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Questions tagged [go]

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Go, also called golang, is an open source programming language initially developed at Google. It is a statically-typed language with syntax loosely derived from that of C, adding automatic memory management, type safety, some dynamic-typing capabilities, additional built-in types such as variable-length arrays and key-value maps, and a large standard library.

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I'm trying to get hands-on experience with Uncle Bob's Clean Architecture in Go, but I'm running into some issues. Also, I'm not yet familiar with all of Go's idioms. For testing purposes, I'm ...
Crite's user avatar
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I just learned about the Functional Options pattern in golang. what are the benefits of using it over just allowing to pass a config struct and just overriding the default values provided in the ...
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The title Go, Error Handling, and Big Text Files is a blog post from Wesley Aptekar-Cassels from 2021. In this blog post he reports about a problem he faced parsing long text files. He tried scanner :=...
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I have an endpoint similar to GET ../produtcs/123 where 123 stands for an ID. The REST service response with either status 200 and a json object A {"deliveryData": {"status": 200, ...
surfmuggle's user avatar
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As far as I understand (not much), the archival .a file is just, roughly speaking, the collection/batch of object .o files. It's like a library of compiled code that can be cached and which can be ...
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I've been at my current job for about 4-5 months, mainly working with Go, and I have no prior experience with Kafka. Before this, my background was in JavaScript, Node.js, React, etc. I recently got a ...
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I have a process in golang that I want to kickoff through a RPC call but then have the function return early whilst the process continues in the background. Specifically it’s just a basic db transfer ...
Person1's user avatar
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I have few questions on the go's answer to c10K problem. How is an event loop different from the network poller described in this blog? I see a striking similarity between waiting threads and waiting ...
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Had a discussion today in how to implement services that work with messages coming in from event queues. We call these services processors. One of us argues for using several functions, while the ...
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I'm relatively new to Go but I come from a C#/OOP background where unit testing private methods isn't something that's generally done. I currently have a senior developer telling me it's "bad ...
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I am working on a Go application where two concurrent maps, products and productCatalog, are accessed by numerous threads in live traffic to retrieve data at high throughput. These maps are populated ...
dragons's user avatar
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I'm very new in DDD and I was following one of the videos of GohperCon to structure of my Golang App using DDD with Hexagonal Architecture. At the lowest (deepest) layer is the storage that can be ...
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What would the appropriate design pattern to avoid deadlock when several functions use the same mutex ? It is quite easy to forget what method uses the lock and so it happens that you call a function ...
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I've created a backend following a microservices architecture and now I need to implement logging. my understanding After reading some articles about this topic, I've listed below some "pretty ...
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I have read this article which indicates a double tuple structure, but it is unfortunately light on implementation details, which is what I am looking for. So... how are interfaces implemented in Go? ...
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I have one microservice (in GO) that needs to read a whole table every hour, filter out some data and send it to another application. So as an example, imagine I have the following model: type User ...
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I have a little bit of experience with Go, that I have been trying to use as a reference point to wrap my mind around Rust via a cards game I wrote in Go that I would like to now write in Rust. I know ...
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I try to have as many pure functions as possible, but if I can't, I at least try to make the side effects as explicit as possible. Here is an example (in Go) type State struct { count int } func (...
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I’m trying to test concurrently request (brute force test), with 1000 request/sec (same request id). I’m using Rest API. The service running on distributed system, I’m using 3 pods. The problem is I ...
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I followed the guide here https://quarkus.io/guides/building-native-image to set up a minimal quarkus webservice graalvm native image. Ran command 'time quarkus build --native' to compile the example. ...
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I previously asked this on StackOverflow, but doesn't fit there and I was suggested to move it here. I was thinking about using two seperate backend languages for seperating concerns in a project of ...
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We want to create an API to communicate witha device we currently sell. The API should be available for several platforms like C / C++ / .NET / Python and available for Windows and Linux. The idea is ...
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In trying to separate interface from implementation, I ran into a circular dependency problem. There is a best practice in the world of Java: consume interfaces instead of concrete classes. That is, ...
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I've recently been learning go and the versioning system seems rather odd to me. Most languages / dependency management systems that I'm familiar with (like rust and cargo) have an explicit way to ...
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I have a utility function called connectToMongoDB() which connects to MongoDB. Basically, it creates a client for MongoDB and returns that. I'm making a library and I'm thinking of unit testing the ...
