/* 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.catalina.valves;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import jakarta.servlet.ServletException;
import org.junit.Assert;
import org.junit.Test;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.tomcat.unittest.TesterRequest;
import org.apache.tomcat.unittest.TesterResponse;
public class TestPersistentValve {
@Test
public void testSemaphore() throws Exception {
// Create the test objects
PersistentValve pv = new PersistentValve();
Request request = new TesterRequest();
Response response = new TesterResponse();
TesterValve testerValve = new TesterValve();
// Configure the test objects
request.setRequestedSessionId("1234");
// Plumb the test objects together
pv.setContainer(request.getContext());
pv.setNext(testerValve);
// Call the necessary lifecycle methods
pv.init();
// Run the test
Thread[] threads = new Thread[5];
for (int i = 0; i < threads.length; i++) {
threads[i] = new Thread(() -> {
try {
pv.invoke(request, response);
} catch (IOException | ServletException e) {
throw new RuntimeException(e);
}
});
}
for (int i = 0; i < threads.length; i++) {
threads[i].start();
}
for (int i = 0; i < threads.length; i++) {
threads[i].join();
}
Assert.assertEquals(1, testerValve.getMaximumConcurrency());
}
private static class TesterValve extends ValveBase {
private static AtomicInteger maximumConcurrency = new AtomicInteger();
private static AtomicInteger concurrency = new AtomicInteger();
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {
int c = concurrency.incrementAndGet();
maximumConcurrency.getAndUpdate((v) -> c > v ? c : v);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// Ignore
}
concurrency.decrementAndGet();
}
public int getMaximumConcurrency() {
return maximumConcurrency.get();
}
}
}