Question

我使用Wildfly 10.0.0最终独立部署EJB，Hibernate开发了一个Web应用程序。我提到并创建了 MDB ， MessageProducerBean （@ RequestScoped），队列和 ConnectionFactory 。

当我从 MessageProducerBean 发送消息时，我可以在 MDB 中收到消息。

我的问题是我的应用程序可以被许多用户访问。我需要向特定用户发送一些消息（例如：用户-A），并向所有用户发送一些消息。

如果我们使用Queue可以发送给一个客户端，我会阅读一些带有该知识的文章。如果我们使用Topic，我们可以发送给许多客户，但我对此没有任何明确的想法。我的下一个问题是，只有当用户处于活动状态时，此消息才有效

我需要随时发送消息，无论他们是否在线。如果他们在登录后离线，应该显示按摩。任何人都可以帮忙吗？我将在下面总结我的问题。

1）需要用户发送消息和通知。

2）需要将所有消息保持在离线状态。

这是我的代码

独立-full.xml

<subsystem xmlns="urn:jboss:domain:messaging-activemq:1.0">
        <server name="default">
            <security-setting name="#">
                <role name="guest" delete-non-durable-queue="true" create-non-durable-queue="true" consume="true" send="true"/>
            </security-setting>
            <address-setting name="#" message-counter-history-day-limit="10" page-size-bytes="2097152" max-size-bytes="10485760" expiry-address="jms.queue.ExpiryQueue" dead-letter-address="jms.queue.DLQ"/>
            <http-connector name="http-connector" endpoint="http-acceptor" socket-binding="http"/>
            <http-connector name="http-connector-throughput" endpoint="http-acceptor-throughput" socket-binding="http">
                <param name="batch-delay" value="50"/>
            </http-connector>
            <in-vm-connector name="in-vm" server-id="0"/>
            <http-acceptor name="http-acceptor" http-listener="default"/>
            <http-acceptor name="http-acceptor-throughput" http-listener="default">
                <param name="batch-delay" value="50"/>
                <param name="direct-deliver" value="false"/>
            </http-acceptor>
            <in-vm-acceptor name="in-vm" server-id="0"/>
            <jms-queue name="ExpiryQueue" entries="java:/jms/queue/ExpiryQueue"/>
            <jms-queue name="DLQ" entries="java:/jms/queue/DLQ"/>
            <jms-queue name="testQueue" entries="queue/testQueue java:jboss/exported/jms/queue/testQueue"/>
            <connection-factory name="InVmConnectionFactory" entries="java:/ConnectionFactory" connectors="in-vm"/>
            <connection-factory name="RemoteConnectionFactory" entries="java:jboss/exported/jms/RemoteConnectionFactory" connectors="http-connector"/>
            <pooled-connection-factory name="activemq-ra" transaction="xa" entries="java:/JmsXA java:jboss/DefaultJMSConnectionFactory" connectors="in-vm"/>
        </server>
    </subsystem>

MDB

@MessageDriven(mappedName = "queue/testQueue", activationConfig = {
@ActivationConfigProperty(propertyName = "destinationLookup", propertyValue = "queue/testQueue"),
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue"),
@ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge") })
public class MessageDrivenBean implements MessageListener {

private final static Logger LOGGER = Logger.getLogger(MessageDrivenBean.class.toString());

public MessageDrivenBean() {
    System.out.println("TextMDB.ctor, this=" + hashCode());
}

@Override
public void onMessage(Message rcvMessage) {
    TextMessage msg = null;
    try {
        if (rcvMessage instanceof TextMessage) {
            msg = (TextMessage) rcvMessage;
            LOGGER.log(Level.INFO, "Received Message from topic: {0}", msg.getText());
        } else {
            LOGGER.log(Level.WARNING, "Message of wrong type: {0}", rcvMessage.getClass().getName());
        }
    } catch (JMSException e) {
        throw new RuntimeException(e);
    }
}}

MessageProducerBean

@JMSDestinationDefinition(name = "queue/testQueue",
    interfaceName = "javax.jms.Queue",
    destinationName = "queue/testQueue")
@Named("messageProducerBean")
@RequestScopedpublic class MessageProducerBean {

@Inject
private JMSContext context;    
@Resource(mappedName = "queue/testQueue")
private Queue queue;
private final static Logger LOGGER = Logger.getLogger(MessageProducerBean.class.toString());
@Resource(mappedName = "ConnectionFactory")
private ConnectionFactory factory;

private String message;

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public void sendMessage() {
    try {
        String text = "Message from producer: " + message;
        context.createProducer().send(queue, text);

        FacesMessage facesMessage
                = new FacesMessage("Sent message: " + text);
        FacesContext.getCurrentInstance().addMessage(null, facesMessage);
    } catch (Throwable t) {
        LOGGER.log(Level.SEVERE, "SenderBean.sendMessage: Exception: {0}", t.toString());

    }
} }

提前致谢！

Answer 1

最后我找到了办法。我在这里张贴，因为它可能对某人有帮助。

如果我总结了我的所作所为。

首先，我们需要wildfly中的应用程序用户。为此，请转到{wildflyHome} / bin并运行 ./ add-user.sh 。

将用户类型指定为应用程序（选项 b ）。并提供用户名和密码。

供参考：link 1

在上面的链接中，请执行步骤1和步骤2.

