├── src
    ├── main
    │   ├── resources
    │   │   └── application.properties
    │   └── java
    │   │   └── com
    │   │       └── example
    │   │           └── orderservice
    │   │               └── OrderServiceApplication.java
    └── test
    │   └── java
    │       └── com
    │           └── example
    │               └── orderservice
    │                   └── OrderServiceApplicationTests.java
├── .mvn
    └── wrapper
    │   ├── maven-wrapper.jar
    │   └── maven-wrapper.properties
├── .gitignore
├── pom.xml
├── mvnw.cmd
└── mvnw


/src/main/resources/application.properties:
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1 | 


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/.mvn/wrapper/maven-wrapper.jar:
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https://raw.githubusercontent.com/spring-tips/statemachine/HEAD/.mvn/wrapper/maven-wrapper.jar


--------------------------------------------------------------------------------
/.mvn/wrapper/maven-wrapper.properties:
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1 | distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.2/apache-maven-3.5.2-bin.zip
2 | 


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/.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/


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/src/test/java/com/example/orderservice/OrderServiceApplicationTests.java:
--------------------------------------------------------------------------------
 1 | package com.example.orderservice;
 2 | 
 3 | import org.junit.Test;
 4 | import org.junit.runner.RunWith;
 5 | import org.springframework.boot.test.context.SpringBootTest;
 6 | import org.springframework.test.context.junit4.SpringRunner;
 7 | 
 8 | @RunWith(SpringRunner.class)
 9 | @SpringBootTest
10 | public class OrderServiceApplicationTests {
11 | 
12 | 	@Test
13 | 	public void contextLoads() {
14 | 	}
15 | 
16 | }
17 | 


--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3 |          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 4 |     <modelVersion>4.0.0</modelVersion>
 5 | 
 6 |     <groupId>com.example</groupId>
 7 |     <artifactId>order-service</artifactId>
 8 |     <version>0.0.1-SNAPSHOT</version>
 9 |     <packaging>jar</packaging>
10 | 
11 |     <name>order-service</name>
12 |     <description>Demo project for Spring Boot</description>
13 | 
14 |     <parent>
15 |         <groupId>org.springframework.boot</groupId>
16 |         <artifactId>spring-boot-starter-parent</artifactId>
17 |         <version>1.5.9.RELEASE</version>
18 |         <relativePath/> <!-- lookup parent from repository -->
19 |     </parent>
20 | 
21 |     <properties>
22 |         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
23 |         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
24 |         <java.version>1.8</java.version>
25 |     </properties>
26 | 
27 |     <dependencies>
28 |         <dependency>
29 |             <groupId>org.springframework.statemachine</groupId>
30 |             <artifactId>spring-statemachine-core</artifactId>
31 |             <version>1.2.3.RELEASE</version>
32 |         </dependency>
33 |         <dependency>
34 |             <groupId>org.springframework.boot</groupId>
35 |             <artifactId>spring-boot-starter-data-jpa</artifactId>
36 |         </dependency>
37 | 
38 |         <dependency>
39 |             <groupId>com.h2database</groupId>
40 |             <artifactId>h2</artifactId>
41 |             <scope>runtime</scope>
42 |         </dependency>
43 |         <dependency>
44 |             <groupId>org.projectlombok</groupId>
45 |             <artifactId>lombok</artifactId>
46 |             <optional>true</optional>
47 |         </dependency>
48 |         <dependency>
49 |             <groupId>org.springframework.boot</groupId>
50 |             <artifactId>spring-boot-starter-test</artifactId>
51 |             <scope>test</scope>
52 |         </dependency>
53 |     </dependencies>
54 | 
55 |     <build>
56 |         <plugins>
57 |             <plugin>
58 |                 <groupId>org.springframework.boot</groupId>
59 |                 <artifactId>spring-boot-maven-plugin</artifactId>
60 |             </plugin>
61 |         </plugins>
62 |     </build>
63 | 
64 | 
65 | </project>
66 | 


--------------------------------------------------------------------------------
/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 | @REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
 84 | @REM Fallback to current working directory if not found.
