I am trying to make a filedownload endpoint for my ftp server. I see that there is a Spring boot integration starter module for Spring boot but this module doesen't contain classes like DefaultFtpSessionFactory . I've read on the web that there are other modules available like Spring integration http and Spring integration ftp. However, these are not spring boot modules. Is it save to include those modules in my POM anyway? Or shoulden't I use Spring boot starter integration in the first place?
I see in this example: https://blog.pavelsklenar.com/spring-integration-sftp-upload-example/ That the author is using spring boot next to Spring Integration 4.3.8 regular Spring. He does say those are managed by Spring boot but i'm not exactly sure what he means by that.
Can anyone tell me what modules I should include if I want to make the download function? Thanks
Since it's unlikely that an application would require all Spring Integration modules (ftp, sftp, http, mqtt, ... etc), the starter only includes the core and java dsl jars on the classpath (in Spring Integration 5.0, the DSL is built in so boot 2.0 only includes the core jar).
Otherwise, you'd end up with many jars on the classpath that you don't need.
So, yes, you have to manually add the dependencies you need...
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-ftp</artifactId>
</dependency>
Note that you don't need a <version/> - boot will manage that for you and bring in the right version corresponding to the core.
The modules themselves will bring in any additional transitive dependencies they need. So you just need to add the top level module(s) to your pom.
Related
I want to develop my springboot configuration module.
For example, I want to the behaviors of serialization and deserializion consistent in the Spring ConverterSPI and JsonHttpMessageConverter/XmlHttpMessageConverter.
So,i try to register all converters in Spring ConverterSPI to global configuration JsonHttpMessageConverter/XmlHttpMessageConverter provides.
And decide whether to open by configuration.
For this spring-boot configuration module, I don't want to rely on the spring-boot version.
Otherwise, the actual spring-boot project needs to exclusion the transitive dependencies spring boot when introducing this module.
How to achieve this goal?
I have a Spring Boot RESTful microservice that a customer would like to nest inside their Spring Boot application.
Could someone tell me whether this is possible?
I was hoping this would be as simple as adding a dependency on my application in the customers maven pom file and then excluding the tomcat dependency since the customer already uses the embedded tomcat.
Thanks,
Ben
Since they already use Spring Boot to start their app, you can simply mark all Spring Boot dependencies as provided in your Maven POM, this would exclude it from the JAR as well as embedded Tomcat and all related dependencies. Also make sure you don't build your JAR as a Spring Boot executable (should be the default if you're not using the spring-boot-maven-plugin).
On the customer side, they would need to include your JAR as a dependency, and possibly add a scanBasePackages property to their #SpringBootApplication, to auto-discover your application classes, if they don't reside in a package under the one that #springBootApplication is on. Also, they'll need to be mindful of any URI collisions between your app and theirs, as the two will be sharing the same environment.
I want to create a jar file that I can add to a classpath and will basically "plug-in" to an existing spring boot application. I need it to be able to have annotations of Component, ConfigurationProperties, and all the fun things that spring boot gives you, but I want it "thin" and it will be a jar file used as part of a full spring boot web application.
I need the jar file to be externally configurable. Property files will be different for different deployments. So having a working #Configuration annotation is critical.
I look at spring-boot-starter-parent, and that has jetty, tomcat, hibernate stuff and is a huge jar file. I don't want that.
Is there a "thin" parent?
Is spring boot simply not what I want here? And I should just use a regular spring project and set my "Main" spring boot web app to do component scans to configure the jar file?
It sounds like you are trying to define your own Spring Boot Starter. That's the real power that Spring Boot gives you, the ability to include a dependency and have it auto-configure itself.
By packaging your jar the right way, Spring Boot will detect that there are configurations, components, and property files automatically. I've used this in the past for the case where I want all of my applications to log a specific way, or enforce a certain format for my REST endpoints.
The documentation gives a very thorough overview of the steps you'll need to take. But essentially, you are going to package your jar like any other (with your #Bean, #Component, #Service, and #Configuration classes in it), and provide a property file pointing to the configurations:
// Example spring.factories file
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.mycorp.libx.autoconfigure.LibXAutoConfiguration,\
com.mycorp.libx.autoconfigure.LibXWebAutoConfiguration
Also check out the set of #ConditionalOn... annotations, they can really help with controlling what beans become active based on properties being defined, profiles being active, or dependencies being loaded.
