initial

.gitattributes

@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary

.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

README.md

@@ -0,0 +1,18 @@
+
+```shell
+brew install graphviz
+```
+
+```shell
+dot -Tpng statemachine.dot -o statemachine.png
+```
+
+
+```shell
+brew install plantuml
+```
+```shell
+plantuml statemachine.uml.dot
+```
+
+plantuml statemachine.scxml

build.gradle

@@ -0,0 +1,45 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.5.3'
+	id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter'
+	implementation 'org.springframework.statemachine:spring-statemachine-starter:3.2.0'
+
+	// uml model parsing
+//	implementation 'org.springframework.statemachine:spring-statemachine-uml:3.2.0'
+
+	// deps for SCXMLWriter
+//	implementation "org.apache.commons:scxml4j:1.0.0"
+
+
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'statemachinedemo'

src/main/java/com/example/statemachinedemo/StatemachinedemoApplication.java

@@ -0,0 +1,274 @@
+package com.example.statemachinedemo;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.statemachine.StateContext;
+import org.springframework.statemachine.StateMachine;
+import org.springframework.statemachine.config.EnableStateMachineFactory;
+import org.springframework.statemachine.config.StateMachineConfigurerAdapter;
+import org.springframework.statemachine.config.StateMachineFactory;
+import org.springframework.statemachine.config.builders.StateMachineConfigurationConfigurer;
+import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
+import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
+import org.springframework.statemachine.guard.Guard;
+import org.springframework.statemachine.listener.StateMachineListenerAdapter;
+import org.springframework.statemachine.state.PseudoStateKind;
+import org.springframework.statemachine.state.State;
+import org.springframework.statemachine.transition.Transition;
+import org.springframework.stereotype.Component;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+import java.util.Collection;
+
+@SpringBootApplication
+public class StatemachinedemoApplication {
+	public static void main(String[] args) {
+		SpringApplication.run(StatemachinedemoApplication.class, args);
+	}
+}
+
+enum OrderEvents {
+	FULFILL, PAY, CANCEL
+}
+
+enum OrderStates {
+	SUBMITTED, PAID, FULFILLED, CANCELED
+//	,PAID2, PAID3
+}
+
+@Component
+@Slf4j
+@RequiredArgsConstructor
+class Runner implements ApplicationRunner {
+	private final StateMachineFactory<OrderStates, OrderEvents> factory;
+//
+//	@Override
+//	public void run(ApplicationArguments args) throws Exception {
+//		StateMachine<OrderStates, OrderEvents> stateMachine = factory.getStateMachine("order");
+//		stateMachine.start();
+//		log.info("Current state is {}", stateMachine.getState().getId());
+//
+//	}
+	private final Config1 c;
+	private final Config2 c2;
+	private final Config3 c3;
+
+	@Override
+	public void run(ApplicationArguments args) throws Exception {
+		c.a();
+		c2.a();
+//		c3.exportToSCXML();
+	}
+}
+
+class StateMachineDotExporter {
+	public static <S, E> void export(StateMachine<S, E> stateMachine, PrintWriter writer) {
+		writer.println("digraph stateMachine {");
+
+		for (State<S, E> state : stateMachine.getStates()) {
+			writer.printf("    %s;%n", state.getId());
+		}
+
+		for (Transition<S, E> transition : stateMachine.getTransitions()) {
+			if (transition.getSource() != null && transition.getTarget() != null) {
+				writer.printf("    %s -> %s [label=\"%s\"];%n",
+						transition.getSource().getId(),
+						transition.getTarget().getId(),
+						transition.getTrigger() != null ? transition.getTrigger().getEvent() : "");
+			}
+		}
+
+		writer.println("}");
+	}
+}
+
+class StateMachinePlantUMLExporter {
+
+	public static <S, E> void export(StateMachine<S, E> stateMachine, PrintWriter writer) {
+		writer.println("@startuml");
+		writer.println("[*] --> " + stateMachine.getInitialState().getId());
+
+		for (Transition<S, E> transition : stateMachine.getTransitions()) {
+			if (transition.getSource() != null && transition.getTarget() != null) {
+				String source = transition.getSource().getId().toString();
+				String target = transition.getTarget().getId().toString();
+				String event = transition.getTrigger() != null && transition.getTrigger().getEvent() != null
+						? transition.getTrigger().getEvent().toString()
+						: "";
+				writer.printf("%s --> %s : %s%n", source, target, event);
+			}
+		}
+
+		for (State<S, E> state : stateMachine.getStates()) {
+			if (state.getPseudoState() != null &&
+					state.getPseudoState().getKind() == PseudoStateKind.END) {
+				writer.printf("%s --> [*]%n", state.getId());
+			}
+		}
+		writer.println("@enduml");
+	}
+}
+
+@Component
+@RequiredArgsConstructor
+class Config1 {
+	private final StateMachineFactory<OrderStates, OrderEvents> factory;
+	public void a() throws FileNotFoundException {
+		StateMachine<OrderStates, OrderEvents> stateMachine = factory.getStateMachine("order");
+
+		StateMachineDotExporter exporter = new StateMachineDotExporter();
+		try (PrintWriter out = new PrintWriter("statemachine.dot")) {
+			StateMachineDotExporter.export(stateMachine, out);
+		}
+	}
+}
+
+@Component
+@RequiredArgsConstructor
+class Config2 {
+	private final StateMachineFactory<OrderStates, OrderEvents> factory;