 85 | 
 86 | set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
 87 | IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
 88 | 
 89 | set EXEC_DIR=%CD%
 90 | set WDIR=%EXEC_DIR%
 91 | :findBaseDir
 92 | IF EXIST "%WDIR%"\.mvn goto baseDirFound
 93 | cd ..
 94 | IF "%WDIR%"=="%CD%" goto baseDirNotFound
 95 | set WDIR=%CD%
 96 | goto findBaseDir
 97 | 
 98 | :baseDirFound
 99 | set MAVEN_PROJECTBASEDIR=%WDIR%
100 | cd "%EXEC_DIR%"
101 | goto endDetectBaseDir
102 | 
103 | :baseDirNotFound
104 | set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
105 | cd "%EXEC_DIR%"
106 | 
107 | :endDetectBaseDir
108 | 
109 | IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
110 | 
111 | @setlocal EnableExtensions EnableDelayedExpansion
112 | for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
113 | @endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
114 | 
115 | :endReadAdditionalConfig
116 | 
117 | SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
118 | 
119 | set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
120 | set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
121 | 
122 | %MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
123 | if ERRORLEVEL 1 goto error
124 | goto end
125 | 
126 | :error
127 | set ERROR_CODE=1
128 | 
129 | :end
130 | @endlocal & set ERROR_CODE=%ERROR_CODE%
131 | 
132 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
133 | @REM check for post script, once with legacy .bat ending and once with .cmd ending
134 | if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
135 | if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
136 | :skipRcPost
137 | 
138 | @REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
139 | if "%MAVEN_BATCH_PAUSE%" == "on" pause
140 | 
141 | if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
142 | 
143 | exit /B %ERROR_CODE%
144 | 


--------------------------------------------------------------------------------
/mvnw:
--------------------------------------------------------------------------------
  1 | #!/bin/sh
  2 | # ----------------------------------------------------------------------------
  3 | # Licensed to the Apache Software Foundation (ASF) under one
  4 | # or more contributor license agreements.  See the NOTICE file
  5 | # distributed with this work for additional information
  6 | # regarding copyright ownership.  The ASF licenses this file
  7 | # to you under the Apache License, Version 2.0 (the
  8 | # "License"); you may not use this file except in compliance
  9 | # with the License.  You may obtain a copy of the License at
 10 | #
 11 | #    http://www.apache.org/licenses/LICENSE-2.0
 12 | #
 13 | # Unless required by applicable law or agreed to in writing,
 14 | # software distributed under the License is distributed on an
 15 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 16 | # KIND, either express or implied.  See the License for the
 17 | # specific language governing permissions and limitations
 18 | # under the License.
 19 | # ----------------------------------------------------------------------------
 20 | 
 21 | # ----------------------------------------------------------------------------
 22 | # Maven2 Start Up Batch script
 23 | #
 24 | # Required ENV vars:
 25 | # ------------------
 26 | #   JAVA_HOME - location of a JDK home dir
 27 | #
 28 | # Optional ENV vars
 29 | # -----------------
 30 | #   M2_HOME - location of maven2's installed home dir
 31 | #   MAVEN_OPTS - parameters passed to the Java VM when running Maven
 32 | #     e.g. to debug Maven itself, use
 33 | #       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
 34 | #   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
 35 | # ----------------------------------------------------------------------------
 36 | 
 37 | if [ -z "$MAVEN_SKIP_RC" ] ; then
 38 | 
 39 |   if [ -f /etc/mavenrc ] ; then
 40 |     . /etc/mavenrc
 41 |   fi
 42 | 
 43 |   if [ -f "$HOME/.mavenrc" ] ; then
 44 |     . "$HOME/.mavenrc"
 45 |   fi
 46 | 
 47 | fi
 48 | 
 49 | # OS specific support.  $var _must_ be set to either true or false.
