Github user cesarhernandezgt commented on a diff in the pull request:
https://github.com/apache/tomee/pull/223#discussion_r237923335
--- Diff:
examples/concurrency-utils/src/main/java/org/superbiz/executor/ManagedService.java
---
@@ -0,0 +1,89 @@
+package org.superbiz.executor;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import javax.annotation.Resource;
+import javax.enterprise.concurrent.ManagedExecutorService;
+import javax.enterprise.context.RequestScoped;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Supplier;
+
+import static java.util.Objects.nonNull;
+
+
+@RequestScoped
+public class ManagedService {
+
+ @Resource
+ private ManagedExecutorService executor;
+
+ /**
+ * Executes an opperation asynchronously, in a different thread
provided by the {@link ManagedExecutorService}.
+ * The computation will carry on after the return of the method.
+ *
+ * @param value The demo data.
+ * @return A {@link CompletableFuture} that will return immediately.
+ */
+ public CompletableFuture<Integer> asyncTask(final int value) {
+ return CompletableFuture
+ .supplyAsync(delayedTask(value, 100, null), executor) //
Execute asynchronously.
+ .thenApply(i -> i + 1); // After the return of the task,
do something else with the result.
+ }
+
+ /**
+ * Executes an opperation asynchronously, in a different thread
provided by the {@link ManagedExecutorService}.
+ * The computation will carry on after the return of the method.
+ *
+ * @param value The demo data.
+ * @return A {@link CompletableFuture} that will return immediately.
+ */
+ public CompletableFuture<Integer> asyncTaskWithException(final int
value) {
--- End diff --
It would be nice to print also a message like in the asyncTask.
I also need to perform this on the example I'm running. I think it provides
more visibility if the reader executes everything from command line.
---