I am currently working with Spring Boot with a number of starter packs, such as the web MVC framework, Thymeleaf templates and security.
Each of these packages have a lot of different configuration options. I have mainly been using the source from the Auto-configuration package to figure out which beans need to be wired up and how to do that.
However, Is there any easy way to find a list of expected beans/classes that are needed by a given Spring package?
To view the beans you can you spring boot actuator
To Enable actuator, you can simply add the actuator starter dependency to your project.
For Gradle
compile("'org.springframework.boot:spring-boot-starter-actuator:1.3.1.RELEASE'
")
For Maven
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>1.3.1.RELEASE</version>
</dependency>
You can skip the version if you are using spring boot parent pom
Now you can rebuild your application make get request to http://server:port/beans if local and port is 8080 then
http://localhost:8080/beans
If you want to access using CURL command line tool you can
curl http://localhost:8080/beans
For more information visit
http://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-endpoints.html
I am trying to understand the difference between spring boot and spring boot web. From this boot tutorial the pom contains spring boot as the parent and spring boot web as a dependency like so:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
What are the uses for the 2 different versions? Do you always use them together? This spring boot documentation tells me if the program is production ready to use:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
But if that's the case then why isn't there one for web like so:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-actuator</artifactId>
</dependency>
</dependencies>
There are lots of these different 'starter' poms for spring boot. Each one of them tells maven to bring in the dependencies needed for that particular functionality. So spring-boot-starter-web brings in all the stuff needed for MVC and autoconfigures it with sensible defaults. The real trick to spring boot is it when it autoconfigures things it uses a whole of #ConditionalOnClass or other such annotations that look at what dependencies are on the classpath and provides configuration for those dependencies. What this means is when you have that spring boot actuator starter, when it's doing its autoconfiguration it will look at what other spring boot start poms you have in your pom.xml and it will configure different endpoints for the actuator so you can see the various metrics the actuator provides for that particular module.
Spring Boot is a framework, spring-boot-starter-web is one of the packages that comes with it, a jar file.
Just like JDK is a library, and util is one of the packages included in the JDK.
From: https://docs.spring.io
Spring Boot provides a number of “Starters” that auto-configures your application adds jars to your classpath. The spring-boot-starter-parent is a core starter that provides useful maven defaults. It also provides a dependency-management section so that if you import additional starters then you can omit version tags for “blessed” dependencies. Therefore you should only need to specify the Spring Boot version number on this dependency
Starters are a set of convenient dependency descriptors that you can include in your application considering each starter covers a specific area.The starters contain a lot of the dependencies that you need to get a project up and running quickly and with a consistent, supported set of managed transitive dependencies.For example, if you want to get started using Spring and JPA for database access, just include the "spring-boot-starter-data-jpa" dependency in your project, and you are good to go.
Spring Boot
spring-boot-starter-web is starter for building web, including RESTful, applications using Spring MVC. It uses Tomcat as the default embedded container
Spring Boot has different groups of starters like
1-Spring Boot application starters: spring-boot-starter-web , spring-boot-starter-jdbc , spring-boot-starter-jpa etc
2-Spring Boot production starters : spring-boot-starter-actuator which provides production ready features to help you monitor and manage your application
3-Spring Boot technical starters: spring-boot-starter-jetty , spring-boot-starter-tomcat these starters can be used to exclude or swap specific technical facets
1.spring-boot-starter-parent deals with the auto start of main method and run methods so on..
2.and spring-boot-starter-web deals with the spring MVC things like controller, autowired so on.. Hope this helps..
Spring boot is a very cool tool of Spring Source. In many conference the team talck about of Spring Boot as one of the three DSR(Domain Specific Run-Time) of Pivotal.... Spring Boot, Spring XD and Grails(now Pivotal didn't support Groovy & Grails).
That said compare Spring boot stand alone and Spring boot web enviroment may be a cool conversation. First of all Spring boot give you many production ready istruments such as actuator(avaiable whit sprin boot in web enviroment), spring remote shall and so on. The main difference is the same of had a spring stand-alone context or a Spring web context. Of course some of the potentiality that yon could have are avaiable in a web context, Actuator is an example. but the main difference is in what kind of application you need, web or stand-alone.