 50 | cygwin=false;
 51 | darwin=false;
 52 | mingw=false
 53 | case "`uname`" in
 54 |   CYGWIN*) cygwin=true ;;
 55 |   MINGW*) mingw=true;;
 56 |   Darwin*) darwin=true
 57 |     # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
 58 |     # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
 59 |     if [ -z "$JAVA_HOME" ]; then
 60 |       if [ -x "/usr/libexec/java_home" ]; then
 61 |         export JAVA_HOME="`/usr/libexec/java_home`"
 62 |       else
 63 |         export JAVA_HOME="/Library/Java/Home"
 64 |       fi
 65 |     fi
 66 |     ;;
 67 | esac
 68 | 
 69 | if [ -z "$JAVA_HOME" ] ; then
 70 |   if [ -r /etc/gentoo-release ] ; then
 71 |     JAVA_HOME=`java-config --jre-home`
 72 |   fi
 73 | fi
 74 | 
 75 | if [ -z "$M2_HOME" ] ; then
 76 |   ## resolve links - $0 may be a link to maven's home
 77 |   PRG="$0"
 78 | 
 79 |   # need this for relative symlinks
 80 |   while [ -h "$PRG" ] ; do
 81 |     ls=`ls -ld "$PRG"`
 82 |     link=`expr "$ls" : '.*-> \(.*\)$'`
 83 |     if expr "$link" : '/.*' > /dev/null; then
 84 |       PRG="$link"
 85 |     else
 86 |       PRG="`dirname "$PRG"`/$link"
 87 |     fi
 88 |   done
 89 | 
 90 |   saveddir=`pwd`
 91 | 
 92 |   M2_HOME=`dirname "$PRG"`/..
 93 | 
 94 |   # make it fully qualified
 95 |   M2_HOME=`cd "$M2_HOME" && pwd`
 96 | 
 97 |   cd "$saveddir"
 98 |   # echo Using m2 at $M2_HOME
 99 | fi
100 | 
101 | # For Cygwin, ensure paths are in UNIX format before anything is touched
102 | if $cygwin ; then
103 |   [ -n "$M2_HOME" ] &&
104 |     M2_HOME=`cygpath --unix "$M2_HOME"`
105 |   [ -n "$JAVA_HOME" ] &&
106 |     JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
107 |   [ -n "$CLASSPATH" ] &&
108 |     CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
109 | fi
110 | 
111 | # For Migwn, ensure paths are in UNIX format before anything is touched
112 | if $mingw ; then
113 |   [ -n "$M2_HOME" ] &&
114 |     M2_HOME="`(cd "$M2_HOME"; pwd)`"
115 |   [ -n "$JAVA_HOME" ] &&
116 |     JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
117 |   # TODO classpath?
118 | fi
119 | 
120 | if [ -z "$JAVA_HOME" ]; then
121 |   javaExecutable="`which javac`"
122 |   if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
123 |     # readlink(1) is not available as standard on Solaris 10.
124 |     readLink=`which readlink`
125 |     if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
126 |       if $darwin ; then
127 |         javaHome="`dirname \"$javaExecutable\"`"
128 |         javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
129 |       else
130 |         javaExecutable="`readlink -f \"$javaExecutable\"`"
131 |       fi
132 |       javaHome="`dirname \"$javaExecutable\"`"
133 |       javaHome=`expr "$javaHome" : '\(.*\)/bin'`
134 |       JAVA_HOME="$javaHome"
135 |       export JAVA_HOME
136 |     fi
137 |   fi
138 | fi
139 | 
140 | if [ -z "$JAVACMD" ] ; then
141 |   if [ -n "$JAVA_HOME"  ] ; then
142 |     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
143 |       # IBM's JDK on AIX uses strange locations for the executables
144 |       JAVACMD="$JAVA_HOME/jre/sh/java"
145 |     else
146 |       JAVACMD="$JAVA_HOME/bin/java"
147 |     fi
148 |   else
149 |     JAVACMD="`which java`"
150 |   fi
151 | fi
152 | 
153 | if [ ! -x "$JAVACMD" ] ; then
154 |   echo "Error: JAVA_HOME is not defined correctly." >&2
155 |   echo "  We cannot execute $JAVACMD" >&2
156 |   exit 1
157 | fi
158 | 
159 | if [ -z "$JAVA_HOME" ] ; then
160 |   echo "Warning: JAVA_HOME environment variable is not set."
