diff --git a/core-java-modules/core-java-concurrency-advanced-3/pom.xml b/core-java-modules/core-java-concurrency-advanced-3/pom.xml index df9834181f..8f275f4043 100644 --- a/core-java-modules/core-java-concurrency-advanced-3/pom.xml +++ b/core-java-modules/core-java-concurrency-advanced-3/pom.xml @@ -23,6 +23,37 @@ ${assertj.version} test + + + com.jcabi + jcabi-aspects + ${jcabi-aspects.version} + + + + org.aspectj + aspectjrt + ${aspectjrt.version} + runtime + + + + com.google.guava + guava + ${guava.version} + + + + org.cactoos + cactoos + ${cactoos.version} + + + + com.ea.async + ea-async + ${ea-async.version} + @@ -36,6 +67,30 @@ ${maven.compiler.target} + + com.jcabi + jcabi-maven-plugin + ${jcabi-maven-plugin.version} + + + + ajc + + + + + + org.aspectj + aspectjtools + ${aspectjtools.version} + + + org.aspectj + aspectjweaver + ${aspectjweaver.version} + + + @@ -49,6 +104,14 @@ 3.14.0 1.8 1.8 + 0.22.6 + 1.9.5 + 28.2-jre + 0.43 + 1.2.3 + 0.14.1 + 1.9.1 + 1.9.1 diff --git a/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/EAAsyncExample.java b/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/EAAsyncExample.java new file mode 100644 index 0000000000..c7c893e731 --- /dev/null +++ b/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/EAAsyncExample.java @@ -0,0 +1,57 @@ +package com.baeldung.async; + +import static com.ea.async.Async.await; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutionException; + +import com.ea.async.Async; + +public class EAAsyncExample { + + static { + Async.init(); + } + + public static void main(String[] args) throws Exception { + usingCompletableFuture(); + usingAsyncAwait(); + } + + public static void usingCompletableFuture() throws InterruptedException, ExecutionException, Exception { + CompletableFuture completableFuture = hello() + .thenComposeAsync(hello -> mergeWorld(hello)) + .thenAcceptAsync(helloWorld -> print(helloWorld)) + .exceptionally( throwable -> { + System.out.println(throwable.getCause()); + return null; + }); + completableFuture.get(); + } + + public static CompletableFuture hello() { + CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> "Hello"); + return completableFuture; + } + + public static CompletableFuture mergeWorld(String s) { + CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> { + return s + " World!"; + }); + return completableFuture; + } + + public static void print(String str) { + CompletableFuture.runAsync(() -> System.out.println(str)); + } + + private static void usingAsyncAwait() { + try { + String hello = await(hello()); + String helloWorld = await(mergeWorld(hello)); + await(CompletableFuture.runAsync(() -> print(helloWorld))); + } catch (Exception e) { + e.printStackTrace(); + } + } + +} diff --git a/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/JavaAsync.java b/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/JavaAsync.java new file mode 100644 index 0000000000..6f36f46154 --- /dev/null +++ b/core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/async/JavaAsync.java @@ -0,0 +1,183 @@ +package com.baeldung.async; + +import static com.ea.async.Async.await; + +import java.util.concurrent.Callable; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.Future; + +import com.google.common.util.concurrent.AsyncCallable; +import com.google.common.util.concurrent.Callables; +import com.google.common.util.concurrent.Futures; +import com.google.common.util.concurrent.ListenableFuture; +import com.google.common.util.concurrent.ListeningExecutorService; +import com.google.common.util.concurrent.MoreExecutors; +import com.jcabi.aspects.Async; +import com.jcabi.aspects.Loggable; + +public class JavaAsync { + + static { + com.ea.async.Async.init(); + } + + private static final ExecutorService threadpool = Executors.newCachedThreadPool(); + + public static void main (String[] args) throws InterruptedException, ExecutionException { + int number = 20; + + //Thread Example + factorialUsingThread(number).start(); + + //FutureTask Example + Future futureTask = factorialUsingFutureTask(number); + System.out.println("Factorial of " + number + " is: " + futureTask.get()); + + // CompletableFuture Example + Future completableFuture = factorialUsingCompletableFuture(number); + System.out.println("Factorial of " + number + " is: " + completableFuture.get()); + + // EA Async example + System.out.println("Factorial of " + number + " is: " + factorialUsingEAAsync(number)); + + // cactoos async example + Future asyncFuture = factorialUsingCactoos(number); + System.out.println("Factorial of " + number + " is: " + asyncFuture.get()); + + // Guava example + ListenableFuture guavaFuture = factorialUsingGuavaServiceSubmit(number); + System.out.println("Factorial of " + number + " is: " + guavaFuture.get()); + + ListenableFuture guavaFutures = factorialUsingGuavaFutures(number); + System.out.println("Factorial of " + number + " is: " + guavaFutures.get()); + + // @async jcabi-aspect example + Future aspectFuture = factorialUsingJcabiAspect(number); + System.out.println("Factorial of " + number + " is: " + aspectFuture.get()); + + } + + /** + * Finds factorial of a number + * @param number + * @return + */ + public static long factorial(int number) { + long result = 1; + for(int i=number;i>0;i--) { + result *= i; + } + return result; + } + + /** + * Finds factorial of a number using Thread + * @param number + * @return + */ + @Loggable + public static Thread factorialUsingThread(int number) { + Thread newThread = new Thread(() -> { + System.out.println("Factorial of " + number + " is: " + factorial(number)); + }); + + return newThread; + } + + /** + * Finds factorial of a number using FutureTask + * @param number + * @return + */ + @Loggable + public static Future factorialUsingFutureTask(int number) { + Future futureTask = threadpool.submit(() -> factorial(number)); + + while (!futureTask.isDone()) { + System.out.println("FutureTask is not finished yet..."); + } + + return futureTask; + } + + /** + * Finds factorial of a number using CompletableFuture + * @param number + * @return + */ + @Loggable + public static Future factorialUsingCompletableFuture(int number) { + CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> factorial(number)); + return completableFuture; + } + + /** + * Finds factorial of a number using EA Async + * @param number + * @return + */ + @Loggable + public static long factorialUsingEAAsync(int number) { + CompletableFuture completableFuture = CompletableFuture.supplyAsync(() -> factorial(number)); + long result = await(completableFuture); + return result; + } + + /** + * Finds factorial of a number using Async of Cactoos + * @param number + * @return + * @throws InterruptedException + * @throws ExecutionException + */ + @Loggable + public static Future factorialUsingCactoos(int number) throws InterruptedException, ExecutionException { + org.cactoos.func.Async asyncFunction = new org.cactoos.func.Async(input -> factorial(input)); + Future asyncFuture = asyncFunction.apply(number); + return asyncFuture; + } + + /** + * Finds factorial of a number using Guava's ListeningExecutorService.submit() + * @param number + * @return + */ + @Loggable + public static ListenableFuture factorialUsingGuavaServiceSubmit(int number) { + ListeningExecutorService service = MoreExecutors.listeningDecorator(threadpool); + ListenableFuture factorialFuture = (ListenableFuture) service.submit(()-> factorial(number)); + return factorialFuture; + } + + /** + * Finds factorial of a number using Guava's Futures.submitAsync() + * @param number + * @return + */ + @Loggable + public static ListenableFuture factorialUsingGuavaFutures(int number) { + ListeningExecutorService service = MoreExecutors.listeningDecorator(threadpool); + AsyncCallable asyncCallable = Callables.asAsyncCallable(new Callable() { + public Long call() { + return factorial(number); + } + }, service); + return Futures.submitAsync(asyncCallable, service); + } + + /** + * Finds factorial of a number using @Async of jcabi-aspects + * @param number + * @return + */ + @Async + @Loggable + public static Future factorialUsingJcabiAspect(int number) { + Future factorialFuture = CompletableFuture.supplyAsync(() -> factorial(number)); + return factorialFuture; + } + +}