Why spring-boot-build parent dependency is missig? - spring

I know that when I am inheriting from spring-boot-starter-parent I'll have this inheritance chain:
my-project => spring-boot-starter-parent => spring-boot-dependencies => spring-boot-build => maven parent pom
=>(means inherit)
Indeed That's what I saw in Github. And I believe It is true.
But when I am navigating through these POMs on my IDE (IntelliJ) the spring-boot-dependencies does not declare a parent pom (which should be spring-boot-build according to GitHub)
Why there is no inheritance specified in spring-boot-dependencies in my IDE(there is one GitHub)? I am missing something?
Edit
My project's pom:
<?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>2.2.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

It doesn't show the parent POM relation in your IDE, because in the pom file for spring-boot-dependencies, that's deployed to the central Maven repository, there is no parent tag: https://search.maven.org/artifact/org.springframework.boot/spring-boot-dependencies/2.2.0.RELEASE/pom
Eclipse will load that pom file, not the one from the source repository.
So it looks that the build process from Spring Boot removes the parent tag, when it's deploying the pom to Maven Central.
A reason for this could be (and the naming suggests it), that spring-boot-build only provides configuration and dependencies related to the build process for Spring Boot itself, but isn't necessary or desired for applications using it.

Related

Maven fails to compile spring-boot empty project

I have downloaded a spring-boot empty project from Spring Initializr and when compiling it gives me the following error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project demo: There are test failures.
I've tried with both jdk 8 and 12, looks like it doesn't change anything.
Here is my pom.xml
<?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>2.1.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
I've already read all the similar topics here but my problem is different. I have to use Maven and have not added any plugin yet.
I've solved cleaning the Windows registry editor autorun of xampp.

Spring-boot(maven) actuator,devtools not working

I'm a newbie to spring-boot. Trying to create a simple web application using spring-boot maven. Basic static page display using dependency spring-boot-starter-web worked fine. When I included spring-boot-devtools and spring-boot-starter-actuator in pom.xml it is giving build error Re-run Maven using the -X switch to enable full debug logging.
I tried including spring-webmvc dependency in pom file, still the result is same.
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.test</groupId>
<artifactId>jspTest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>jspTest</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin
</artifactId>
</plugin>
</plugins>
</build>
I downloaded this project from spring.io (SPRING INITIALIZR website). Build project is getting failed.
<scope>runtime</scope> of spring-boot-devtools suppose not to be runtime. In fact according to the doc -
Developer tools are automatically disabled when running a fully
packaged application. If your application is launched from java -jar
or if it is started from a special classloader, then it is considered
a “production application”. Flagging the dependency as optional in
Maven or using a customdevelopmentOnly configuration in Gradle (as
shown above) is a best practice that prevents devtools from being
transitively applied to other modules that use your project.
So, change the dependency as below -
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
you can update your pom.xml and change the version number to any previous stable version.It worked for me.
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>**xyz_previous_.RELEASE**</version>
<relativePath/> <!-- lookup parent from repository -->

What dependency is missing from this Spring Boot Application?

I would like to create a Spring boot Web application with H2 database and JPA support. But STS throws an error at pom.xml overview :
Missing artifact org.springrfamework.boot:spring-boot-test.jar:1.5.6.RELASE (Click for 49 more)
Here is my pom.xml , I have no idea what's the problem.
<?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>data-demo-CS</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Actually your ide not getting the dependency, you should clean build again and if still showing error then simply remove that dependencies from your local repository (I. e. ./.m2 if using maven) and clean build your project again then all required dependencies will be downloaded I your local.
Command mvn clean compile package install

Spring Boot Application cannot be resolved to a type but I imported it in pom.xm

I have added the spring boot in pom.xml but still it is giving an error.
Can anyone help me.
It is giving error The import org.springframework.boot.autoconfigure.SpringBootApplication cannot be resolved
and
SpringBootApplication cannot be resolved to a type
My pom. xml is
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.webapp</groupId>
<artifactId>proj1</artifactId>
<packaging>war</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<version>0.0.1-SNAPSHOT</version>
<name>proj1 Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>proj1</finalName>
</build>
</project>
Your pom looks almost correct, but few things to note
No need to add dependency 'javax.servlet-api', it is available from 'spring-boot-starter-web'
And you probably you may be missing the 'spring-boot-maven-plugin', it is not compulsory but you may want that in your project. Where it provides some easy maven goals for you to run.
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
if your running eclipse you can generate your .classpath files just as usual
mvn eclipse:eclipse, once done your ide should look fine
then mvn spring-boot:run should set your application running

Spring Boot multi module Maven project deployment

We have multi module Maven project with following modules:
Commons
Model
Repository
Service
Web
We've googled around and we didn't found a solution how to make one executable jar when project has this kind of structure.
Here is the parent pom.xml:
<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>...</groupId>
<artifactId>...</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
<module>Model</module>
<module>Web</module>
<module>Service</module>
<module>Repository</module>
<module>Common</module>
</modules>
<packaging>pom</packaging>
<name>Api</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<mssql.jdbc.driver.version>4.2</mssql.jdbc.driver.version>
<apache.commons.lang.version>3.3.2</apache.commons.lang.version>
<apache.commons.collection.utils.version>4.1</apache.commons.collection.utils.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-envers</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
So, very basic parent pom.xml. We know that we can't use Spring Boot Maven plugin when packaging is pom, so we've defined it in pom.xml from Web module:
<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">
<parent>
<artifactId>...</artifactId>
<groupId>...</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>...</groupId>
<artifactId>...</artifactId>
<packaging>jar</packaging>
<name>...</name>
<dependencies>
<dependency>
<groupId>...</groupId>
<artifactId>Service</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.4.1.RELEASE</version>
<configuration>
<mainClass>...App</mainClass>
</configuration>
<!--<executions>-->
<!--<execution>-->
<!--<goals>-->
<!--<goal>repackage</goal>-->
<!--</goals>-->
<!--</execution>-->
<!--</executions>-->
</plugin>
</plugins>
</build>
</project>
The rest of pom.xmls from other modules are pretty much the same: Service's pom.xml includes Repository.jar, Repository includes Model and Common.
Problem 1: when we run mvn install, plugin creates fat jar in target folder of web module. But when we try to run it with java -jar name-of-jar it gives java.lang.NoClassDefFoundError about some class from Service module - and you can see from Web's pom.xml that Service module is included (there is also a Service.jar packed as library in Web.jar)
Problem 2: what's interesting is that Service.jar inside of Web.jar also contains pretty much all the dependencies that are already present in Web.jar - basically they are duplicated.
Did anyone managed to create executable fat jar using Spring Boot Maven plugin and Maven Module project structure?
Problem 1 & 2
You should not have devtools as dependency in your parent pom.
Move the following to the web/spring-boot module:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
If you look at devtools's pom, it includes the following:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
So your service jar ends up with some spring boot dependencies.

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