+	public void a() throws FileNotFoundException {
+		StateMachine<OrderStates, OrderEvents> stateMachine = factory.getStateMachine("order");
+
+		try (PrintWriter out = new PrintWriter("statemachine.uml.dot")) {
+			StateMachinePlantUMLExporter.export(stateMachine, out);
+		}
+	}
+}
+
+@Component
+class SCXMLExporter {
+
+	// This method assumes you already have a state machine
+	public <S, E> void exportToSCXML(StateMachine<S, E> stateMachine) throws Exception {
+		// Create a document to represent the SCXML structure
+		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+		DocumentBuilder builder = factory.newDocumentBuilder();
+		Document doc = builder.newDocument();
+
+		// Root SCXML element
+		Element scxmlElement = doc.createElement("scxml");
+		scxmlElement.setAttribute("version", "1.0");
+		doc.appendChild(scxmlElement);
+
+		// Define the states
+		Element statesElement = doc.createElement("states");
+		scxmlElement.appendChild(statesElement);
+
+		// Iterate over the states of the state machine
+		Collection<State<S, E>> states =  stateMachine.getStates();
+		for (State<S, E> state : states) {
+			Element stateElement = doc.createElement("state");
+			stateElement.setAttribute("id", state.getId().toString());
+			statesElement.appendChild(stateElement);
+		}
+
+		// Define the transitions
+		Element transitionsElement = doc.createElement("transitions");
+		scxmlElement.appendChild(transitionsElement);
+
+		Collection<Transition<S, E>> transitions = stateMachine.getTransitions();
+		for (Transition<S, E> transition : transitions) {
+			Element transitionElement = doc.createElement("transition");
+			transitionElement.setAttribute("from",  transition.getSource().getId().toString());
+			transitionElement.setAttribute("to",  transition.getTarget().getId().toString());
+			transitionElement.setAttribute("event", String.valueOf(transition.getTrigger()));
+			transitionsElement.appendChild(transitionElement);
+		}
+
+		// Write to file
+		File file = new File("stateMachine.scxml");
+		saveDocumentToFile(doc, file);
+	}
+
+	private void saveDocumentToFile(Document doc, File file) throws Exception {
+		// Serialize the document to a file (you can use your preferred XML writer)
+		javax.xml.transform.Transformer transformer = javax.xml.transform.TransformerFactory.newInstance().newTransformer();
+		javax.xml.transform.stream.StreamResult result = new javax.xml.transform.stream.StreamResult(file);
+		javax.xml.transform.dom.DOMSource source = new javax.xml.transform.dom.DOMSource(doc);
+		transformer.transform(source, result);
+	}
+}
+@Component
+@RequiredArgsConstructor
+class Config3 {
+	private final StateMachineFactory<OrderStates, OrderEvents> factory;
+	public void exportToSCXML() throws Exception {
+		StateMachine<OrderStates, OrderEvents> stateMachine = factory.getStateMachine("order");
+
+		SCXMLExporter  exporter = new SCXMLExporter();
+		File file = new File("statemachine.scxml");
+		exporter.exportToSCXML(stateMachine);
+	}
+}
+
+@Configuration
+@EnableStateMachineFactory
+@Slf4j
+class SimpleEnumStateMachineConfiguration extends StateMachineConfigurerAdapter<OrderStates, OrderEvents> {
+	@Override
+	public void configure(StateMachineTransitionConfigurer<OrderStates, OrderEvents> transitions) throws Exception {
+		transitions
+				.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.PAID).event(OrderEvents.PAY)
+				.and()
+				.withExternal().source(OrderStates.PAID).target(OrderStates.FULFILLED).event(OrderEvents.FULFILL)
+				.and()
+				.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.CANCELED).event(OrderEvents.CANCEL).guard(new Guard<OrderStates, OrderEvents>() {
+					@Override
+					public boolean evaluate(StateContext<OrderStates, OrderEvents> context) {
+						return false;
+					}
+				})
+				.and()
+				.withExternal().source(OrderStates.PAID).target(OrderStates.CANCELED).event(OrderEvents.CANCEL);
+
+//
+//				.and()
+//				.withChoice()
+//				.source(OrderStates.SUBMITTED)
+//				.first(OrderStates.PAID2, new Guard<OrderStates, OrderEvents>() {
+//					@Override
+//					public boolean evaluate(StateContext<OrderStates, OrderEvents> context) {
+//						return false;
+//					}
+//				})
+//				.last(OrderStates.PAID3)
+//				.and().withExternal().source(OrderStates.PAID2).target(OrderStates.CANCELED)
+//				.and().withExternal().source(OrderStates.PAID3).target(OrderStates.CANCELED);
+	}
+
+	@Override
+	public void configure(StateMachineStateConfigurer<OrderStates, OrderEvents> states) throws Exception {
+		states.withStates()
+				.initial(OrderStates.SUBMITTED)
+				.state(OrderStates.PAID)
+//				.state(OrderStates.PAID2)
+//				.state(OrderStates.PAID3)
+				.end(OrderStates.FULFILLED)
+				.end(OrderStates.CANCELED);
+
+	}
+	@Override
+	public void configure(StateMachineConfigurationConfigurer<OrderStates, OrderEvents> config) throws Exception {
+		StateMachineListenerAdapter<OrderStates, OrderEvents> listenerAdapter = new StateMachineListenerAdapter<>() {
+			@Override
+			public void stateChanged(State<OrderStates, OrderEvents> from, State<OrderStates, OrderEvents> to) {
+				log.info("state changed from {} to {}", from, to);
+			}
+		};
+		config.withConfiguration()
+				.autoStartup(false)
+				.listener(listenerAdapter);
+	}
+}

