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Hibernate 

Hibernate ORM is an object-relational mapping tool for the Java programming language. It provides a framework for mapping an object-oriented domain model to a relational database. Hibernate handles object-relational impedance mismatch problems by replacing direct, persistent database accesses with high-level object handling functions.

Jakarta EE/ Eclipse MicroProfile 

Eclipse MicroProfile is a semi-new community dedicated to optimizing the Enterprise Java mission for microservice-based architectures. Now Enterprise Java has been standardized under the Eclipse Foundation as Jakarta EE.

Templates 

Payara 

Payara Micro is an Open Source, lightweight Java EE (Jakarta EE) microservices deployments.

Templates 

References 

Article Links
Search Source
NoSQL Source
JPA Source
Hello World Source

Quarkus 

QuarkusIO, the Supersonic Subatomic Java, promises to deliver small artifacts, extremely fast boot time, and lower time-to-first-request.

Templates 

References 

Article Links
Panache MongoDB Source
Command Mode Application Source
Hibernate Search With Elasticsearch Source
PostgreSQL With Panache Source
PostgreSQL with JPA Source
Hello World Source

Spring 

The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform. Platform.sh is flexible, and allows you to use Spring Framework in several flavors such as Spring MVC and Spring Boot.

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References 

Article Link
Spring Data MongoDB Reactive Source
Spring Webflux Source
Spring Data Redis Source
Spring with Gradle Source
Spring Data ElasticSearch and Spring Data Sorl Elasticsearch and Solr
Spring MVC and Spring Data MongoDB Source
Spring Boot and Spring Data JPA Source

Tomcat 

Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language and WebSocket technologies.

Templates 

Micronaut 

Micronaut is a modern, JVM-based, full-stack framework for building modular, easily testable microservice and serverless applications.

Templates 

References 

Article Source
Hello World Source
JPA Source
Micronaut Data Source
MongoDB Source