将standalone-full.xml修改为

<subsystem xmlns="urn:jboss:domain:messaging-activemq:1.0">
        <server name="default">
            <security-setting name="#">
                <role name="guest" delete-non-durable-queue="true" create-non-durable-queue="true" delete-durable-queue="true" create-durable-queue="true" consume="true" send="true"/>
            </security-setting>
            <address-setting name="#" message-counter-history-day-limit="10" page-size-bytes="2097152" max-size-bytes="10485760" expiry-address="jms.queue.ExpiryQueue" dead-letter-address="jms.queue.DLQ"/>
            <http-connector name="http-connector" endpoint="http-acceptor" socket-binding="http"/>
            <http-connector name="http-connector-throughput" endpoint="http-acceptor-throughput" socket-binding="http">
                <param name="batch-delay" value="50"/>
            </http-connector>
            <in-vm-connector name="in-vm" server-id="0"/>
            <http-acceptor name="http-acceptor" http-listener="default"/>
            <http-acceptor name="http-acceptor-throughput" http-listener="default">
                <param name="batch-delay" value="50"/>
                <param name="direct-deliver" value="false"/>
            </http-acceptor>
            <in-vm-acceptor name="in-vm" server-id="0"/>
            <jms-queue name="ExpiryQueue" entries="java:/jms/queue/ExpiryQueue"/>
            <jms-queue name="DLQ" entries="java:/jms/queue/DLQ"/>
            <jms-queue name="JMSQueue" entries="java:/jboss/exported/jms/queue/JMSQueue jms/queue/JMSQueue"/>
            <jms-topic name="JMSTopic" entries="jms/topic/JMSTopic java:jboss/exported/jms/topic/JMSTopic"/>
            <connection-factory name="InVmConnectionFactory" entries="java:/ConnectionFactory" connectors="in-vm"/>
            <connection-factory name="RemoteConnectionFactory" entries="java:jboss/exported/jms/RemoteConnectionFactory jms/RemoteConnectionFactory" connectors="http-connector"/>
            <connection-factory name="TopicConnectionFactory" entries="java:jboss/exported/jms/TopicConnectionFactory jms/TopicConnectionFactory" connectors="http-connector"/>
            <pooled-connection-factory name="activemq-ra" transaction="xa" entries="java:/JmsXA java:jboss/DefaultJMSConnectionFactory" connectors="in-vm"/>
        </server>
    </subsystem>

在安全设置下的这个子系统中，我们允许删除并创建持久队列。

我的java类用于发送和接收消息，如下所示，

首先将资源注入

@Resource(mappedName = "jms/topic/EMSTopic")
private Topic topic;

@Resource(mappedName = "jms/TopicConnectionFactory")
private TopicConnectionFactory connectionFactory;

消息发送方法如下，

public void send() throws JMSException {
    TopicConnection connection = connectionFactory.createTopicConnection("JMSUser", "jmsuser@123");
    connection.setClientID("userA");
    TopicSession session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
    MessageProducer messageProducer = session.createProducer(topic);
    TextMessage outMessage = session.createTextMessage();
    outMessage.setText("Hi User");
    outMessage.setStringProperty("name", "usera");
    messageProducer.send(outMessage);
    System.out.println("message sent ");
    connection.close();
}

在此方法中，我通过提供应用程序用户名和密码来创建TopicConnection。

对于我设置clientId的连接，对于消息我设置了一个stringProperty，当用户收到消息时，他们只需要接收消息。

我的接收方法如下，

public void recieve() throws JMSException {
    System.out.println("message reday to recieve ");

    String selector = "name = 'usera'";

    try (TopicConnection connection = connectionFactory.createTopicConnection("JMSUser", "jmsuser@123")) {
        connection.setClientID("userA");
        TopicSession session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TopicSubscriber subscriber = session.createDurableSubscriber(topic, "usera", selector, true);
        connection.start();
        TextMessage message = (TextMessage) subscriber.receive(2000);
        if (message != null) {
            System.out.println("printing ==> " + message.getText());
        } else {
            System.out.println("no messages");
        }
        connection.close();
    }
}

