threadpool | Web worker thread pool library | Architecture library

 by   js-platform JavaScript Version: Current License: BSD-3-Clause

kandi X-RAY | threadpool Summary

kandi X-RAY | threadpool Summary

threadpool is a JavaScript library typically used in Architecture applications. threadpool has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Web worker thread pool library
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            kandi-support Support

              threadpool has a low active ecosystem.
              It has 20 star(s) with 3 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              threadpool has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of threadpool is current.

            kandi-Quality Quality

              threadpool has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              threadpool is licensed under the BSD-3-Clause License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              threadpool releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            threadpool Key Features

            No Key Features are available at this moment for threadpool.

            threadpool Examples and Code Snippets

            No Code Snippets are available at this moment for threadpool.

            Community Discussions

            QUESTION

            for loop Multiprocessing or Multithreading in Python
            Asked 2021-Jun-13 at 18:03

            I have the following three for loop (two of them are nested) in python. The API requests should be sent concurrently. How to parallelized the execution?

            ...

            ANSWER

            Answered 2021-Jun-13 at 18:03

            Looking at the three instances of apiString and rewriting them to use the more succinct F-strings, they all appear to be of the form:

            Source https://stackoverflow.com/questions/67916776

            QUESTION

            java how to create thread pool for stream operation
            Asked 2021-Jun-12 at 20:33

            I like to control the thread execution when using streams with a thread pool. Currently i have List of string

            ...

            ANSWER

            Answered 2021-Jun-12 at 20:33

            The code compiles and runs fine, once the code errors are fixed (str => s).

            Common Pool

            Source https://stackoverflow.com/questions/67952425

            QUESTION

            Get C FILE pointer from bytes::Bytes in Rust
            Asked 2021-Jun-12 at 13:29

            I would like to read a GRIB file downloaded from server using ecCodes library in Rust. However, my current solution results in segmentation fault. The extracted example, replicating the problem, is below.

            I download the file using reqwest crate and get the response as Bytes1 using bytes(). To read the file with ecCodes I need to create a codes_handle using codes_grib_handle_new_from_file()2, which as argument requires *FILE usually get from fopen(). However, I would like to skip IO operations. So I figured I could use libc::fmemopen() to get *FILE from Bytes. But when I pass the *mut FILE from fmemopen() to codes_grib_handle_new_from_file() segmentation fault occurs.

            I suspect the issue is when I get from Bytes a *mut c_void required by fmemopen(). I figured I can do this like that:

            ...

            ANSWER

            Answered 2021-Jun-12 at 13:29

            QUESTION

            how to keep a gap of 5 seconds in every batch of request in c#
            Asked 2021-Jun-06 at 14:49

            I have a written an application in c# that receives a request from another application and sends a request to an external broker via HTTP. broker accepts only 40 requests at a time. so I have a config where I mention the count. Broker is asking us to send 40 requests in one batch and another 40 in another batch but there should be a gap of 5 seconds. my question is how to call a method at a specific time. Presently 2 batches each with 40 requests go at the same time. My Present code looks like this. I need some idea how can I handle this .. Help will be highly appreciated. thanks.

            ...

            ANSWER

            Answered 2021-Jun-06 at 14:49

            Add the following code before calling the method:

            Source https://stackoverflow.com/questions/67860188

            QUESTION

            Downloading multiple urls with threadpool
            Asked 2021-Jun-03 at 19:08

            I having problem downloading multiple urls. My code still only download 1 url per session. Still need to finish the first one before downloading the next one.

            I want to download like 3 urls at the same time.

            Here's my code:

            ...

            ANSWER

            Answered 2021-Jun-03 at 19:08

            QUESTION

            Generator in threading
            Asked 2021-Jun-03 at 03:27

            I have a generator that returns me a certain string, how can I use it together with this code?

            ...

            ANSWER

            Answered 2021-Jun-03 at 03:27

            Essentially the same question that was posed here.

            The essence is that multiprocessing will convert any iterable without a __len__ method into a list.

            There is an open issue to add support for generators but for now, you're SOL.

