microhttp
Flyway
microhttp | Flyway | |
---|---|---|
7 | 81 | |
515 | 7,786 | |
- | 0.7% | |
6.1 | 7.2 | |
5 months ago | 8 days ago | |
Java | Java | |
MIT License | Apache License 2.0 |
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microhttp
- FLaNK Stack Weekly 11 Dec 2023
- Any suggestions for good open source Java codebases to study(With below criteria)?
- Latest version of Microhttp, an event-driven, zero-dependency, pure-Java web server with 500 LOC, capable of 1,000,000+ requests per second on commodity EC2 hardware.
- Microhttp: Event-driven, zero-dependency web svr, 500 LOC, capable of 100k r/SEC
- Microhttp is an event-driven, single-threaded, zero-dependency web server with 500 LOC. Benchmarks on EC2 show 100,000+ requests per second and 50,000+ persistent connections.
Flyway
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Let's write a simple microservice in Clojure
The session logs show that the application loads configurations and establishes a connection with a PostgreSQL database. This involves initializing a HikariCP connection pool and Flyway for database migrations. The logs confirm that the database schema validation and migration checks were successful. The startup of the Jetty HTTP server follows, and the server becomes operational and ready to accept requests on the specified port.
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Ask HN: What tool(s) do you use to code review and deploy SQL scripts?
Also RedGate, but Flyway has some reasons to recommend it over RedGate Deploy depending on your DBAs/workflows: https://flywaydb.org/
(Though I don't think it is "complete" or "perfect", either.)
EF Migrations are in a really good place now if you like/don't mind C# as a language (and you can easily embed SQL inside the C#, too, but there are benefits to being able to also run high level C# code). With today's tooling you can package your migration "runner application" as a single deployable executable for most platforms. You can build the executable once and run it in all your environments. (The same tool that updates your QA and Staging updates your Prod, testably running the same migrations.) Given the single executable deployable I might even consider using it for projects not themselves written in C#.
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PostgreSQL Is Enough
There is a bit of tooling needed but is already around. For Java for example I had very good experience with a combination of flyway [1] for migrations, testcontainers [2] for making integration tests as easy as unit tests and querydsl [3] for a query and mapping layer.
[1] https://github.com/flyway/flyway
[2] https://java.testcontainers.org/modules/databases/postgres/
[3] https://github.com/querydsl/querydsl
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Using Flyway to version your database
When software starts using a database, it's advisable to have version control, just as we have Github to control our source code. This is all to be sure about what was executed for that specific version. For Java and Spring boot, we have the Flyway framework that aims to resolve this situation, free of charge.
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CI/CD for Databricks
If you're looking for tools, like https://www.liquibase.com/ or https://flywaydb.org/, which are database-state-based schema migration toolkits - it might be relatively straightforward to build similar ones using Databricks SQL drivers.
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Working with jOOQ and Flyway using Testcontainers
Honestly I kind of wish there was a Lukas Eder database migration library. Call it whatever jooq-migration. At least I would have more insight of what is going on (<-- seriously look at the commit history).
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Strategy to run database scripts on Kubernetes
This is a 4th option, which should play nice with ArgoCD. The following example runs flyway as a k8s job. The desired migration changes are recorded as files within the chart. This helm chart can be integrated with your application (Using hooks to determine when the migration job is run) or run manually.
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How do your teams run DB migrations?
By using an opinionated framework within the app/service (like Flyway, Migrate, Diesel, etc). Schema migrations happen on app/service start-up.
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I've never created a production database from scratch and am wondering how much trouble it would be to transition a one-to-one relationship to a one-to-many relationship if I determine at some point that the latter is required.
Depending on the language or platform there are libraries you can use to manage this, such as Prisma on node and Flyway for Java/JVM.
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How should I document and/or automate schema changes?
It's probably overkill but I've used github plus flyway at a couple places in the past which is pretty nice tool for tracking changes to a variety of db's, it's also very helpful if you ever need to replicate a db in a new region/environment.
What are some alternatives?
ring - Clojure HTTP server abstraction
alembic - A database migrations tool for SQLAlchemy.
just - the only javascript runtime to hit no.1 on techempower :fire:
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
Guava - Google core libraries for Java
roundhouse - RoundhousE is a Database Migration Utility for .NET using sql files and versioning based on source control
jsoup - jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
H2 - H2 is an embeddable RDBMS written in Java.
deezpatch - A simple fast dispatch library.
dbmate - :rocket: A lightweight, framework-agnostic database migration tool.
MFL - A Java library for reading and writing MATLAB's MAT File format
Hibernate - Hibernate's core Object/Relational Mapping functionality