Question

这是我的骆驼路线的一部分

<bean class="io.netty.handler.codec.string.StringEncoder" id="stringEncoder">
    <constructor-arg value="UTF-8"/>
</bean>

<camelContext xmlns="http://camel.apache.org/schema/spring" id="camelContext">

    <route>
        <from uri="direct:startMessageSend"/>
        <to uri="netty4:udp://localhost:5000?encoder=#stringEncoder&amp;sync=false"/>
    </route>
</camelContext>

当我将一个简单的字符串发送到此端点时。

            String udpMsgBody = "hello world!";
            template.sendBody(udpMsgBody);

我得到以下例外。

Caused by: java.lang.UnsupportedOperationException: unsupported message type: DefaultAddressedEnvelope (expected: DatagramPacket, AddressedEnvelope<ByteBuf, SocketAddress>, ByteBuf)
at io.netty.channel.socket.nio.NioDatagramChannel.filterOutboundMessage(NioDatagramChannel.java:324)
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(AbstractChannel.java:697)
at io.netty.channel.DefaultChannelPipeline$HeadContext.write(DefaultChannelPipeline.java:1114)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:705)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:763)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:698)
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:102)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:705)
at io.netty.channel.AbstractChannelHandlerContext.access$1900(AbstractChannelHandlerContext.java:32)
at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.write(AbstractChannelHandlerContext.java:980)
at io.netty.channel.AbstractChannelHandlerContext$WriteAndFlushTask.write(AbstractChannelHandlerContext.java:1032)
at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.run(AbstractChannelHandlerContext.java:965)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:357)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
at java.lang.Thread.run(Thread.java:744)

但是，当我将Exchange主体作为byteBuf发送时，我没有异常，并且通过UDP发送消息。

            ByteBuf bbuffer = Unpooled.copiedBuffer(udpMsgBody.getBytes());
            template.sendBody(udpMsgBody);

我的问题是即使我使用正确的StringEncoder，为什么我不能通过netty4发送字符串？

注意我使用的是camel 2.15.2

通过UDP发送String时使用Camel netty4“不支持的消息类型”异常

0 个答案: