Concurrent | Functional Concurrency Primitives | Architecture library

 by   typelift Swift Version: 0.8.0 License: No License

kandi X-RAY | Concurrent Summary

kandi X-RAY | Concurrent Summary

Concurrent is a Swift library typically used in Architecture applications. Concurrent has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Concurrent is a collection of functional concurrency primitives inspired by [Concurrent ML] and [Concurrent Haskell] Traditional approaches to concurrency like locks, latches, and semaphores all fall under the same category of basic resource protection. While this affords them a large measure of simplicity, their use is entirely ad-hoc, and failing to properly lock or unlock critical sections can lead a program to beachball or worse. In addition, though we have become accustomed to performing work on background threads, communication between these threads is frought with peril. The primitives in this library instead focus on merging data with protection, choosing to abstract away the use of locks entirely. By approaching concurrency from the data side, rather than the code side, thread-safety, synchronization, and protection become inherent in types rather than in code.
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            kandi-support Support

              Concurrent has a low active ecosystem.
              It has 206 star(s) with 17 fork(s). There are 12 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 4 open issues and 10 have been closed. On average issues are closed in 125 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of Concurrent is 0.8.0

            kandi-Quality Quality

              Concurrent has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              Concurrent does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              Concurrent releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

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            Concurrent Key Features

            No Key Features are available at this moment for Concurrent.

            Concurrent Examples and Code Snippets

            Benchmarks a concurrent read - and write map .
            javadot img1Lines of Code : 5dot img1License : Permissive (MIT License)
            copy iconCopy
            @Benchmark
                public void randomReadAndWriteConcurrentHashMap() {
                    Map map = new ConcurrentHashMap<>();
                    performReadAndWriteTest(map);
                }  
            Performs a random read operation using a concurrent hash map .
            javadot img2Lines of Code : 5dot img2License : Permissive (MIT License)
            copy iconCopy
            @Benchmark
                public void randomReadConcurrentHashMap() {
                    Map map = new ConcurrentHashMap<>();
                    performReadTest(map);
                }  
            Converts a list of books to a concurrent map .
            javadot img3Lines of Code : 3dot img3License : Permissive (MIT License)
            copy iconCopy
            public Map listToConcurrentMap(List books) {
                    return books.stream().collect(Collectors.toMap(Book::getReleaseYear, Function.identity(), (o1, o2) -> o1, ConcurrentHashMap::new));
                }  

            Community Discussions

            QUESTION

            Concurrent Counter Struct with Type Argument in Rust
            Asked 2021-Jun-15 at 23:55

            I was following along with this tutorial on creating a concurrent counter struct for a usize value: ConcurrentCounter. As I understand it, this wrapper struct allows us to mutate our usize value, with more concise syntax, for example:my_counter.increment(1) vs. my_counter.lock().unwrap().increment(1).

            Now in this tutorial our value is of type usize, but what if we wanted to use a f32, i32, or u32 value instead?

            I thought that I could do this with generic type arguments:

            ...

            ANSWER

            Answered 2021-Jun-15 at 23:55

            I haven't come across such a ConcurrentCounter library, but crates.io is huge, maybe you find something. However, if you are mostly concerned with primitives such as i32, there is a better alternative call: Atomics, definitely worth checking out.

            Nevertheless, your approach of generalizing the ConcurrentCounter is going in a good direction. In the context of operation overloading, std::ops is worth a look. Specifically, you need Add, Sub, and Mul, respectively. Also, you need a Copy bound (alternatively, a Clone would also do). So you were pretty close:

            Source https://stackoverflow.com/questions/67994469

            QUESTION

            Swing JMenuBar not rendering properly
            Asked 2021-Jun-15 at 18:31

            First time actually using anything to do with swing - sorry for the poor code and crude visuals!
            Using swing for a massively over-complicated password checker school project, and when I came to loading in a JMenuBar, it doesn't render properly the first time. Once I run through one of the options first, it reloads correctly, but the first time it comes out like this: First render attempt
            But after I run one of the methods, either by clicking one of the buttons that I added to check if it was just the JFrame that was broken or using one of the broken menu options, it reloads correctly, but has a little grey bar above where the JMenuBar actually renders: Post-method render

            The code for the visuals is as follows:

            ...

            ANSWER

            Answered 2021-Jun-15 at 18:29

            You should separate creating your menu from your content. Please review the following example. I decoupled your menu, component, and event logic into meaningful phases.

            Source https://stackoverflow.com/questions/67991113

            QUESTION

            Micronaut Read Timeout with HttpClient
            Asked 2021-Jun-15 at 16:31

            I'm struggling to use the Micronaut HTTPClient for multiple calls to a third-party REST service without receiving a io.micronaut.http.client.exceptions.ReadTimeoutException

            To remove the third-party dependency, the problem can be reproduced using a simple Micronaut app calling it's own service.

            Example Controller:

            ...

            ANSWER

            Answered 2021-Jun-15 at 09:51

            If this isn't going to throw an exception then I don't know what is going to.

            This is caused by using blocking code within Netty's event loop.

            The code over here is making a blocking request 20 times in a row which cause the machine to break. I don't know what data is coming from the client but I would never recommend to do it in this manner.

            Source https://stackoverflow.com/questions/67973867

            QUESTION

            ProcessPoolExecutor Error, Int is not iterable/subscriptable
            Asked 2021-Jun-15 at 13:46

            I am trying to learn how python handles multiprocessing and have followed a youtube tutorial for some basic code but I am now trying to implement a ProcessPoolExecuter myself.

