├── .gitignore
├── README.md
├── build.gradle.kts
├── gradle.properties
├── gradle
    └── wrapper
    │   ├── gradle-wrapper.jar
    │   └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
├── settings.gradle
└── src
    ├── main
        ├── kotlin
        │   └── functional
        │   │   ├── app
        │   │       ├── Application.kt
        │   │       ├── Extensions.kt
        │   │       ├── Model.kt
        │   │       └── web
        │   │       │   ├── Routes.kt
        │   │       │   ├── UserHandler.kt
        │   │       │   └── view
        │   │       │       ├── MustacheResourceTemplateLoader.kt
        │   │       │       ├── MustacheView.kt
        │   │       │       └── MustacheViewResolver.kt
        │   │   └── dsl
        │   │       ├── WebServer.kt
        │   │       └── WebfluxApplicationDsl.kt
        └── resources
        │   ├── logback.xml
        │   ├── messages.properties
        │   ├── static
        │       ├── spring.png
        │       └── sse.js
        │   └── templates
        │       ├── footer.mustache
        │       ├── header.mustache
        │       ├── index.mustache
        │       ├── sse.mustache
        │       └── users.mustache
    └── test
        ├── kotlin
            └── functional
            │   └── app
            │       └── IntegrationTests.kt
        └── resources
            └── junit-platform.properties


/.gitignore:
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1 | .idea/
2 | .gradle/
3 | out/
4 | build/
5 | .idea/
6 | *.iml
7 | 
8 | 


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/README.md:
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 1 | 
 2 | # Kotlin dsl to start standalone Spring WebFlux Application
 3 | 
 4 | This project is based on https://github.com/sdeleuze/spring-kotlin-functional
 5 | 
 6 | The Main idea of this project is to provide a beautiful DSL to start a Spring Application on netty :
 7 |  - Simple DSL
 8 |  - No Annotation
 9 |  - No JavaConfig
10 |  - No Classpath Scanning
11 |  
12 | Application dsl sample : 
13 | 
14 | ```kotlin
15 | fun main(args: Array<String>) {
16 |     webfluxApplication(Server.NETTY) { // or TOMCAT
17 |     
18 |         // group routers
19 |         routes {
20 |             router { routerApi(ref()) }
21 |             router(routerStatic())
22 |         }
23 |         router { routerHtml(ref(), ref()) }
24 |     
25 |         // group beans
26 |         beans {
27 |             bean<UserHandler>()
28 |             bean<Baz>()  // Primary constructor injection
29 |         }
30 |         bean<Bar>()
31 |     
32 |         mustacheTemplate()
33 |     
34 |         profile("foo") {
35 |             bean<Foo>()
36 |         }
37 |     }.run()
38 | }
39 | ```
40 |  
41 | This project use : 
42 |  - Spring WebFlux Reactive web server and client
43 |  - [Spring Kotlin support](https://spring.io/blog/2017/01/04/introducing-kotlin-support-in-spring-framework-5-0)
44 |  - Reactor Kotlin
45 |  - [Functional bean definition with Kotlin DSL](https://github.com/sdeleuze/spring-kotlin-functional/blob/master/src/main/kotlin/functional/Beans.kt) (no reflection, no CGLIB proxies involved)
46 |  - [WebFlux functional routing declaration with Kotlin DSL](https://github.com/sdeleuze/spring-kotlin-functional/blob/master/src/main/kotlin/functional/web/Routes.kt)
47 |  - WebFlux and Reactor Netty native embedded server capabilities
48 |  - [Gradle Kotlin DSL](https://github.com/gradle/kotlin-dsl)
49 |  - [Junit 5 `@BeforeAll` and `@AfterAll` on non-static methods in Kotlin](https://github.com/sdeleuze/spring-kotlin-functional/blob/master/src/test/kotlin/functional/IntegrationTests.kt)
50 |  
51 |  
52 | Current `master` branch is based on standalone WebFlux runtime. Spring Boot is based
53 | on JavaConfig and does not provide specific support functional bean definition yet (see
54 | [this issue](https://github.com/spring-projects/spring-boot/issues/8115) where this is discussed).
55 | That said, it is possible to use experimentally Spring Boot + functional bean definition together
56 | via `ApplicationContextInitializer`, see
57 | [this Spring Boot branch](https://github.com/sdeleuze/spring-kotlin-functional/tree/boot)
58 | for a concrete example.
59 |  
60 | Build the project and run tests with `./gradlew build`, create the executable JAR via `./gradlew shadowJar`, and run it via `java -jar build/libs/spring-kotlin-functional-1.0.0-SNAPSHOT-all.jar`.
61 | 


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/build.gradle.kts:
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 1 | import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 2 | 
 3 | plugins {
 4 | 	application
 5 |     id("org.jetbrains.kotlin.jvm") version "1.1.51"
 6 | 	id ("com.github.johnrengelman.plugin-shadow") version "2.0.0"
 7 | 	id ("io.spring.dependency-management") version "1.0.3.RELEASE"
 8 | }
 9 | 
10 | buildscript {
11 | 	repositories {
12 | 		jcenter()
13 | 		mavenCentral()
14 | 	}
15 | 
16 | 	dependencies {
17 | 		classpath("org.junit.platform:junit-platform-gradle-plugin:1.0.0")
18 | 	}
19 | }
20 | 
21 | apply {
22 | 	plugin("org.junit.platform.gradle.plugin")
23 | }
24 | 
25 | repositories {
26 | 	jcenter()
27 | 	mavenCentral()
28 | 	maven("https://repo.spring.io/milestone")
29 | }
30 | 
31 | application {
32 | 	mainClassName = "functional.ApplicationKt"
33 | }
34 | 
35 | tasks {
36 | 	withType<KotlinCompile> {
37 | 		kotlinOptions {
38 | 			jvmTarget = "1.8"
39 | 			freeCompilerArgs = listOf("-Xjsr305=strict")
40 | 		}
41 | 	}
42 | }
43 | 
44 | dependencyManagement {
45 | 	imports {
46 | 		mavenBom("org.springframework.boot:spring-boot-dependencies:2.0.0.M5")
47 | 	}
48 | }
49 | 
50 | dependencies {
51 | 	compile("org.jetbrains.kotlin:kotlin-stdlib-jre8")
52 | 	compile("org.jetbrains.kotlin:kotlin-reflect")
53 | 
54 | 	compile("org.springframework:spring-webflux")
55 |     compile("org.springframework:spring-context") {
56 | 		exclude(module = "spring-aop")
57 | 	}
58 | 	compile("org.apache.tomcat.embed:tomcat-embed-core")
59 | 	compile("io.projectreactor.ipc:reactor-netty")
60 | 	compile("com.samskivert:jmustache")
61 | 
62 | 	compile("org.slf4j:slf4j-api")
63 | 	compile("ch.qos.logback:logback-classic")
64 | 
65 | 	compile("com.fasterxml.jackson.module:jackson-module-kotlin")
66 | 	compile("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
67 | 
68 | 	testCompile("io.projectreactor:reactor-test")
69 | 
70 | 	testCompile("org.junit.jupiter:junit-jupiter-api")
71 | 	testRuntime("org.junit.jupiter:junit-jupiter-engine")
72 | }
73 | 


