JDBI
javalin.github.io
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JDBI | javalin.github.io | |
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27 | 27 | |
1,901 | 35 | |
0.9% | - | |
9.4 | 8.2 | |
11 days ago | 11 days ago | |
Java | HTML | |
Apache 2.0 license | - |
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JDBI
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Permazen: Language-natural persistence to KV stores
While this may work for greenfield applications, I don't see this working well for preexisting schemas. From their getting started page: "Database fields are automatically created for any abstract getter methods", which definitely scares me away since they seem to be relying on automatic field type conversions.
I prefer to manage my schemas when I can and do type and DAO conversions via mapper classes in the very simple and elegant JDBI framework where you write SQL annotations above your DAO methods https://jdbi.org/#_declarative_api
JDBI does wonders for wonky old schemas you've inherited, since joins etc work out of the box (just throw them in your annotations!) The annotations can also link to .SQL files for the big hairy queries.
All these "do magic" frameworks (hibernate being one of the first) work in the simple cases but then fall apart whenever you need to do anything complex/not-prescribed. I end up having to dig into the internals of the framework to see what's going wrong which negates their whole value add.
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Is ORM still an anti-pattern?
> I've been doing ORM on Java since Hibernate was new, and it has always sucked.
Have you ever looked at something like myBatis? In particular, the XML mappers: https://mybatis.org/mybatis-3/dynamic-sql.html
Looking back, I actually quite liked it - you had conditionals and ability to build queries dynamically (including snippets, doing loops etc.), while still writing mostly SQL with a bit of XML DSL around it, which didn't suck as much as one might imagine. The only problem was that there was still writing some boilerplate, which I wasn't the biggest fan of.
Hibernate always felt like walking across a bridge that might collapse at any moment (one eager fetch away from killing the performance, or having some obscure issue related to the entity mappings), however I liked tooling that let you point towards your database and get a local set of entities mapped automatically, even though codegen also used to have some issues occasionally (e.g. date types).
That said, there's also projects like jOOQ which had a more code centric approach, although I recall it being slightly awkward to use in practice: https://www.jooq.org/ (and the autocomplete killed the performance in some IDEs because of all the possible method signatures)
More recently, when working on a Java project, I opted for JDBI3, which felt reasonably close to what you're describing, at the expense of not being able to build dynamic queries as easily, as it was with myBatis: https://jdbi.org/
That said, with the multi-line string support we have in Java now, it was rather pleasant regardless: https://blog.kronis.dev/tutorials/2-4-pidgeot-a-system-for-m...
I don't think there's a silver bullet out there, everything from lightweight ORMs, to heavy ORMs like Hibernate, or even writing pure SQL has drawbacks. You just have to make the tradeoffs that will see you being successful in your particular project.
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Sketch of a Post-ORM
I found JDBi[1] to be a really nice balance between ORM and raw SQL. It gives me the flexibility I need but takes care of a lot of the boilerplate. It's almost like a third category.
1. http://jdbi.org
- Is it just me, or does the Spring Framework lead to hard-to-maintain code and confusion with annotations?
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Can someone tell me a good resource to learn and practice JDBC in java?
You could use something like jdbi or mybatis. It's not as ugly as raw jdbc and easier to use without all of the gunk from an ORM like hibernate.
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Which JVM Language Would You Choose for a New Server-Side Project?
We use JDBI. Very simple and lightweight. It uses an object mapper not a full fledged ORM.
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Why people don't like Java?
Alternatively there are... hybrid solutions like Kotlin's https://github.com/JetBrains/Exposed or https://jdbi.org/ that don't quite... do all the heavy lifting for querying but allow you to sorta stitch queries together manually.
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Top 5 Server-Side Frameworks for Kotlin in 2022: Micronaut
As seems that Micronaut does not include anything similar by default, we use JDBI and that SQL to retrieve one random greeting from the greetings table.
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Fiz um mapa interativo com os resultados do segundo turno do STE com postgres (+postgis) e openlayers
Ah! E sobre o que eu usei no backend, alem de postgres e fly.io, o backend eh eh Java, usando um framework chamado quarkus e jdbi pra fazer a interface com o banco.
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Is JDBC becoming a “legacy” API??
More personally, I'm not much an ORM guy. I've just never found that the benefits outweigh the costs, but that's just my opinion. That said, I don't use JDBC directly in my own projects anymore, strongly preferring to use JDBI instead. I find that it walks the line between "make using the database easier" and "get between you and the database" beautifully. But there's not a darn thing wrong with using JDBC directly.
javalin.github.io
- Java EE or Python Django?
- Javalin – a simple web framework for Java and Kotlin
- Spark – A web micro framework for Java and Kotlin
- Javalin: A simple web framework for Java and Kotlin
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Show HN: Zero-dependency Java framework out of beta
The size statistics page is super cool: https://github.com/byronka/minum/blob/master/docs/size_compa...
Reasoning this way about software and dependencies more often seems like a good thing, just so we're aware of what we're actually getting into, especially with projects that use npm.
I actually hadn't heard of Javalin before, which also seems nice: https://javalin.io/
Aside from that, I've also had good experiences with Dropwizard - which is way simpler than Spring Boot but at the same time uses a bunch of idiomatic packages (like Jetty, Jersey, Jackson, Logback and so on): https://www.dropwizard.io/en/stable/
I do wonder whether Minum would ever end up on the TechEmpower benchmarks and how it'd stack up against the other libraries/frameworks there, those benchmarks are pretty interesting.
- Java 21 Released
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Helidon Níma is the first Java microservices framework based on virtual threads
Counter-example: https://javalin.io/ uses Servlets, and seems to be doing quite fine without annotations.
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Full Time
Yes, and it was not that well designed to be honest... the successor is quite a lot nicer and it's called Javalin[1].
Same philosophy but just got things right where Spark, being the "first" (in the Java world, using the design inherited by Sinatra[2]) had a few design issues.
[1] https://javalin.io/
[2] https://sinatrarb.com/
- Show HN: Java REST without annotations, DI nor reactive streams
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Is it just me, or does the Spring Framework lead to hard-to-maintain code and confusion with annotations?
I strongly advocate frameworks like https://javalin.io/ and Jooq (https://www.jooq.org/) if you are going to start a new project in Java.
What are some alternatives?
jOOQ - jOOQ is the best way to write SQL in Java
ktfmt - A program that reformats Kotlin source code to comply with the common community standard for Kotlin code conventions.
Spring Data JPA - Simplifies the development of creating a JPA-based data access layer.
Vert.x - Vert.x is a tool-kit for building reactive applications on the JVM
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
minum - A minimalist Java web framework built from scratch
sql2o - sql2o is a small library, which makes it easy to convert the result of your sql-statements into objects. No resultset hacking required. Kind of like an orm, but without the sql-generation capabilities. Supports named parameters.
Jetty - Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Querydsl - Unified Queries for Java
jbang - Unleash the power of Java - JBang Lets Students, Educators and Professional Developers create, edit and run self-contained source-only Java programs with unprecedented ease.
Flyway - Flyway by Redgate • Database Migrations Made Easy.
undertow-examples