December 2019
Beginner to intermediate
330 pages
10h 7m
Chinese
Content preview from RxJava反应式编程
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将反应式编程应用于已有应用程序
｜
111
connection.close();
} catch (Exception e) {
log.error("Can't close", e);
}
});
}
JMS API
提供了两种从代理（
broker
）接收消息的方式：一种是通过阻塞的 receive() 方
法以同步的方式接收，另一种是通过 MessageListener 进行非阻塞接收。非阻塞的
API
有
很多优点，比如占用的资源（如线程和栈内存）更少。同时，它与
Rx
编程风格更加一致。
在这里，不再创建
MessageListener
实例并从它的内部调用订阅者，而是采用方法引用实
现更简洁的语法。
consumer.setMessageListener(subscriber::onNext)
同时，还要清理资源和处理异常。这个很小的转换层能够让我们很便利地消费
JMS
消息，
而不必担心
API
的内部细节。如下是使用流行的
ActiveMQ
消息代理的样例，该代理在本
地运行。
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.command.ActiveMQTopic;
ConnectionFactory connectionFactory =
new ActiveMQConnectionFactory("tcp://localhost:61616");
Observable<String> ...
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