completablefuture | Java 8 - asynchronous processing done right

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kandi X-RAY | completablefuture Summary

completablefuture is a HTML library typically used in Networking applications. completablefuture has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

CompletableFuture in Java 8 - asynchronous processing done right

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Quality

Security

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Support

completablefuture has a low active ecosystem.

It has 149 star(s) with 103 fork(s). There are 16 watchers for this library.

It had no major release in the last 6 months.

completablefuture has no issues reported. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of completablefuture is current.

Quality

completablefuture has no bugs reported.

Security

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

License

completablefuture does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

completablefuture releases are not available. You will need to build from source code and install.

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completablefuture Key Features

No Key Features are available at this moment for completablefuture.

completablefuture Examples and Code Snippets

Use CompletableFuture asynchronously .

java

Lines of Code : 10

License : Permissive (MIT License)

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public static void usingCompletableFuture() throws InterruptedException, ExecutionException, Exception {
        CompletableFuture completableFuture = hello()
            .thenComposeAsync(hello -> mergeWorld(hello))
            .thenAcceptAsync(h

Calculates the factorial using CompletableFuture .

java

Lines of Code : 5

License : Permissive (MIT License)

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@Loggable
    public static Future factorialUsingCompletableFuture(int number) {
        CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> factorial(number));
        return completableFuture;
    }

Returns a CompletableFuture with the given name .

java

Lines of Code : 4

License : Permissive (MIT License)

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public static CompletableFuture hello() {
        CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> "Hello");
        return completableFuture;
    }

Community Discussions

Trending Discussions on completablefuture

"Remote Acknowledge failed: scp: ambiguous target" while uploading files using "scp" from Windows machine, while it works on Linux and Mac

Optimizing method with list of 500k+ elements

Spring Cassandra time out query 'SELECT * FROM system_schema.tables' timed out after PT2S

Transpose from Consumer to CompletableFuture

"Logging in Python" with EduTools Plugin: "Failed to launch checking"

How to use supplyAsync of CompletableFuture to run the same method with multiple inputs each time?

Short circuiting the chain of CompletionStage

How do I properly publish tombstone messages to compacted kafka topic from within a quarkus application?

Can I repeat method using CompletableFuture until value is true

Java GUI - Progress bar doesn't update until the async task is finished

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

Optimizing method with list of 500k+ elements

Asked 2021-Jun-11 at 17:39

I'm looking for some help since I don't know how to optimize a process.

I have to invoke a service that returns a list with more than 500K elements (I don't know why, these services belongs to the client), per each element of the list, I have to invoke 2 more services and then save some attributes in our database, this last step is not the problem, but the entire process took between 1 and 2 seconds per element, so with this time is going to take like more of 100 hours to complete the process. My approach is the following, I have my main method, inside this method I get the large list, then I use a parallelStream to iterate in the elements of the list and then I use a CompletableFuture to call the method that invokes the 2 services mentioned above. I've tried changing the parallelStream to stream and for-each , tried to split the main list into smaller lists and many other things but I don't see a better performance, I think the problem is the invocation of those 2 services but I want to try luck asking here.

I'm using java 11, spring, and for the invocation of the services I'm using RestTemplate, and this is my code:

...

ANSWER

Answered 2021-May-19 at 14:02

As you haven't defined an executor you are using the default pool. Adding an executor allow you to create many threads as you needed and the server resources can manage

Source https://stackoverflow.com/questions/67597695

QUESTION

Spring Cassandra time out query 'SELECT * FROM system_schema.tables' timed out after PT2S

Asked 2021-Jun-10 at 14:20

I am using Spring Boot 2.4.4 and Spring Data Cassandra dependency to connect to the Cassandra database. During the application startup, I am getting a DriverTimeout error (I am using VPN).

I have gone through all the Stack Overflow questions similar to this and none of them worked for me. I have cross-posted the same question on the Spring Boot official page here.

I used below configuration properties below -

...

ANSWER

Answered 2021-Apr-23 at 08:35

The DriverTimeoutException gets thrown when the driver doesn't get a reply from the coordinator node. It uses the basic request timeout default of 2 seconds:

Source https://stackoverflow.com/questions/67217692

QUESTION

Transpose from Consumer to CompletableFuture

Asked 2021-Jun-10 at 03:04

I'm currently using an API which I unfortunately cannot change easily. This API has some methods in the style of this:

...

ANSWER

Answered 2021-Jun-10 at 03:04

Something along the lines should work:

Source https://stackoverflow.com/questions/67913858

QUESTION

"Logging in Python" with EduTools Plugin: "Failed to launch checking"

Asked 2021-May-31 at 12:53

What had happened?

