added test case for AMQ-736

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@411733 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/test/java/org/apache/activemq/bugs/SlowConsumerTest.java

@@ -0,0 +1,160 @@
+/**
+ *
+ * Copyright 2005-2006 The Apache Software Foundation
+ *
+ * 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.
+ */
+package org.apache.activemq.bugs;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+
+import javax.jms.Connection;
+import javax.jms.Message;
+import javax.jms.MessageConsumer;
+import javax.jms.MessageProducer;
+import javax.jms.Session;
+import javax.jms.TextMessage;
+
+import junit.framework.TestCase;
+
+import org.apache.activemq.ActiveMQConnectionFactory;
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.command.ActiveMQQueue;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+public class SlowConsumerTest extends TestCase {
+    private static final Log log = LogFactory.getLog(SlowConsumerTest.class);
+    private Socket stompSocket;
+    private ByteArrayOutputStream inputBuffer;
+
+    private static final int MESSAGES_COUNT = 10000;
+    private int messagesCount;
+    protected int messageLogFrequency = 2500;
+    protected long messageReceiveTimeout = 10000L;
+
+    /**
+     * @param args
+     * @throws Exception
+     */
+    public void testRemoveSubscriber() throws Exception {
+        final BrokerService broker = new BrokerService();
+        broker.setPersistent(true);
+        broker.setUseJmx(true);
+
+        broker.addConnector("tcp://localhost:61616").setName("Default");
+        broker.start();
+        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
+        final Connection connection = factory.createConnection();
+        connection.start();
+
+        Thread producingThread = new Thread("Producing thread") {
+            public void run() {
+                try {
+                    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+                    MessageProducer producer = session.createProducer(new ActiveMQQueue(getDestinationName()));
+                    for (int idx = 0; idx < MESSAGES_COUNT; ++idx) {
+                        Message message = session.createTextMessage("" + idx);
+                        producer.send(message);
+                        log.debug("Sending: " + idx);
+                    }
+                    producer.close();
+                    session.close();
+                }
+                catch (Throwable ex) {
+                    ex.printStackTrace();
+                }
+            }
+        };
+        producingThread.setPriority(Thread.MAX_PRIORITY);
+        producingThread.start();
+        Thread.sleep(1000);
+
+        Thread consumingThread = new Thread("Consuming thread") {
+
+            public void run() {
+                try {
+                    Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
+                    MessageConsumer consumer = session.createConsumer(new ActiveMQQueue(getDestinationName()));
+                    int diff = 0;
+                    while (messagesCount != MESSAGES_COUNT) {
+                        Message msg = consumer.receive(messageReceiveTimeout );
+                        if (msg == null) {
+                            log.warn("Got null message at count: " + messagesCount + ". Continuing...");
+                            break;
+                        }
+                        String text = ((TextMessage) msg).getText();
+                        int currentMsgIdx = Integer.parseInt(text);
+                        log.debug("Received: " + text + " messageCount: " + messagesCount);
+                        msg.acknowledge();
+                        if ((messagesCount + diff) != currentMsgIdx) {
+                            log.debug("Message(s) skipped!! Should be message no.: " + messagesCount + " but got: " + currentMsgIdx);
+                            diff = currentMsgIdx - messagesCount;
+                        }
+                        ++messagesCount;
+                        if (messagesCount % messageLogFrequency == 0) {
+                            log.info("Received: " + messagesCount + " messages so far");
+                        }
+                        //Thread.sleep(70);
+                    }
+                }
+                catch (Throwable ex) {
+                    ex.printStackTrace();
+                }
+            }
+        };
+        consumingThread.start();
+        consumingThread.join();
+
+        assertEquals(MESSAGES_COUNT, messagesCount);
+
+    }
+
+    public void sendFrame(String data) throws Exception {
+        byte[] bytes = data.getBytes("UTF-8");
+        OutputStream outputStream = stompSocket.getOutputStream();
+        for (int i = 0; i < bytes.length; i++) {
+            outputStream.write(bytes[i]);
+        }
+        outputStream.flush();
+    }
+
+    public String receiveFrame(long timeOut) throws Exception {
+        stompSocket.setSoTimeout((int) timeOut);
+        InputStream is = stompSocket.getInputStream();
+        int c = 0;
+        for (;;) {
+            c = is.read();
+            if (c < 0) {
+                throw new IOException("socket closed.");
+            }
+            else if (c == 0) {
+                c = is.read();
+                byte[] ba = inputBuffer.toByteArray();
+                inputBuffer.reset();
+                return new String(ba, "UTF-8");
+            }
+            else {
+                inputBuffer.write(c);
+            }
+        }
+    }
+
+    protected String getDestinationName() {
+        return getClass().getName() + "." + getName();
+    }
+}