spring-boot | Spring | Object-Relational Mapping library
kandi X-RAY | spring-boot Summary
kandi X-RAY | spring-boot Summary
Spring Boot是由Pivotal团队提供的全新框架，其设计目的是用来简化新Spring应用的初始搭建以及开发过程。该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。通过这种方式，Spring Boot致力于在蓬勃发展的快速应用开发领域（rapid application development）成为领导者。
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Top functions reviewed by kandi - BETA
- Gets json .
- Configure the scheduled tasks .
- Saves user information in the application .
- The default key generator .
- Beanciated .
- set value
- Saves the user .
- Handle exception .
- Creates a Docket that supports REST API .
- Parses the page and returns a map with the results
spring-boot Key Features
spring-boot Examples and Code Snippets
Community Discussions
Trending Discussions on spring-boot
QUESTION
I am trying to figure out is there any way to send failed records in Dead Letter topic in Spring Boot Kafka in Batch mode. I don't want to make the records being sent in duplicate as it's consuming in batch and few are already processed. I saw this link ofspring-kafka consumer batch error handling with spring boot version 2.3.7
I thought about a use case to stop container and start again without using DLT but again the issue of duplication will come in Batch mode.
@Garry Russel can you please provide a small code for batch error handling.
...ANSWER
Answered 2021-Jun-15 at 17:34The RetryingBatchErrorHandler was added in spring-kafka version 2.5 (which comes with Boot 2.3).
The listener must throw an exception to indicate which record in the batch failed (either the complete record, or the index in the list).
Offsets for the records before the failed one are committed and the failed record can be retried and/or sent to the dead letter topic.
See https://docs.spring.io/spring-kafka/docs/current/reference/html/#recovering-batch-eh
There is a small example there.
The RetryingBatchErrorHandler was added in 2.3.7, but it sends the entire batch to the dead letter topic, which is typically not what you want (hence we added the RetryingBatchErrorHandler).
QUESTION
I am trying to use JOOQ code generation from JPA Entity. I have already created a dedicated maven module where the code will be generated which has dependency on a module containing all entities as well code generation plugin with of jooq.
To add more clarify on project structure, here are the modules:(The names are made up but the structure reflects the current project i am working on)
...ANSWER
Answered 2021-Jun-02 at 07:53I'm assuming you have missing dependencies on your code generation class path. Once you update your question, I'll update my answer.
Regarding jOOQ code generation support for@TypeDef etc.
jOOQ won't support your generated composite types in generated code out of the box, you'll still have to add forced type configurations for that, possibly embeddable type configurations:
- https://www.jooq.org/doc/latest/manual/code-generation/codegen-advanced/codegen-config-database/codegen-database-forced-types/
- https://www.jooq.org/doc/latest/manual/code-generation/codegen-embeddable-types/
Note that the JPADatabase offers a quick win by integrating with simple JPA defined schemas very quickly. It has its caveats. For best results, I recommend going DDL first (and generate both jOOQ code and JPA model from that), because it will be much easier to put your schema change management under version control, e.g. via Flyway or Liquibase.
QUESTION
I am using spring-boot 2.2.7.RELEASE
In the controller I want to get some values from external config file. But the application does not start even though the properties are available in the external config.
could you suggest how to load only specific properties from external config.
NOTE: I also tried spring.config.additional-location, and it is not working
Thanks
Controller
...ANSWER
Answered 2021-Jun-15 at 10:31As per documentation, SpringApplication converts any command line option arguments (that is, arguments starting with --, such as --server.port=9000) to a property and adds them to the Spring Environment.
-D works when running via maven. Try: java -jar application.jar --spring.config.location=file:///C://your//path//config.yml.
Via maven: mvn spring-boot:run -Dspring.config.location="file:///C://your//path//config.yml"
QUESTION
Starting with the sample from https://docs.gradle.org/current/samples/sample_jvm_multi_project_with_code_coverage.html (i.e., the code here https://github.com/gradle/gradle/tree/master/subprojects/docs/src/samples/java/jvm-multi-project-with-code-coverage ) and simply adding Spring Boot by changing application/build.gradle to
ANSWER
Answered 2021-Jun-01 at 20:54Just do that and you will be fine (all external classes will be excluded):
QUESTION
I am not able to generate log file using log4j2 spring boot 2.4, it's only printing logs in eclipse console. I already tried multiple solutions provided across web like: exclusions, renamed file to log4j2, changed properties multiple times (some are not using log4j.xx and some are not using it) not sure what to do ?
properties file:
...ANSWER
Answered 2021-Jun-12 at 14:17Try changing the file path to another directory. Sometimes there are some permission issues for C drive.
QUESTION
I have a spring boot 2 app which connects to Mariadb database. This app runs in cloud foundry. It takes database connection properties from VCAP_* env variable.
App works fine and can connect to database. But, I have found out that app is not using hikari configuration specified in application.yml.
Can you please suggest what is wrong here?
build.gradle
...ANSWER
Answered 2021-Apr-02 at 13:45You are using the Spring Cloud Connectors library to create the database connection.
QUESTION
I am new to spring boot and trying to figure out some of its working. Here I am getting Null Pointer Exception for the below implementation. I am not sure can we use @Autowire annotation for a Library project without a Main class. Maybe this sounds stupid,I believe we can do a @ComponentScan for the Library Project from a Service project that's created.My Question is looking at the below implementation is there any possibility to use annotation in the below library project, because Annotations are throwing NullPointerException for the below code?
Library
The below code is a library and it Doesn't have a Main Class
...ANSWER
Answered 2021-Jun-14 at 15:53With SpringBootApplication annotation, It will create application context with all required beans when starting the application. The object will be injected whenever it needed.
But in the Normal java application, the Object will be created while calling the new keyword.
@SpringBootApplication it required when you have @Autowired annotation otherwise you will get error.
QUESTION
I have a Springboot project and I know I can send a application.properties file as a argument, but is this possible using a jar file?
I built my jar file using maven and in my application I have this piece of code that runs the programm if the user sent the argument run.
Is there any method that allows me to set the application properties if I receive it through argument? Or does the override of the file happens automatically as it does when I use the command
mvn spring-boot:run -Dspring.config.location=your.properties
ANSWER
Answered 2021-Jun-14 at 13:12For jar you can either pass one of the properties or the complete or its location as beow.
we can configure the location directly in the command line:
QUESTION
Without spring boot ,we must specify the detail of a data source,right?
...ANSWER
Answered 2021-Jun-14 at 08:59From DataSource Configuration in the docs:
Spring Boot can deduce the JDBC driver class for most databases from the URL. If you need to specify a specific class, you can use the
spring.datasource.driver-class-nameproperty.
So start without configuring anything and just putting the JDBC driver on the classpath. If it would not work, you can manually configure it.
QUESTION
I'm trying to run one test for my class "Sinus" (used to compute the sinus of a float), but when I try to run this test to generate my coverage report with Cobertura, it doesn't work and I really don't know why ! Dou you have advices or any explanation please ? (I use the cmd : mvn cobertura:cobertura)
-This is my test:
...ANSWER
Answered 2021-May-27 at 14:26Your test is a junit4-api based. But from your pom.xml you have junit5 dependencies.
Removing jupiter dependencies should do the trick.
Regarding cobertura, as you run on java 8 preferably you should migrate to JaCoCo as cobertura with java version higher than 7 is buggy.
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