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/gradle.properties:
--------------------------------------------------------------------------------
1 | org.gradle.script.lang.kotlin.accessors.auto=true
2 | group=io.spring
3 | version=1.0.0-SNAPSHOT
4 | 
5 | kotlinVersion=1.1.51


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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/tgirard12/spring-webflux-kotlin-dsl/cab4c0bb83d2c7dd08242eb80e69c179ef766aa2/gradle/wrapper/gradle-wrapper.jar


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/gradle/wrapper/gradle-wrapper.properties:
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1 | distributionBase=GRADLE_USER_HOME
2 | distributionPath=wrapper/dists
3 | zipStoreBase=GRADLE_USER_HOME
4 | zipStorePath=wrapper/dists
5 | distributionUrl=https\://services.gradle.org/distributions/gradle-4.2-bin.zip
6 | 


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/gradlew:
--------------------------------------------------------------------------------
  1 | #!/usr/bin/env sh
  2 | 
  3 | ##############################################################################
  4 | ##
  5 | ##  Gradle start up script for UN*X
  6 | ##
  7 | ##############################################################################
  8 | 
  9 | # Attempt to set APP_HOME
 10 | # Resolve links: $0 may be a link
 11 | PRG="$0"
 12 | # Need this for relative symlinks.
 13 | while [ -h "$PRG" ] ; do
 14 |     ls=`ls -ld "$PRG"`
 15 |     link=`expr "$ls" : '.*-> \(.*\)$'`
 16 |     if expr "$link" : '/.*' > /dev/null; then
 17 |         PRG="$link"
 18 |     else
 19 |         PRG=`dirname "$PRG"`"/$link"
 20 |     fi
 21 | done
 22 | SAVED="`pwd`"
 23 | cd "`dirname \"$PRG\"`/" >/dev/null
 24 | APP_HOME="`pwd -P`"
 25 | cd "$SAVED" >/dev/null
 26 | 
 27 | APP_NAME="Gradle"
 28 | APP_BASE_NAME=`basename "$0"`
 29 | 
 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 31 | DEFAULT_JVM_OPTS=""
 32 | 
 33 | # Use the maximum available, or set MAX_FD != -1 to use that value.
 34 | MAX_FD="maximum"
 35 | 
 36 | warn () {
 37 |     echo "$*"
 38 | }
 39 | 
 40 | die () {
 41 |     echo
 42 |     echo "$*"
 43 |     echo
 44 |     exit 1
 45 | }
 46 | 
 47 | # OS specific support (must be 'true' or 'false').
 48 | cygwin=false
 49 | msys=false
 50 | darwin=false
 51 | nonstop=false
 52 | case "`uname`" in
 53 |   CYGWIN* )
 54 |     cygwin=true
 55 |     ;;
 56 |   Darwin* )
 57 |     darwin=true
 58 |     ;;
 59 |   MINGW* )
 60 |     msys=true
 61 |     ;;
 62 |   NONSTOP* )
 63 |     nonstop=true
 64 |     ;;
 65 | esac
 66 | 
 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 68 | 
 69 | # Determine the Java command to use to start the JVM.
 70 | if [ -n "$JAVA_HOME" ] ; then
 71 |     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
 72 |         # IBM's JDK on AIX uses strange locations for the executables
 73 |         JAVACMD="$JAVA_HOME/jre/sh/java"
 74 |     else
 75 |         JAVACMD="$JAVA_HOME/bin/java"
 76 |     fi
 77 |     if [ ! -x "$JAVACMD" ] ; then
 78 |         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 79 | 
 80 | Please set the JAVA_HOME variable in your environment to match the
 81 | location of your Java installation."
 82 |     fi
 83 | else
 84 |     JAVACMD="java"
 85 |     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 86 | 
 87 | Please set the JAVA_HOME variable in your environment to match the
 88 | location of your Java installation."
 89 | fi
 90 | 
 91 | # Increase the maximum file descriptors if we can.
 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
 93 |     MAX_FD_LIMIT=`ulimit -H -n`
 94 |     if [ $? -eq 0 ] ; then
 95 |         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
 96 |             MAX_FD="$MAX_FD_LIMIT"
 97 |         fi
 98 |         ulimit -n $MAX_FD
 99 |         if [ $? -ne 0 ] ; then
100 |             warn "Could not set maximum file descriptor limit: $MAX_FD"
101 |         fi
102 |     else
103 |         warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
104 |     fi
105 | fi
106 | 
107 | # For Darwin, add options to specify how the application appears in the dock
108 | if $darwin; then
109 |     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
110 | fi
111 | 
112 | # For Cygwin, switch paths to Windows format before running java
113 | if $cygwin ; then
114 |     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
115 |     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
116 |     JAVACMD=`cygpath --unix "$JAVACMD"`
117 | 
118 |     # We build the pattern for arguments to be converted via cygpath
119 |     ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 |     SEP=""
121 |     for dir in $ROOTDIRSRAW ; do
122 |         ROOTDIRS="$ROOTDIRS$SEP$dir"
123 |         SEP="|"
124 |     done
125 |     OURCYGPATTERN="(^($ROOTDIRS))"
126 |     # Add a user-defined pattern to the cygpath arguments
127 |     if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 |         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 |     fi
130 |     # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 |     i=0
132 |     for arg in "$@" ; do
133 |         CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 |         CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
135 | 
136 |         if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
137 |             eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 |         else
139 |             eval `echo args$i`="\"$arg\""
140 |         fi
141 |         i=$((i+1))
142 |     done
143 |     case $i in
144 |         (0) set -- ;;
145 |         (1) set -- "$args0" ;;
146 |         (2) set -- "$args0" "$args1" ;;
147 |         (3) set -- "$args0" "$args1" "$args2" ;;
148 |         (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 |         (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 |         (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 |         (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 |         (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 |         (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 |     esac
155 | fi
156 | 
157 | # Escape application args
158 | save () {
159 |     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
160 |     echo " "
161 | }
162 | APP_ARGS=$(save "$@")
163 | 
164 | # Collect all arguments for the java command, following the shell quoting and substitution rules
165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
166 | 
167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
169 |   cd "$(dirname "$0")"
170 | fi
171 | 
172 | exec "$JAVACMD" "$@"
173 | 


