Apply patch from https://issues.apache.org/activemq/browse/AMQ-2002

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@813965 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/test/java/org/apache/activemq/broker/region/cursors/StoreBasedCursorTest.java

@@ -0,0 +1,153 @@
+/**
+ * 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.activemq.broker.region.cursors;
+
+/**
+ * A StoreBasedCursorTest
+ *
+ */
+
+import java.util.Date;
+
+import javax.jms.Connection;
+import javax.jms.ConnectionFactory;
+import javax.jms.DeliveryMode;
+import javax.jms.MessageProducer;
+import javax.jms.Queue;
+import javax.jms.Session;
+import javax.jms.TextMessage;
+
+import org.apache.activemq.ActiveMQConnectionFactory;
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.broker.region.policy.PolicyEntry;
+import org.apache.activemq.broker.region.policy.PolicyMap;
+import org.apache.activemq.usage.SystemUsage;
+
+import junit.framework.TestCase;
+
+public class StoreBasedCursorTest extends TestCase {
+    protected String bindAddress = "tcp://localhost:60706";
+    BrokerService broker;
+    ConnectionFactory factory;
+    Connection connection;
+    Session session;
+    Queue queue;
+    int messageSize = 1024;
+    int memoryLimit = 5 * messageSize;
+    
+    protected void setUp() throws Exception {
+        super.setUp();
+        if (broker == null) {
+            broker = new BrokerService();
+        }
+    }
+
+    protected void tearDown() throws Exception {
+        super.tearDown();
+        if (broker != null) {
+            broker.stop();
+            broker = null;
+        }
+    }
+    
+    protected void start() throws Exception {
+        broker.start();
+        factory = new ActiveMQConnectionFactory("vm://localhost?jms.alwaysSyncSend=true");
+        connection = factory.createConnection();
+        connection.start();
+        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+        queue = session.createQueue("QUEUE." + this.getClass().getName());
+    }
+    
+    protected void stop() throws Exception {
+        session.close();
+        connection.close();
+        broker.stop();
+        broker = null;
+    }
+    
+    protected void configureBroker(long memoryLimit, long systemLimit) throws Exception {
+        broker.setDeleteAllMessagesOnStartup(true);
+        broker.addConnector(bindAddress);
+        broker.setPersistent(true);
+        
+        SystemUsage systemUsage = broker.getSystemUsage();
+        systemUsage.setSendFailIfNoSpace(true);
+        systemUsage.getMemoryUsage().setLimit(systemLimit);
+        
+        PolicyEntry policy = new PolicyEntry();
+        policy.setMemoryLimit(memoryLimit);
+        PolicyMap pMap = new PolicyMap();
+        pMap.setDefaultEntry(policy);
+        broker.setDestinationPolicy(pMap);
+    }
+    
+    protected String createMessageText(int index) {
+        StringBuffer buffer = new StringBuffer(messageSize);
+        buffer.append("Message: " + index + " sent at: " + new Date());
+        if (buffer.length() > messageSize) {
+            return buffer.substring(0, messageSize);
+        }
+        for (int i = buffer.length(); i < messageSize; i++) {
+            buffer.append(' ');
+        }
+        return buffer.toString();
+    }
+    
+    protected void sendMessages(int deliveryMode) throws Exception {
+        start();
+        MessageProducer producer = session.createProducer(queue);
+        producer.setDeliveryMode(deliveryMode);
+        try {
+            for (int i = 0; i < 200; i++) {
+                TextMessage message = session.createTextMessage(createMessageText(i));
+                producer.send(message);
+            }
+        } catch (javax.jms.ResourceAllocationException e) {
+            fail(e.getMessage() + ". percentUsage = " + broker.getSystemUsage().getMemoryUsage().getPercentUsage());
+        }
+        stop();
+    }
+    
+    // use QueueStorePrefetch
+    public void testTwoUsageEqualPersistent() throws Exception {
+        configureBroker(memoryLimit, memoryLimit);
+        sendMessages(DeliveryMode.PERSISTENT);
+    }
+    
+    public void testUseCachePersistent() throws Exception {
+        int limit = memoryLimit / 3;
+        configureBroker(limit, limit);
+        sendMessages(DeliveryMode.PERSISTENT);
+    }
+    
+    public void testMemoryUsageLowPersistent() throws Exception {
+        configureBroker(memoryLimit, 10 * memoryLimit);
+        sendMessages(DeliveryMode.PERSISTENT);
+    }
+    
+    // use FilePendingMessageCursor
+    public void testTwoUsageEqualNonPersistent() throws Exception {
+        configureBroker(memoryLimit, memoryLimit);
+        sendMessages(DeliveryMode.NON_PERSISTENT);
+    }
+    
+    public void testMemoryUsageLowNonPersistent() throws Exception {
+        configureBroker(memoryLimit, 10 * memoryLimit);
+        sendMessages(DeliveryMode.NON_PERSISTENT);
+    }
+}