Lerne die Grundlagen des Transaktionsmanagements in modernen Datenbanken kennen, und erfahre, wie du mit Spring Boot, Spring Data, JPA und Hibernate effektiv arbeitest. In diesem Tutorial starten wir mit den Grundlagen der Datenbanktransaktionen in deiner Anwendung: – Transaktionen starten: Dieses Video ist perfekt für Entwickler, die ihre Fähigkeiten in Spring Framework erweitern und transaktionssichere Anwendungen…
What is needed Setup an Azure AAD Application First we need an Azure AAD application which gives us the access to our AD users. The important part are the client id and the tenant id here: Add the web URIs which are allowed to use the OAuth2 login In the next step we have to…
Um weiterführende Konzepte besser nachvollziehen zu können, wollen wir uns in den Grundlagen Datenbanken mit Spring Boot, Isolation Level (Isolationsgrad) und Locks beschäftigen.
Häufig vergessen, oder nur teilweise gemacht. Timeouts tragen einen wesentlichen Bestandteil zur Stabilität und dem Ressourcenmanagement von Software bei. Insbesondere bei Microservices sollten diese immer richtig eingestellt sein. Timeouts spielen auch eine wesentliche Rolle in Bezug auf Transaktionen, Locks und Isolationslevel. Sollte man zudem den Zugriff auf die Datenbank auch Dritten gewähren, also nicht nur…
Why Quartz? motivation Spring comes already with an own timer and this is fine if we have very simple requirements and we don’t really care about state or on which pod the timer is actually running. To be more precise the timer/ job is running in each of our spring containers independently. Lets be honest,…
Problem As soon we have timers in our project they may cause issues in our integration tests, as they start running in the most undesirable situation. E.g. during the trigger a specific function which would usually be triggered by the timer. Solution In the easiest scenario if it is a in memory Spring test we…
Problem Some services don’t have an UI and the OpenAPI/ Swagger UI should be used as default UI of the service. As so the root should be redirected directly to the SwaggerUI. Solution Just add a WebMvc redirect. Swagger Open API dependencies Spring Boot 2.x Ensure you check the current version: Spring Boot 3.x Ensure…
Problem By default the Spring RestTempalte and the swagger OpenAPI client does an SSL check. This is usually not required on the test system, as so the goal is to remove the SSL check from the Spring Boot Rest Template. RestTemplate Apache HTTP Client pom.xml Swagger OpenAPI Client Furthermore sometimes it is required to remove…
Problem We want to combine Spring and Angular use the Angular developing features but also be able to use the Spring IDE, in the end, everything should be build using maven and nicely packed into a JAR.Let’s get started. Overview Less text more code get me to the source. Multi-Module project It may make sense…
The Problem Recently using MongoDB and Spring Data I encountered an interesting issue. Saving an Entity which was loaded by @DBRef(lazy = true) wasn’t possible together with the activated ValidatingMongoEventListener. Each time the following error occurred: javax.validation.ConstraintViolationException at org.springframework.data.mongodb.core.mapping.event.ValidatingMongoEventListener.onBeforeSave(ValidatingMongoEventListener.java:65) at org.springframework.data.mongodb.core.mapping.event.AbstractMongoEventListener.onBeforeSave(AbstractMongoEventListener.java:144) at org.springframework.data.mongodb.core.mapping.event.AbstractMongoEventListener.onApplicationEvent(AbstractMongoEventListener.java:90) at org.springframework.data.mongodb.core.mapping.event.AbstractMongoEventListener.onApplicationEvent(AbstractMongoEventListener.java:33) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:163) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:136) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:381) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:335) at org.springframework.data.mongodb.core.MongoTemplate.maybeEmitEvent(MongoTemplate.java:1633) at org.springframework.data.mongodb.core.MongoTemplate.doSave(MongoTemplate.java:986) at org.springframework.data.mongodb.core.MongoTemplate.save(MongoTemplate.java:933)…