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I was reading about composition over inheritance and came across a question about solving the Circle-Ellipse Problem in Object-Oriented Programming. This kind of problem is often used as an example of ...
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I need some help with my authentication design. Happy to share any code as needed... Overview I have implemented the Google Sign-in (new web implementation here) button in my client web application. ...
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In my company, we are using Event Sourcing pattern to implement a storage for all changes to the price of a booking. Across the company, different services might try to append events to a booking ...
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I have a class (as a protobuf) OrderChange, that represents when an order (imagine Amazon.com) changes: message OrderChange { Order old_order = 1; Order new_order = 2; } message Order { ...
onepiece's user avatar
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I need to consume several APIs concurrently. In order to do that I decided to containerize each API client code and manage them using Kubernetes. Some of those APIs need to be "walked". They ...
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I have moderate Golang experience and lots of experience in other programming languages such as Java, Python, Rust, Scala, and others. I'm comfortable with building REST services and most of the other ...
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I'm working on a project which focuses on simple HTTP-related actions (to get my feet wet really). I'm using the net/http package, which I thought was very convenient for almost all requirements ...
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We have set of common types (mostly structs, scalars, string IDs) that are used across different packages in a project written in Golang. Currently we define them in a package named "models" ...
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I'm asking myself above question since I implemented an API that accesses a third-party API and currently write tests to increase my code coverage in the class that communicates with the third-party ...
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In Programming Distributed Computing Systems: 7.3.4 Distribution Distributed computing is inherently concurrent. However, distribution aspects go far beyond concurrency. Of particular importance from ...
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New to golang and is now researching on how to do test in golang. I see that there are popular mocking library like gomock. However, at the same time, I see that large golang open source projects don'...
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Java has "checked exceptions", which force the caller of the method to either handle an exception or to rethrow it, e.g. // requires ParseException to be handled or rethrown int i = ...
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1 answer
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I have a Single Page Application that uses React-Router and is served via Go backend. The pre-built static app is accessible at app.com which then uses app.com/api to load dynamic data. If a user goes ...
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A project is structured as so: A build server listens to changes in two repositories: a frontend and backend repo. When it picks up a change it builds, tests, and deploys the updates to a production ...
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I'm designing a monolith RESTful API that potentially sometime in the future may turn into microservices. I'm also trying following Uncle Bob's clean code as well. My question lies in structuring the ...
Gabe's user avatar
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With a single publisher(go-routine) and multiple subscribers(go-routine) on same machine, below message hub help create pubsub model: type PublisherHub struct { subscribers map[*subscribmediator....
overexchange's user avatar
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63 votes
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I've got some process in Go. Here's an example counting lines in text, though the question is meant to be far more general than this particular example: func lineCount(s string) int { count := 0 ...
TheEnvironmentalist's user avatar
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I have a microservice architecture running on Heroku. I am having some problems handling race conditions. The problem is, that service A: Needs to fetch the user's balance through an API call to ...
Harald Nordgren's user avatar
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I use the "channel pipeline" pattern quite a lot in Go, which looks something like this: // getSomeNums spits out ints onto a channel. Temperatures, pressures, doesn't matter func ...
Tal's user avatar
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I am currently writing a quiz web-app with a React front-end and a Golang backend, with a PostgreSQL database to keep track of the quizzes, the questions on the quizzes, and the choices in the ...
Eddie Hatfield's user avatar
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Within our codebase we have integration tests like these: func TestActivateSuspendedFoo() { // setup all dependencies baz := jsonToStruct( "baz": { "a": ...
Filipe Gorges Reuwsaat's user avatar
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Solution as it is right now I have this solution where I gather information from a proprietary product of a different company in various sites. The solution is based on a single go binary that ...
Marged's user avatar
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I'm trying to learn about MODBUS as a free-time project. It is a long standing desire to write my own driver in Golang. That being said, I'm now trying to design the concurrency model for device ...
Tim's user avatar
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I'm working on a project that uses PubSub(GCP), my question is not specific to GCP, it's more regarding to the architectural pattern(I'm used to statically typed languages, and I have a hard time ...
alex's user avatar
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In order to build a messaging app, I have followed this example : https://github.com/gorilla/websocket/tree/master/examples/chat This consists of a Hub, running in a single goroutine in the program, ...
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