1 files changed, 77 insertions, 0 deletions
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/executor/AsyncTaskExecutor.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/executor/AsyncTaskExecutor.java
new file mode 100644
index 000000000..7b4d2cfaa
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/executor/AsyncTaskExecutor.java
@@ -0,0 +1,77 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation
+ *  ================================================================================
+ *  Licensed 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
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.inventory.sync.executor;
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Supplier;
+import javax.annotation.PostConstruct;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+public class AsyncTaskExecutor {
+
+    @Value("${modules-sync-watchdog.async-executor.parallelism-level:10}")
+    @Getter
+    private int asyncTaskParallelismLevel;
+    private ExecutorService executorService;
+    private static final int DEFAULT_PARALLELISM_LEVEL = 10;
+
+    /**
+     *  Set up executor service with thread-pool size as per configuration parameter.
+     *  If modules-sync-watchdog.async-executor.parallelism-level not set a default of 10 threads will be applied.
+     */
+    @PostConstruct
+    public void setupThreadPool() {
+        executorService = Executors.newWorkStealingPool(
+                asyncTaskParallelismLevel == 0 ? DEFAULT_PARALLELISM_LEVEL : asyncTaskParallelismLevel);
+    }
+
+    /**
+     * Execute supplied task asynchronously.
+     *
+     * @param taskSupplier    functional method is get() task need to executed asynchronously
+     * @param timeOutInMillis the task timeout value in milliseconds
+     */
+    public void executeTask(final Supplier<Object> taskSupplier, final long timeOutInMillis) {
+        CompletableFuture.supplyAsync(taskSupplier::get, executorService)
+                .orTimeout(timeOutInMillis, MILLISECONDS)
+                .whenCompleteAsync(this::handleTaskCompletion);
+    }
+
+    private void handleTaskCompletion(final Object response, final Throwable throwable) {
+        if (throwable != null) {
+            if (throwable instanceof TimeoutException) {
+                log.warn("Async task didn't completed within the required time.");
+            } else {
+                log.debug("Watchdog async batch failed. caused by : {}", throwable.getMessage());
+            }
+        }
+    }
+}