javalin | A simple and modern Java and Kotlin web framework | HTTP library

by tipsy Kotlin Version: 4.6.8 License: Apache-2.0

X-Ray Key Features Code Snippets(1)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | javalin Summary

javalin is a Kotlin library typically used in Networking, HTTP, Spring Boot, Spring, Framework applications. javalin has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

A simple and modern Java and Kotlin web framework

Support

Quality

Security

License

Reuse

Support

javalin has a medium active ecosystem.

It has 5430 star(s) with 465 fork(s). There are 110 watchers for this library.

It had no major release in the last 12 months.

There are 28 open issues and 894 have been closed. On average issues are closed in 44 days. There are 3 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of javalin is 4.6.8

Quality

javalin has 0 bugs and 0 code smells.

Security

javalin has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

javalin code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

javalin is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

javalin releases are not available. You will need to build from source code and install.

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javalin Key Features

No Key Features are available at this moment for javalin.

javalin Examples and Code Snippets

How to make the client receive server sent event using Javalin?

Java

Lines of Code : 29

License : Strong Copyleft (CC BY-SA 4.0)

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public static void main(String[] args) throws InterruptedException {

        Queue clients = new ConcurrentLinkedQueue<>();

        Javalin app = Javal

Community Discussions

Trending Discussions on javalin

Disabling Options method in Javalin 3.0

JAR not able to encode languages properly

Javalin Migration

Javalin Migration from 3 to 4

React-Router & useContext, infinite Redirect or Rerender

Error org.jpl7.JPLException: unsupported blob type passed from Prolog

Hibernate with PostgreSQL on Heroku error creating table

JSON response from string in Javalin

Javalin hot reload of static files

Jetty Async not working as anticipated, experiencing worse performance than sync

QUESTION

Disabling Options method in Javalin 3.0

Asked 2022-Jan-20 at 22:30

We are using Javalin in our kotlin application and we want to disable the options method from the handlers, We want to keep only get,post methods. below is the config code of Javalin

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ANSWER

Answered 2022-Jan-20 at 22:30

Consider adding an explicit handler for this method with default 405 response:

Source https://stackoverflow.com/questions/70791382

QUESTION

JAR not able to encode languages properly

Asked 2022-Jan-11 at 14:08

I'm building a web app with Javalin. Everything is working fine until I started running the JAR directly from command prompt. I noticed all the emojis, international languages and custom font are appearing as "??????" in my JSON response. So I started testing with a simple string in my main method & tried to print it out in console and this is the results I'm getting:

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ANSWER

Answered 2022-Jan-11 at 14:08

It turns out the way I was creating the fatJar was causing this problem. I changed it to using shadowJar plugin and now everything is working normally except the text with custom font are getting formatted to normal text. This is fine in my case.

Source https://stackoverflow.com/questions/70618561

QUESTION

Javalin Migration

Asked 2021-Dec-28 at 22:21

I am new to Kotlin and Javalin. While migrating from Javalin 3 to 4, Javalinjackson.configure() function is deprecated. Below is the part of the code

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ANSWER

Answered 2021-Dec-28 at 22:21

JavalinJackson is not a singleton any more. To "configure" it just pass your ObjectMapper as a constructor parameter:

Source https://stackoverflow.com/questions/70510036

QUESTION

Javalin Migration from 3 to 4

Asked 2021-Dec-28 at 16:39

We are migrating the Javalin from 3 to 4 in our current kotlin project. the dynamicGzip has been deprecated and replaced with compression strategy. The pom.xml part will look like below.

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ANSWER

Answered 2021-Dec-28 at 16:39

Compression

The compressionStrategy method of the JavalinConfig class takes two parameters:

Source https://stackoverflow.com/questions/70502879

QUESTION

React-Router & useContext, infinite Redirect or Rerender

Asked 2021-Aug-22 at 09:50

I have a web application that I've been developing for a little over a year and some change. The frontend is react w/ react-router-dom 5.2 to handle navigation, a service worker, to handle caching, installing, and webpush notifications, and then the backend is a Javalin application, which exists on top of Jetty.

I am using the context API to store some session details. When you navigate to my application, if you are not already logged in, then you won't have your information stored in that context yet, so you will be redirected to /login which will begin that process. The LoginLogout component simply redirects to an external authserver that handles the authentication workflow before redirecting back to another endpoint.