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/gradlew.bat:
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 1 | @if "%DEBUG%" == "" @echo off
 2 | @rem ##########################################################################
 3 | @rem
 4 | @rem  Gradle startup script for Windows
 5 | @rem
 6 | @rem ##########################################################################
 7 | 
 8 | @rem Set local scope for the variables with windows NT shell
 9 | if "%OS%"=="Windows_NT" setlocal
10 | 
11 | set DIRNAME=%~dp0
12 | if "%DIRNAME%" == "" set DIRNAME=.
13 | set APP_BASE_NAME=%~n0
14 | set APP_HOME=%DIRNAME%
15 | 
16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
17 | set DEFAULT_JVM_OPTS=
18 | 
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 | 
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 | 
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 | 
32 | goto fail
33 | 
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 | 
38 | if exist "%JAVA_EXE%" goto init
39 | 
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 | 
46 | goto fail
47 | 
48 | :init
49 | @rem Get command-line arguments, handling Windows variants
50 | 
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | 
53 | :win9xME_args
54 | @rem Slurp the command line arguments.
55 | set CMD_LINE_ARGS=
56 | set _SKIP=2
57 | 
58 | :win9xME_args_slurp
59 | if "x%~1" == "x" goto execute
60 | 
61 | set CMD_LINE_ARGS=%*
62 | 
63 | :execute
64 | @rem Setup the command line
65 | 
66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
67 | 
68 | @rem Execute Gradle
69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
70 | 
71 | :end
72 | @rem End local scope for the variables with windows NT shell
73 | if "%ERRORLEVEL%"=="0" goto mainEnd
74 | 
75 | :fail
76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
77 | rem the _cmd.exe /c_ return code!
78 | if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
79 | exit /b 1
80 | 
81 | :mainEnd
82 | if "%OS%"=="Windows_NT" endlocal
83 | 
84 | :omega
85 | 


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/settings.gradle:
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https://raw.githubusercontent.com/tgirard12/spring-webflux-kotlin-dsl/cab4c0bb83d2c7dd08242eb80e69c179ef766aa2/settings.gradle


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/src/main/kotlin/functional/app/Application.kt:
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 1 | package functional.app
 2 | 
 3 | import functional.app.web.UserHandler
 4 | import functional.app.web.routerApi
 5 | import functional.app.web.routerHtml
 6 | import functional.app.web.routerStatic
 7 | import functional.dsl.Server
 8 | import functional.dsl.webfluxApplication
 9 | 
10 | val application = webfluxApplication(Server.NETTY) { // or TOMCAT
11 | 
12 |     // group routers
13 |     routes {
14 |         router { routerApi(ref()) }
15 |         router(routerStatic())
16 |     }
17 |     router { routerHtml(ref(), ref()) }
18 | 
19 |     // group beans
20 |     beans {
21 |         bean<UserHandler>()
22 |         bean<Baz>()  // Primary constructor injection
23 |     }
24 |     bean<Bar>()
25 | 
26 |     mustacheTemplate()
27 | 
28 |     profile("foo") {
29 |         bean<Foo>()
30 |     }
31 | }
32 | 
33 | 
34 | fun main(args: Array<String>) {
35 |     application.run()
36 | }
37 | 
38 | // Only for profile:"foo"
39 | class Foo
40 | 
41 | class Bar
42 | class Baz(val bar: Bar)
43 | 


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/src/main/kotlin/functional/app/Extensions.kt:
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 1 | package functional.app
 2 | 
 3 | import org.springframework.web.reactive.function.server.ServerRequest
 4 | import java.time.LocalDate
 5 | import java.time.format.DateTimeFormatterBuilder
 6 | import java.time.temporal.ChronoField
 7 | import java.util.*
 8 | import java.util.stream.Collectors
 9 | import java.util.stream.IntStream
10 | 
11 | fun ServerRequest.locale() =
12 | 		this.headers().asHttpHeaders().acceptLanguageAsLocales.firstOrNull() ?: Locale.ENGLISH
13 | 
14 | fun LocalDate.formatDate(): String = this.format(englishDateFormatter)
15 | 
16 | private val daysLookup: Map<Long, String> =
17 | 		IntStream.rangeClosed(1, 31).boxed().collect(Collectors.toMap(Int::toLong, ::getOrdinal))
18 | 
19 | private val englishDateFormatter = DateTimeFormatterBuilder()
20 | 		.appendPattern("MMMM")
21 | 		.appendLiteral(" ")
22 | 		.appendText(ChronoField.DAY_OF_MONTH, daysLookup)
23 | 		.appendLiteral(" ")
24 | 		.appendPattern("yyyy")
25 | 		.toFormatter(Locale.ENGLISH)
26 | 
27 | private fun getOrdinal(n: Int) =
28 | 		when {
29 | 			n in 11..13 -> "${n}th"
30 | 			n % 10 == 1 -> "${n}st"
31 | 			n % 10 == 2 -> "${n}nd"
32 | 			n % 10 == 3 -> "${n}rd"
33 | 			else -> "${n}th"
34 | 		}


