Add PseudoExecutor to utils-test
Moved MyExec from actors package to policy-common/utils-test,
renaming it to PseudoExecutor.
Updated per review comment(s):
- declare "task" of type "Queue" instead of "LinkedList"
Issue-ID: POLICY-2363
Signed-off-by: Jim Hahn <jrh3@att.com>
Change-Id: I40049ca52defecc4f3f7479470c28da58521866d
diff --git a/utils-test/src/main/java/org/onap/policy/common/utils/time/PseudoExecutor.java b/utils-test/src/main/java/org/onap/policy/common/utils/time/PseudoExecutor.java
new file mode 100644
index 0000000..d8b792a
--- /dev/null
+++ b/utils-test/src/main/java/org/onap/policy/common/utils/time/PseudoExecutor.java
@@ -0,0 +1,70 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.utils.time;
+
+import java.util.LinkedList;
+import java.util.Queue;
+import java.util.concurrent.Executor;
+import lombok.Getter;
+
+/**
+ * Executor that will run tasks until the queue is empty or a maximum number of tasks have
+ * been executed. Doesn't actually run anything until {@link #runAll()} is invoked.
+ */
+public class PseudoExecutor implements Executor {
+
+ /**
+ * Tasks to be run.
+ */
+ @Getter
+ private final Queue<Runnable> tasks = new LinkedList<>();
+
+
+ /**
+ * Gets the queue length.
+ *
+ * @return the queue length
+ */
+ public int getQueueLength() {
+ return tasks.size();
+ }
+
+ @Override
+ public void execute(Runnable command) {
+ tasks.add(command);
+ }
+
+ /**
+ * Runs all tasks until the queue is empty or the maximum number of tasks have been
+ * reached.
+ *
+ * @param maxTasks maximum number of tasks to run
+ * @return {@code true} if the queue is empty, {@code false} if the maximum number of
+ * tasks have been reached before the queue was emptied
+ */
+ public boolean runAll(int maxTasks) {
+ for (int count = 0; count < maxTasks && !tasks.isEmpty(); ++count) {
+ tasks.remove().run();
+ }
+
+ return tasks.isEmpty();
+ }
+}
diff --git a/utils-test/src/test/java/org/onap/policy/common/utils/time/PseudoExecutorTest.java b/utils-test/src/test/java/org/onap/policy/common/utils/time/PseudoExecutorTest.java
new file mode 100644
index 0000000..0046f79
--- /dev/null
+++ b/utils-test/src/test/java/org/onap/policy/common/utils/time/PseudoExecutorTest.java
@@ -0,0 +1,60 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.utils.time;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Before;
+import org.junit.Test;
+
+public class PseudoExecutorTest {
+ private int invoked;
+ private PseudoExecutor executor;
+
+ @Before
+ public void setUp() {
+ invoked = 0;
+ executor = new PseudoExecutor();
+ }
+
+ @Test
+ public void test() {
+ assertEquals(0, executor.getQueueLength());
+ assertEquals(0, executor.getTasks().size());
+ assertTrue(executor.runAll(0));
+
+ executor.execute(() -> invoked++);
+ executor.execute(() -> invoked++);
+ executor.execute(() -> invoked++);
+ assertEquals(3, executor.getTasks().size());
+ assertEquals(3, executor.getQueueLength());
+
+ assertFalse(executor.runAll(2));
+ assertEquals(2, invoked);
+ assertEquals(1, executor.getQueueLength());
+
+ assertTrue(executor.runAll(2));
+ assertEquals(3, invoked);
+ assertEquals(0, executor.getQueueLength());
+ }
+}