├── .gitignore ├── .mvn └── wrapper │ ├── maven-wrapper.jar │ └── maven-wrapper.properties ├── LICENSE.txt ├── mvnw ├── mvnw.cmd ├── pom.xml ├── readme.adoc └── src ├── main ├── java │ └── de │ │ └── olivergierke │ │ └── examples │ │ └── spring5 │ │ └── webflux │ │ ├── EventController.java │ │ ├── WebfluxDemo.java │ │ └── fn │ │ ├── User.java │ │ ├── UserRepository.java │ │ └── WebfluxFnConfiguration.java └── resources │ ├── application.properties │ └── banner.txt └── test └── java └── de └── olivergierke └── examples └── spring5 └── reactor └── ReactorSample.java /.gitignore: -------------------------------------------------------------------------------- 1 | target/ 2 | !.mvn/wrapper/maven-wrapper.jar 3 | 4 | ### STS ### 5 | .apt_generated 6 | .classpath 7 | .factorypath 8 | .project 9 | .settings 10 | .springBeans 11 | 12 | ### IntelliJ IDEA ### 13 | .idea 14 | *.iws 15 | *.iml 16 | *.ipr 17 | 18 | ### NetBeans ### 19 | nbproject/private/ 20 | build/ 21 | nbbuild/ 22 | dist/ 23 | nbdist/ 24 | .nb-gradle/ -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/odrotbohm/spring-five-functional-reactive/71456c59efd5569e9c2a23e8ac0a6ae902e05e6d/.mvn/wrapper/maven-wrapper.jar -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.3.9/apache-maven-3.3.9-bin.zip 2 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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[ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then 145 | # readlink(1) is not available as standard on Solaris 10. 146 | readLink=`which readlink` 147 | if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then 148 | if $darwin ; then 149 | javaHome="`dirname \"$javaExecutable\"`" 150 | javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" 151 | else 152 | javaExecutable="`readlink -f \"$javaExecutable\"`" 153 | fi 154 | javaHome="`dirname \"$javaExecutable\"`" 155 | javaHome=`expr "$javaHome" : '\(.*\)/bin'` 156 | JAVA_HOME="$javaHome" 157 | export JAVA_HOME 158 | fi 159 | fi 160 | fi 161 | 162 | if [ -z "$JAVACMD" ] ; then 163 | if [ -n "$JAVA_HOME" ] ; then 164 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 165 | # IBM's JDK on AIX uses strange locations for the executables 166 | JAVACMD="$JAVA_HOME/jre/sh/java" 167 | else 168 | JAVACMD="$JAVA_HOME/bin/java" 169 | fi 170 | else 171 | JAVACMD="`which java`" 172 | fi 173 | fi 174 | 175 | if [ ! -x "$JAVACMD" ] ; then 176 | echo "Error: JAVA_HOME is not defined correctly." >&2 177 | echo " We cannot execute $JAVACMD" >&2 178 | exit 1 179 | fi 180 | 181 | if [ -z "$JAVA_HOME" ] ; then 182 | echo "Warning: JAVA_HOME environment variable is not set." 183 | fi 184 | 185 | CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher 186 | 187 | # For Cygwin, switch paths to Windows format before running java 188 | if $cygwin; then 189 | [ -n "$M2_HOME" ] && 190 | M2_HOME=`cygpath --path --windows "$M2_HOME"` 191 | [ -n "$JAVA_HOME" ] && 192 | JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` 193 | [ -n "$CLASSPATH" ] && 194 | CLASSPATH=`cygpath --path --windows "$CLASSPATH"` 195 | fi 196 | 197 | # traverses directory structure from process work directory to filesystem root 198 | # first directory with .mvn subdirectory is considered project base directory 199 | find_maven_basedir() { 200 | local basedir=$(pwd) 201 | local wdir=$(pwd) 202 | while [ "$wdir" != '/' ] ; do 203 | if [ -d "$wdir"/.mvn ] ; then 204 | basedir=$wdir 205 | break 206 | fi 207 | wdir=$(cd "$wdir/.."; pwd) 208 | done 209 | echo "${basedir}" 210 | } 211 | 212 | # concatenates all lines of a file 213 | concat_lines() { 214 | if [ -f "$1" ]; then 215 | echo "$(tr -s '\n' ' ' < "$1")" 216 | fi 217 | } 218 | 219 | export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-$(find_maven_basedir)} 220 | MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" 221 | 222 | # Provide a "standardized" way to retrieve the CLI args that will 223 | # work with both Windows and non-Windows executions. 