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/src/main/kotlin/functional/app/Model.kt:
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1 | package functional.app
2 | 
3 | import java.time.LocalDate
4 | 
5 | data class User(val firstName: String, val lastName: String, val birthDate: LocalDate)


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/src/main/kotlin/functional/app/web/Routes.kt:
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 1 | package functional.app.web
 2 | 
 3 | import com.samskivert.mustache.Mustache
 4 | import functional.app.locale
 5 | import org.springframework.context.MessageSource
 6 | import org.springframework.core.io.ClassPathResource
 7 | import org.springframework.http.MediaType.*
 8 | import org.springframework.web.reactive.function.server.RenderingResponse
 9 | import org.springframework.web.reactive.function.server.ServerResponse.ok
10 | import org.springframework.web.reactive.function.server.router
11 | import reactor.core.publisher.toMono
12 | import java.util.*
13 | 
14 | fun routerStatic() = router {
15 |     resources("/**", ClassPathResource("static/"))
16 | }
17 | 
18 | fun routerApi(userHandler: UserHandler) = router {
19 |     "/api".nest {
20 |         accept(APPLICATION_JSON).nest {
21 |             GET("/users", userHandler::findAll)
22 |         }
23 |         accept(TEXT_EVENT_STREAM).nest {
24 |             GET("/users", userHandler::stream)
25 |         }
26 |     }
27 | }
28 | 
29 | fun routerHtml(userHandler: UserHandler, messageSource: MessageSource) = router {
30 |     accept(TEXT_HTML).nest {
31 |         GET("/") { ok().render("index") }
32 |         GET("/sse") { ok().render("sse") }
33 |         GET("/users", userHandler::findAllView)
34 |     }
35 |     resources("/**", ClassPathResource("static/"))
36 | }.filter { request, next ->
37 |     next.handle(request).flatMap {
38 |         if (it is RenderingResponse) RenderingResponse.from(it).modelAttributes(attributes(request.locale(), messageSource)).build() else it.toMono()
39 |     }
40 | }
41 | 
42 | private fun attributes(locale: Locale, messageSource: MessageSource) = mutableMapOf<String, Any>(
43 |         "i18n" to Mustache.Lambda { frag, out ->
44 |             val tokens = frag.execute().split("|")
45 |             out.write(messageSource.getMessage(tokens[0], tokens.slice(IntRange(1, tokens.size - 1)).toTypedArray(), locale))
46 |         })


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/src/main/kotlin/functional/app/web/UserHandler.kt:
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 1 | package functional.app.web
 2 | 
 3 | import functional.app.User
 4 | import functional.app.formatDate
 5 | import org.springframework.web.reactive.function.server.ServerRequest
 6 | import org.springframework.web.reactive.function.server.ServerResponse.ok
 7 | import org.springframework.web.reactive.function.server.body
 8 | import org.springframework.web.reactive.function.server.bodyToServerSentEvents
 9 | import reactor.core.publisher.Flux
10 | import java.time.Duration
11 | import java.time.LocalDate
12 | 
13 | @Suppress("UNUSED_PARAMETER")
14 | class UserHandler {
15 | 	
16 | 	private val users = Flux.just(
17 |             User("Foo", "Foo", LocalDate.now().minusDays(1)),
18 |             User("Bar", "Bar", LocalDate.now().minusDays(10)),
19 |             User("Baz", "Baz", LocalDate.now().minusDays(100)))
20 | 	
21 | 	private val userStream = Flux
22 | 			.zip(Flux.interval(Duration.ofMillis(100)), users.repeat())
23 | 			.map { it.t2 }
24 | 
25 | 	fun findAll(req: ServerRequest) =
26 | 			ok().body(users)
27 | 
28 | 	fun findAllView(req: ServerRequest) =
29 | 			ok().render("users", mapOf("users" to users.map { it.toDto() }))
30 | 	
31 | 	fun stream(req: ServerRequest) =
32 | 			ok().bodyToServerSentEvents(userStream)
33 | 	
34 | }
35 | 
36 | class UserDto(val firstName: String, val lastName: String, val birthDate: String)
37 | 
38 | fun User.toDto() = UserDto(firstName, lastName, birthDate.formatDate())


--------------------------------------------------------------------------------
/src/main/kotlin/functional/app/web/view/MustacheResourceTemplateLoader.kt:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2002-2017 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 functional.app.web.view
17 | 
18 | 
19 | import com.samskivert.mustache.Mustache
20 | import com.samskivert.mustache.Mustache.Compiler
21 | import com.samskivert.mustache.Mustache.TemplateLoader
22 | import org.springframework.context.ResourceLoaderAware
23 | import org.springframework.core.io.DefaultResourceLoader
24 | import org.springframework.core.io.Resource
25 | import org.springframework.core.io.ResourceLoader
26 | import java.io.InputStreamReader
27 | import java.io.Reader
28 | 
29 | /**
30 |  * Mustache TemplateLoader implementation that uses a prefix, suffix and the Spring
31 |  * Resource abstraction to load a template from a file, classpath, URL etc. A
32 |  * [TemplateLoader] is needed in the [Compiler] when you want to render
33 |  * partials (i.e. tiles-like features).
34 | 
35 |  * @author Dave Syer
36 |  * @since 1.2.2
37 |  * @see Mustache
38 |  * @see Resource
39 |  */
40 | class MustacheResourceTemplateLoader(private val prefix: String, private val suffix: String) : TemplateLoader, ResourceLoaderAware {
41 | 
42 | 	private var charSet = "UTF-8"
43 | 
44 | 	private var resourceLoader: ResourceLoader = DefaultResourceLoader()
45 | 
46 | 	/**
47 | 	 * Set the charset.
48 | 	 * @param charSet the charset
49 | 	 */
50 | 	fun setCharset(charSet: String) {
51 | 		this.charSet = charSet
52 | 	}
53 | 
54 | 	/**
55 | 	 * Set the resource loader.
56 | 	 * @param resourceLoader the resource loader
57 | 	 */
58 | 	override fun setResourceLoader(resourceLoader: ResourceLoader) {
59 | 		this.resourceLoader = resourceLoader
60 | 	}
61 | 	
62 | 	override fun getTemplate(name: String): Reader {
63 | 		return InputStreamReader(this.resourceLoader
64 | 				.getResource(this.prefix + name + this.suffix).inputStream,
65 | 				this.charSet)
66 | 	}
67 | 
68 | }


