我想配置消息驱动的通道适配器,以便在以下情况下获取"拒绝连接"错误:1) 消息代理关闭或2)指定了错误的代理URL
我试着用下面的代码做这件事,但没有奏效:
<int:channel id="invalidChannel" />
<int-mqtt:message-driven-channel-adapter
id="myAdapter"
client-id="${inbound.client.id}"
url="${host.url}"
topics="${inbound.topic}"
channel="incomingChannel"
error-channel="errorChannel"
client-factory="clientFactory" />
<int:exception-type-router input-channel="errorChannel">
<int:mapping exception-type="java.net.ConnectException" channel="invalidChannel" />
</int:exception-type-router>
<int:service-activator id="ErrorActivator"
input-channel="invalidChannel"
ref="errorListener"
method="processError" />
<bean id="errorListener" class="com.ErrorListener" />
processError()方法定义如下:
public void processError(Message<MessageHandlingException> message)
{
System.out.println("an error / exception occured");
}
我正在尝试获取异常,在连接异常的情况下,记录如下:
Unable to connect to server (32103) - java.net.ConnectException: Connection refused: connect
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:79)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:590)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:70)
... 2 more
有人能帮忙吗?
问候
Connection refused
错误不是消息流的一部分,因此它不由errorChannel
处理。M-M-M。。。只是因为它是在任何Message
出现之前引起的。
更新
从Spring Integration 4.2.2
开始,MqttConnectionFailedEvent
可用于这些情况。
请参阅参考手册中的更多信息:http://docs.spring.io/spring-integration/reference/html/mqtt.html