161 | fi
162 | 
163 | CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
164 | 
165 | # traverses directory structure from process work directory to filesystem root
166 | # first directory with .mvn subdirectory is considered project base directory
167 | find_maven_basedir() {
168 | 
169 |   if [ -z "$1" ]
170 |   then
171 |     echo "Path not specified to find_maven_basedir"
172 |     return 1
173 |   fi
174 | 
175 |   basedir="$1"
176 |   wdir="$1"
177 |   while [ "$wdir" != '/' ] ; do
178 |     if [ -d "$wdir"/.mvn ] ; then
179 |       basedir=$wdir
180 |       break
181 |     fi
182 |     # workaround for JBEAP-8937 (on Solaris 10/Sparc)
183 |     if [ -d "${wdir}" ]; then
184 |       wdir=`cd "$wdir/.."; pwd`
185 |     fi
186 |     # end of workaround
187 |   done
188 |   echo "${basedir}"
189 | }
190 | 
191 | # concatenates all lines of a file
192 | concat_lines() {
193 |   if [ -f "$1" ]; then
194 |     echo "$(tr -s '\n' ' ' < "$1")"
195 |   fi
196 | }
197 | 
198 | BASE_DIR=`find_maven_basedir "$(pwd)"`
199 | if [ -z "$BASE_DIR" ]; then
200 |   exit 1;
201 | fi
202 | 
203 | export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
204 | echo $MAVEN_PROJECTBASEDIR
205 | MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
206 | 
207 | # For Cygwin, switch paths to Windows format before running java
208 | if $cygwin; then
209 |   [ -n "$M2_HOME" ] &&
210 |     M2_HOME=`cygpath --path --windows "$M2_HOME"`
211 |   [ -n "$JAVA_HOME" ] &&
212 |     JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
213 |   [ -n "$CLASSPATH" ] &&
214 |     CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
215 |   [ -n "$MAVEN_PROJECTBASEDIR" ] &&
216 |     MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
217 | fi
218 | 
219 | WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
220 | 
221 | exec "$JAVACMD" \
222 |   $MAVEN_OPTS \
223 |   -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
224 |   "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
225 |   ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
226 | 


--------------------------------------------------------------------------------
/src/main/java/com/example/orderservice/OrderServiceApplication.java:
--------------------------------------------------------------------------------
  1 | package com.example.orderservice;
  2 | 
  3 | import lombok.AllArgsConstructor;
  4 | import lombok.Data;
  5 | import lombok.NoArgsConstructor;
  6 | import lombok.extern.java.Log;
  7 | import org.springframework.boot.ApplicationArguments;
  8 | import org.springframework.boot.ApplicationRunner;
  9 | import org.springframework.boot.SpringApplication;
 10 | import org.springframework.boot.autoconfigure.SpringBootApplication;
 11 | import org.springframework.context.annotation.Configuration;
 12 | import org.springframework.data.jpa.repository.JpaRepository;
 13 | import org.springframework.messaging.Message;
 14 | import org.springframework.messaging.support.MessageBuilder;
 15 | import org.springframework.statemachine.StateMachine;
 16 | import org.springframework.statemachine.config.EnableStateMachineFactory;
 17 | import org.springframework.statemachine.config.StateMachineConfigurerAdapter;
 18 | import org.springframework.statemachine.config.StateMachineFactory;
 19 | import org.springframework.statemachine.config.builders.StateMachineConfigurationConfigurer;
 20 | import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
 21 | import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
 22 | import org.springframework.statemachine.listener.StateMachineListenerAdapter;
 23 | import org.springframework.statemachine.state.State;
 24 | import org.springframework.statemachine.support.DefaultStateMachineContext;
 25 | import org.springframework.statemachine.support.StateMachineInterceptorAdapter;
