Code samples for spring @Async annotation.

spring-all/src/test/java/org/baeldung/async/AsyncAnnotationExampleTest.java

@@ -0,0 +1,61 @@
+package org.baeldung.async;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import org.baeldung.async.config.SpringAsyncConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { SpringAsyncConfig.class }, loader = AnnotationConfigContextLoader.class)
+public class AsyncAnnotationExampleTest {
+
+	@Autowired
+	AsyncAnnotationExample asyncAnnotationExample;
+
+	@Test
+	public void testAsyncAnnotationForMethodsWithVoidReturnType() {
+		System.out.println("Start - invoking an asynchronous method. "
+				+ Thread.currentThread().getName());
+		asyncAnnotationExample.asyncMethodWithVoidReturnType();
+		System.out.println("End - invoking an asynchronous method. ");
+	}
+
+	@Test
+	public void testAsyncAnnotationForMethodsWithReturnType()
+			throws InterruptedException, ExecutionException {
+		System.out.println("Start - invoking an asynchronous method. "
+				+ Thread.currentThread().getName());
+		final Future<String> future = asyncAnnotationExample
+				.asyncMethodWithReturnType();
+
+		while (true) {
+			if (future.isDone()) {
+				System.out.println("Result from asynchronous process - "
+						+ future.get());
+				break;
+			}
+			System.out.println("Continue doing something else. ");
+			Thread.sleep(1000);
+		}
+	}
+
+	@Test
+	public void testAsyncAnnotationForMethodsWithConfiguredExecutor() {
+		System.out.println("Start - invoking an asynchronous method. ");
+		asyncAnnotationExample.asyncMethodWithConfiguredExecutor();
+		System.out.println("End - invoking an asynchronous method. ");
+	}
+
+	@Test
+	public void testAsyncAnnotationForMethodsWithException() throws Exception {
+		System.out.println("Start - invoking an asynchronous method. ");
+		asyncAnnotationExample.asyncMethodWithExceptions();
+		System.out.println("End - invoking an asynchronous method. ");
+	}
+}