在这个方法中，我创建了一个durableTopicConsumer，用于在用户不活动时保留所有消息。

我为每个只收到邮件的用户传递了一个参数值作为选择器。

如果您需要进一步了解，请参阅link 2

希望这会有所帮助。

Answer 2

对于单个消费者，添加标识消费者的消息属性，并让消费者使用消息选择器仅接收其消息。

对于所有消费者而言，最佳解决方案是使用主题并让所有消费者订阅它。如果您了解所有用户，则可以在同一队列中为每个消费者提供单独的消息，但这绝不是最佳做法。

Answer 3

最后我找到了一种方法。我在这里发布是因为它可能对某人有帮助。

如果我总结了自己所做的事情。

首先，我们需要wildfly中的应用程序用户。为此，请转到{wildflyHome} / bin并运行./ add-user.sh 。

将用户类型设为应用程序（选项 b ）。并提供用户名和密码。

供参考：链接1

在上面的链接中，执行步骤1和步骤2。

将standalone-full.xml修改为

<subsystem xmlns="urn:jboss:domain:messaging-activemq:1.0">
        <server name="default">
            <security-setting name="#">
                <role name="guest" delete-non-durable-queue="true" create-non-durable-queue="true" delete-durable-queue="true" create-durable-queue="true" consume="true" send="true"/>
            </security-setting>
            <address-setting name="#" message-counter-history-day-limit="10" page-size-bytes="2097152" max-size-bytes="10485760" expiry-address="jms.queue.ExpiryQueue" dead-letter-address="jms.queue.DLQ"/>
            <http-connector name="http-connector" endpoint="http-acceptor" socket-binding="http"/>
            <http-connector name="http-connector-throughput" endpoint="http-acceptor-throughput" socket-binding="http">
                <param name="batch-delay" value="50"/>
            </http-connector>
            <in-vm-connector name="in-vm" server-id="0"/>
            <http-acceptor name="http-acceptor" http-listener="default"/>
            <http-acceptor name="http-acceptor-throughput" http-listener="default">
                <param name="batch-delay" value="50"/>
                <param name="direct-deliver" value="false"/>
            </http-acceptor>
            <in-vm-acceptor name="in-vm" server-id="0"/>
            <jms-queue name="ExpiryQueue" entries="java:/jms/queue/ExpiryQueue"/>
            <jms-queue name="DLQ" entries="java:/jms/queue/DLQ"/>
            <jms-queue name="JMSQueue" entries="java:/jboss/exported/jms/queue/JMSQueue jms/queue/JMSQueue"/>
            <jms-topic name="JMSTopic" entries="jms/topic/JMSTopic java:jboss/exported/jms/topic/JMSTopic"/>
            <connection-factory name="InVmConnectionFactory" entries="java:/ConnectionFactory" connectors="in-vm"/>
            <connection-factory name="RemoteConnectionFactory" entries="java:jboss/exported/jms/RemoteConnectionFactory jms/RemoteConnectionFactory" connectors="http-connector"/>
            <connection-factory name="TopicConnectionFactory" entries="java:jboss/exported/jms/TopicConnectionFactory jms/TopicConnectionFactory" connectors="http-connector"/>
            <pooled-connection-factory name="activemq-ra" transaction="xa" entries="java:/JmsXA java:jboss/DefaultJMSConnectionFactory" connectors="in-vm"/>
        </server>
    </subsystem>

在安全设置下的该子系统中，我们允许删除并创建持久队列。

我的java类用于发送和接收消息，如下所示，

首先将资源注入为

@Resource(mappedName = "jms/topic/EMSTopic")
private Topic topic;

@Resource(mappedName = "jms/TopicConnectionFactory")
private TopicConnectionFactory connectionFactory;
Message send method as follow ,

public void send() throws JMSException {
    TopicConnection connection = connectionFactory.createTopicConnection("JMSUser", "jmsuser@123");
    connection.setClientID("userA");
    TopicSession session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
    MessageProducer messageProducer = session.createProducer(topic);
    TextMessage outMessage = session.createTextMessage();
    outMessage.setText("Hi User");
    outMessage.setStringProperty("name", "usera");
    messageProducer.send(outMessage);
    System.out.println("message sent ");
    connection.close();
}

在这种方法中，我通过提供应用程序用户名和密码来创建TopicConnection。

对于连接，我设置了clientId，对于消息，我设置了stringProperty，以便用户在收到消息时仅需要接收消息。

我的接收方法如下，

public void recieve() throws JMSException {
    System.out.println("message reday to recieve ");

    String selector = "name = 'usera'";

    try (TopicConnection connection = connectionFactory.createTopicConnection("JMSUser", "jmsuser@123")) {
        connection.setClientID("userA");
        TopicSession session = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TopicSubscriber subscriber = session.createDurableSubscriber(topic, "usera", selector, true);
        connection.start();
        TextMessage message = (TextMessage) subscriber.receive(2000);
        if (message != null) {
            System.out.println("printing ==> " + message.getText());
        } else {
            System.out.println("no messages");
        }
        connection.close();
    }
}

在这种方法中，我创建了一个耐用的主题消费者，以在用户不活动时也保留所有消息。

我为每个仅收到消息的用户传递了一个参数值作为选择器。

如果您需要有关此链接的进一步知识，请参阅链接2

希望这会有所帮助。

如何使用JMS和MDB向特定用户和所有用户发送消息和通知？

3 个答案: