我是 HornetQ 的新手，所以请多多包涵。让我先告诉你我的要求：
我需要一个消息队列中间件，它可以在具有低延迟和持久性的不同进程之间传递大约 1k 大小的消息（即它应该能够在系统崩溃中幸存）。我将有多个进程写入同一个队列，并且类似地多个进程从同一个队列中读取。
为此，我选择了 HornetQ，因为它在持久性消息传递方面的评分最高。
我目前正在使用Hornetq v2.2.2Final作为独立服务器。
我能够使用核心 api (ClientSession)成功创建持久/非持久队列，并成功将消息发布到队列(ClientProducer)。
同样，我可以使用 core api (ClientConsumer)从队列中读取消息。
之后问题就来了，当客户端读取消息时，消息仍然保留在队列中，即队列中的消息数量保持不变。也许我弄错了，但我的印象是，一旦消息被消费 (read + ack)，它就会从队列中删除。但这在我的情况下没有发生，并且一遍又一遍地读取相同的消息再次。
另外，我想告诉大家，我已经尝试过将非持久队列与非持久消息一起使用。但问题依然存在。
我正在使用的生产者代码：
public class HQProducer implements Runnable {
private ClientProducer producer;
private boolean killme;
private ClientSession session;
private boolean durableMsg;
public HQProducer(String host, int port, String address, String queueName,
boolean deleteQ, boolean durable, boolean durableMsg, int pRate) {
this.durableMsg = durableMsg;
try {
HashMap map = new HashMap();
map.put("host", host);
map.put("port", port);
TransportConfiguration config = new TransportConfiguration(NettyConnectorFactory.class.getName(), map);
ServerLocator locator = HornetQClient.createServerLocatorWithoutHA(config);
ClientSessionFactory factory = locator.createSessionFactory();
session = factory.createSession();
if (queueExists(queueName)) {
if (deleteQ) {
System.out.println("Deleting existing queue :: " + queueName);
session.deleteQueue(queueName);
System.out.println("Creating queue :: " + queueName);
session.createQueue(address, queueName, true);
}
} else {
System.out.println("Creating new queue :: " + queueName);
session.createQueue(address, queueName, durable);
}
producer = session.createProducer(SimpleString.toSimpleString(address), pRate);
killme = false;
} catch (Exception ex) {
Logger.getLogger(HQTestProducer.class.getName()).log(Level.SEVERE, null, ex);
}
}
@Override
public void run() {
long time = System.currentTimeMillis();
int cnt = 0;
long timediff;
while (!killme) {
try {
ClientMessage message = session.createMessage(durableMsg);
message.getBodyBuffer().writeString("Hello world");
producer.send(message);
cnt++;
timediff = ((System.currentTimeMillis() - time) / 1000);
if (timediff >= 1) {
System.out.println("Producer tps :: " + cnt);
cnt = 0;
time = System.currentTimeMillis();
}
} catch (HornetQException ex) {
Logger.getLogger(HQProducer.class.getName()).log(Level.SEVERE, null, ex);
}
}
try {
session.close();
} catch (HornetQException ex) {
Logger.getLogger(HQProducer.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void setKillMe(boolean killme) {
this.killme = killme;
}
private boolean queueExists(String qname) {
boolean res = false;
try {
//ClientSession.BindingQuery bq = session.bindingQuery(SimpleString.toSimpleString(qname));
QueueQuery queueQuery = session.queueQuery(SimpleString.toSimpleString(qname));
if (queueQuery.isExists()) {
res = true;
}
} catch (HornetQException ex) {
res = false;
}
return res;
}
}
消费者的代码也是：
public class HQConsumer implements Runnable {
private ClientSession session;
private ClientConsumer consumer;
private boolean killMe;
public HQConsumer(String host, int port, String queueName, boolean browseOnly) {
try {
HashMap map = new HashMap();
map.put("host", host);
map.put("port", port);
TransportConfiguration config = new TransportConfiguration(NettyConnectorFactory.class.getName(), map);
ServerLocator locator = HornetQClient.createServerLocatorWithoutHA(config);
ClientSessionFactory factory = locator.createSessionFactory();
session = factory.createSession();
session.start();
consumer = session.createConsumer(queueName, "",0,-1,browseOnly);