            If your array is too big to fit into memory, consider reading it in in chunks, processing it, and dumping the results to disk in chunks. Without more context, I can't really provide a more concrete solution.

            UPDATE:

            Thanks for posting your code. My first question, is it absolutely necessary to use multiprocessing? Depending on what my_function does, you may see no benefit to using a ThreadPool as python is famously limited by the GIL so any CPU bound worker function wouldn't speed up. In this case, maybe a ProcessPool would be better. Otherwise, you are probably better off just running results = map(my_function, generator).

            Of course, if you don't have the memory to load the input data, it is unlikely you will have the memory to store the results.

            Secondly, you can improve your generator by using itertools

            Try:

            Source https://stackoverflow.com/questions/67814650

            QUESTION

            Spring Rabbit CachingConnectionFactory Thread Pool
            Asked 2021-Jun-02 at 19:21

            I have around 10 different rabbit mq queues in 10 different virtual hosts to connect to. For each queue, a separate SimpleMessageListenerContainer bean is defined in my spring boot application and a separate Spring Integration flow is created using each specific SimpleMessageListenerContainer.

            The concurrency for SimpleMessageListenerContainer is set to 1-3. Each of the SimpleMessageListenerContainer bean is using separate CachingConnectoryFacory beans. The Connection Factory mode is set as CHANNEL.

            We also have another IntegrationFlow to publish messages to an outbound queue that is using a different connection factory. I am not setting any ThreadPool Task Executors in the ConnectionFactory, so it using the default one. While doing the Load test we are noticing that the multiple thread pool (prefixed with pool-) are getting crated and after a certain point application crashes may due to the high number of threads.

            It looks like the default thread pool executor is having max value of Integer unbounded which may spinning up threads based on the demand. I tried setting custom Thread Pool task executors for each connection factory and I noticed that the threads are not growing like previously but from the java profiler it shows the SimpleMessageListenerContainer threads are getting BLOCKED frequently.

            I want to know if there any best practices or to be followed while setting the custom thread pool task executors in the connection factory like a ratio between Lisneter threads and connection factory threads etc?

            ...

            ANSWER

            Answered 2021-May-27 at 19:45

            I have done some debugging; ...-1 gets renamed to, for example AMQP Connection 127.0.0.1:5672.

            That thread is not from the pool, but it is created by the same thread factory.

            Similarly, the scheduled executor (for heartbeats) uses the same thread factory, and gets ...-2.

            Hence the pool starts at ...-3. So indeed, you have a fixed pool of 8 threads, an I/O thread, and a heartbeat thread for each factory.

            With a large number of factories like that, you probably don't need so many threads; I would suggest a single pooled executor with sufficient threads to satisfy your workload; experimentation is probably the only way to determine the number, but I would guess it's something less than 88 (11x8).

            Source https://stackoverflow.com/questions/67709735

            QUESTION

            JAX-RS and RegEx @Paths with spaces
            Asked 2021-May-27 at 19:58

            Spaces in URIs are allowed if they're encoded, as discussed here.

            JAX-RS (Jersey on Payara) doesn't seem to allow spaces defined in the path regex pattern.

            ...

            ANSWER

            Answered 2021-May-27 at 19:58

            Regex patterns are not encoded, but Jersey match URLs in encoded form.

            This workaround should work:

            Source https://stackoverflow.com/questions/67709901

            QUESTION

            Rust showing expected trait object `dyn Future`, found opaque type when passing function as a param
            Asked 2021-May-25 at 06:45
            use std::io::prelude::*;
            use std::net::TcpListener;
            use std::net::TcpStream;
            use std::time::Duration;
            
            // pyO3 module
            use pyo3::prelude::*;
            use pyo3::wrap_pyfunction;
            
            use std::future::Future;
            
            #[pyfunction]
            pub fn start_server() {
                let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
                let pool = ThreadPool::new(4);
            
                for stream in listener.incoming() {
                    let stream = stream.unwrap();
            
                    pool.execute(|| {
                        let rt = tokio::runtime::Runtime::new().unwrap();
                        handle_connection(stream, rt, &test_helper);
                    });
                }
            }
            