224 | MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@" 225 | export MAVEN_CMD_LINE_ARGS 226 | 227 | WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 228 | 229 | exec "$JAVACMD" \ 230 | $MAVEN_OPTS \ 231 | -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ 232 | "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ 233 | ${WRAPPER_LAUNCHER} "$@" 234 | -------------------------------------------------------------------------------- /mvnw.cmd: -------------------------------------------------------------------------------- 1 | @REM ---------------------------------------------------------------------------- 2 | @REM Licensed to the Apache Software Foundation (ASF) under one 3 | @REM or more contributor license agreements. See the NOTICE file 4 | @REM distributed with this work for additional information 5 | @REM regarding copyright ownership. The ASF licenses this file 6 | @REM to you under the Apache License, Version 2.0 (the 7 | @REM "License"); you may not use this file except in compliance 8 | @REM with the License. You may obtain a copy of the License at 9 | @REM 10 | @REM http://www.apache.org/licenses/LICENSE-2.0 11 | @REM 12 | @REM Unless required by applicable law or agreed to in writing, 13 | @REM software distributed under the License is distributed on an 14 | @REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 | @REM KIND, either express or implied. See the License for the 16 | @REM specific language governing permissions and limitations 17 | @REM under the License. 18 | @REM ---------------------------------------------------------------------------- 19 | 20 | @REM ---------------------------------------------------------------------------- 21 | @REM Maven2 Start Up Batch script 22 | @REM 23 | @REM Required ENV vars: 24 | @REM JAVA_HOME - location of a JDK home dir 25 | @REM 26 | @REM Optional ENV vars 27 | @REM M2_HOME - location of maven2's installed home dir 28 | @REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands 29 | @REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending 30 | @REM MAVEN_OPTS - parameters passed to the Java VM when running Maven 31 | @REM e.g. to debug Maven itself, use 32 | @REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 33 | @REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files 34 | @REM ---------------------------------------------------------------------------- 35 | 36 | @REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' 37 | @echo off 38 | @REM enable echoing my setting MAVEN_BATCH_ECHO to 'on' 39 | @if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% 40 | 41 | @REM set %HOME% to equivalent of $HOME 42 | if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") 43 | 44 | @REM Execute a user defined script before this one 45 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre 46 | @REM check for pre script, once with legacy .bat ending and once with .cmd ending 47 | if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" 48 | if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" 49 | :skipRcPre 50 | 51 | @setlocal 52 | 53 | set ERROR_CODE=0 54 | 55 | @REM To isolate internal variables from possible post scripts, we use another setlocal 56 | @setlocal 57 | 58 | @REM ==== START VALIDATION ==== 59 | if not "%JAVA_HOME%" == "" goto OkJHome 60 | 61 | echo. 62 | echo Error: JAVA_HOME not found in your environment. >&2 63 | echo Please set the JAVA_HOME variable in your environment to match the >&2 64 | echo location of your Java installation. >&2 65 | echo. 66 | goto error 67 | 68 | :OkJHome 69 | if exist "%JAVA_HOME%\bin\java.exe" goto init 70 | 71 | echo. 72 | echo Error: JAVA_HOME is set to an invalid directory. >&2 73 | echo JAVA_HOME = "%JAVA_HOME%" >&2 74 | echo Please set the JAVA_HOME variable in your environment to match the >&2 75 | echo location of your Java installation. >&2 76 | echo. 77 | goto error 78 | 79 | @REM ==== END VALIDATION ==== 80 | 81 | :init 82 | 83 | set MAVEN_CMD_LINE_ARGS=%* 84 | 85 | @REM Find the project base dir, i.e. the directory that contains the folder ".mvn". 86 | @REM Fallback to current working directory if not found. 87 | 88 | set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% 89 | IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir 90 | 91 | set EXEC_DIR=%CD% 92 | set WDIR=%EXEC_DIR% 93 | :findBaseDir 94 | IF EXIST "%WDIR%"\.mvn goto baseDirFound 95 | cd .. 96 | IF "%WDIR%"=="%CD%" goto baseDirNotFound 97 | set WDIR=%CD% 98 | goto findBaseDir 99 | 100 | :baseDirFound 101 | set MAVEN_PROJECTBASEDIR=%WDIR% 102 | cd "%EXEC_DIR%" 103 | goto endDetectBaseDir 104 | 105 | :baseDirNotFound 106 | set MAVEN_PROJECTBASEDIR=%EXEC_DIR% 107 | cd "%EXEC_DIR%" 108 | 109 | :endDetectBaseDir 110 | 111 | IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig 112 | 113 | @setlocal EnableExtensions EnableDelayedExpansion 114 | for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a 115 | @endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% 116 | 117 | :endReadAdditionalConfig 118 | 119 | SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" 120 | 121 | set WRAPPER_JAR="".