killMe = false;
} catch (Exception ex) {
Logger.getLogger(HQTestProducer.class.getName()).log(Level.SEVERE, null, ex);
}
}
@Override
public void run() {
long time = System.currentTimeMillis();
int cnt = 0;
long timediff;
while (!killMe) {
try {
ClientMessage msgReceived = consumer.receive();
msgReceived.acknowledge();
//System.out.println("message = " + msgReceived.getBodyBuffer().readString());
cnt++;
timediff = ((System.currentTimeMillis() - time) / 1000);
if (timediff >= 1) {
System.out.println("ConSumer tps :: " + cnt);
cnt = 0;
time = System.currentTimeMillis();
}
} catch (HornetQException ex) {
Logger.getLogger(HQConsumer.class.getName()).log(Level.SEVERE, null, ex);
}
}
try {
session.close();
} catch (HornetQException ex) {
Logger.getLogger(HQConsumer.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void setKillMe(boolean killMe) {
this.killMe = killMe;
}
}
HornetQ 服务器配置 ::
<configuration xmlns="urn:hornetq"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:hornetq /schema/hornetq-configuration.xsd">
<paging-directory>${data.dir:../data}/paging</paging-directory>
<bindings-directory>${data.dir:../data}/bindings</bindings-directory>
<journal-directory>${data.dir:../data}/journal</journal-directory>
<journal-min-files>10</journal-min-files>
<large-messages-directory>${data.dir:../data}/large-messages</large-messages-directory>
<connectors>
<connector name="netty">
<factory-class>org.hornetq.core.remoting.impl.netty.NettyConnectorFactory</factory-class>
<param key="host" value="${hornetq.remoting.netty.host:localhost}"/>
<param key="port" value="${hornetq.remoting.netty.port:5445}"/>
</connector>
<connector name="netty-throughput">
<factory-class>org.hornetq.core.remoting.impl.netty.NettyConnectorFactory</factory-class>
<param key="host" value="${hornetq.remoting.netty.host:localhost}"/>
<param key="port" value="${hornetq.remoting.netty.batch.port:5455}"/>
<param key="batch-delay" value="50"/>
</connector>
</connectors>
<acceptors>
<acceptor name="netty">
<factory-class>org.hornetq.core.remoting.impl.netty.NettyAcceptorFactory</factory-class>
<param key="host" value="${hornetq.remoting.netty.host:localhost}"/>
<param key="port" value="${hornetq.remoting.netty.port:5445}"/>
</acceptor>
<acceptor name="netty-throughput">
<factory-class>org.hornetq.core.remoting.impl.netty.NettyAcceptorFactory</factory-class>
<param key="host" value="${hornetq.remoting.netty.host:localhost}"/>
<param key="port" value="${hornetq.remoting.netty.batch.port:5455}"/>
<param key="batch-delay" value="50"/>
<param key="direct-deliver" value="false"/>
</acceptor>
</acceptors>
<security-settings>
<security-setting match="#">
<permission type="createNonDurableQueue" roles="guest"/>
<permission type="deleteNonDurableQueue" roles="guest"/>
<permission type="createDurableQueue" roles="guest"/>
<permission type="deleteDurableQueue" roles="guest"/>
<permission type="consume" roles="guest"/>
<permission type="send" roles="guest"/>
</security-setting>
</security-settings>
<address-settings>
<!--default for catch all-->
<address-setting match="#">
<dead-letter-address>jms.queue.DLQ</dead-letter-address>
<expiry-address>jms.queue.ExpiryQueue</expiry-address>
<redelivery-delay>0</redelivery-delay>
<max-size-bytes>10485760</max-size-bytes>
<message-counter-history-day-limit>10</message-counter-history-day-limit>
<address-full-policy>BLOCK</address-full-policy>
</address-setting>
</address-settings>
</configuration>