flux | Flux is a lightweight scripting language for querying databases (like InfluxDB) and working with dat | Emulator library

 by   influxdata Go Version: v0.193.0 License: MIT

kandi X-RAY | flux Summary

kandi X-RAY | flux Summary

flux is a Go library typically used in Utilities, Emulator, Spring Boot, Docker, Raspberry Pi applications. flux has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Flux is a lightweight scripting language for querying databases (like InfluxDB) and working with data. It is part of InfluxDB 1.7 and 2.0, but can be run independently of those. This repository contains the language definition and an implementation of the language core.
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              flux has a low active ecosystem.
              It has 701 star(s) with 139 fork(s). There are 58 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 911 open issues and 1550 have been closed. On average issues are closed in 178 days. There are 36 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of flux is v0.193.0

            kandi-Quality Quality

              flux has 0 bugs and 0 code smells.

            kandi-Security Security

              flux has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              flux code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              flux is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              flux releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 419755 lines of code, 9087 functions and 944 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of flux
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            flux Key Features

            No Key Features are available at this moment for flux.

            flux Examples and Code Snippets

            Build a Flux .
            javadot img1Lines of Code : 9dot img1License : Permissive (MIT License)
            copy iconCopy
            public Flux handle() {
                    return Flux.just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
                        .handle((i, sink) -> {
                            String animal = "Elephant nr " + i;
                            if (i % 2 == 0) {
                                sink.next(animal);
                      
            Generate a stateful generator that can be used in a Flux .
            javadot img2Lines of Code : 8dot img2License : Permissive (MIT License)
            copy iconCopy
            public Flux statefulImutableGenerate() {
                    return Flux.generate(() -> 1, (state, sink) -> {
                        sink.next("2 + " + state + " = " + (2 + state));
                        if (state == 101)
                            sink.complete();
                        return sta  
            Creates a Flux
            javadot img3Lines of Code : 6dot img3License : Permissive (MIT License)
            copy iconCopy
            public Flux create() {
                    Flux articlesFlux = Flux.create((sink) -> {
                        ItemProducerCreate.this.listener = (items) -> {
                            items.stream()
                                .forEach(article -> sink.next(article));
                        }  

            Community Discussions

            QUESTION

            Springboot 2.6.0 / Spring fox 3 - Failed to start bean 'documentationPluginsBootstrapper'
            Asked 2022-Mar-25 at 06:14

            I'm trying to initiate a Springboot project using Open Jdk 15, Springboot 2.6.0, Springfox 3. We are working on a project that replaced Netty as the webserver and used Jetty instead because we do not need a non-blocking environment.

            In the code we depend primarily on Reactor API (Flux, Mono), so we can not remove org.springframework.boot:spring-boot-starter-webflux dependencies.

            I replicated the problem that we have in a new project.: https://github.com/jvacaq/spring-fox.

            I figured out that these lines in our build.gradle file are the origin of the problem.

            ...

            ANSWER

            Answered 2022-Feb-08 at 12:36

            This problem's caused by a bug in Springfox. It's making an assumption about how Spring MVC is set up that doesn't always hold true. Specifically, it's assuming that MVC's path matching will use the Ant-based path matcher and not the PathPattern-based matcher. PathPattern-based matching has been an option for some time now and is the default as of Spring Boot 2.6.

            As described in Spring Boot 2.6's release notes, you can restore the configuration that Springfox assumes will be used by setting spring.mvc.pathmatch.matching-strategy to ant-path-matcher in your application.properties file. Note that this will only work if you are not using Spring Boot's Actuator. The Actuator always uses PathPattern-based parsing, irrespective of the configured matching-strategy. A change to Springfox will be required if you want to use it with the Actuator in Spring Boot 2.6 and later.

            Source https://stackoverflow.com/questions/70036953

            QUESTION

            Subscribe to flux from inside subscribe in Spring webFlux java
            Asked 2022-Mar-17 at 07:56

            I have written a logic using spring reactor library to get all operators and then all devices for each operator (paginated) in async mode.

            Created a flux to get all operator and then subscribing to it.

            ...

            ANSWER

            Answered 2022-Mar-16 at 11:34

            I broke it down to two flows 1st getting all operators and then getting all devices for each operator.

            For pagination I'm using Flux.expand to extract all pages.

            Source https://stackoverflow.com/questions/71465522

            QUESTION

            Manage access to shared resource with Project Reactor
            Asked 2022-Feb-23 at 10:26

            How to manage access to shared resources using Project Reactor?