--------------------------------------------------------------------------------
/src/main/kotlin/functional/app/web/view/MustacheView.kt:
--------------------------------------------------------------------------------
  1 | /*
  2 |  * Copyright 2012-2017 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 | 
 17 | package functional.app.web.view
 18 | 
 19 | import com.samskivert.mustache.Mustache.Compiler
 20 | import org.springframework.core.io.Resource
 21 | import org.springframework.http.MediaType
 22 | import org.springframework.web.reactive.result.view.AbstractUrlBasedView
 23 | import org.springframework.web.reactive.result.view.View
 24 | import org.springframework.web.server.ServerWebExchange
 25 | import reactor.core.publisher.Flux
 26 | import reactor.core.publisher.Mono
 27 | import java.io.InputStreamReader
 28 | import java.io.OutputStreamWriter
 29 | import java.io.Reader
 30 | import java.nio.charset.Charset
 31 | import java.util.*
 32 | 
 33 | /**
 34 |  * Spring WebFlux [View] using the Mustache template engine.
 35 |  * @author Brian Clozel
 36 |  * @author Sebastien Deleuze
 37 |  */
 38 | class MustacheView : AbstractUrlBasedView() {
 39 | 
 40 | 	private var compiler: Compiler? = null
 41 | 
 42 | 	private var charset: String? = null
 43 | 
 44 | 	/**
 45 | 	 * Set the JMustache compiler to be used by this view. Typically this property is not
 46 | 	 * set directly. Instead a single [Compiler] is expected in the Spring
 47 | 	 * application context which is used to compile Mustache templates.
 48 | 	 * @param compiler the Mustache compiler
 49 | 	 */
 50 | 	fun setCompiler(compiler: Compiler) {
 51 | 		this.compiler = compiler
 52 | 	}
 53 | 
 54 | 	/**
 55 | 	 * Set the charset used for reading Mustache template files.
 56 | 	 * @param charset the charset to use for reading template files
 57 | 	 */
 58 | 	fun setCharset(charset: String) {
 59 | 		this.charset = charset
 60 | 	}
 61 | 
 62 | 	@Throws(Exception::class)
 63 | 	override fun checkResourceExists(locale: Locale): Boolean {
 64 | 		return resolveResource() != null
 65 | 	}
 66 | 
 67 | 	override fun renderInternal(model: Map<String, Any>, contentType: MediaType?,
 68 | 								exchange: ServerWebExchange): Mono<Void> {
 69 | 		val resource = resolveResource() ?: return Mono.error(IllegalStateException("Could not find Mustache template with URL [$url]"))
 70 | 		val dataBuffer = exchange.response.bufferFactory().allocateBuffer()
 71 | 		try {
 72 | 			getReader(resource).use { reader ->
 73 | 				val template = this.compiler!!.compile(reader)
 74 | 				val charset = getCharset(contentType).orElse(defaultCharset)
 75 | 				OutputStreamWriter(dataBuffer.asOutputStream(),
 76 | 						charset).use { writer ->
 77 | 					template.execute(model, writer)
 78 | 					writer.flush()
 79 | 				}
 80 | 			}
 81 | 		} catch (ex: Throwable) {
 82 | 			return Mono.error<Void>(ex)
 83 | 		}
 84 | 
 85 | 		return exchange.response.writeWith(Flux.just(dataBuffer))
 86 | 	}
 87 | 
 88 | 	private fun resolveResource(): Resource? {
 89 | 		val resource = applicationContext!!.getResource(url!!)
 90 | 		if (!resource.exists()) {
 91 | 			return null
 92 | 		}
 93 | 		return resource
 94 | 	}
 95 | 	
 96 | 	private fun getReader(resource: Resource): Reader {
 97 | 		if (this.charset != null) {
 98 | 			return InputStreamReader(resource.inputStream, this.charset!!)
 99 | 		}
100 | 		return InputStreamReader(resource.inputStream)
101 | 	}
102 | 
103 | 	private fun getCharset(mediaType: MediaType?): Optional<Charset> {
104 | 		return Optional.ofNullable(mediaType?.charset)
105 | 	}
106 | 
107 | }
108 | 


--------------------------------------------------------------------------------
/src/main/kotlin/functional/app/web/view/MustacheViewResolver.kt:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2012-2017 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 | 
17 | package functional.app.web.view
18 | 
19 | import com.samskivert.mustache.Mustache
20 | import com.samskivert.mustache.Mustache.Compiler
21 | 
22 | import org.springframework.web.reactive.result.view.AbstractUrlBasedView
23 | import org.springframework.web.reactive.result.view.UrlBasedViewResolver
24 | import org.springframework.web.reactive.result.view.ViewResolver
25 | 
26 | /**
27 |  * Spring WebFlux [ViewResolver] for Mustache.
28 |  * @author Brian Clozel
29 |  * @author Sebastien Deleuze
30 |  */
31 | class MustacheViewResolver(private val compiler: Compiler = Mustache.compiler()) : UrlBasedViewResolver() {
32 | 
33 | 	private var charset: String? = null
34 | 
35 | 	init {
36 | 		viewClass = requiredViewClass()
37 | 	}
38 | 
39 | 	/**
40 | 	 * Set the charset.
41 | 	 * @param charset the charset
42 | 	 */
43 | 	fun setCharset(charset: String) {
44 | 		this.charset = charset
45 | 	}
46 | 
47 | 	override fun requiredViewClass(): Class<*> {
48 | 		return MustacheView::class.java
49 | 	}
50 | 
51 | 	override fun createView(viewName: String): AbstractUrlBasedView {
52 | 		val view = super.createView(viewName) as MustacheView
53 | 		view.setCompiler(this.compiler)
54 | 		this.charset?.let { view.setCharset(it) }
55 | 		return view
56 | 	}
57 | 
58 | }
59 | 


