Repository: serverlessworkflow/sdk-java
Pull request #217 (2022-12-02 15:22:22)

Enhancement. Reactive api rest for get SVG #216
Signed-off-by: davideduma <david24eduma@gmail.com>

**:heart:**

**What this PR does / why we need it**:  Reactive api rest for get SVG

**Special notes for reviewers**:

**Additional information (if needed):**

tsurdilo: @davideduma thanks for the pr. can you give some info on what it does? 
tsurdilo: Think most of files are missing our copyright. please add
davideduma: > @davideduma thanks for the pr. can you give some more info on what it does?

With this functionality. It is possible to get the SVG string through a API REST

![image](https://user-images.githubusercontent.com/86481341/205727678-e9ce39d2-1e03-4115-b86d-6e8bb14743a1.png)

davideduma: > Think most of files are missing our copyright. please add

Please give me a couple examples. i dont undestand 
tsurdilo: Hi, you can look at any source files in the repo, for example: https://github.com/serverlessworkflow/sdk-java/blob/main/api/src/main/java/io/serverlessworkflow/api/deserializers/AuthDefinitionDeserializer.java#L1-L15
davideduma: this suggestion cannot be applied. The above line is required.:

![image](https://user-images.githubusercontent.com/86481341/206780297-bee5b128-0448-4813-96f9-a8e483ce8a09.png)

davideduma: Fixed issues sonatype
davideduma: Hi. Can you help me. This pull request still in progress. Thanks!
davideduma: > Hi. Can you help me. This pull request still in progress. Thanks!

Only Awaiting approval to owner.

