aws-sdk-java-v2
H2
aws-sdk-java-v2 | H2 | |
---|---|---|
8 | 11 | |
2,076 | 4,053 | |
1.1% | 0.6% | |
9.8 | 9.1 | |
3 days ago | 14 days ago | |
Java | Java | |
Apache License 2.0 | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
aws-sdk-java-v2
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AWS SnapStart - Part 15 Measuring cold and warm starts with Java 21 using different synchronous HTTP clients
In this article we'll now add another dimension to our measurements : the choice of HTTP Client implementation. This is also interesting, because starting from AWS SDK for Java version 2.22 AWS added support for their own implementation of the synchronous CRT HTTP Client. The asynchronous CRT HTTP client has been generally available since February 2023. In this article we'll explore synchronous HTTP clients first and leave asynchronous ones for the next article.
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Creating RSS feeds for language/module specific AWS SDK updates
The updates could be parsed from the github repo's CHANGELOG files (ex: javascript, java, python). I'm picturing an RSS feed generated for a specific language and module (ex: python s3, javascript s3, java sqs)
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Using Cognito to provide auth to a Java desktop application - advice requested
Meanwhile the [SDK doesn't provide samples or an API for USER_SRP_AUTH AuthFlow](https://github.com/aws/aws-sdk-java-v2/issues/2851). (I don't think that's the right choice, anyway, because if I'm right I'd have to register my user in my new app, and I don't want to do that).
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Latest java vs Kotlin?
Bonus: AWS SDK for Java v2 - this one I'm not sure of their reasons, but this request to add nullability annotations was filed 4.5 years ago, and there has been virtually no movement or feedback on it, so I can only speculate about their reasons for not fixing this.
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Need help with the weird behavior of the AWS pagination token
If you think its a genuine bug in the API or the client somehow I think opening an issue in the github repo for the sdk might be a good place to start https://github.com/aws/aws-sdk-java-v2/issues .
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Improving Python S3 Client Performance with Rust
Should be possible to just issue a GetObject with a range for the initial request skipping a head request. See here for caveats about how the Content Range data is returned in the response header: https://github.com/aws/aws-sdk-java-v2/issues/1209
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How is the market for Kotlin developers where you live?
V2 AWS SDK for Dynamo DB, SNS, and SQS
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enhanced DynamoDB: Does the dynamodb mapper support different types of rows on the same table?
DynamoDB mapper AWS SDK v2 readme
H2
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H2 Database – CVE getting flagged by automated scans
The URL should point to a particular comment, but HN removes fragments: https://github.com/h2database/h2database/issues/3686#issueco...
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“Our paying customers need X, when will you fix it?”
This sounds very much like the idiocy of "infosec" lunkheads who know nothing about what they're "fixing" but if an automated system tells them a CVE exists, they've absolutely got to have it "patched". They don't look into what the claims of the CVE are, or whether their specific use case is vulnerable. They don't know, they don't care, they're not even programmers. All they know is a box needs ticking.
A similar thing happened with h2database - a "security researcher" found that if you do something you're told not to do, then bad things happen.. but they demanded and got a CVE allocated anyway. Anyone who looks at it realises it's bullshit, but the mere existence of a CVE is all that matters to these idiots.
What the h2database developer said about it: https://github.com/h2database/h2database/issues/3686#issueco...
> I struggle to understand why I should feel the slightest shred of sympathy for "major corporations" that are using a volunteer-developed open-source project. Feel free to get your corporation to pay someone to deal with this, or pay for a similar commercial library.
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SQLite Internals: How the Most Used Database Works
> ...than it would be to learn the exact syntax and quirks and possibly bugs of someone else's implementation...
Yup. Also, having deep knowledge of the language is required.
SQLite's grammar is neat. Creating a compatible parser would make a fun project. Here's a pretty good example: https://github.com/bkiers/sqlite-parser (Actual ANTLR 4 grammar: https://github.com/bkiers/sqlite-parser/blob/master/src/main... )
Postgres, which tries to be compliant with the latest standards, however...
SQL-2016 is a beast. Not to mention all the dialects.
I'm updating my personal (soon to be FOSS) grammar from ANTLR 3 LL(k) to ANTLR 4 ALL().
I've long had a working knowledge of SQL-92, with some SQL-1999 (eg common table expressions).
But the new structures and extensions are a bit overwhelming.
Fortunately, ANTLR project has ~dozen FOSS grammars to learn from. https://github.com/antlr/grammars-v4/tree/master/sql
They mostly mechanically translate BNFs to LL(k) with some ALL(). Meaning few take advantage of left-recursion. https://github.com/antlr/antlr4/blob/master/doc/left-recursi...
Honestly, I struggled to understand these grammars. Plus, not being conversant with the SQL-2016 was a huge impediment. Just finding a succinct corbis of test cases was a huge hurdle for me.
Fortunately, the H2 Database project is a great resource. https://github.com/h2database/h2database/tree/master/h2/src/...
Now for the exciting conclusion...
My ANTLR grammar which passes all of H2's tests looks nothing like any of the official or product specific BNFs.
Further, I found discrepancy between the product specific BNFs and their implementations.
So a lot of trial & error is required for a "real world" parser. Which would explain why the professional SQL parsing tools charge money.
I still think creating a parser for SQLite is a great project.
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Database of Databases
H2 - Free, Embedded & Open source
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🎀 Spring Boot 2.7.0 Released
H2 2.1
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How is the market for Kotlin developers where you live?
H2 for mocking relational database connections
- Ask HN: Who wants to be hired? (December 2021)
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Best Database option for a Swing application
It's open-source and written in Java, so you can even create custom procedures and register them straight in your application!
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Reliable WebSockets-based pub/sub with Spring Boot
Firstly, let's set up a basic Spring Boot application. We can use the Spring Initializr with Spring Data JPA, H2 Database, Lombok added. H2 Database will provide us with a simple database, and Spring Data JPA will allow us to easily interact with it using Hibernate. Lombok will make it easier to write concise and readable classes.
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Why are tar.xz files 15x smaller when using Python's tar compared to macOS tar?
Sorting chunks by similarity: commonly used tools don't do that. Most archive tools only sort by file type.
I wrote a tool that chunks the data (into variable-sized blocks, to re-sync if there are multiple files that have different length prefixes, but that's another story), and then sorts the chunks by LSH (locality sensitive hash). LSH is used by search engines to detect similar text. It can compress directories that contain multiple version of e.g. source code very well (e.g. trunk, branches). https://github.com/h2database/h2database/blob/master/h2/src/...
I discussed this approach with a researcher in this area in January 2020. AFAIK there is active research in this area, specially to compress DNA sequences. But he also wasn't aware of papers or research in this area for general-purpose data compression.
So, I think this area is largely uncharted. I would be interested (as a hobby side project) to help, if somebody is interested.
What are some alternatives?
aws-sdk-java - The official AWS SDK for Java 1.x. The AWS SDK for Java 2.x is available here: https://github.com/aws/aws-sdk-java-v2/
MapDB - MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
Simple Java Mail - Simple API, Complex Emails (Jakarta Mail smtp wrapper)
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
powertools-lambda-java - Powertools is a developer toolkit to implement Serverless best practices and increase developer velocity.
MariaDB4j - MariaDB Embedded in Java JAR
mock-aws-java-sdk - Provides mocked versions of the Java AWS SDK clients
Flyway - Flyway by Redgate • Database Migrations Made Easy.
RR4J - RR4J is a tool that records java execution and later allows developers to replay locally.
JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
FAANG - Competitive programming questions.
Chronicle Map - Replicate your Key Value Store across your network, with consistency, persistance and performance.