--------------------------------------------------------------------------------
/src/main/kotlin/functional/dsl/WebServer.kt:
--------------------------------------------------------------------------------
 1 | package functional.dsl
 2 | 
 3 | import org.apache.catalina.connector.Connector
 4 | import org.apache.catalina.core.StandardContext
 5 | import org.apache.catalina.loader.WebappClassLoader
 6 | import org.apache.catalina.loader.WebappLoader
 7 | import org.apache.catalina.startup.Tomcat
 8 | import org.springframework.http.server.reactive.HttpHandler
 9 | import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter
10 | import org.springframework.http.server.reactive.TomcatHttpHandlerAdapter
11 | import org.springframework.util.ClassUtils
12 | import reactor.ipc.netty.http.server.HttpServer
13 | import reactor.ipc.netty.tcp.BlockingNettyContext
14 | 
15 | 
16 | /**
17 |  * List of supported server
18 |  */
19 | enum class Server {
20 |     NETTY, TOMCAT
21 | }
22 | 
23 | /**
24 |  * Common server implementation
25 |  */
26 | interface WebServer {
27 | 
28 |     var port: Int
29 |     fun run(httpHandler: HttpHandler, await: Boolean = true)
30 |     fun stop()
31 | }
32 | 
33 | /**
34 |  * Netty
35 |  */
36 | class NettyWebServer : WebServer {
37 | 
38 |     override var port: Int = 8080
39 |     private val server: HttpServer by lazy { HttpServer.create(port) }
40 |     private lateinit var nettyContext: BlockingNettyContext
41 | 
42 |     override fun run(httpHandler: HttpHandler, await: Boolean) {
43 |         if (await)
44 |             server.startAndAwait(ReactorHttpHandlerAdapter(httpHandler), { nettyContext = it })
45 |         else
46 |             nettyContext = server.start(ReactorHttpHandlerAdapter(httpHandler))
47 |     }
48 | 
49 |     override fun stop() {
50 |         nettyContext.shutdown()
51 |     }
52 | }
53 | 
54 | /**
55 |  * Tomcat
56 |  */
57 | class TomcatWebServer : WebServer {
58 | 
59 |     override var port: Int = 8080
60 |     val tomcat = Tomcat()
61 | 
62 |     override fun run(httpHandler: HttpHandler, await: Boolean) {
63 | 
64 |         val servlet = TomcatHttpHandlerAdapter(httpHandler)
65 | 
66 |         val docBase = createTempDir("tomcat-docbase")
67 |         val context = StandardContext()
68 |         context.path = ""
69 |         context.docBase = docBase.absolutePath
70 |         context.addLifecycleListener(Tomcat.FixContextListener())
71 |         context.parentClassLoader = ClassUtils.getDefaultClassLoader()
72 |         val loader = WebappLoader(context.parentClassLoader)
73 |         loader.loaderClass = WebappClassLoader::class.java.name
74 |         loader.delegate = true
75 |         context.loader = loader
76 | 
77 |         Tomcat.addServlet(context, "httpHandlerServlet", servlet)
78 |         context.addServletMappingDecoded("/", "httpHandlerServlet")
79 |         tomcat.host.addChild(context)
80 | 
81 |         val baseDir = createTempDir("tomcat")
82 |         tomcat.setBaseDir(baseDir.absolutePath)
83 |         val connector = Connector("org.apache.coyote.http11.Http11NioProtocol")
84 |         tomcat.service.addConnector(connector)
85 |         connector.setProperty("bindOnInit", "false")
86 |         connector.port = port
87 |         tomcat.connector = connector
88 |         tomcat.host.autoDeploy = false
89 | 
90 |         tomcat.server.start()
91 |         if (await)
92 |             tomcat.server.await()
93 |     }
94 | 
95 |     override fun stop() {
96 |         tomcat.stop()
97 |     }
98 | }