Patch:
diff --git a/api_rest/mvnw b/api_rest/mvnw
new file mode 100644
index 0000000..8a8fb22
--- /dev/null
+++ b/api_rest/mvnw
@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  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
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/api_rest/mvnw.cmd b/api_rest/mvnw.cmd
new file mode 100644
index 0000000..1d8ab01
--- /dev/null
+++ b/api_rest/mvnw.cmd
@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  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,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
diff --git a/api_rest/pom.xml b/api_rest/pom.xml
new file mode 100644
index 0000000..041c3ed
--- /dev/null
+++ b/api_rest/pom.xml
@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.7.6</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.serverless</groupId>
+	<artifactId>serverlessworkflow-apirest</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>Serverless Workflow :: APIREST</name>
+	<description>APIREST project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>io.projectreactor</groupId>
+			<artifactId>reactor-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>io.swagger.core.v3</groupId>
+			<artifactId>swagger-annotations</artifactId>
+			<version>2.2.7</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springdoc</groupId>
+			<artifactId>springdoc-openapi-webflux-core</artifactId>
+			<version>1.6.13</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springdoc</groupId>
+			<artifactId>springdoc-openapi-webflux-ui</artifactId>
+			<version>1.6.13</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-test -->
+		<dependency>
+			<groupId>org.springframework.security</groupId>
+			<artifactId>spring-security-test</artifactId>
+			<version>5.3.13.RELEASE</version>
+			<scope>test</scope>
+		</dependency>
+
+
+
+		<dependency>
+			<groupId>io.serverlessworkflow</groupId>
+			<artifactId>serverlessworkflow-api</artifactId>
+			<version>5.0.0-SNAPSHOT</version>
+		</dependency>
+		<dependency>
+			<groupId>io.serverlessworkflow</groupId>
+			<artifactId>serverlessworkflow-diagram</artifactId>
+			<version>5.0.0-SNAPSHOT</version>
+		</dependency>
+	</dependencies>
+
+	<distributionManagement>
+		<snapshotRepository>
+			<id>ossrh</id>
+			<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+		</snapshotRepository>
+		<repository>
+			<id>ossrh</id>
+			<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+		</repository>
+	</distributionManagement>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/Application.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/Application.java
new file mode 100644
index 0000000..aa2569f
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/Application.java
@@ -0,0 +1,27 @@
+package io.serverlessworkflow.reactive_api_rest;
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ControllerErrorException.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ControllerErrorException.java
new file mode 100644
index 0000000..3e7f6ff
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ControllerErrorException.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+public class ControllerErrorException extends Exception {
+  public ControllerErrorException(String errorMessage) {
+    super(errorMessage);
+  }
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/IRouterRest.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/IRouterRest.java
new file mode 100644
index 0000000..0c09c34
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/IRouterRest.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import org.springdoc.core.annotations.RouterOperation;
+import org.springdoc.core.annotations.RouterOperations;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerResponse;
+
+public interface IRouterRest {
+
+  @RouterOperations(
+      value = {
+        @RouterOperation(
+            path = RouterPaths.GETTING_SVG_FROM_WORKFLOW,
+            produces = {MediaType.APPLICATION_JSON_VALUE},
+            method = RequestMethod.POST,
+            beanClass = ServerlessRequest.class,
+            beanMethod = "getDiagramSVGFromWorkFlow",
+            operation =
+                @Operation(
+                    operationId = "Get-Diagram-SVG-From-WorkFlow",
+                    responses = {
+                      @ApiResponse(
+                          responseCode = "200",
+                          description = "Get diagram SVG from workFlow",
+                          content =
+                              @Content(
+                                  schema =
+                                      @Schema(implementation = ServerlessWorkFlowResponse.class)))
+                    }
+                    /*,
+                    security = @SecurityRequirement(
+                            name = "bearer-key",
+                            scopes = {}
+                    )*/
+                    ))
+      })
+  RouterFunction<ServerResponse> servelessRouterFunction(ServerlessRequest serverlessRequest);
+
+
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterPaths.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterPaths.java
new file mode 100644
index 0000000..77b8b7a
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterPaths.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+public class RouterPaths {
+
+  // get string of SVG from YAML or JSON file
+  public static final String GETTING_SVG_FROM_WORKFLOW = "/api/get_svg_from_workflow";
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterRest.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterRest.java
new file mode 100644
index 0000000..dcc61b5
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/RouterRest.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerResponse;
+
+@Configuration
+public class RouterRest implements IRouterRest {
+
+  /***
+   * Get image SVG from string.
+   * @param serverlessRequest The serverless request.
+   * @return String from SVG image
+   */
+  @Bean
+  @Override
+  public RouterFunction<ServerResponse> servelessRouterFunction(ServerlessRequest serverlessRequest) {
+    return route(POST(RouterPaths.GETTING_SVG_FROM_WORKFLOW),
+            serverlessRequest::getDiagramSVGFromWorkFlow);
+  }
+
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelper.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelper.java
new file mode 100644
index 0000000..75e2f5f
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelper.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import io.serverlessworkflow.api.Workflow;
+import io.serverlessworkflow.api.interfaces.WorkflowDiagram;
+import io.serverlessworkflow.diagram.WorkflowDiagramImpl;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import reactor.core.publisher.Mono;
+
+@Component
+@RequiredArgsConstructor
+public class ServerlesRequestHelper {
+
+  public Mono<ServerlessWorkFlowResponse> getSvg(String workFlow) {
+    String diagramSVG = "";
+    Workflow workflow = Workflow.fromSource(workFlow);
+
+    ServerlessWorkFlowResponse response = new ServerlessWorkFlowResponse();
+
+    WorkflowDiagram workflowDiagram =
+        new WorkflowDiagramImpl()
+            .showLegend(true)
+            .setWorkflow(workflow)
+            .setTemplate("custom-template");
+
+    try {
+      diagramSVG = workflowDiagram.getSvgDiagram();
+    } catch (Exception e) {
+      response.setResponse(e.getMessage());
+      return Mono.just(response);
+    }
+
+    response.setResponse(diagramSVG);
+
+    return Mono.just(response);
+  }
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessRequest.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessRequest.java
new file mode 100644
index 0000000..f77350f
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessRequest.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+
+@Component
+@RequiredArgsConstructor
+public class ServerlessRequest {
+
+  private final ServerlesRequestHelper helper;
+
+  /**
+   * Get the SVG diagram of a workflow from API Request
+   *
+   * @param sRequest workFlow (yml or json)
+   * @return String SVG
+   */
+  public Mono<ServerResponse> getDiagramSVGFromWorkFlow(ServerRequest sRequest) {
+    return ServerResponse.ok()
+        .contentType(MediaType.APPLICATION_JSON)
+        .body(
+            sRequest
+                .bodyToMono(String.class)
+                .flatMap(helper::getSvg)
+                .onErrorMap(e -> new ControllerErrorException(e.getMessage())),
+            ServerlessWorkFlowResponse.class);
+  }
+}
diff --git a/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessWorkFlowResponse.java b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessWorkFlowResponse.java
new file mode 100644
index 0000000..f36e24d
--- /dev/null
+++ b/api_rest/src/main/java/io/serverlessworkflow/reactive_api_rest/ServerlessWorkFlowResponse.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+public class ServerlessWorkFlowResponse {
+  private String response;
+
+  public String getResponse() {
+    return response;
+  }
+
+  public void setResponse(String response) {
+    this.response = response;
+  }
+}
diff --git a/api_rest/src/main/resources/application.yml b/api_rest/src/main/resources/application.yml
new file mode 100644
index 0000000..b6080e2
--- /dev/null
+++ b/api_rest/src/main/resources/application.yml
@@ -0,0 +1,12 @@
+springdoc:
+  api-docs:
+    groups:
+      enable: true
+    path: "/api/serverless/v3/api-docs"
+  swagger-ui:
+    path: "/api/serverless/swagger-ui.html"
+server:
+  port: 8090
+spring:
+  application:
+    name: "Serverless-workflow"
\ No newline at end of file
diff --git a/api_rest/src/main/resources/templates/plantuml/custom-template.txt b/api_rest/src/main/resources/templates/plantuml/custom-template.txt
new file mode 100644
index 0000000..e162afc
--- /dev/null
+++ b/api_rest/src/main/resources/templates/plantuml/custom-template.txt
@@ -0,0 +1,46 @@
+@startuml
+skinparam backgroundColor White
+skinparam legendBackgroundColor White
+skinparam legendBorderColor White
+skinparam state {
+  StartColor Green
+  EndColor Orange
+  BackgroundColor GhostWhite
+  BackgroundColor<< workflow >> White
+  BorderColor Black
+  ArrowColor Black
+
+  BorderColor<< event >> #7fe5f0
+  BorderColor<< operation >> #bada55
+  BorderColor<< switch >> #92a0f2
+  BorderColor<< sleep >> #b83b5e
+  BorderColor<< parallel >> #6a2c70
+  BorderColor<< inject >> #1e5f74
+  BorderColor<< foreach >> #931a25
+  BorderColor<< callback >> #ffcb8e
+}
+state "[(${diagram.title})]" as workflow << workflow >> {
+
+[# th:each="stateDef : ${diagram.modelStateDefs}" ]
+[(${stateDef.toString()})]
+[/]
+
+[# th:each="state : ${diagram.modelStates}" ]
+[(${state.toString()})]
+[/]
+
+[# th:each="connection : ${diagram.modelConnections}" ]
+[(${connection.toString()})]
+[/]
+
+}
+
+[# th:if="${diagram.showLegend}" ]
+legend center
+State Types and Border Colors:
+| Event | Operation | Switch | Sleep | Parallel | Inject | ForEach | CallBack |
+|<#7fe5f0>|<#bada55>|<#92a0f2>|<#b83b5e>|<#6a2c70>|<#1e5f74>|<#931a25>|<customcolor>|
+endlegend
+[/]
+
+@enduml
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index be3b076..505a424 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,7 @@
 