 26 | import org.springframework.statemachine.transition.Transition;
 27 | import org.springframework.stereotype.Component;
 28 | import org.springframework.stereotype.Service;
 29 | 
 30 | import javax.persistence.Entity;
 31 | import javax.persistence.GeneratedValue;
 32 | import javax.persistence.Id;
 33 | import java.util.Date;
 34 | import java.util.Optional;
 35 | import java.util.UUID;
 36 | 
 37 | @SpringBootApplication
 38 | public class OrderServiceApplication {
 39 | 
 40 | 	public static void main(String[] args) {
 41 | 		SpringApplication.run(OrderServiceApplication.class, args);
 42 | 	}
 43 | }
 44 | 
 45 | enum OrderEvents {
 46 | 	FULFILL,
 47 | 	PAY,
 48 | 	CANCEL
 49 | }
 50 | 
 51 | enum OrderStates {
 52 | 	SUBMITTED,
 53 | 	PAID,
 54 | 	FULFILLED,
 55 | 	CANCELLED
 56 | 
 57 | }
 58 | 
 59 | @Service
 60 | class OrderService {
 61 | 
 62 | 	private final OrderRepository orderRepository;
 63 | 	private final StateMachineFactory<OrderStates, OrderEvents> factory;
 64 | 
 65 | 	private static final String ORDER_ID_HEADER = "orderId";
 66 | 
 67 | 	OrderService(OrderRepository orderRepository, StateMachineFactory<OrderStates, OrderEvents> factory) {
 68 | 		this.orderRepository = orderRepository;
 69 | 		this.factory = factory;
 70 | 	}
 71 | 
 72 | 	Order byId(Long id) {
 73 | 		return this.orderRepository.findOne(id);
 74 | 	}
 75 | 
 76 | 	Order create(Date when) {
 77 | 		return this.orderRepository.save(new Order(when, OrderStates.SUBMITTED));
 78 | 	}
 79 | 
 80 | 	StateMachine<OrderStates, OrderEvents> pay(Long orderId, String paymentConfirmationNumber) {
 81 | 		StateMachine<OrderStates, OrderEvents> sm = this.build(orderId);
 82 | 
 83 | 		Message<OrderEvents> paymentMessage = MessageBuilder.withPayload(OrderEvents.PAY)
 84 | 				.setHeader(ORDER_ID_HEADER, orderId)
 85 | 				.setHeader("paymentConfirmationNumber", paymentConfirmationNumber)
 86 | 				.build();
 87 | 
 88 | 		sm.sendEvent(paymentMessage);
 89 | 		// todo
 90 | 		return sm;
 91 | 	}
 92 | 
 93 | 	StateMachine<OrderStates, OrderEvents> fulfill(Long orderId) {
 94 | 		StateMachine<OrderStates, OrderEvents> sm = this.build(orderId);
 95 | 		Message<OrderEvents> fulfillmentMessage = MessageBuilder.withPayload(OrderEvents.FULFILL)
 96 | 				.setHeader(ORDER_ID_HEADER, orderId)
 97 | 				.build();
 98 | 		sm.sendEvent(fulfillmentMessage);
 99 | 		return sm;
100 | 	}
101 | 
102 | 	private StateMachine<OrderStates, OrderEvents> build(Long orderId) {
103 | 		Order order = this.orderRepository.findOne(orderId);
104 | 		String orderIdKey = Long.toString(order.getId());
105 | 
106 | 		StateMachine<OrderStates, OrderEvents> sm = this.factory.getStateMachine(orderIdKey);
107 | 		sm.stop();
108 | 		sm.getStateMachineAccessor()
109 | 				.doWithAllRegions(sma -> {
110 | 
111 | 					sma.addStateMachineInterceptor(new StateMachineInterceptorAdapter<OrderStates, OrderEvents>() {
112 | 
113 | 						@Override
114 | 						public void preStateChange(State<OrderStates, OrderEvents> state, Message<OrderEvents> message, Transition<OrderStates, OrderEvents> transition, StateMachine<OrderStates, OrderEvents> stateMachine) {
115 | 
116 | 							Optional.ofNullable(message).ifPresent(msg -> {
117 | 
118 | 								Optional.ofNullable(Long.class.cast(msg.getHeaders().getOrDefault(ORDER_ID_HEADER, -1L)))
119 | 										.ifPresent(orderId1 -> {
120 | 											Order order1 = orderRepository.findOne(orderId1);
121 | 											order1.setOrderState(state.getId());
122 | 											orderRepository.save(order1);
123 | 										});
124 | 							});
125 | 
126 | 						}
127 | 					});
128 | 					sma.resetStateMachine(new DefaultStateMachineContext<>(order.getOrderState(), null, null, null));
129 | 				});
130 | 		sm.start();
131 | 		return sm;
132 | 	}
133 | }
134 | 
