From 0cad58cbf2229bb0d8843caf6cf4d0606ab88d79 Mon Sep 17 00:00:00 2001 From: Jim Hahn Date: Fri, 14 Feb 2020 16:29:11 -0500 Subject: 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 Change-Id: I40049ca52defecc4f3f7479470c28da58521866d --- .../policy/common/utils/time/PseudoExecutor.java | 70 ++++++++++++++++++++++ .../common/utils/time/PseudoExecutorTest.java | 60 +++++++++++++++++++ 2 files changed, 130 insertions(+) create mode 100644 utils-test/src/main/java/org/onap/policy/common/utils/time/PseudoExecutor.java create mode 100644 utils-test/src/test/java/org/onap/policy/common/utils/time/PseudoExecutorTest.java 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 00000000..d8b792a8 --- /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 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 00000000..0046f791 --- /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()); + } +} -- cgit 1.2.3-korg