            Given an imaginary critical component that can execute only operation at the time (file store, expensive remote service, etc), how could one orchestrate in reactive manner access to this component if there are multiple points of access to this component (multiple API methods, subscribers...)? If the resource is free to execute the operation it should execute it right away, if some other operation is already in progress, add my operation to the queue and complete my Mono once my operation is completed.

            My idea is to add tasks to the flux queue which executes tasks one by one and return a Mono which will be complete once the task in the queue is completed, without blocking.

            ...

            ANSWER

            Answered 2022-Feb-23 at 10:26

            this looks like a simplified version of what the reactor-pool does, in essence. have you considered using that with eg. a maximum size of 1?

            https://github.com/reactor/reactor-pool/

            https://projectreactor.io/docs/pool/0.2.7/api/reactor/pool/Pool.html

            The pool is probably overkill, because it has the overhead of having to deal with multiple resources on top of multiple competing borrowers like in your case, but maybe it could provide some inspiration for you to go further.

            Source https://stackoverflow.com/questions/70529490

            QUESTION

            How to limit concurrent http requests with Mono & Flux
            Asked 2022-Feb-08 at 01:37

            I want to handle Flux to limit concurrent HTTP requests made by List of Mono.

            When some requests are done (received responses), then service requests another until the total count of waiting requests is 15.

            A single request returns a list and triggers another request depending on the result.

            At this point, I want to send requests with limited concurrency. Because consumer side, too many HTTP requests make an opposite server in trouble.

            I used flatMapMany like below.

            ...

            ANSWER

            Answered 2021-Aug-20 at 04:29

            I am afraid Project Reactor doesn't provide any implementation of either rate or time limit.

            However, you can find a bunch of 3rd party libraries that provide such functionality and are compatible with Project Reactor. As far as I know, resilience4-reactor supports that and is also compatible with Spring and Spring Boot frameworks.

            The RateLimiterOperator checks if a downstream subscriber/observer can acquire a permission to subscribe to an upstream Publisher. If the rate limit would be exceeded, the RateLimiterOperator could either delay requesting data from the upstream or it can emit a RequestNotPermitted error to the downstream subscriber.

            Source https://stackoverflow.com/questions/68856529

            QUESTION

            Flux.jl : Customizing optimizer
            Asked 2022-Jan-25 at 07:58

            I'm trying to implement a gradient-free optimizer function to train convolutional neural networks with Julia using Flux.jl. The reference paper is this: https://arxiv.org/abs/2005.05955. This paper proposes RSO, a gradient-free optimization algorithm updates single weight at a time on a sampling bases. The pseudocode of this algorithm is depicted in the picture below.

            optimizer_pseudocode

            I'm using MNIST dataset.

            ...

            ANSWER

            Answered 2022-Jan-14 at 23:47

            Based on the paper you shared, it looks like you need to change the weight arrays per each output neuron per each layer. Unfortunately, this means that the implementation of your optimization routine is going to depend on the layer type, since an "output neuron" for a convolution layer is quite different than a fully-connected layer. In other words, just looping over Flux.params(model) is not going to be sufficient, since this is just a set of all the weight arrays in the model and each weight array is treated differently depending on which layer it comes from.

            Fortunately, Julia's multiple dispatch does make this easier to write if you use separate functions instead of a giant loop. I'll summarize the algorithm using the pseudo-code below:

            Source https://stackoverflow.com/questions/70641453

            QUESTION

            Expo SDK 44 upgrade ERROR - App.js: [BABEL]: Unexpected token '.'
            Asked 2022-Jan-24 at 21:48

            I have recently upgraded my app from SDK 40 to SDK 44 and came across this error App.js: [BABEL]: Unexpected token '.' (While processing: /Users/user/path/to/project/node_modules/babel-preset-expo/index.js)

            Error Stack Trace:

            ...

            ANSWER

            Answered 2021-Dec-21 at 05:52

            can you give your

            • package.json
            • node version

            I think that's because of the babel issue / your node version, because it cannot transpile the optional chaining https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

            maybe tried using latest LTS node version? because as far as I know, the latest LTS node version already support optional chaining

            Source https://stackoverflow.com/questions/70431115

            QUESTION

            How to know which module exports a certain function
            Asked 2022-Jan-17 at 23:52

            I was going through this Flux.jl tutorial and came across something called Chain.

            ...

            ANSWER

            Answered 2022-Jan-17 at 17:58

            To figure out where a specific function comes from, you can use the parentmodule function:

            Source https://stackoverflow.com/questions/70745483

            QUESTION

            Why there are multiple calls to DB
            Asked 2021-Dec-18 at 08:50

            I am playing with R2DBC using Postgre SQL. The usecase i am trying is to get the Film by ID along with Language, Actors and Category. Below is the schema

            this is the corresponding piece of code in ServiceImpl

            ...

