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Spring Boot, Spring Booted, Eclipse, a basic Maven example

I found that the basic example of installing Spring Boot with Spring Loaded does not work as per the documentation. I followed the instructions http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#getting-started-first-application to create a basic application, the only difference is that I put my class into the package and used the release version of the parent pom. The application works fine. Then I added Spring loaded into the pom file as described in doco.

I am running the application with mvn spring-boot: run.

Change my controller output, for example. "Hello World" for "Hello me" is not a hot reboot.

I tried working as a java application with the javaagent command-line option described elsewhere, but this does not work either.

Pom looks like this:

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>myproject</artifactId>
<version>0.0.1-SNAPSHOT</version>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.2.0.RELEASE</version>
</parent>

<!-- Additional lines to be added here... -->
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <dependencies>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>springloaded</artifactId>
                    <version>1.2.1.RELEASE</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

The compiled classes are here: project_dir \ target \ classes (I use Eclipse and the m2e plugin).

Launch Log:

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building myproject 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] >>> spring-boot-maven-plugin:1.2.0.RELEASE:run (default-cli) @ myproject >>>
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ myproject ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ myproject ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to C:\dev\src\scrapi\target\classes
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ myproject ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\dev\src\scrapi\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ myproject ---
[INFO] No sources to compile
[INFO] 
[INFO] <<< spring-boot-maven-plugin:1.2.0.RELEASE:run (default-cli) @ myproject <<<
[INFO] 
[INFO] --- spring-boot-maven-plugin:1.2.0.RELEASE:run (default-cli) @ myproject ---

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.2.0.RELEASE)

2015-01-02 13:23:25.311  INFO 2180 --- [.Example.main()] first.Example                            : Starting Example on DEFRAVD804016 with PID 2180 (C:\dev\src\scrapi\target\classes started by john in C:\dev\src\scrapi)
2015-01-02 13:23:25.359  INFO 2180 --- [.Example.main()] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@44354005: startup date [Fri Jan 02 13:23:25 CET 2015]; root of context hierarchy
2015-01-02 13:23:26.193  INFO 2180 --- [.Example.main()] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'beanNameViewResolver': replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]]
2015-01-02 13:23:27.121  INFO 2180 --- [.Example.main()] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8182/http
2015-01-02 13:23:27.689  INFO 2180 --- [.Example.main()] o.apache.catalina.core.StandardService   : Starting service Tomcat
2015-01-02 13:23:27.691  INFO 2180 --- [.Example.main()] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.0.15
2015-01-02 13:23:27.814  INFO 2180 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2015-01-02 13:23:27.814  INFO 2180 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 2457 ms
2015-01-02 13:23:28.653  INFO 2180 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean        : Mapping servlet: 'dispatcherServlet' to [/]
2015-01-02 13:23:28.657  INFO 2180 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2015-01-02 13:23:28.657  INFO 2180 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]
2015-01-02 13:23:28.883  INFO 2180 --- [.Example.main()] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@44354005: startup date [Fri Jan 02 13:23:25 CET 2015]; root of context hierarchy
2015-01-02 13:23:28.995  INFO 2180 --- [.Example.main()] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto java.lang.String first.Example.home()
2015-01-02 13:23:28.997  INFO 2180 --- [.Example.main()] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2015-01-02 13:23:28.998  INFO 2180 --- [.Example.main()] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],methods=[],params=[],headers=[],consumes=[],produces=[text/html],custom=[]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest)
2015-01-02 13:23:29.112  INFO 2180 --- [.Example.main()] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-01-02 13:23:29.112  INFO 2180 --- [.Example.main()] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-01-02 13:23:29.160  INFO 2180 --- [.Example.main()] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-01-02 13:23:29.268  INFO 2180 --- [.Example.main()] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2015-01-02 13:23:29.394  INFO 2180 --- [.Example.main()] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8182/http
2015-01-02 13:23:29.399  INFO 2180 --- [.Example.main()] first.Example                            : Started Example in 4.417 seconds (JVM running for 11.803)

What do I need to do to make Spring Loaded work in this case?

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3 answers

OK. I have at least a workaround that I stumbled upon. Hope this helps someone to work out exactly what is happening. Summary: It works when the debugger is configured in pom.

I wanted to enable debugging, so I added the following to pom, as described in the doco plugin :

<configuration>
  <jvmArguments>
    -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005
  </jvmArguments>
</configuration>

, , spring:

[INFO] Attaching agents: [C:\dev\maven_local\org\springframework\springloade
d\1.2.1.RELEASE\springloaded-1.2.1.RELEASE.jar]
Listening for transport dt_socket at address: 5005

, , ( ? EDIT: , , , . , , ). , spring . ( , ), , , , !

@DaveSyer . , , , , , , .

+1

spring, . " ", . , :

/ eclipse.

Debug Configuration Dialog

Java Application . App . , , project main class .

basic settings

VM arguments -javaagent:<spring_loaded_jar_file_path> -noverify. spring , repo ./gradlew.

VM Arguments

A gradle build script , "./gradlew build" - - : springloaded/build/libs/springloaded-1.1.5.BUILD-SNAPSHOT.

. , eclipse. java, .

Debug - view stream

, javaagent.

JVM Properties

, , .

+1

Spring Loaded Spring Boot Maven:

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <dependencies>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>springloaded</artifactId>
                    <version>${spring-loaded.version}</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

Spring Loaded Spring Cloud.

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Source: https://habr.com/ru/post/1569524/

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