\.mvn\wrapper\maven-wrapper.jar"" 122 | set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 123 | 124 | %MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CMD_LINE_ARGS% 125 | if ERRORLEVEL 1 goto error 126 | goto end 127 | 128 | :error 129 | set ERROR_CODE=1 130 | 131 | :end 132 | @endlocal & set ERROR_CODE=%ERROR_CODE% 133 | 134 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost 135 | @REM check for post script, once with legacy .bat ending and once with .cmd ending 136 | if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" 137 | if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" 138 | :skipRcPost 139 | 140 | @REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' 141 | if "%MAVEN_BATCH_PAUSE%" == "on" pause 142 | 143 | if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% 144 | 145 | exit /B %ERROR_CODE% -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | de.olivergierke.examples 7 | spring-five-functional-reactive 8 | 1.0.0-SNAPSHOT 9 | 10 | demo 11 | Demo project for Spring Boot 12 | 13 | 14 | org.springframework.boot 15 | spring-boot-starter-parent 16 | 2.0.0.BUILD-SNAPSHOT 17 | 18 | 19 | 20 | 21 | UTF-8 22 | UTF-8 23 | 1.8 24 | 25 | 26 | 27 | 28 | 29 | org.springframework.boot 30 | spring-boot-starter-data-mongodb-reactive 31 | 32 | 33 | 34 | de.flapdoodle.embed 35 | de.flapdoodle.embed.mongo 36 | 37 | 38 | 39 | org.springframework.boot 40 | spring-boot-starter-webflux 41 | 42 | 43 | 44 | org.projectlombok 45 | lombok 46 | 47 | 48 | 49 | org.springframework.boot 50 | spring-boot-starter-test 51 | test 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | org.springframework.boot 60 | spring-boot-maven-plugin 61 | 62 | 63 | 64 | 65 | 66 | 67 | spring-libs-snapshot 68 | Spring Snapshots 69 | https://repo.spring.io/libs-snapshot 70 | 71 | 72 | 73 | 74 | 75 | spring-libs-snapshot 76 | Spring Snapshots 77 | https://repo.spring.io/libs-snapshot 78 | 79 | 80 | 81 | 82 | -------------------------------------------------------------------------------- /readme.adoc: -------------------------------------------------------------------------------- 1 | = Spring 5 - Functional, reactive web example 2 | 3 | This repository contains the sample code for Spring WebFlux's functional web API and consists of the following building blocks: 4 | 5 | == A sample for Spring WebFlux 6 | 7 | 1. An `Event` domain type and a corresponding repository exposing a tailable query method. 8 | 2. An `ApplicationRunner` that creates a capped collection for events and inserts a new one every two seconds. 9 | 3. A Spring WebFlux controller to produce both a Server-Sent Events and JSON stream. 10 | 11 | == A sample for Spring WebFlux.fn 12 | 13 | 1. A `User` domain type and a reactive repository mapped using Spring Data MongoDB. 14 | 2. A `FunctionalWebController` to contain handler functions. 15 | 3. An `@Bean`-Definition for a `RouterFunction` that uses the functional API to configure the mappings of requests to the `FunctionalWebController`. 16 | 17 | == How to run the sample 18 | 19 | ```bash 20 | $ git clone https://github.com/olivergierke/spring-five-functional-reactive 21 | $ cd spring-five-functional-reactive 22 | $ ./mvnw spring-boot:run 23 | 24 | # To see the events inserted on the server streaming to the client 25 | $ curl -H "Accept: text/event-stream" http://localhost:8080/events 26 | 27 | # To trigger the functional controller 28 | $ curl http://localhost:8080/users 29 | ``` -------------------------------------------------------------------------------- /src/main/java/de/olivergierke/examples/spring5/webflux/EventController.