[ONOS-6267] Support configurable Executors for primitives
- Support user-provided Executors in primitive builders
- Implement default per-partition per-primitive serial executor using a shared thread pool
- Implement Executor wrappers for all primitive types

Change-Id: I53acfb173a9b49a992a9a388983791d9735ed54a
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/ExecutingAsyncAtomicCounter.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/ExecutingAsyncAtomicCounter.java
new file mode 100644
index 0000000..5d72838
--- /dev/null
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/ExecutingAsyncAtomicCounter.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.store.primitives.impl;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+
+import org.onlab.util.Tools;
+import org.onosproject.store.service.AsyncAtomicCounter;
+
+/**
+ * {@link AsyncAtomicCounter} that executes asynchronous callbacks on a user provided
+ * {@link Executor}.
+ */
+public class ExecutingAsyncAtomicCounter extends ExecutingDistributedPrimitive implements AsyncAtomicCounter {
+    private final AsyncAtomicCounter delegateCounter;
+    private final Executor executor;
+
+    public ExecutingAsyncAtomicCounter(AsyncAtomicCounter delegateCounter, Executor executor) {
+        super(delegateCounter, executor);
+        this.delegateCounter = delegateCounter;
+        this.executor = executor;
+    }
+
+    @Override
+    public CompletableFuture<Long> incrementAndGet() {
+        return Tools.asyncFuture(delegateCounter.incrementAndGet(), executor);
+    }
+
+    @Override
+    public CompletableFuture<Long> getAndIncrement() {
+        return Tools.asyncFuture(delegateCounter.getAndIncrement(), executor);
+    }
+
+    @Override
+    public CompletableFuture<Long> getAndAdd(long delta) {
+        return Tools.asyncFuture(delegateCounter.getAndAdd(delta), executor);
+    }
+
+    @Override
+    public CompletableFuture<Long> addAndGet(long delta) {
+        return Tools.asyncFuture(delegateCounter.addAndGet(delta), executor);
+    }
+
+    @Override
+    public CompletableFuture<Long> get() {
+        return Tools.asyncFuture(delegateCounter.get(), executor);
+    }
+
+    @Override
+    public CompletableFuture<Void> set(long value) {
+        return Tools.asyncFuture(delegateCounter.set(value), executor);
+    }
+
+    @Override
+    public CompletableFuture<Boolean> compareAndSet(long expectedValue, long updateValue) {
+        return Tools.asyncFuture(delegateCounter.compareAndSet(expectedValue, updateValue), executor);
+    }
+}