Spring 集成队列通道容量错误

Spring Integration Queue-Channel Capacity wrong

我更多地玩 spring 集成,我非常感兴趣,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>

我也试过 Rendezvous-Queue 效果一样:

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

按我的理解,现在那个频道应该只能一次移动一条消息了。也许 2,如果你认为你有一个额外的容量。我不确定如何阅读它。但是我可以在不消耗的情况下向那个频道发送四次,这对我来说有点奇怪,我不明白容量。

见下文:

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();
    }
}

问题报告者:

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;
    }
}

启动应用程序时,我得到以下信息:

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-Integration 4.2。5.RELEASE。我还尝试了 Spring-Boot 1.2.8 和 Spring-Integration 4.1.9.

这是预期的行为吗???

提前致谢。

看起来你的 channel.send(build, 30000); 是针对 local 变量完成的,而不是共享 bean。 我的测试用例看起来像:

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(和类似)只能通过 @EnableIntegrationMBeanExport@EnableIntegrationManagement 启用。 请参阅参考手册中的 Management

你也可以在框架中找到一些关于这个问题的测试用例,例如QueueChannelTests.