I'm trying to follow the Logging in Python Tutorial in PyCharm Professional.

I'm using a Virtualenv environment with Python 3.9.5 in this tutorial. Everything works fine, but when I press "Check" button in the Task Description panel, I get this error:

Failed to launch checking. For more information, see the Troubleshooting guide.

But when I switch to Run panel, all tests are passed with these outputs:

...

ANSWER

Answered 2021-May-31 at 12:53

Do you have the Chinese (Simplified) Language Pack enabled in your PyCharm Professional 2021.1.1? If so, please try disabling it and opening the course once again.

There's a compatibility issue between mentioned language pack and Python courses in the EduTools plugin, and the developers are currently investigating it.

I would advise adding this issue to your watch list to be 100% sure that you won't miss any updates.

Source https://stackoverflow.com/questions/67752668

QUESTION

How to use supplyAsync of CompletableFuture to run the same method with multiple inputs each time?

Asked 2021-May-26 at 17:25

I have the following code where I create a supplier and use the completableFuture's supplyAsync method to invoke another method after async execution.

...

ANSWER

Answered 2021-May-25 at 21:15

You can create new Supplier on the fly inside the loop.

Source https://stackoverflow.com/questions/67695231

QUESTION

Short circuiting the chain of CompletionStage

Asked 2021-May-21 at 20:00

I am using Java 8 and I have a chain of CompletionStage that I am trying to run.

I don't want to use join() or get(), I want to explicity complete the CompletionStage.

I am trying to run two database queries, the second has dependency on the result of the first query. I am starting a database transaction using session, running write query1, write query2 and only if both are successful I want to commit the transaction or else roll it back. The transaction and session are part of Neo4j java API https://neo4j.com/docs/api/java-driver/current/org/neo4j/driver/async/AsyncSession.html#writeTransactionAsync-org.neo4j.driver.async.AsyncTransactionWork-

After running both queries success/failure I want to close the session(a standard database practice)

Here is psuedo code -

...

ANSWER

Answered 2021-May-21 at 19:59

When you throw that CustomException, firstFuture is not completed. As a matter of fact, nothing happens to it. Because it is not completed (successfully), this:

Source https://stackoverflow.com/questions/67631513

QUESTION

How do I properly publish tombstone messages to compacted kafka topic from within a quarkus application?

Asked 2021-May-19 at 14:04

From within a Quarkus application I need to publish tombstone messages to a compacted Apache Kafka topic. As my use-case is imperative I use an Emitter for sending messages to the topic (as suggested in the quarkus blog). The code for non-tombstone messages (with payload) is:

...

ANSWER

Answered 2021-May-19 at 14:04

I would recommend using the Record class (see documentation). A Record is a key/value pair, which represents the key and value of the Kafka record to write. Both can be null, but in your case, only the value part should be null: Record.of(key, null);.

So, you need to change the type of the Emitter to be Record, such as:

Source https://stackoverflow.com/questions/67601699

QUESTION

Can I repeat method using CompletableFuture until value is true

Asked 2021-May-13 at 11:04

I have a Java method that gets a value from a database table cell. Let's name it jdbcTemplate.queryForObject()

I want to run this method once per 2 minutes until the value of the cell becomes true.

Is it possible to achieve this using CompletableFuture?

...

ANSWER

Answered 2021-May-13 at 09:04

No.

A CompletableFuture is a mechanism for delivering a result from one thread to another. It doesn't have any functionality for computing things or repeating things.
A CompletableFuture returns one value only. Once it has been "completed", the value cannot be changed. You can call complete multiple times with different values, but they will be ignored according to the javadoc.

Of course, you could write some code that repeatedly queries the database, and only calls complete(...) when the database cell becomes true. But that's not using CompletableFuture to do the repeated queries.

Source https://stackoverflow.com/questions/67516480

QUESTION

Java GUI - Progress bar doesn't update until the async task is finished

Asked 2021-May-12 at 09:13

I am using CompletableFuture to run a long running operation. Meanwhile, i use SwingWorker to update a progress bar with increments of 5.

...

ANSWER

Answered 2021-May-11 at 22:14

This will update the progress bar, but it will immediately reach 100% since the SwingWorker is looping continuously.

You should get the actual progress value from the async task, either by polling the task or (better) using the observer pattern.

In the latter case you can remove the swing worker and directly update the progress bar in the observer callback method.

Source https://stackoverflow.com/questions/67494618

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

Vulnerabilities

No vulnerabilities reported

Install completablefuture

You can download it from GitHub.

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