@@ -0,0 +1,2490 @@
+/*%0A * Licensed to the Apache Software Foundation (ASF) under one%0A * or more contributor license agreements.  See the NOTICE file%0A * distributed with this work for additional information%0A * regarding copyright ownership.  The ASF licenses this file%0A * to you under the Apache License, Version 2.0 (the%0A * %22License%22); you may not use this file except in compliance%0A * with the License.  You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A*/%0A%0Apackage org.apache.kylin.rest.util;%0A%0Aimport java.util.concurrent.CountDownLatch;%0Aimport java.util.concurrent.atomic.AtomicInteger;%0A%0Aimport org.junit.Assert;%0Aimport org.junit.Test;%0A%0Apublic class RequestUtilTest %7B%0A%0A    @Test%0A    public void testOpenAndCloseQueryRequest() %7B%0A        int nThread = 5;%0A%0A        final Integer maxConcurrentQuery = 2;%0A        final String project = %22test%22;%0A%0A        final AtomicInteger nQueryFailed = new AtomicInteger(0);%0A%0A        Thread%5B%5D threads = new Thread%5BnThread%5D;%0A        final CountDownLatch lock = new CountDownLatch(nThread);%0A        for (int i = 0; i %3C nThread; i++) %7B%0A            final int j = i;%0A            threads%5Bj%5D = new Thread(new Runnable() %7B%0A                @Override%0A                public void run() %7B%0A                    try %7B%0A                        boolean ifOpen = RequestUtil.openQueryRequest(project, maxConcurrentQuery);%0A                        lock.countDown();%0A                        if (ifOpen) %7B%0A                            lock.await();%0A                            RequestUtil.closeQueryRequest(project);%0A                        %7D else %7B%0A                            nQueryFailed.incrementAndGet();%0A                        %7D%0A                    %7D catch (InterruptedException e) %7B%0A                    %7D%0A                %7D%0A            %7D);%0A            threads%5Bj%5D.start();%0A        %7D%0A        for (int i = 0; i %3C nThread; i++) %7B%0A            try %7B%0A                threads%5Bi%5D.join();%0A            %7D catch (InterruptedException e) %7B%0A            %7D%0A        %7D%0A        Assert.assertEquals(new Integer(0), RequestUtil.getCurrentRunningQuery(project));%0A        Assert.assertEquals(nThread - maxConcurrentQuery, nQueryFailed.get());%0A    %7D%0A%7D%0A

add unit test