--------------------------------------------------------------------------------
/src/main/kotlin/functional/dsl/WebfluxApplicationDsl.kt:
--------------------------------------------------------------------------------
  1 | package functional.dsl
  2 | 
  3 | import com.samskivert.mustache.Mustache
  4 | import functional.app.web.view.MustacheResourceTemplateLoader
  5 | import functional.app.web.view.MustacheViewResolver
  6 | import org.springframework.context.support.BeanDefinitionDsl
  7 | import org.springframework.context.support.GenericApplicationContext
  8 | import org.springframework.context.support.ReloadableResourceBundleMessageSource
  9 | import org.springframework.http.server.reactive.HttpHandler
 10 | import org.springframework.web.reactive.function.server.HandlerStrategies
 11 | import org.springframework.web.reactive.function.server.RouterFunction
 12 | import org.springframework.web.reactive.function.server.RouterFunctions
 13 | import org.springframework.web.reactive.function.server.ServerResponse
 14 | import org.springframework.web.server.adapter.WebHttpHandlerBuilder
 15 | 
 16 | 
 17 | class WebfluxApplicationDsl : BeanDefinitionDsl() {
 18 | 
 19 |     // Configuration
 20 |     private var port = 8080
 21 |     private var server: Server = Server.NETTY
 22 |     private var hasViewResolver: Boolean = false
 23 | 
 24 |     // Spring App
 25 |     private val context: GenericApplicationContext by lazy {
 26 |         GenericApplicationContext().apply {
 27 |             initialize(this)
 28 |             webHandler.initialize(this)
 29 |             messageSource.initialize(this)
 30 |             routes.initialize(this)
 31 |             refresh()
 32 |         }
 33 |     }
 34 |     private val httpHandler: HttpHandler by lazy { WebHttpHandlerBuilder.applicationContext(context).build() }
 35 |     private lateinit var webServer: WebServer
 36 | 
 37 |     // Beans
 38 |     private val beanDsl: BeanDefinitionDsl = BeanDefinitionDsl()
 39 |     private val routesDsl: RoutesDsl = RoutesDsl()
 40 |     private val routes = beans {
 41 |         bean {
 42 |             routesDsl.merge(this)
 43 |         }
 44 |     }
 45 |     private val webHandler = beans {
 46 |         bean("webHandler") {
 47 |             RouterFunctions.toWebHandler(ref(), HandlerStrategies.builder().apply {
 48 |                 if (hasViewResolver) viewResolver(ref())
 49 |             }.build())
 50 |         }
 51 |     }
 52 |     private val messageSource = beans {
 53 |         bean("messageSource") {
 54 |             ReloadableResourceBundleMessageSource().apply {
 55 |                 setBasename("messages")
 56 |                 setDefaultEncoding("UTF-8")
 57 |             }
 58 |         }
 59 |     }
 60 | 
 61 |     fun run(await: Boolean = true, port: Int = this.port) {
 62 |         this.port = port
 63 | 
 64 |         when (server) {
 65 |             Server.NETTY -> webServer = NettyWebServer()
 66 |             Server.TOMCAT -> webServer = TomcatWebServer()
 67 |         }
 68 |         webServer.port = this.port
 69 |         webServer.run(httpHandler, await)
 70 |     }
 71 | 
 72 |     fun stop() {
 73 |         webServer.stop()
 74 |     }
 75 | 
 76 |     // Routes
 77 |     fun routes(f: RoutesDsl.() -> Unit) = routesDsl.apply(f)
 78 | 
 79 |     fun router(router: RouterFunction<ServerResponse>) = routesDsl.router(router)
 80 |     fun router(f: BeanDefinitionDsl.BeanDefinitionContext.() -> RouterFunction<ServerResponse>) = routesDsl.router(f)
 81 | 
 82 |     // Beans
 83 |     fun beans(f: BeanDefinitionDsl.() -> Unit) = beanDsl.apply { f() }
 84 | 
 85 |     // Mustache
 86 |     fun mustacheTemplate(prefix: String = "classpath:/templates/",
 87 |                          suffix: String = ".mustache",
 88 |                          f: MustacheViewResolver.() -> Unit = {}) {
 89 |         bean {
 90 |             hasViewResolver = true
 91 |             MustacheResourceTemplateLoader(prefix, suffix).let {
 92 |                 MustacheViewResolver(Mustache.compiler().withLoader(it)).apply {
 93 |                     setPrefix(prefix)
 94 |                     setSuffix(suffix)
 95 |                     f()
 96 |                 }
 97 |             }
 98 |         }
 99 |     }
100 | 
101 |     class RoutesDsl {
102 |         private val routes = mutableListOf<BeanDefinitionDsl.BeanDefinitionContext.() -> RouterFunction<ServerResponse>>()
103 | 
104 |         fun router(router: RouterFunction<ServerResponse>) {
105 |             routes.add({ router })
106 |         }
107 | 
108 |         fun router(f: BeanDefinitionDsl.BeanDefinitionContext.() -> RouterFunction<ServerResponse>) {
109 |             routes.add(f)
110 |         }
111 | 
112 |         fun merge(f: BeanDefinitionDsl.BeanDefinitionContext): RouterFunction<ServerResponse> =
113 |                 routes.map { it.invoke(f) }.reduce(RouterFunction<ServerResponse>::and)
114 |     }
115 | }
116 | 
117 | fun webfluxApplication(server: Server, f: WebfluxApplicationDsl.() -> Unit) = WebfluxApplicationDsl().apply(f)


--------------------------------------------------------------------------------
/src/main/resources/logback.xml:
--------------------------------------------------------------------------------
 1 | <configuration>
 2 | 
 3 | 	<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
 4 | 		<encoder>
 5 | 			<pattern>
 6 | 				%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
 7 | 			</pattern>
 8 | 		</encoder>
 9 | 	</appender>
10 | 
11 | 	<logger name="reactor" level="info"/>
12 | 	<logger name="reactor.ipc.netty" level="info"/>
13 | 
14 | 	<root level="info">
15 | 		<appender-ref ref="stdout"/>
16 | 	</root>
17 | 
18 | </configuration>


--------------------------------------------------------------------------------
/src/main/resources/messages.properties:
--------------------------------------------------------------------------------
 1 | index.welcome=Welcome to this application designed to demonstrate how to build a micro-framework style application with Spring Framework 5 and Kotlin.
 2 | index.list=You can have a look to:
 3 | index.mustache=An HTML page rendered with JMustache
 4 | index.json=An JSON REST endpoint
 5 | index.sse=An HTML page using Server-Sent Events to display a stream of data
 6 | 
 7 | sse.list=User stream:
 8 | 
 9 | users.list=Users:
10 | 
11 | 


--------------------------------------------------------------------------------
/src/main/resources/static/spring.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tgirard12/spring-webflux-kotlin-dsl/cab4c0bb83d2c7dd08242eb80e69c179ef766aa2/src/main/resources/static/spring.png


--------------------------------------------------------------------------------
/src/main/resources/static/sse.js:
--------------------------------------------------------------------------------
1 | var eventSource = new EventSource("/api/users");
2 | eventSource.onmessage = function(e) {
3 |     var li = document.createElement("li");
4 |     var user = JSON.parse(e.data);
5 |     li.innerText = "User: " + user.firstName + " " + user.lastName + " - " + user.birthDate;
6 |     document.getElementById("users").appendChild(li);
7 | }


--------------------------------------------------------------------------------
/src/main/resources/templates/footer.mustache:
--------------------------------------------------------------------------------
1 |       <div class="pure-u-1-3"></div>
2 |     </div>
3 |   </body>
4 | </html>


