Github user roshannaik commented on a diff in the pull request:
https://github.com/apache/storm/pull/2241#discussion_r158942500
--- Diff:
storm-client/test/jvm/org/apache/storm/utils/JCQueueBackpressureTest.java ---
@@ -0,0 +1,94 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.apache.storm.utils;
+
+import org.apache.storm.policy.WaitStrategyPark;
+import org.apache.storm.utils.JCQueue.Consumer;
+import org.junit.Assert;
+import org.junit.Test;
+import junit.framework.TestCase;
+
+
+public class JCQueueBackpressureTest extends TestCase {
+
+ @Test
+ public void testNoReOrderingUnderBackPressure() throws Exception {
+ final int MESSAGES = 100;
+ final int CAPACITY = 64;
+
+ final JCQueue queue = createQueue("testBackPressure", CAPACITY);
+
+ for (int i = 0; i < MESSAGES; i++) {
+ if (!queue.tryPublish(i)) {
+ Assert.assertTrue(queue.tryPublishToOverflow(i));
+ }
+ }
+
+ TestConsumer consumer = new TestConsumer();
+ queue.consume(consumer);
+ Assert.assertEquals(MESSAGES, consumer.lastMsg);
+
+ }
+
+ private static JCQueue createQueue(String name, int queueSize) {
+ return new JCQueue(name, queueSize, 0, 1, new WaitStrategyPark(0));
+ }
+
+ private static class TestConsumer implements Consumer {
+ int lastMsg = 0;
+
+ @Override
+ public void accept(Object o) {
+ Integer i = (Integer) o;
+ Assert.assertEquals(lastMsg++, i.intValue());
+ System.err.println(i);
+ }
+
+ @Override
+ public void flush() throws InterruptedException
+ { }
+ }
+
+
+ // check that tryPublish() & tryOverflowPublish() work as expected
--- End diff --
thanks. will fix.
---
