提问者:小点点

Spring集成队列-通道容量不对


我玩更多的Spring整合,我很感兴趣,但我认为有一个奇怪的行为,我找不到答案。

我有一个使用Queue-Channel的简单应用程序:

<int:channel id="ticketChannel" datatype="ch.elca.prototype.model.Ticket">
    <int:queue capacity="1"/>
</int:channel>

我还尝试了具有相同效果的Rendezvous Queue:

<int:channel id="ticketChannel" datatype="ch.elca.prototype.model.Ticket">
    <int:rendezvous-queue/>
</int:channel>

以我的理解,现在在那个通道中一次只能移动一条消息。如果你认为你有一个额外的容量,也许是2个。我不知道如何阅读它。但是我可以在不消耗的情况下向那个通道发送四次,这对我来说有点奇怪,那时我不明白容量。

见以下内容:

主要应用:在这里,我流式传输10张票,并为每张票调用openTicket:

public static void main(final String[] args) throws InterruptedException {
    try (ConfigurableApplicationContext context = SpringApplication.run(SassSimulatorApplication2.class, args)) {
        final TicketGenerator generator = context.getBean(TicketGenerator.class);
        final ProblemReporter reporter = context.getBean(ProblemReporter.class);
        generator.createTickets().limit(10).forEach(reporter::openTicket);
        context.close();
    }
}

问题记者:

public class ProblemReporter {
    private volatile QueueChannel channel;

    public synchronized void openTicket(final Ticket ticket){
        final Message<Ticket> build = TicketMessageBuilder.buildMessage(ticket);
        boolean send = channel.send(build);

        System.out.println("send: " + send);
        System.out.println("getQueueSize: " + channel.getQueueSize());
        System.out.println("getSendCount: " + channel.getSendCount());
        System.out.println("getReceiveCount: " + channel.getReceiveCount());
        System.out.println("getSendErrorCount: " + channel.getSendErrorCount());
        System.out.println("getRemainingCapacity: " + channel.getRemainingCapacity());
    }

    @Value("#{ticketChannel}")
    public void setChannel(final QueueChannel channel) {
        this.channel = channel;
    }
}

开始应用程序时,我得到以下内容:

send: true
getQueueSize: 0
getSendCount: 0
getReceiveCount: 0
getSendErrorCount: 0
getRemainingCapacity: 1

send: true
getQueueSize: 0
getSendCount: 0
getReceiveCount: 0
getSendErrorCount: 0
getRemainingCapacity: 1

send: true
getQueueSize: 1
getSendCount: 0
getReceiveCount: 0
getSendErrorCount: 0
getRemainingCapacity: 0

send: true
getQueueSize: 1
getSendCount: 0
getReceiveCount: 0
getSendErrorCount: 0
getRemainingCapacity: 0

我正在使用Spring-Boot 1.3.3、Sprint-Integration4.2.5。释放。我还尝试了使用Spring-Integration4.1.9的Spring-Boot 1.2.8。

这是预期的行为吗???

提前感谢。


共1个答案

匿名用户

看起来像你的channel. send(build,30000);是针对本地变量完成的,而不是共享的bean。我的测试用例如下所示:

QueueChannel channel = new QueueChannel(3);

IntStream.range(0, 4)
        .forEach(i -> {
            boolean send = channel.send(new GenericMessage<>("test-" + i), 100);
            System.out.println("send: " + send);
            System.out.println("getQueueSize: " + channel.getQueueSize());
            System.out.println("getRemainingCapacity: " + channel.getRemainingCapacity());
        });

结果是:

send: true
getQueueSize: 1
getRemainingCapacity: 2
send: true
getQueueSize: 2
getRemainingCapacity: 1
send: true
getQueueSize: 3
getRemainingCapacity: 0
send: false
getQueueSize: 3
getRemainingCapacity: 0

注意:sendCount(及类似)只能通过@EnableIntegrationMBean导出@EnableIntegrationManagement启用。请参阅参考手册中的管理。

您还可以在框架中找到一些关于该问题的测试用例,例如QueueChannelTest