Spring Boot without the web server

Question

I have a simple Spring Boot application that gets messages from a JMS queue and saves some data to a log file  but does not need a web server  Is there any way of starting Spring Boot without the web server

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Remove folowing dependancy on your pom file will work  for me     lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt  dependency gt

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if you want to run spring boot without a servlet container  but with one on the classpath  e g  for tests   use the following  as described in the spring boot documentation    Configuration  EnableAutoConfiguration public class MyClass      public static void main String   args  throws JAXBException                    SpringApplication app   new SpringApplication MyClass class            app setWebEnvironment false      lt  lt  lt  lt  lt  lt  lt  lt  lt           ConfigurableApplicationContext ctx   app run args             also  I just stumbled across this property   spring main web-environment false

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Use this code   SpringApplication application   new SpringApplication DemoApplication class   application setWebApplicationType WebApplicationType NONE   application run args

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Spring boot will not include embedded tomcat if you don t have Tomcat dependencies on the classpath  You can view this fact yourself at the class EmbeddedServletContainerAutoConfiguration whose source you can find here   The meat of the code is the use of the  ConditionalOnClass annotation on the class EmbeddedTomcat    Also  for more information check out this and this guide and this part of the documentation

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Spring Boot 2 x   Application Properties  spring main web-application-type NONE    REACTIVE  SERVLET  or SpringApplicationBuilder   SpringBootApplication public class MyApplication        public static void main String   args            new SpringApplicationBuilder MyApplication class               web WebApplicationType NONE      REACTIVE   SERVLET              run args               Where WebApplicationType         NONE - The application should not run as a web application and should not start an embedded web server    REACTIVE - The application should run as a reactive web application and should start an embedded reactive web server    SERVLET - The application should run as a servlet-based web application and should start an embedded servlet web server

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If you need web functionality in your application  like org springframework web client RestTemplate for REST calls  but you don t want to start a TOMCAT server  just exclude it in the POM    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt exclusions gt           lt exclusion gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt  exclusion gt       lt  exclusions gt   lt  dependency gt

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For Kotling here is what I used lately       src main com blabla ShellApplication kt         Main entry point for the shell application       SpringBootApplication public class ShellApplication   CommandLineRunner       companion object            JvmStatic         fun main args  Array lt String gt                 val application   SpringApplication ShellApplication  class java              application webApplicationType   WebApplicationType NONE             application run  args                        override fun run vararg args  String            src main com blabla command CustomCommand kt   ShellComponent public class CustomCommand       private val logger   KotlinLogging logger          ShellMethod  Import  create and update data from CSV       public fun importCsv  ShellOption   file  String            logger info  Hi             And everything boot normally ending up with a shell with my custom command available

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The simplest solution  in your application properties file  add the following property as mentioned by a previous answer      spring main web-environment false   For version 2 0 0 of Spring boot starter  use the following property       spring main web-application-type none   For documentation on all properties use this link    https   docs spring io spring-boot docs current reference html common-application-properties html

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For Spring boot v2 1 3 RELEASE  just add the follow properties into application propertes   spring main web-application-type none

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If you want to use one of the  Getting Started  templates from spring io site  but you don t need any of the servlet-related stuff that comes with the  default    gs spring-boot   template  you can try the scheduling-tasks template  whose pom  contains spring-boot-starter etc  instead   https   spring io guides gs scheduling-tasks   That gives you Spring Boot  and the app runs as a standalone  no servlets or spring-webmvc etc are included in the pom   Which is what you wanted  though you may need to add some JMS-specific stuff  as someone else points out already       I m using Maven  but assume that a Gradle build will work similarly

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In Spring boot  Spring Web dependency provides an embedded Apache Tomcat web server  If you remove spring-boot-starter-web dependency in the pom xml then it doesn t provide an embedded web server  remove the following dependency  lt dependency gt      lt groupId gt org springframework boot lt  groupId gt      lt artifactId gt spring-boot-starter-web lt  artifactId gt   lt  dependency gt

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Spring boot has many starters  some starters have an embedded web server  some don t  The following have the embedded web server  spring-boot-starter-web spring-boot-starter-data-jpa spring-boot-starter-jetty spring-boot-starter-tomcat spring-boot-starter-jdbc spring-boot-starter-data-rest      Pick the one that meets your requirements and that does not have server support  I only need to make restful json api request in my spring application  so the starter I need is spring-boot-starter-json  which provide RestTemplate and jackson for me to use

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You can create something like this    SpringBootApplication public class Application     public static void main String   args        new SpringApplicationBuilder Application class  web false  run args           And   Component public class CommandLiner implements CommandLineRunner       Override   public void run String    args  throws Exception          Put your logic here          The dependency is still there though but not used

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Through program    ConfigurableApplicationContext ctx    new  SpringApplicationBuilder YourApplicationMain class   web WebApplicationType NONE   run args    Through application properties file    spring main web-environment false   Through application yml file    spring   main    web-environment false

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You can use the spring-boot-starter dependency  This will not have the web stuff   lt dependency gt     lt groupId gt org springframework boot lt  groupId gt     lt artifactId gt spring-boot-starter lt  artifactId gt   lt  dependency gt

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Similar to  nayun oh answer above  but for older versions of Spring  use this code   SpringApplication application   new SpringApplication DemoApplication class   application setApplicationContextClass AnnotationConfigApplicationContext class   application run args

[java] Spring Boot without the web server

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