init

test/org/apache/catalina/connector/TestMaxConnections.java

@@ -0,0 +1,162 @@
+/*
+ *  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.connector;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.junit.Assert;
+import org.junit.Assume;
+import org.junit.Test;
+
+import org.apache.catalina.core.StandardContext;
+import org.apache.catalina.startup.SimpleHttpClient;
+import org.apache.catalina.startup.Tomcat;
+import org.apache.catalina.startup.TomcatBaseTest;
+
+public class TestMaxConnections extends TomcatBaseTest {
+    private static final int MAX_CONNECTIONS = 3;
+    public static final int soTimeout = 5000;
+    public static final int connectTimeout = 1000;
+
+    @Test
+    public void testConnector() throws Exception {
+        init();
+        Assume.assumeFalse("This feature is not available for NIO2 (BZ58103)",
+                getTomcatInstance().getConnector().getProtocolHandlerClassName().contains("Nio2"));
+        ConnectThread[] t = new ConnectThread[10];
+        for (int i=0; i<t.length; i++) {
+            t[i] = new ConnectThread();
+            t[i].setName("ConnectThread["+i+"]");
+        }
+        for (int i=0; i<t.length; i++) {
+            t[i].start();
+            Thread.sleep(50);
+        }
+        for (int i=0; i<t.length; i++) {
+            t[i].join();
+        }
+
+        Assert.assertEquals(MAX_CONNECTIONS, SimpleServlet.getMaxConnections());
+    }
+
+    private class ConnectThread extends Thread {
+        @Override
+        public void run() {
+            try {
+                TestClient client = new TestClient();
+                client.doHttp10Request();
+            } catch (Exception x) {
+                // NO-OP. Some connections are expected to fail.
+            }
+        }
+    }
+
+
+    private synchronized void init() throws Exception {
+        Tomcat tomcat = getTomcatInstance();
+        StandardContext root = (StandardContext) tomcat.addContext("", SimpleHttpClient.TEMP_DIR);
+        root.setUnloadDelay(soTimeout);
+        Tomcat.addServlet(root, "Simple", new SimpleServlet());
+        root.addServletMappingDecoded("/test", "Simple");
+        Assert.assertTrue(tomcat.getConnector().setProperty("maxKeepAliveRequests", "1"));
+        Assert.assertTrue(tomcat.getConnector().setProperty("maxThreads", "10"));
+        Assert.assertTrue(tomcat.getConnector().setProperty("connectionTimeout", "20000"));
+        Assert.assertTrue(tomcat.getConnector().setProperty("keepAliveTimeout", "50000"));
+        Assert.assertTrue(tomcat.getConnector().setProperty("maxConnections", Integer.toString(MAX_CONNECTIONS)));
+        Assert.assertTrue(tomcat.getConnector().setProperty("acceptCount", "1"));
+        tomcat.start();
+    }
+
+    private class TestClient extends SimpleHttpClient {
+
+        private void doHttp10Request() throws Exception {
+            setPort(getPort());
+
+            long start = System.currentTimeMillis();
+            // Open connection
+            connect(connectTimeout,soTimeout);
+
+            // Send request in two parts
+            String[] request = new String[1];
+            request[0] =
+                "GET /test HTTP/1.0" + CRLF + CRLF;
+            setRequest(request);
+            boolean passed = false;
+            processRequest(false); // blocks until response has been read
+            long stop = System.currentTimeMillis();
+            log.info(Thread.currentThread().getName()+" Request complete:"+(stop-start)+" ms.");
+            passed = (this.readLine()==null);
+            // Close the connection
+            disconnect();
+            reset();
+            Assert.assertTrue(passed);
+        }
+
+        @Override
+        public boolean isResponseBodyOK() {
+            return true;
+        }
+    }
+
+
+    private static class SimpleServlet extends HttpServlet {
+
+        private static final long serialVersionUID = 1L;
+
+        private static int currentConnections = 0;
+        private static int maxConnections = 0;
+
+        @Override
+        protected void service(HttpServletRequest req, HttpServletResponse resp)
+                throws ServletException, IOException {
+
+            increment();
+
+            System.out.println("Processing thread: " + Thread.currentThread().getName());
+            try {
+                Thread.sleep(TestMaxConnections.soTimeout*4/5);
+            } catch (InterruptedException x) {
+
+            }
+            resp.setContentLength(0);
+            resp.flushBuffer();
+
+            decrement();
+        }
+
+        private static synchronized void increment() {
+            currentConnections++;
+            if (currentConnections > maxConnections) {
+                maxConnections = currentConnections;
+            }
+        }
+
+        private static synchronized void decrement() {
+            currentConnections--;
+        }
+
+
+        public static synchronized int getMaxConnections() {
+            return maxConnections;
+        }
+    }
+}