node-cron | Cron for NodeJS. - | Cron Utils library

 by   kelektiv JavaScript Version: v2.3.0 License: MIT

kandi X-RAY | node-cron Summary

kandi X-RAY | node-cron Summary

node-cron is a JavaScript library typically used in Utilities, Cron Utils, Nodejs, NPM applications. node-cron has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i cron' or download it from GitHub, npm.

Cron for NodeJS.
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            kandi-support Support

              node-cron has a medium active ecosystem.
              It has 7807 star(s) with 643 fork(s). There are 109 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 20 open issues and 511 have been closed. On average issues are closed in 590 days. There are 7 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of node-cron is v2.3.0

            kandi-Quality Quality

              node-cron has 0 bugs and 0 code smells.

            kandi-Security Security

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

            kandi-License License

              node-cron 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

              node-cron releases are available to install and integrate.
              Deployable package is available in npm.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed node-cron and discovered the below as its top functions. This is intended to give you an instant insight into node-cron implemented functionality, and help decide if they suit your requirements.
            • Initialize a new CronTime instance .
            • Create a new crjob instance .
            • Creates a new instance of cron .
            • Calls the callback function with the current time .
            • CCT instance .
            • Wrap a child process with the supplied command .
            • Set timeout .
            Get all kandi verified functions for this library.

            node-cron Key Features

            No Key Features are available at this moment for node-cron.

            node-cron Examples and Code Snippets

            No Code Snippets are available at this moment for node-cron.

            Community Discussions

            QUESTION

            schedule route or controller
            Asked 2022-Apr-16 at 10:07

            i have a controller

            ...

            ANSWER

            Answered 2022-Apr-16 at 10:07

            You got the concept wrongly. Having a scheduled job means running something periodically which has to be a function that does something. You don't need a router defined in it. Your code does only one thing - schedules a router to be available for the user once the scheduled time happens and redefines it every 10 minutes.

            What you need is to create a separate function for the operation and call it on a scheduled time and having a router at this point is extra unless you want to run it when the user sends a request as well.

            Source https://stackoverflow.com/questions/71891798

            QUESTION

            how can i stop node-cron schedule in 'while-loop'
            Asked 2022-Mar-21 at 16:03

            I want to get response for a specific url using node-cron.

            As in the example code below, 'scheduler' requests to specific url every 10 seconds.

            However, I want this action to be performed only 10 times.

            (There may be other ways, but I definitely want to use the 'start' and 'stop' methods of node-crone.)

            I really want to use the while statement.. The code I wrote doesn't wait for the response of the 'start' method, and as a result, an infinite loop is executed.

            I'll leave the code I wrote below, so if you have a solution, please reply. thanks!!

            ...

            ANSWER

            Answered 2022-Mar-21 at 16:03

            A couple things:

            1. Scheduling */10 * * * * *, results in an exception. You'll simply need to remove that last comma.

            2. Take a look at the node-cron code here in GitHub. More on this below.

            When calling start() in a loop, you are essentially scheduling work to be done, then clearing that work to be scheduled in the next call, as the first line in start() clears any previous timers.

            So, let's let node-cron do the scheduling 😃:

            Source https://stackoverflow.com/questions/71540673

            QUESTION

            How to rebuild epoll package in electron?
            Asked 2022-Mar-18 at 11:41

            I try to rebuild an electron app but I got this error regarding the epoll installation.

            ...

            ANSWER

            Answered 2021-Nov-09 at 06:01

            I have a same problem too, but i am using a serialport not epoll.

            So, I think the cause of this problem is electron modules not the native module.

            Source https://stackoverflow.com/questions/69882740

            QUESTION

            Node: Storing function names in a variable and then calling them
            Asked 2022-Mar-17 at 15:58

            I am writing a node application that uses node-cron to schedule certain function to run at specific times. Currently the code for this is embedded in the main application. I want to move the configuration of scheduled tasks out to a config file, so want need to store the function names in a variable to achieve this, as the schedule tasks call out a number of functions in different modules etc.

            For information the syntax to schedule a cron task is this:

            ...

            ANSWER

            Answered 2022-Mar-17 at 15:58

            The reason your code isn't working is that mycronobj[item]schedulefunction is a string so is not invokable. You need to turn this string into a reference to the function with the same name.

            The simplest solution to this is using eval, e.g:

            Source https://stackoverflow.com/questions/71514558

            QUESTION

            Integrat @chilkat/ck-electron16-win-ia32 in electron project
            Asked 2022-Mar-17 at 08:03

            Actualy I try to intgrat but I face to this exception my node version is 16.3.2 32bit

            ...

            ANSWER

            Answered 2022-Mar-17 at 08:03

            SOLVED BY @chilkat Software by upgrading the current version of chilkat/ck-electron16-win64  and win32

            Source https://stackoverflow.com/questions/71427849

            QUESTION

            Prevent the same job to run twice node-cron
            Asked 2022-Feb-21 at 13:55

            I'm working with node and typescript, using node-cron 2.0 to schedule a background operation to run every hour.

            ...

            ANSWER

            Answered 2022-Feb-21 at 13:55

            You can use a Semaphore to prevent parallel calls.

            You will need to know when purgeResponsesSurveys is done. So if it's asynchronous you will need to return Promise or receive a callback that will be called when purgeResponsesSurveys is done.

            I used semaphore npm package. Here is a small example/simulation.

            Source https://stackoverflow.com/questions/71206308

            QUESTION

            Ensure That Node Cron Job is Only Configured Once
            Asked 2022-Feb-14 at 14:01

            I'm writing a Discord bot and having it schedule a cron job when it starts up using node-cron. I've defined it as follows (very basic so far):

            ...