            I have the following code which is causing the problem:

            ...

            ANSWER

            Answered 2021-Jun-15 at 13:46

            The actual value being passed as the second argument games to getRecentWinners is listOfGames, which as a values of [1, 2, 3 ... 21]. But the first line of getRecentWinners is:

            Source https://stackoverflow.com/questions/67983221

            QUESTION

            "Remote Acknowledge failed: scp: ambiguous target" while uploading files using "scp" from Windows machine, while it works on Linux and Mac
            Asked 2021-Jun-15 at 10:19

            I am trying to run a test case which basically copies a file from my machine to a mock server running in docker. The same test works fine on Mac and Ubuntu. But on Windows it's getting failed with the following error:-

            ...

            ANSWER

            Answered 2021-Mar-31 at 11:29

            The remote path must be /, not \.

            And the argument to createCopyCommand cannot be Path, as on Windows, that will translate the / to \.

            Source https://stackoverflow.com/questions/66844895

            QUESTION

            Java RabbitMQ connection is already closed
            Asked 2021-Jun-15 at 10:14

            I need to push messages to external rabbitmq. My java configuration successfully declares queue to push, but every time I try to push, I have next exception:

            ...

            ANSWER

            Answered 2021-Jun-15 at 07:19

            I'm struggling to understand how that code fits together, but this part strikes me as definitely wrong:

            Source https://stackoverflow.com/questions/67981368

            QUESTION

            bundle exec jekyll serve: cannot load such file
            Asked 2021-Jun-15 at 08:37

            I am trying to contribute to a Github Page/Jekyll site and want to be able to visualise changes locally but when I run bundle exec jekyll serve but I get this output:

            ...

            ANSWER

            Answered 2021-Feb-02 at 16:29

            I had the same problem and I found a workaround here at https://github.com/jekyll/jekyll/issues/8523

            Add gem "webrick" to the Gemfile in your website. Than run bundle install

            At this point you can run bundle exec jekyll serve

            For me it works!

            Source https://stackoverflow.com/questions/65989040

            QUESTION

            Azure Data Explorer High Ingestion Latency with Streaming
            Asked 2021-Jun-15 at 08:34

            We are using stream ingestion from Event Hubs to Azure Data Explorer. The Documentation states the following:

            The streaming ingestion operation completes in under 10 seconds, and your data is immediately available for query after completion.

            I am also aware of the limitations such as

            Streaming ingestion performance and capacity scales with increased VM and cluster sizes. The number of concurrent ingestion requests is limited to six per core. For example, for 16 core SKUs, such as D14 and L16, the maximal supported load is 96 concurrent ingestion requests. For two core SKUs, such as D11, the maximal supported load is 12 concurrent ingestion requests.

            But we are currently experiencing ingestion latency of 5 minutes (as shown on the Azure Metrics) and see that data is actually available for quering 10 minutes after ingestion.

            Our Dev Environment is the cheapest SKU Dev(No SLA)_Standard_D11_v2 but given that we only ingest ~5000 Events per day (per metric "Events Received") in this environment this latency is very high and not usable in the streaming scenario where we need to have the data available < 1 minute for queries.

            Is this the latency we have to expect from the Dev Environment or are the any tweaks we can apply in order to achieve lower latency also in those environments? How will latency behave with a production environment loke Standard_D12_v2? Do we have to expect those high numbers there as well or is there a fundamental difference in behavior between Dev/test and Production Environments in this concern?

            ...

            ANSWER

            Answered 2021-Jun-15 at 08:34

            Did you follow the two steps needed to enable the streaming ingestion for the specific table, i.e. enabling streaming ingestion on the cluster and on the table?

            In general, this is not expected, the Dev/Test cluster should exhibit the same behavior as the production cluster with the expected limitations around the size and scale of the operations, if you test it with a few events and see the same latency it means that something is wrong.

            If you did follow these steps, and it still does not work please open a support ticket.

            Source https://stackoverflow.com/questions/67982425

            QUESTION

            I can't pass parameters to foreach loop while implementing Structured Streaming + Kafka in Spark SQL
            Asked 2021-Jun-15 at 04:42

            I followed the instructions at Structured Streaming + Kafka and built a program that receives data streams sent from kafka as input, when I receive the data stream I want to pass it to SparkSession variable to do some query work with Spark SQL, so I extend the ForeachWriter class again as follows:

            ...

            ANSWER

            Answered 2021-Jun-15 at 04:42

            do some query work with Spark SQL

            You wouldn't use a ForEachWriter for that

            Source https://stackoverflow.com/questions/67972167

            QUESTION

            Working Around Concurrency Limits in AWS Glue
            Asked 2021-Jun-14 at 20:29

            I have a question around how best to manage concurrent job instances in AWS glue.

            I have a job defined like so:

            ...

            ANSWER

            Answered 2021-Jun-14 at 20:29

            The "Max concurrent job runs per account" limit is a soft limit (https://docs.aws.amazon.com/general/latest/gr/glue.html). Maybe log a service request with AWS and ask for an increase in the limit. The second thing is I am not sure how you have implemented your sleep action in the code, maybe instead of doing just a sleep catch the exception each time you make the call, if there is an exception, sleep with an exponential backoff in seconds and try again when sleep time is finished and repeat until your get a positive response OR when you reach your own set limit to stop. This way your processing will not stop until you give up, but just slow down when throtteling kicks in.

            Source https://stackoverflow.com/questions/67976038

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

            Vulnerabilities

            No vulnerabilities reported

            Install Concurrent

            You can download it from GitHub.

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