Learn Kotlinx Coroutines Core framework: coroutial model in the Java class library
Kotlinx Coroutines Core framework is a Java class library for implementing coroutial models.Council is a lightweight concurrent programming mode that can simplify the code design in the scenario of asynchronous operations, multi -threaded processing, and event -driven programming.
The core idea of the correction model is to see the code of asynchronous operation as sequential execution, thereby providing a more intuitive and easy -to -understand programming method.Using corporations, developers can write seemingly synchronized code without considering the underlying details such as thread creation, synchronization and destruction.
The Kotlinx Coroutines Core framework provides a set of classes and functions for definition and management corporate.Below is a simple example that demonstrates the code for the use of the coroutine model to achieve asynchronous operation:
kotlin
import kotlinx.coroutines.*
import java.util.concurrent.Executors
fun main() {
// Create a thread pool for execution coroutine
val executor = Executors.newFixedThreadPool(2).asCoroutineDispatcher()
// Use GlobalScope.launch to create an coroutine
GlobalScope.launch(executor) {
val result1 = async { fetchDataFromNetwork("https://example.com/data1") }
val result2 = async { fetchDataFromNetwork("https://example.com/data2") }
// Waiting for two asynchronous operations to be completed and getting the results
val data1 = result1.await()
val data2 = result2.await()
// Use the obtained results for follow -up operation
processData(data1, data2)
}
// Close the thread pool
executor.close()
}
In the above code, a coroutine was created through the `GlobalScope.launch` and specified a thread pool as a actuator.In the code block of the coroutine, two asynchronous operations were started using the `Async` function, and they were assigned to different threads.You can wait for the asynchronous operation to complete and get the results through the `Await` function.
It should be noted that when using the coroutine, it is necessary to ensure that the thread pool is turned off in the right place to avoid resources leakage.
In addition to the `GlobalScope.launch` and` Await` functions in the above examples, Kotlinx Coroutines Core also provides many other classes and functions for processing abnormalities, cancellation of coroutials, and communication between coroutines.
In order to use the Kotlinx Coroutines Core framework, you need to add a corresponding dependent configuration to the project construction file.The following is an example of using Gradle to build tools:
groovy
dependencies {
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0'
}
By adding the above -mentioned dependencies, you can use Kotlinx Coroutish Core framework in the project.
In summary, the Kotlinx Coroutines Core framework provides a method of simplified concurrency programming, so that the code of asynchronous operations can be more easy to read and maintain.Through appropriate use of coroutines, developers can handle concurrency tasks more efficiently and reduce the complexity in the code.