rabbitmq-InternalExchange

最新推荐文章于 2024-04-25 15:03:28 发布

zhongjay

最新推荐文章于 2024-04-25 15:03:28 发布

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分类专栏： rabbitmq 文章标签：大数据

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本文介绍了一个功能性测试案例，演示了如何在一个交换机到交换机的路由场景中使用内部交换机。测试设置了一个非内部交换机绑定到一个内部交换机，后者再绑定到一个队列。客户端能够向非内部交换机发送消息，但不能直接向内部交换机发送。

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如果一个excahnge被定义成Internal，那么consumer是不能给它发消息的，会报错；

//
// Functional test demonstrating use of an internal exchange in an exchange to
// exchange routing scenario. The routing topology is:
//
//            -------            -------
//          -/       \-        -/       \-
//         /           \      /           \           +-------------+
//         |    e0     +------|     e1    +-----------+    q1       |
//         \           /      \           /           +-------------+
//          -\       /-        -\       /-
//            -------            -------
//                              (internal)
//
// Where a non-internal exchange is bound to an internal exchange, which in
// turn is bound to a queue. A client should be able to publish to e0, but
// not to e1, and publications to e0 should be delivered into q1.
//
public class InternalExchange extends BrokerTestCase
{
    private final String[] queues = new String[] { "q1" };
    private final String[] exchanges = new String[] { "e0", "e1" };

    protected void createResources() throws IOException
    {
        // The queues and exchange we create here are all auto-delete, so we
        // don't need to override releaseResources() with their deletions...
        for (String q : queues)
        {
            channel.queueDeclare(q, false, true, true, null);
        }

        // The second exchange, "e1", will be an 'internal' one.
        for ( String e : exchanges )
        {
            channel.exchangeDeclare(e, "direct",
                                    false, true,
                                    !e.equals("e0"),
                                    null);
        }

        channel.exchangeBind("e1", "e0", "");
        channel.queueBind("q1", "e1", "");
    }

    public void testTryPublishingToInternalExchange()
            throws IOException
    {
        byte[] testDataBody = "test-data".getBytes();

        // We should be able to publish to the non-internal exchange as usual
        // and see our message land in the queue...
        channel.basicPublish("e0", "", null, testDataBody);
        GetResponse r = channel.basicGet("q1", true);
        assertTrue(Arrays.equals(r.getBody(), testDataBody));

// Publishing to the internal exchange will not be allowed...
channel.basicPublish("e1", "", null, testDataBody);

expectError(AMQP.ACCESS_REFUSED);
}
}