--------------------------------------------------------------------------------
/src/main/resources/templates/header.mustache:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 |   <head>
 4 |     <title>{{#title}}{{title}}{{/title}}</title>
 5 |     <link rel="stylesheet" href="https://unpkg.com/purecss@1.0.0/build/pure-min.css" integrity="sha384-nn4HPE8lTHyVtfCBi5yW9d20FjT8BJwUXyWZT9InLYax14RDjBj46LmSztkmNP9w" crossorigin="anonymous">
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 7 |   </head>
 8 |   <body>
 9 |   <div class="pure-g">
10 |       <div class="pure-u-1-3"></div>
11 |       <div class="pure-u-1-3">
12 |           <div><img class="pure-img" src="./spring.png"></div>
13 |           <br /><br />


--------------------------------------------------------------------------------
/src/main/resources/templates/index.mustache:
--------------------------------------------------------------------------------
 1 | {{> header}}
 2 | 
 3 | <div>
 4 |   <p>{{#i18n}}index.welcome{{/i18n}}</p>
 5 | 
 6 |   {{#i18n}}index.list{{/i18n}}
 7 |   <ul>
 8 |     <li><a href="./users">{{#i18n}}index.mustache{{/i18n}}</a></li>
 9 |     <li><a href="./api/users">{{#i18n}}index.json{{/i18n}}</a></li>
10 |       <li><a href="./sse">{{#i18n}}index.sse{{/i18n}}</a></li>
11 |   </ul>
12 | </div>
13 | 
14 | {{> footer}}
15 | 


--------------------------------------------------------------------------------
/src/main/resources/templates/sse.mustache:
--------------------------------------------------------------------------------
 1 | {{> header}}
 2 | 
 3 |   <script src="sse.js"></script>
 4 | 
 5 |   {{#i18n}}sse.list{{/i18n}}
 6 |   <ul id="users">
 7 |   
 8 |   </ul>
 9 | 
10 | {{> footer}}


--------------------------------------------------------------------------------
/src/main/resources/templates/users.mustache:
--------------------------------------------------------------------------------
 1 | {{> header}}
 2 | 
 3 | {{#i18n}}users.list{{/i18n}}
 4 | <ul>
 5 | 	{{#users}}
 6 | 		<li>{{firstName}} {{lastName}} - {{birthDate}}</li>
 7 | 	{{/users}}
 8 | </ul>
 9 | 
10 | {{> footer}}
11 | 


--------------------------------------------------------------------------------
/src/test/kotlin/functional/app/IntegrationTests.kt:
--------------------------------------------------------------------------------
 1 | package functional.app
 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.http.MediaType.*
 8 | import org.springframework.web.reactive.function.client.WebClient
 9 | import org.springframework.web.reactive.function.client.bodyToFlux
10 | import org.springframework.web.reactive.function.client.bodyToMono
11 | import reactor.test.test
12 | import java.time.LocalDate
13 | 
14 | @TestInstance(TestInstance.Lifecycle.PER_CLASS)
15 | class IntegrationTests {
16 |     private val client = WebClient.create("http://localhost:8181")
17 | 
18 |     @BeforeAll
19 |     fun beforeAll() {
20 |         application.run(await = false, port = 8181)
21 |     }
22 | 
23 |     @Test
24 |     fun `Find all users on JSON REST endpoint`() {
25 |         client.get().uri("/api/users")
26 |                 .accept(APPLICATION_JSON)
27 |                 .retrieve()
28 |                 .bodyToFlux<User>()
29 |                 .test()
30 |                 .expectNextMatches { it.firstName == "Foo" && it.lastName == "Foo" && it.birthDate.isBefore(LocalDate.now()) }
31 |                 .expectNextMatches { it.firstName == "Bar" && it.lastName == "Bar" && it.birthDate.isBefore(LocalDate.now()) }
32 |                 .expectNextMatches { it.firstName == "Baz" && it.lastName == "Baz" && it.birthDate.isBefore(LocalDate.now()) }
33 |                 .verifyComplete()
34 |     }
35 | 
36 |     @Test
37 |     fun `Find all users on HTML page`() {
38 |         client.get().uri("/users")
39 |                 .accept(TEXT_HTML)
40 |                 .retrieve()
41 |                 .bodyToMono<String>()
42 |                 .test()
43 |                 .expectNextMatches { it.contains("Foo") && it.contains("Bar") && it.contains("Baz") }
44 |                 .verifyComplete()
45 |     }
46 | 
47 |     @Test
48 |     fun `Receive a stream of users via Server-Sent-Events`() {
49 |         client.get().uri("/api/users")
50 |                 .accept(TEXT_EVENT_STREAM)
51 |                 .retrieve()
52 |                 .bodyToFlux<User>()
53 |                 .test()
54 |                 .expectNextMatches { it.firstName == "Foo" && it.lastName == "Foo" && it.birthDate.isBefore(LocalDate.now()) }
55 |                 .expectNextMatches { it.firstName == "Bar" && it.lastName == "Bar" && it.birthDate.isBefore(LocalDate.now()) }
56 |                 .expectNextMatches { it.firstName == "Baz" && it.lastName == "Baz" && it.birthDate.isBefore(LocalDate.now()) }
57 |                 .expectNextMatches { it.firstName == "Foo" && it.lastName == "Foo" && it.birthDate.isBefore(LocalDate.now()) }
58 |                 .expectNextMatches { it.firstName == "Bar" && it.lastName == "Bar" && it.birthDate.isBefore(LocalDate.now()) }
59 |                 .expectNextMatches { it.firstName == "Baz" && it.lastName == "Baz" && it.birthDate.isBefore(LocalDate.now()) }
60 |                 .thenCancel()
61 |                 .verify()
62 |     }
63 | 
64 |     @AfterAll
65 |     fun afterAll() {
66 |         application.stop()
67 |     }
68 | }
69 | 


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/src/test/resources/junit-platform.properties:
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1 | junit.jupiter.testinstance.lifecycle.default = per_class


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