Here's the detail:

There are no redirects to /login in the server code and the ProtectedRoute code is definitely to blame for this issue. Navigating to /login is causing either an infinite redirect or an infinite rerender.
All redirects server side are performed with code 302 temporary. And again, none of them point to /login
The issue, as I have tracked it down, I believe has something to do with the context itself. I have made modifications to the context and now I am experiencing different behavior from before, when I believed the service worker to be the culprit. The issue is still an infinite redirect or rerender and is hard to troubleshoot.
I know the server is doing it's part and the /auth/check endpoint is providing exactly what it should at all times.

Here's my ProtectedRoute code

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ANSWER

Answered 2021-Aug-11 at 14:05

I am hesitant to call this resolved. And will not accept this answer until I am sure. But the issue appears to have been, that I had no default render path in my ProtectedRoute. I've updated the ProtectedRoute code to include:

Source https://stackoverflow.com/questions/68686430

QUESTION

Error org.jpl7.JPLException: unsupported blob type passed from Prolog

Asked 2021-Jul-31 at 23:15

Im using java 1.8 with javalin, I'm trying to execute a query stored in prolog-app.pl this is the project tree there's a main.java inside the folder

I'm running everything on the main as a static test with the following line of code:

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ANSWER

Answered 2021-Jul-31 at 23:15

Instead of using the jpl from gradle, download the jpl.jar, and use it locally.

Check this thread to learn how to use local libraries with gradle How to add local .jar file dependency to build.gradle file?

Source https://stackoverflow.com/questions/68596288

QUESTION

Hibernate with PostgreSQL on Heroku error creating table

Asked 2021-Jun-24 at 19:40

I'm getting this error when building a Javalin app that uses Hibernate with PostgreSQL. All the other tables are being created normally but this one gives me this error and I can't figure out why. I have seen this error but it happens when using the "user" as a table name may be sale is a postgre reserved name for an internal table.

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ANSWER

Answered 2021-Jun-24 at 19:40

user column is a reserved word in postgres. Try to change it to something else.

Example:

Source https://stackoverflow.com/questions/68121034

QUESTION

JSON response from string in Javalin

Asked 2021-Mar-20 at 20:03

I am trying to create the response in JSON format from a string in Javalin. JSON object must be from a string, not from class.

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ANSWER

Answered 2021-Mar-20 at 20:03

If you are using Gson, then switch to using Jackson, when using Javalin methods such as ctx.json().

If you used Maven to import Javalin, and if you used the javalin-bundle, then you will already have Jackson, for example:

Source https://stackoverflow.com/questions/66725573

QUESTION

Javalin hot reload of static files

Asked 2021-Feb-25 at 00:42

I configured a staitc folder to be served by Javalin:

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ANSWER

Answered 2021-Feb-25 at 00:42

You can use an external location (i.e not a "classpath" location) for your static files:

Source https://stackoverflow.com/questions/66360750

QUESTION

Jetty Async not working as anticipated, experiencing worse performance than sync

Asked 2020-Dec-09 at 14:20

Thanks in advance for any pointers or help.

Basically I was expecting the async version of this to perform far better than the sync version, but instead the sync version performs equivalent or somehow better.

Am I doing something wrong, what gives? I tried without Javalin in case something in the framework was creating a problem, seemed to give similar results. I did try this with just Netty (too long to post the code) and I experienced similar results also.

I wrote the following code: (javalin-3.12.0 and jetty-9.4.31.v20200723)

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ANSWER

Answered 2020-Dec-09 at 13:59

Since Jetty 9+ is 100% async from the get go, this lack of difference makes sense. (In fact, in Jetty 9+ there is extra work done to pretend to be synchronous when using synchronous APIs like InputStream.read() or OutputStream.write())

Also, your load testing workloads are not realistic.

You want many more client machines to do the testing with. There is no single software client alone is capable of stressing a Jetty server. You'll hit system resource limits well before you hit any kind of Jetty serving limits.
- At least a 4 to 1 ratio (we test with a 8 to 1 ratio) of client machines to server machines to generating enough load to stress Jetty.
You want many concurrent connections to the server. (think 40,000+)
- Or you want HTTP/2 in the picture (which also stresses out the server resources in it's own unique ways)
You want lots of data returned (something that would take multiple network buffers to return).
You want to sprinkle in a few client connections that are slow to read as well (which on a synchronous server can impact the rest of the connections that are not slow by simply consuming too many resources)

Source https://stackoverflow.com/questions/65218068

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install javalin

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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