     <modules>
         <module>api</module>
+        <module>api_rest</module>
         <module>spi</module>
         <module>validation</module>
         <module>diagram</module>


Test patch:
diff --git a/api_rest/src/test/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelperTest.java b/api_rest/src/test/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelperTest.java
new file mode 100644
index 0000000..6290e19
--- /dev/null
+++ b/api_rest/src/test/java/io/serverlessworkflow/reactive_api_rest/ServerlesRequestHelperTest.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * http://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.
+ */
+package io.serverlessworkflow.reactive_api_rest;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = {
+        RouterRest.class,
+        ServerlessRequest.class,
+        ServerlesRequestHelper.class
+})
+@WebFluxTest
+class ServerlesRequestHelperTest {
+
+    private ServerlesRequestHelper serverlesRequestHelper;
+
+    public static final String input = "id: greeting\n" +
+            "version: '1.0'\n" +
+            "specVersion: '0.8'\n" +
+            "name: Greeting Workflow\n" +
+            "description: Greet Someone\n" +
+            "start: Greet\n" +
+            "functions:\n" +
+            "  - name: greetingFunction\n" +
+            "    operation: file://myapis/greetingapis.json#greeting\n" +
+            "states:\n" +
+            "  - name: Greet\n" +
+            "    type: operation\n" +
+            "    actions:\n" +
+            "      - functionRef:\n" +
+            "          refName: greetingFunction\n" +
+            "          arguments:\n" +
+            "            name: \"${ .person.name }\"\n" +
+            "        actionDataFilter:\n" +
+            "          results: \"${ .greeting }\"\n" +
+            "    end: true";
+
+    @BeforeEach
+    void setUp() {
+        serverlesRequestHelper = new ServerlesRequestHelper();
+    }
+
+    @Test
+    void getSvg() {
+        Mono<ServerlessWorkFlowResponse> monoSvg = serverlesRequestHelper.getSvg(input);
+        StepVerifier.create(monoSvg)
+                .expectNextMatches(serverlessWorkFlowResponse -> serverlessWorkFlowResponse.
+                        getResponse()
+                        .contains("svg"))
+                .verifyComplete();
+    }
+}
\ No newline at end of file