135 | @Log
136 | @Component
137 | class Runner implements ApplicationRunner {
138 | 
139 | 	@Override
140 | 	public void run(ApplicationArguments args) throws Exception {
141 | 
142 | 		Order order = this.orderService.create(new Date());
143 | 
144 | 		StateMachine<OrderStates, OrderEvents> paymentStateMachine = orderService.pay(order.getId(), UUID.randomUUID().toString());
145 | 		log.info("after calling pay(): " + paymentStateMachine.getState().getId().name());
146 | 		log.info("order: " + orderService.byId(order.getId()));
147 | 
148 | 		StateMachine<OrderStates, OrderEvents> fulfilledStateMachine = orderService.fulfill(order.getId());
149 | 		log.info("after calling fulfill(): " + fulfilledStateMachine.getState().getId().name());
150 | 		log.info("order: " + orderService.byId(order.getId()));
151 | 
152 | 
153 | 	}
154 | 
155 | 	private final OrderService orderService;
156 | 
157 | 	Runner(OrderService orderService) {
158 | 		this.orderService = orderService;
159 | 	}
160 | }
161 | 
162 | interface OrderRepository extends JpaRepository<Order, Long> {
163 | 
164 | }
165 | 
166 | @Entity(name = "ORDERS")
167 | @Data
168 | @NoArgsConstructor
169 | @AllArgsConstructor
170 | class Order {
171 | 
172 | 	@Id
173 | 	@GeneratedValue
174 | 	private Long id;
175 | 	private Date datetime;
176 | 
177 | 	private String state;
178 | 
179 | 	public Order(Date d, OrderStates os) {
180 | 		this.datetime = d;
181 | 		this.setOrderState(os);
182 | 	}
183 | 
184 | 	public OrderStates getOrderState() {
185 | 		return OrderStates.valueOf(this.state);
186 | 	}
187 | 
188 | 	public void setOrderState(OrderStates s) {
189 | 		this.state = s.name();
190 | 	}
191 | 
192 | }
193 | 
194 | @Log
195 | @Configuration
196 | @EnableStateMachineFactory
197 | class SimpleEnumStatemachineConfiguration extends StateMachineConfigurerAdapter<OrderStates, OrderEvents> {
198 | 
199 | 	@Override
200 | 	public void configure(StateMachineTransitionConfigurer<OrderStates, OrderEvents> transitions) throws Exception {
201 | 		transitions
202 | 				.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.PAID).event(OrderEvents.PAY)
203 | 				.and()
204 | 				.withExternal().source(OrderStates.PAID).target(OrderStates.FULFILLED).event(OrderEvents.FULFILL)
205 | 				.and()
206 | 				.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.CANCELLED).event(OrderEvents.CANCEL)
207 | 				.and()
208 | 				.withExternal().source(OrderStates.PAID).target(OrderStates.CANCELLED).event(OrderEvents.CANCEL);
209 | 	}
210 | 
211 | 	@Override
212 | 	public void configure(StateMachineStateConfigurer<OrderStates, OrderEvents> states) throws Exception {
213 | 		states
214 | 				.withStates()
215 | 				.initial(OrderStates.SUBMITTED)
216 | 				/*.stateEntry(OrderStates.SUBMITTED, context -> {
217 | 					Long orderId = Long.class.cast(context.getExtendedState().getVariables().getOrDefault("orderId", -1L));
218 | 					log.info("orderId is " + orderId + ".");
219 | 					log.info("entering submitted state!");
220 | 				})*/
221 | 				.state(OrderStates.PAID)
222 | 				.end(OrderStates.FULFILLED)
223 | 				.end(OrderStates.CANCELLED);
224 | 	}
225 | 
226 | 	@Override
227 | 	public void configure(StateMachineConfigurationConfigurer<OrderStates, OrderEvents> config) throws Exception {
228 | 
229 | 		StateMachineListenerAdapter<OrderStates, OrderEvents> adapter = new StateMachineListenerAdapter<OrderStates, OrderEvents>() {
230 | 			@Override
231 | 			public void stateChanged(State<OrderStates, OrderEvents> from, State<OrderStates, OrderEvents> to) {
232 | 				log.info(String.format("stateChanged(from: %s, to: %s)", from + "", to + ""));
233 | 			}
234 | 		};
235 | 		config.withConfiguration()
236 | 				.autoStartup(false)
237 | 				.listener(adapter);
238 | 	}
239 | }


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