241.8. 自定义管道
自定义频道管道通过插入自定义处理程序(s)、Dcoder (s)和解码器(无需以 Netty Endpoint URL 格式)插入自定义处理程序/中断器链,从而提供对用户的完整控制。
要添加自定义管道,必须通过上下文 registry (JNDIRegistry 或 camel-spring ApplicationContextRegistry 等)使用上下文创建并注册自定义频道管道工厂。
自定义管道工厂必须构建如下
-
Producer 链接的频道管道工厂必须扩展抽象类
ClientPipelineFactory
。 -
Consumer 链接的频道管道工厂必须扩展抽象类
ServerInitializerFactory
。 -
类应覆盖 initChannel ()方法,以插入自定义处理程序、编码器和解码器。没有覆盖
initChannel ()
方法会创建一个没有处理程序、编码器或解码器线到管道的管道。
以下示例演示了如何创建 ServerInitializerFactory
241.8.1. 使用自定义管道工厂
public class SampleServerInitializerFactory extends ServerInitializerFactory { private int maxLineSize = 1024; protected void initChannel(Channel ch) throws Exception { ChannelPipeline channelPipeline = ch.pipeline(); channelPipeline.addLast("encoder-SD", new StringEncoder(CharsetUtil.UTF_8)); channelPipeline.addLast("decoder-DELIM", new DelimiterBasedFrameDecoder(maxLineSize, true, Delimiters.lineDelimiter())); channelPipeline.addLast("decoder-SD", new StringDecoder(CharsetUtil.UTF_8)); // here we add the default Camel ServerChannelHandler for the consumer, to allow Camel to route the message etc. channelPipeline.addLast("handler", new ServerChannelHandler(consumer)); } }
然后,自定义频道管道工厂可添加到 registry 中并按照以下方式对 camel 路由进行实例化/使用
Registry registry = camelContext.getRegistry(); ServerInitializerFactory factory = new TestServerInitializerFactory(); registry.bind("spf", factory); context.addRoutes(new RouteBuilder() { public void configure() { String netty_ssl_endpoint = "netty4:tcp://0.0.0.0:5150?serverInitializerFactory=#spf" String return_string = "When You Go Home, Tell Them Of Us And Say," + "For Your Tomorrow, We Gave Our Today."; from(netty_ssl_endpoint) .process(new Processor() { public void process(Exchange exchange) throws Exception { exchange.getOut().setBody(return_string); } } } });