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.webflux; 17 | 18 | import lombok.Data; 19 | import lombok.RequiredArgsConstructor; 20 | import reactor.core.publisher.Flux; 21 | 22 | import java.time.LocalDateTime; 23 | 24 | import org.springframework.data.mongodb.core.mapping.Document; 25 | import org.springframework.data.mongodb.repository.Tailable; 26 | import org.springframework.data.repository.reactive.ReactiveCrudRepository; 27 | import org.springframework.http.MediaType; 28 | import org.springframework.web.bind.annotation.GetMapping; 29 | import org.springframework.web.bind.annotation.RestController; 30 | 31 | /** 32 | * @author Mark Paluch 33 | * @author Oliver Gierke 34 | */ 35 | @RestController 36 | @RequiredArgsConstructor 37 | class EventController { 38 | 39 | private final EventRepository eventRepository; 40 | 41 | @GetMapping(path = "/events", produces = { // 42 | MediaType.APPLICATION_STREAM_JSON_VALUE, // 43 | MediaType.TEXT_EVENT_STREAM_VALUE // 44 | }) 45 | Flux streamEvents() { 46 | return eventRepository.findPeopleBy(); 47 | } 48 | } 49 | 50 | @Data 51 | @Document 52 | class Event { 53 | 54 | String id; 55 | final LocalDateTime eventDate; 56 | } 57 | 58 | interface EventRepository extends ReactiveCrudRepository { 59 | 60 | @Tailable 61 | Flux findPeopleBy(); 62 | } 63 | -------------------------------------------------------------------------------- /src/main/java/de/olivergierke/examples/spring5/webflux/WebfluxDemo.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.webflux; 17 | 18 | import reactor.core.publisher.Flux; 19 | 20 | import java.io.IOException; 21 | import java.time.Duration; 22 | import java.time.LocalDateTime; 23 | 24 | import org.springframework.boot.ApplicationRunner; 25 | import org.springframework.boot.SpringApplication; 26 | import org.springframework.boot.autoconfigure.SpringBootApplication; 27 | import org.springframework.context.annotation.Bean; 28 | import org.springframework.data.mongodb.core.CollectionOptions; 29 | import org.springframework.data.mongodb.core.MongoOperations; 30 | import org.springframework.data.mongodb.core.ReactiveMongoOperations; 31 | 32 | /** 33 | * @author Mark Paluch 34 | * @author Oliver Gierke 35 | */ 36 | @SpringBootApplication 37 | public class WebfluxDemo { 38 | 39 | public static void main(String[] args) throws IOException { 40 | SpringApplication.run(WebfluxDemo.class, args); 41 | } 42 | 43 | /** 44 | * Application runner to initialize a capped collection for {@link Event}s and insert a new {@link Event} every two 45 | * seconds. 46 | * 47 | * @param operations 48 | * @param reactiveOperations 49 | * @return 50 | */ 51 | @Bean 52 | ApplicationRunner onStart(MongoOperations operations, ReactiveMongoOperations reactiveOperations) { 53 | 54 | return args -> { 55 | 56 | CollectionOptions options = CollectionOptions.empty() // 57 | .capped() // 58 | .size(2048) // 59 | .maxDocuments(1000); 60 | 61 | operations.dropCollection(Event.class); 62 | operations.createCollection(Event.class, options); 63 | 64 | Flux.interval(Duration.ofSeconds(2)) // 65 | .map(counter -> new Event(LocalDateTime.now())) // 66 | .flatMap(reactiveOperations::save) // 67 | .log() // 68 | .subscribe(); 69 | }; 70 | } 71 | } 72 | -------------------------------------------------------------------------------- /src/main/java/de/olivergierke/examples/spring5/webflux/fn/User.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.webflux.fn; 17 | 18 | import lombok.Data; 19 | 20 | import org.springframework.data.mongodb.core.mapping.Document; 21 | 22 | /** 23 | * A {@link User} domain type. 24 | * 25 | * @author Oliver Gierke 26 | */ 27 | @Data 28 | @Document 29 | class User { 30 | 31 | private String id; 32 | private String name; 33 | 34 | public User(String name) { 35 | this.name = name; 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /src/main/java/de/olivergierke/examples/spring5/webflux/fn/UserRepository.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.webflux.fn; 17 | 18 | import reactor.core.publisher.Flux; 19 | import reactor.core.publisher.Mono; 20 | 21 | import org.springframework.data.repository.Repository; 22 | 23 | /** 24 | * A reactive repository to handle {@link User}s. 25 | * 26 | * @author Oliver Gierke 27 | */ 28 | interface UserRepository extends Repository { 29 | 30 | /** 31 | * Looks up the user with the given identifier. 32 | * 33 | * @param id 34 | * @return 35 | */ 36 | Mono findById(String id); 37 | 38 | /** 39 | * Returns all {@link User}s currently available. 40 | * 41 | * @return 42 | */ 43 | Flux findAll(); 44 | 45 | /** 46 | * Saves the given {@link User}. 47 | * 48 | * @param user 49 | * @return 50 | */ 51 | Mono save(User user); 52 | } 53 | -------------------------------------------------------------------------------- /src/main/java/de/olivergierke/examples/spring5/webflux/fn/WebfluxFnConfiguration.