src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.application.name=statemachinedemo

src/test/java/com/example/statemachinedemo/StatemachinedemoApplicationTests.java

@@ -0,0 +1,13 @@
+package com.example.statemachinedemo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class StatemachinedemoApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

stateMachine.scxml

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><scxml version="1.0"><states><state id="CANCELED"/><state id="PAID"/><state id="FULFILLED"/><state id="SUBMITTED"/></states><transitions><transition event="org.springframework.statemachine.trigger.EventTrigger@3ba348ca" from="SUBMITTED" to="PAID"/><transition event="org.springframework.statemachine.trigger.EventTrigger@56e9a474" from="PAID" to="FULFILLED"/><transition event="org.springframework.statemachine.trigger.EventTrigger@45b15381" from="SUBMITTED" to="CANCELED"/><transition event="org.springframework.statemachine.trigger.EventTrigger@2dbfcf7" from="PAID" to="CANCELED"/></transitions></scxml>

statemachine.dot

@@ -0,0 +1,14 @@
+digraph stateMachine {
+    PAID2;
+    SUBMITTED;
+    PAID;
+    PAID3;
+    CANCELED;
+    FULFILLED;
+    SUBMITTED -> PAID [label="PAY"];
+    PAID -> FULFILLED [label="FULFILL"];
+    SUBMITTED -> CANCELED [label="CANCEL"];
+    PAID -> CANCELED [label="CANCEL"];
+    PAID2 -> CANCELED [label=""];
+    PAID3 -> CANCELED [label=""];
+}

statemachine.uml.dot

@@ -0,0 +1,11 @@
+@startuml
+[*] --> SUBMITTED
+SUBMITTED --> PAID : PAY
+PAID --> FULFILLED : FULFILL
+SUBMITTED --> CANCELED : CANCEL
+PAID --> CANCELED : CANCEL
+PAID2 --> CANCELED
+PAID3 --> CANCELED
+CANCELED --> [*]
+FULFILLED --> [*]
+@enduml