            ANSWER

            Answered 2021-Dec-17 at 09:28

            I'm not terribly familiar with your stack, so this is a high-level answer to hit on your "Why". There WILL be a more specific answer for you, somewhere down the pipe (e.g. someone that can confirm whether this thread is relevant).

            While I'm no Spring Daisy (or Spring dev), you bind an expression to filmMono that resolves as the query select film.* from film..... You reference that expression four times, and it's resolved four times, in separate contexts. The ordering of the statements is likely a partially-successful attempt by the lib author to lazily evaluate the expression that you bound locally, such that it's able to batch the four accidentally identical queries. You most likely resolved this by collecting into an actual container, and then mapping on that container instead of the expression bound to filmMono.

            In general, this situation is because the options available to library authors aren't good when the language doesn't natively support lazy evaluation. Because any operation might alter the dataset, the library author has to choose between:

            • A, construct just enough scaffolding to fully record all resources needed, copy the dataset for any operations that need to mutate records in some way, and hope that they can detect any edge-cases that might leak the scaffolding when the resolved dataset was expected (getting this right is...hard).
            • B, resolve each level of mapping as a query, for each context it appears in, lest any operations mutate the dataset in ways that might surprise the integrator (e.g. you).
            • C, as above, except instead of duplicating the original request, just duplicate the data...at every step. Pass-by-copy gets real painful real fast on the JVM, and languages like Clojure and Scala handle this by just making the dev be very specific about whether they want to mutate in-place, or copy then mutate.

            In your case, B made the most sense to the folks that wrote that lib. In fact, they apparently got close enough to A that they were able to batch all the queries that were produced by resolving the expression bound to filmMono (which are only accidentally identical), so color me a bit impressed.

            Many access patterns can be rewritten to optimize for the resulting queries instead. Your milage may vary...wildly. Getting familiar with raw SQL, or else a special-purpose language like GraphQL, can give much more consistent results than relational mappers, but I'm ever more appreciative of good IDE support, and mixing domains like that often means giving up auto-complete, context highlighting, lang-server solution-proofs and linting.

            Given that the scope of the question was "why did this happen?", even noting my lack of familiarity with your stack, the answer is "lazy evaluation in a language that doesn't natively support it is really hard."

            Source https://stackoverflow.com/questions/70388853

            QUESTION

            Webflux, with Websocket how to prevent subscribing twice of reactive redis messaging operation
            Asked 2021-Nov-29 at 18:46

            I have a websocket implementation using redis messaging operation on webflux. And what it does is it listens to topic and returns the values via websocket endpoint.

            The problem I have is each time a user sends a message via websocket to the endpoint it seems a brand new redis subscription is made, resulting in the accumulation of subscribers on the redis message topic and the websocket responses are increased with the number of redis topic message subscribtions as well (example user sends 3 messages, redis topic subscriptions are increased to three, websocket connection responses three times).

            Would like to know if there is a way to reuse the same subscription to the messaging topic so it would prevent multiple redis topic subscriptions.

            The code I use is as follows:

            • Websocket Handler

              ...

            ANSWER

            Answered 2021-Nov-29 at 18:46

            Instead of using ReactiveRedisOperations, MessageListener is the way to go here. You can register a listener once, and use the following as the listener.

            Source https://stackoverflow.com/questions/70051118

            QUESTION

            How to check the input dimensions of a model in Flux.jl?
            Asked 2021-Nov-22 at 18:41

            I have a resnet model which I am working with. I originally trained the model using batches of images. Now that it is trained, I want to do inference on a single image (224x224 with 3 color channels). However, when I pass the image to my model via model(imgs[:, :, :, 2]) I get:

            ...

            ANSWER

            Answered 2021-Nov-22 at 18:23

            Sorry, I am really not an expert, but is not the problem that imgs[:, :, :, 2] crates a 3-dimensional tensor? May-be imgs[:, :, :, 2:2] would work, as it makes a four dimensional tensor with the last dimension equal to one (since you have one image)

            Source https://stackoverflow.com/questions/70069956

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

            Vulnerabilities

            No vulnerabilities reported

            Install flux

            Flux is currently available in InfluxDB 1.7 and 2.0, or through the REPL that can be compiled from this repository. To build Flux, first install the GNU pkg-config utility on your system, then ensure the pkg-config wrapper is also installed. If GOBIN is in your PATH, ensure that pkg-config is configured correctly by using which -a.

            Support

            Flux welcomes contributions to the language and the runtime. If you are interested in contributing, please read the contributing guide for more information.
            Find more information at:

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