" 117 | fi 118 | else 119 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 120 | fi 121 | fi 122 | 123 | # For Darwin, add options to specify how the application appears in the dock 124 | if $darwin; then 125 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 126 | fi 127 | 128 | # For Cygwin or MSYS, switch paths to Windows format before running java 129 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 130 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 131 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 132 | JAVACMD=`cygpath --unix "$JAVACMD"` 133 | 134 | # We build the pattern for arguments to be converted via cygpath 135 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 136 | SEP="" 137 | for dir in $ROOTDIRSRAW ; do 138 | ROOTDIRS="$ROOTDIRS$SEP$dir" 139 | SEP="|" 140 | done 141 | OURCYGPATTERN="(^($ROOTDIRS))" 142 | # Add a user-defined pattern to the cygpath arguments 143 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 144 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 145 | fi 146 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 147 | i=0 148 | for arg in "$@" ; do 149 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 150 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 151 | 152 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 153 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 154 | else 155 | eval `echo args$i`="\"$arg\"" 156 | fi 157 | i=`expr $i + 1` 158 | done 159 | case $i in 160 | 0) set -- ;; 161 | 1) set -- "$args0" ;; 162 | 2) set -- "$args0" "$args1" ;; 163 | 3) set -- "$args0" "$args1" "$args2" ;; 164 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 165 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 166 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 167 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 168 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 169 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 170 | esac 171 | fi 172 | 173 | # Escape application args 174 | save () { 175 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 176 | echo " " 177 | } 178 | APP_ARGS=`save "$@"` 179 | 180 | # Collect all arguments for the java command, following the shell quoting and substitution rules 181 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 182 | 183 | exec "$JAVACMD" "$@" 184 | --------------------------------------------------------------------------------