Shared Executors implementation , (ONOS-1302)
Change-Id: I7fe5e415bf605c198d3bb42328477aef396c5c89
diff --git a/utils/misc/src/main/java/org/onlab/util/SharedExecutors.java b/utils/misc/src/main/java/org/onlab/util/SharedExecutors.java
new file mode 100644
index 0000000..5c96d3b
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+++ b/utils/misc/src/main/java/org/onlab/util/SharedExecutors.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2015 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.onlab.util;
+
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import static org.onlab.util.Tools.groupedThreads;
+
+/**
+ * SharedExecutors is designed to use thread pool for applications.
+ * SharedExecutors is recommended for applications instead of creating new thread groups.
+ */
+public final class SharedExecutors {
+
+ private static int numberOfThreads = 30;
+
+ private static ExecutorService singleThreadExecutor =
+ Executors.newSingleThreadExecutor(groupedThreads("onos/shared", "onos-single-executor"));
+
+ private static ExecutorService poolThreadExecutor =
+ Executors.newFixedThreadPool(numberOfThreads, groupedThreads("onos/shared", "onos-pool-executor-%d"));
+
+ private static java.util.Timer sharedTimer =
+ new java.util.Timer("onos-shared-timer");
+
+
+
+ private SharedExecutors() {
+
+ }
+
+ /**
+ * Returns the single thread executor.
+ *
+ * @return shared single thread executor
+ */
+ public static ExecutorService getSingleThreadExecutor() {
+ return singleThreadExecutor;
+ }
+ /**
+ * Returns the pool thread executor.
+ *
+ * @return shared executor pool
+ */
+ public static ExecutorService getPoolThreadExecutor() {
+ return poolThreadExecutor;
+ }
+ /**
+ * Returns the pool timer.
+ *
+ * @return shared timer
+ */
+ public static java.util.Timer getTimer() {
+ return sharedTimer;
+ }
+
+
+
+
+}
diff --git a/utils/misc/src/test/java/org/onlab/util/SharedExecutorsTest.java b/utils/misc/src/test/java/org/onlab/util/SharedExecutorsTest.java
new file mode 100644
index 0000000..1730ca1
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+++ b/utils/misc/src/test/java/org/onlab/util/SharedExecutorsTest.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 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.onlab.util;
+
+import org.junit.Test;
+
+import java.util.concurrent.ExecutorService;
+
+import static org.junit.Assert.*;
+
+/**
+ * Tests of the SharedExecutors Test.
+ */
+public class SharedExecutorsTest {
+
+ @Test
+ public void singleThread() {
+ ExecutorService a = SharedExecutors.getSingleThreadExecutor();
+ assertNotNull("ExecutorService must not be null", a);
+ ExecutorService b = SharedExecutors.getSingleThreadExecutor();
+ assertSame("factories should be same", a, b);
+
+ }
+
+ @Test
+ public void poolThread() {
+ ExecutorService a = SharedExecutors.getPoolThreadExecutor();
+ assertNotNull("ExecutorService must not be null", a);
+ ExecutorService b = SharedExecutors.getPoolThreadExecutor();
+ assertSame("factories should be same", a, b);
+
+ }
+
+ @Test
+ public void timer() {
+ java.util.Timer a = SharedExecutors.getTimer();
+ assertNotNull("Timer must not be null", a);
+ java.util.Timer b = SharedExecutors.getTimer();
+ assertSame("factories should be same", a, b);
+ }
+}