Spring Boot 2.x Latest Version

[Shameka Cretsinger]

Lookingfor a simple pom.xml for spring boot based camunda enterprise edition alone.

The examples I have come across are having 2 many details for keeping it flexible for all which is confusing. I do have EE license which I can incorporate in the subsequent build.

NOTE: this is for a Spring Boot library as opposed to a Spring Boot application, so I am not doing id("org.springframework.boot") in the plugins, and instead using the SpringBootPlugin.BOM_COORDINATES.

Besides that, with the plugins block and an in-script configuration it simply cannot work.

The plugins block is evaluated first separtely and isolated, so nothin in the build script can give information to the applied plugin.

One solution as you suggested yourself is to use apply false and then use apply after the property is set.

But of course this is feeling awkward and looking ugly.

And if a consumer uses Kotlin DSL, he will miss the generated type-safe accessors, as those are only generated for plugins actually applied using the plugins block.

So indeed if you really need this writing the version to gradle.properties is probably the best way.

Also to add to the discussion re: spring-boot-dependencies;

@Vampire I do use the platform BOM, although please understand that the official tooling and documentation still uses io.spring.dependency-managementplugin and the following block:

In your example for example, if the stooges variable is just for usages within the script, then define it like that using def stooges = .... If it should be available on the project for external usage, then better add a proper extension, then you also have proper type-safe support, especially when someone uses Kotlin DSL.

It could well be that the buildEnvironment task is not picking this up.

Afair the special handling of buildSrc makes it not taking part in conflict resolution but just overwrite versions by puttting them to a class loader higher in the hierarchy.

To manually verify, easiest is to get the version from classes in that plugin if it provides the version somehow.

If not, then maybe get the Class instance of a class in it, get the class loader and then look at the URLs in that class loader to see which JAR the class was loaded from.

Camel support for Spring Boot provides auto-configuration of the Camel and starters for many Camel components. Our opinionated auto-configuration of the Camel context auto-detects Camel routes available in the Spring context and registers the key Camel utilities (like producer template, consumer template and the type converter) as beans.

There is a curated camel-spring-boot-dependencies which is a generated BOM that has adjusted the JARs that both Spring Boot and Apache Camel may use to use single shared version that will not conflict. This BOM is what is used to test camel-spring-boot itself. However Spring Boot users may want to use pure Camel dependencies and hence why you can use camel-spring-boot-bom that only has the Camel starter JARs as managed dependencies. This may lead to a classpath conflict if a 3rd party JAR from Spring Boot is not compatible with a Camel component.

To ensure the Spring Boot application keeps running until being stopped or the JVM terminated, typically only need when running Spring Boot standalone, i.e. not with spring-boot-starter-web when the web container keeps the JVM running, set the camel.springboot.main-run-controller=true property in your configuration. For example in application.properties.

Each starter lists configuration parameters you can configure in the standard application.properties or application.yml files. These parameters have the form of camel.component.[component-name].[parameter]. For example to configure the URL of the MQTT5 broker you can set:

"Spring Boot" project packs a lot of dependencies underneath thathave been tested and well work together. This speeds up the developmentprocess and helps us achieve results faster. However, in some cases, weneed to know what those dependencies are. One of the cases that I runfrom time to time is when I need to determine whether some specificspring boot version is affected by a vulnerability caused by one or moreof its dependencies. In some cases, it can be "Spring Core" frameworkwhile other's can be log4j (as it happened some time ago).Another situation is when I need to know whether Spring Boot has thatparticular dependency so that I can use Spring's tested version ratherthan explicitly specifying my own.

Using this search.maven.orglink go to maven central, choose your Spring Boot version in thedropdown at the top, and use the browser search for your dependency,e.g. for "Spring Core" it would bespring-framework.version

spring-boot-dependencies is a .pom filewhich is also called "Bills of Materials" (BOM). It contains alist of dependencies for a particular "Spring Boot" version that weretested and work well together. By default, all projects "inherit" thisconfiguration allowing "Spring" to provide sensible defaults. This is agood example of Convention over configuration approach where"Spring" allows your code to bootstrap without the need to specify eachlibrary version explicitly and ensure there wouldn't be any error whileworking with imported artifacts.

It's important to note that spring-boot-dependenciesdoesn't pull any jar's by itself but rather simplylists libraries and their versions. When a dependency is added to aproject the build tool (Maven or Gradle) will use the internal logic toscan through BOM to download a "Spring Approved" version and add it tothe classpath of a codebase.

I think the reason to split parent anddependencies poms is a "separation of concerns". While thesole purpose of the latter is to provide a list of dependencies thefirst has to do a couple more things such as specifying source encoding,resource filtering (properties file), plugin configuration, etc. Moreinformation on what parent is doing can be found here.

Lastly, I want to quickly go over the build tool difference when itcomes to using BOM. I have mentioned the "inheriting from pom" conceptwhich is 100% applicable to "Maven". We can see that in our project:

Even though it may not be intuitive, I hope this article helped youquickly solve the problem of finding your Spring Core version and gaveyou more insights into the mechanism of "library resolving" insideSpring.

Anyhow, the main error message I receive goes as follows:

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:3.0.1:run (default-cli) on project mySpringDemo: Execution default-cli of goal org.springframework.boot:spring-boot-maven-plugin:3.0.1:run failed: Unable to load the mojo 'run' in the plugin 'org.springframework.boot:spring-boot-maven-plugin:3.0.1' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: org/springframework/boot/maven/RunMojo has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [sample.connect.spring.basic.AddonApplication]; nested exception is java.io.FileNotFoundException: class path resource [org/springframework/boot/autoconfigure/web/AbstractErrorController.class] cannot be opened because it does not exist

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The Spring Framework is a programming and configuration model that streamlines Java application development. Spring streamlines the "plumbing" of applications by using dependency injection. Many developers like Spring because it makes building and testing applications more straightforward. Spring Boot extends this handling of the plumbing with an eye toward web application and microservices development. Spring Data is a programming model and framework for accessing datastores like Azure Cosmos DB from the context of a Spring or Spring Boot application.

This project supports multiple Spring Boot Versions. Visit spring boot support policy for more information. Maven users can inherit from the spring-boot-starter-parent project to obtain a dependency management section to let Spring manage the versions for dependencies. Visit spring boot version support for more information.

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