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.webflux.fn; 17 | 18 | import static org.springframework.web.reactive.function.server.RequestPredicates.*; 19 | 20 | import lombok.RequiredArgsConstructor; 21 | import reactor.core.publisher.Flux; 22 | import reactor.core.publisher.Mono; 23 | 24 | import org.springframework.boot.ApplicationRunner; 25 | import org.springframework.context.annotation.Bean; 26 | import org.springframework.context.annotation.Configuration; 27 | import org.springframework.stereotype.Component; 28 | import org.springframework.web.reactive.function.server.RouterFunction; 29 | import org.springframework.web.reactive.function.server.RouterFunctions; 30 | import org.springframework.web.reactive.function.server.ServerRequest; 31 | import org.springframework.web.reactive.function.server.ServerResponse; 32 | 33 | @Configuration 34 | class WebfluxFnConfiguration { 35 | 36 | /** 37 | * Defines the routes mapped to {@link FunctionalUserController}. 38 | * 39 | * @param controller 40 | * @return 41 | */ 42 | @Bean 43 | RouterFunction routes(FunctionalUserController controller) { 44 | 45 | return RouterFunctions// 46 | .route(GET("/users"), controller::getUsers)// 47 | .andRoute(GET("/users/{id}"), controller::getUser); 48 | } 49 | 50 | /** 51 | * Initializes the repository with a sample user. 52 | * 53 | * @param repository the repository to create {@link User}s in. 54 | * @return 55 | */ 56 | @Bean 57 | ApplicationRunner onStartup(UserRepository repository) { 58 | 59 | // We need to call ….block() here to actually execute the call. 60 | return (args) -> repository.save(new User("Dave Matthews")).block(); 61 | } 62 | 63 | /** 64 | * Functional controller in Spring WebFlux. 65 | * 66 | * @author Oliver Gierke 67 | */ 68 | @Component 69 | @RequiredArgsConstructor 70 | static class FunctionalUserController { 71 | 72 | private final UserRepository repository; 73 | 74 | /** 75 | * Returns a single {@link User}. 76 | * 77 | * @param request 78 | * @return 79 | */ 80 | Mono getUser(ServerRequest request) { 81 | 82 | Mono user = Mono.just(request.pathVariable("id")) // 83 | .flatMap(repository::findById); 84 | 85 | return ServerResponse.ok().body(user, User.class); 86 | } 87 | 88 | /** 89 | * Returns all {@link User}s available. 90 | * 91 | * @param request 92 | * @return 93 | */ 94 | Mono getUsers(ServerRequest request) { 95 | 96 | Flux users = repository.findAll(); 97 | return ServerResponse.ok().body(users, User.class); 98 | } 99 | } 100 | } 101 | -------------------------------------------------------------------------------- /src/main/resources/application.properties: -------------------------------------------------------------------------------- 1 | spring.jackson.serialization.write-dates-as-timestamps=false 2 | -------------------------------------------------------------------------------- /src/main/resources/banner.txt: -------------------------------------------------------------------------------- 1 | ${AnsiColor.BRIGHT_BLUE}████████████████████████████████████████████████████████████████████████████████ 2 | ${AnsiColor.BRIGHT_BLUE}████████████████████████████████████████████████████████████████████████████████ 3 | ${AnsiColor.RED}██████████████████${AnsiColor.BRIGHT_BLUE}████████████████${AnsiColor.BLACK}██████████████████████████████${AnsiColor.BRIGHT_BLUE}████████████████ 4 | ${AnsiColor.RED}████████████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████████████████████████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██████████████ 5 | ${AnsiColor.BRIGHT_RED}████${AnsiColor.RED}██████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.MAGENTA}██████████████████████${AnsiColor.WHITE}██████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████████████ 6 | ${AnsiColor.BRIGHT_RED}██████████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.MAGENTA}████████████████${AnsiColor.BLACK}████${AnsiColor.MAGENTA}██████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██${AnsiColor.BLACK}████${AnsiColor.BRIGHT_BLUE}██████ 7 | ${AnsiColor.BRIGHT_RED}██████████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.MAGENTA}██████${AnsiColor.WHITE}██${AnsiColor.BLACK}████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████ 8 | ${AnsiColor.BRIGHT_YELLOW}██████████████████${AnsiColor.BRIGHT_RED}████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.MAGENTA}██████${AnsiColor.WHITE}██${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████ 9 | ${AnsiColor.BRIGHT_YELLOW}██████████████████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_YELLOW}██████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}████████${AnsiColor.WHITE}████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████ 10 | ${AnsiColor.BRIGHT_YELLOW}████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.BLACK}██${AnsiColor.BRIGHT_YELLOW}████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████████████████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████ 11 | ${AnsiColor.BRIGHT_GREEN}██████████████████${AnsiColor.BRIGHT_YELLOW}██${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.BLACK}████████${AnsiColor.WHITE}██${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████████████████████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██ 12 | ${AnsiColor.BRIGHT_GREEN}██████████████████████${AnsiColor.WHITE}████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BRIGHT_YELLOW}██${AnsiColor.WHITE}██████████${AnsiColor.BRIGHT_YELLOW}██${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██ 13 | ${AnsiColor.BRIGHT_GREEN}██████████████████████${AnsiColor.BLACK}████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.BLACK}████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██ 14 | ${AnsiColor.BLUE}██████████████████${AnsiColor.BRIGHT_GREEN}████████${AnsiColor.BLACK}██████${AnsiColor.WHITE}██${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.MAGENTA}████${AnsiColor.WHITE}████████████████${AnsiColor.MAGENTA}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██ 15 | ${AnsiColor.BLUE}██████████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}████████████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████ 16 | ${AnsiColor.BRIGHT_BLUE}██████████████████${AnsiColor.BLUE}████${AnsiColor.BLUE}██████${AnsiColor.BLACK}████${AnsiColor.WHITE}██████${AnsiColor.MAGENTA}██████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████████████████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██████ 17 | ${AnsiColor.BRIGHT_BLUE}██████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██${AnsiColor.BLACK}████${AnsiColor.WHITE}████████████████████${AnsiColor.BLACK}██████████████████${AnsiColor.BRIGHT_BLUE}████████ 18 | ${AnsiColor.BRIGHT_BLUE}████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}██████${AnsiColor.BLACK}████████████████████████████████${AnsiColor.WHITE}██${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████████████ 19 | ${AnsiColor.BRIGHT_BLUE}████████████████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}██${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.BRIGHT_BLUE}████████████${AnsiColor.BLACK}██${AnsiColor.WHITE}████${AnsiColor.BLACK}████${AnsiColor.WHITE}████${AnsiColor.BLACK}██${AnsiColor.BRIGHT_BLUE}████████████ 20 | ${AnsiColor.BRIGHT_BLUE}████████████████████████${AnsiColor.BLACK}██████${AnsiColor.BRIGHT_BLUE}████${AnsiColor.BLACK}██████${AnsiColor.BRIGHT_BLUE}████████████${AnsiColor.BLACK}██████${AnsiColor.BRIGHT_BLUE}████${AnsiColor.BLACK}██████${AnsiColor.BRIGHT_BLUE}████████████ 21 | ████████████████████████████████████████████████████████████████████████████████ 22 | ${AnsiColor.BRIGHT_BLUE}:: Meow :: Running Spring Boot ${spring-boot.version} :: \ö/${AnsiColor.BLACK} -------------------------------------------------------------------------------- /src/test/java/de/olivergierke/examples/spring5/reactor/ReactorSample.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2017 the original author or authors. 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package de.olivergierke.examples.spring5.reactor; 17 | 18 | import reactor.core.publisher.Flux; 19 | import reactor.core.publisher.Mono; 20 | 21 | import org.junit.Test; 22 | 23 | /** 24 | * @author Oliver Gierke 25 | */ 26 | public class ReactorSample { 27 | 28 | @Test 29 | public void reactorFundamentals() { 30 | 31 | Mono.just("Hello") // 32 | .map(word -> word.concat(" World!")) // 33 | .subscribe(System.out::println); 34 | 35 | Flux.just("Hello", "World") // 36 | .flatMap(word -> Flux.fromArray(word.split(""))) // 37 | .subscribe(System.out::println); 38 | } 39 | } 40 | --------------------------------------------------------------------------------