IntelliJ 15, SpringBoot devtools livereload not wo

Question

Having issues with the new LiveReload feature with Spring Boot devtools 1.3. It doesn't reload on class changes. I've seen it demo'd with IntelliJ @ Devoxx 2015. Is there some IDE setting I need to have enabled? I'm running via the IDE and not through Gradle. I tried enabling "Make project automatically" which doesn't seem to help.

It seems to load correctly and is looking in the correct path

2015-11-23 05:55:30.592 DEBUG 4700 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Starting application com.myapp.Application with URLs [file:/E:/Projects/myapp/build/classes/main/, file:/E:/Projects/myapp/build/resources/main/]

My files

build.gradle

buildscript {
    ext {
        springBootVersion = '1.3.0.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") 
    }
}

apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'idea'
apply plugin: 'spring-boot' 
apply plugin: 'war'


war {
    baseName = 'myapp'
    version = '0.0.1-SNAPSHOT'
}
sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
    maven { url "https://repo.spring.io/milestone" }
}

configurations {
    providedRuntime
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-actuator')
    compile('org.springframework.boot:spring-boot-devtools')
    compile('org.springframework.boot:spring-boot-starter-jdbc')
    compile('org.projectlombok:lombok')
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('net.sourceforge.jtds:jtds:1.3.1');
    testCompile('org.springframework.boot:spring-boot-starter-test') 
}

dependencyManagement {
    imports { 
        mavenBom "org.springframework.cloud:spring-cloud-starter-parent:Brixton.M3" 
    }
}


eclipse {
    classpath {
         containers.remove('org.eclipse.jdt.launching.JRE_CONTAINER')
         containers 'org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8'
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.7'
}

HelloWorldController

@Controller
public class HelloWorldController {

    @RequestMapping("/")
    @ResponseBody
    String home(){

        return "Hello World test";
    }
}

Answer 1

I am guessing you are coding and expect DevTools to auto-magically figure out you have changed something in your project? Devtools does that by watching your classpath folder(s). When a .class file (or a resource) has changed, devtools take the appopriate action.

If you don't see anything, that's probably because you're just coding and not updating the classpath. You have to invoke Make Project to update the classpath. See the documentation

Answer 2

I've been facing this problem a lot on last months on my MAC. Even when following these steps listed here like checking "Make Project Automatically" and "Compiler Automake".

However at my Job, where we use Windows, it works perfectly when I do follow these steps.

The solution for this problem on a MAC I found though is to add a new Run Configuration (Press ⌃⌥R, then press 0) then add a new Maven configuration. On the "Command line" input set "spring-boot:run". Press "Apply" and "Ok" and run the project by selecting the new configuration created.

Of course you could just open a new terminal and just type "mvn spring-boot:run" it will work too.

Answer 3

This worked for me. Add the below line in application.properties file,

    spring.devtools.restart.enabled=true

Answer 4

LiveReload and restart are different features. Livereload allows you to detect changes in resources/static folder and notify browser that files changed and the page should be reloaded.

Your question describes Restart scenario. If you want your application to reload automatically on *.class-files changes, make sure your IDE outoputs compiled classes to:

build\classes\main

In Intellij go to Project Structure (Ctrl+Alt+Shift+S) and setup project compiler output dir. After this you can make changes in your classes and press Ctrl+Shift+F9 to recompile current class or hit Ctrl+F9 to recompile the whole project. Spring Boot Devtools will detect changes in build\classes\main and perform restart of your application automatically.

If you want to enable LiveReload for your static assets add the following (otherwise you won't see cahnges of static content while executing bootRun goal):

bootRun {
    addResources = true
}

Answer 5

From the documentation here

As DevTools monitors classpath resources, the only way to trigger a restart is to update the classpath. The way in which you cause the classpath to be updated depends on the IDE that you are using. In Eclipse, saving a modified file will cause the classpath to be updated and trigger a restart. In IntelliJ IDEA, building the project (Build → Make Project) will have the same effect.

Answer 6

if you use IntelliJ IDEA, adding the spring-boot-devtools is not enough. This is because unlike Eclipse, you need to explicitly tell IntelliJ IDEA to “Make The Project” for it to build to the target classpath.

see on youtube

The easiest solution: run app debug mode and press Ctrl + f9 (short-cut for build)

or

1. You need to enable the “Make project automatically” option. You can find it in Settings – Build, Execution, Deployment – Compiler
2. To open the registry, just press SHIFT+CTRL+A. In the registry window, enable the “compiler.automake.allow.when.app.running” check-box.