            ANSWER

            Answered 2022-Feb-14 at 14:01

            First, you need somewhere to save the name of the scheduled task, which defaults to a UUID V4 but can be provided as an option using the 3rd argument of the schedule method you are calling above.

            With a reference to this name, either from a database or a constant that is hard-coded in the script you have wrote, you can use cron.getTasks to list all of the scheduled tasks to ensure that the current task doesn't already exist before scheduling it.

            If you are referencing a hard-coded name, then calling the schedule method will replace the existing scheduled task, rather than creating a new task.

            UPDATE

            To set the name of the scheduled task, simply pass in an options object as a third argument to the schedule method you are calling, with a name for your task.

            Example:

            Source https://stackoverflow.com/questions/70910508

            QUESTION

            Most optimal way to execute timed functions in parallel using node?
            Asked 2022-Jan-28 at 10:24

            I'm trying to create a timed scheduler that can execute tasks in parallel. For example:

            Let's say I'm trying to create a function that will do something after 10 seconds of being called. After calling Process_1(), it will be expected to run its intended functionality after 10 seconds.

            But at the 5 second mark while Process_1() is waiting to be executed at the halfway point, I'm now calling Process_2() midway. So at the 10 seconds mark, Process_1() will execute its function and at the 15 seconds mark, Process_2() will execute its function.

            I've tried using node-cron for this but it doesn't seem like it can schedule things in parallel. Thanks in advance!

            ...

            ANSWER

            Answered 2022-Jan-28 at 00:53

            Nodejs runs your Javascript in a single thread unless you explicitly create a WorkerThread and run some code in that. True parallel execution where both jobs are running code that uses the CPU will only be accomplished if you either run each task in a WorkerThread or child process to get it out of the main thread.

            Let me repeat, true parallel execution requires more than one thread or process in nodejs and nodejs does not do that by default so you will have to create a WorkerThread or child_process.

            So, if you have code that takes more than a few ms to do its work and you want it to run at a fairly precise time, then you can't count on the main Javascript thread to do that because it might be busy at that precise time. Timers in Javascript will run your code no earlier than the scheduled time, and when that scheduled time comes around, the event loop is ready to run them, but they won't actually run until whatever was running before finishes and returns control back to the event loop so the event loop can run the code attached to your timer.

            So, if all you're mostly doing is I/O kind of work (reading/writing files or network), then your actual Javascript execution time is probably only milliseconds and nodejs can be very, very responsive to run your timers pretty close to "on time". But, if you have computationally expensive things that keep the CPU busy for much longer, then you can't count on your timers to run "on time" if you run that CPU-heavy stuff in the main thread.

            What you can do, is start up a WorkerThread, set the timer in the WorkerThread and run your code in the worker thread. As long as you don't ask that WorkerThread to run anything else, it should be ready to run that timer pretty much "on time".

            Now WorkerThreads do share some resources with the main thread so they aren't 100% independent (though they are close to independent). If you want 100% independence, then you can start a nodejs child process that runs a node script, sets its own timers and runs its own work in that other process.

            All that said, the single threaded model works very, very well at reasonably high scale for code that is predominantly I/O code because nodejs uses non-blocking I/O so while it's waiting to read or write from file or network, the main thread is free and available to run other things. So, it will often give the appearance of running things in parallel because progress is being made on multiple fronts. The I/O itself inside the nodejs library is either natively non-blocking (network I/O) or is happening in an OS-native thread (file I/O) and the programming interface to Javascript is callback or promise based so it is also non-blocking.

            I mention all this because you don't say what your two operations that you want to run in parallel are (including your actual code allows us to write more complete answers). If they are I/O or even some crypto, then they may already be non-blocking and you may achieve desired parallelism without having to use additional threads or processes.

            Source https://stackoverflow.com/questions/70886675

            QUESTION

            npm ERESOLVE unable to resolve dependency tree NestJs Passport
            Asked 2022-Jan-12 at 22:05

            I have following package.json

            ...

            ANSWER

            Answered 2021-Dec-28 at 13:15

            To resolve this issue update the "passport" lib version in your package.json: from "passport": "^0.5.2", to "passport": "^0.4.0", so it's same as used in @nestjs/passport@8.0.1.

            Source https://stackoverflow.com/questions/70479557

            QUESTION

            Express + Sequelize: hanging the app on connection
            Asked 2021-Dec-26 at 11:52

            I have an app with postgres as db, sequelize, and express, and whenever it receives a db query, it just stays there forever, no logging or anything I run postgres in a container which I can connect to through GUI normally When I swapped it for sqlite, it worked perfectly the application

            here is the relevant piece of code

            ...

            ANSWER

            Answered 2021-Dec-12 at 05:49

            I think it is your "0.0.0.0:5432".

            If local, it should be just "localhost:5432". If deployed server is remote, it should be a certain IP address XXX.XXX.XXX.XXX:5432. If deployed server is home network, it should be "192.168.0.XXX:5432".

            Check your postgres network configuration https://youtu.be/Erqp4C3Y3Ds

            Source https://stackoverflow.com/questions/70321171

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

            Vulnerabilities

            No vulnerabilities reported

            Install node-cron

            You can install using 'npm i cron' or download it from GitHub, npm.

            Support

            Because we can't magically know what you are doing to expose an issue, it is best if you provide a snippet of code. This snippet need not include your secret sauce, but it must replicate the issue you are describing. The issues that get closed without resolution tend to be the ones without code examples. Thanks.
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