            #[pymodule]
            pub fn roadrunner(_: Python<'_>, m: &PyModule) -> PyResult<()> {
                m.add_wrapped(wrap_pyfunction!(start_server))?;
                Ok(())
            }
            
            async fn read_file(filename: String) -> String {
                let con = tokio::fs::read_to_string(filename).await;
                con.unwrap()
            }
            
            async fn test_helper(contents: &mut String, filename: String) {
                // this function will accept custom function and return
                *contents = tokio::task::spawn(read_file(filename.clone()))
                    .await
                    .unwrap();
            }
            
            pub fn handle_connection(
                mut stream: TcpStream,
                runtime: tokio::runtime::Runtime,
                test: &dyn Fn(&mut String, String) -> (dyn Future + 'static),
            ) {
                let mut buffer = [0; 1024];
                stream.read(&mut buffer).unwrap();
            
                let get = b"GET / HTTP/1.1\r\n";
                let sleep = b"GET /sleep HTTP/1.1\r\n";
            
                let (status_line, filename) = if buffer.starts_with(get) {
                    ("HTTP/1.1 200 OK", "hello.html")
                } else if buffer.starts_with(sleep) {
                    thread::sleep(Duration::from_secs(5));
                    ("HTTP/1.1 200 OK", "hello.html")
                } else {
                    ("HTTP/1.1 404 NOT FOUND", "404.html")
                };
            
                let mut contents = String::new();
                let future = test_helper(&mut contents, String::from(filename));
                runtime.block_on(future);
            
                let response = format!(
                    "{}\r\nContent-Length: {}\r\n\r\n{}",
                    status_line,
                    contents.len(),
                    contents
                );
            
                stream.write(response.as_bytes()).unwrap();
                stream.flush().unwrap();
            }
            
            
            ...

            ANSWER

            Answered 2021-May-25 at 06:45

            You are writing a function type that returns a dyn type, not a reference to it, but the unsized type itself, that is not possible. Every time you want to write something like this, try using a generic instead:

            Source https://stackoverflow.com/questions/67682758

            QUESTION

            MariaDB optimization for Woocommerce store with more than 55k articles on sale soon
            Asked 2021-May-24 at 18:37

            and I appreciate in advance for your help on this. I have a VPS with the following specs:

            OS: Centos 7.x CPU Model: Common KVM processor CPU Details: 6 Core(2200 MHz) Distro Name: CentOS Linux release 7.9.2009 (Core) Kernel Version: 3.10.0-1160.25.1.el7.x86_64 Database: Server type: MariaDB Server version: 10.2.38-MariaDB - MariaDB Server

            And here is mu sqltuner output from letting it run after 48 hours and uptime.

            ...

            ANSWER

            Answered 2021-May-24 at 18:37

            Rules for memory allocation.

            • Do not allocate so much RAM that swapping will occur. Swapping is terrible for MySQL/MariaDB performance.
            • Do adjust innodb_buffer_pool_size such that most of RAM is in use during normal time and even for spikes in activity. (I often say "set it to 70% of available RAM", but you are asking for more details.)
            • Do not bother changing other settings; they add to the complexity of "getting it right".

            There are 3 situations (based on innodb_buffer_pool_size and dataset size):

            • Tiny dataset -- buffer_pool is bigger than necessary --> wasting some of RAM, but so what; it is not useful for anything else. And it give you some room for growth.
            • Medium-sized dataset -- Most activity is done in RAM; the system will run nicely.
            • Big dataset -- The system may be I/O-bound. Adding RAM is a costly and brute force solution. However, some software techniques (eg, better indexes) may help, such as this for WordPress and WooCommerce.

            Source https://stackoverflow.com/questions/67658920

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

            Vulnerabilities

            No vulnerabilities reported

            Install threadpool

            You can download it from GitHub.

            Support

            Come find me on irc.mozilla.org in #games (my name is ack). I also love to accept pull requests.
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            https://github.com/js-platform/threadpool.git

          • CLI

            gh repo clone js-platform/threadpool

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            git@github.com:js-platform/threadpool.git

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