Spring integration 如何在Spring Integration DSL Tcp中使用消息头进行路由
我有两个服务器端服务,我希望使用消息头将消息路由到它们,远程客户端将服务标识放入字段Spring integration 如何在Spring Integration DSL Tcp中使用消息头进行路由,spring-integration,spring-integration-dsl,spring-integration-ip,Spring Integration,Spring Integration Dsl,Spring Integration Ip,我有两个服务器端服务,我希望使用消息头将消息路由到它们,远程客户端将服务标识放入字段type 来自服务器端配置的代码段是否正确?它抛出强制转换异常,指示route()只查看有效负载,而不查看消息头。此外,Spring集成手册中的所有示例仅显示基于有效载荷的决策 @Bean public IntegrationFlow serverFlow( // common flow for all my services, currently 2 TcpNetServerConnection
type
来自服务器端配置的代码段是否正确?它抛出强制转换异常,指示route()
只查看有效负载,而不查看消息头。此外,Spring集成手册中的所有示例仅显示基于有效载荷的决策
@Bean
public IntegrationFlow serverFlow( // common flow for all my services, currently 2
TcpNetServerConnectionFactory serverConnectionFactory,
HeartbeatServer heartbeatServer,
FeedServer feedServer) {
return IntegrationFlows
.from(Tcp.inboundGateway(serverConnectionFactory))
.<Message<?>, String>route((m) -> m.getHeaders().get("type", String.class),
(routeSpec) -> routeSpec
.subFlowMapping("hearbeat", subflow -> subflow.handle(heartbeatServer::processRequest))
.subFlowMapping("feed", subflow -> subflow.handle(feedServer::consumeFeed)))
.get();
}
和往常一样,这里是完整的演示,并且。没有通过原始TCP发送头的标准方法。您需要以某种方式将它们编码到有效负载中(并在服务器端提取它们) 框架提供了一种机制来为您实现这一点,但它需要额外的配置 看 具体地说
MapJsonSerializer
使用Jackson对象映射器在映射和JSON之间进行转换。您可以将此序列化程序与messageconvertingcpmessageapper
和MapMessageConverter
结合使用,以JSON格式传输选定的头和负载
我将试着找些时间创建一个如何使用它的示例
但是,当然,您可以自己进行编码/解码
编辑
下面是一个使用JSON通过TCP传输消息头的配置示例
@SpringBootApplication
public class TcpWithHeadersApplication {
public static void main(String[] args) {
SpringApplication.run(TcpWithHeadersApplication.class, args);
}
// Client side
public interface TcpExchanger {
public String exchange(String data, @Header("type") String type);
}
@Bean
public IntegrationFlow client(@Value("${tcp.port:1234}") int port) {
return IntegrationFlows.from(TcpExchanger.class)
.handle(Tcp.outboundGateway(Tcp.netClient("localhost", port)
.deserializer(jsonMapping())
.serializer(jsonMapping())
.mapper(mapper())))
.get();
}
// Server side
@Bean
public IntegrationFlow server(@Value("${tcp.port:1234}") int port) {
return IntegrationFlows.from(Tcp.inboundGateway(Tcp.netServer(port)
.deserializer(jsonMapping())
.serializer(jsonMapping())
.mapper(mapper())))
.log(Level.INFO, "exampleLogger", "'Received type header:' + headers['type']")
.route("headers['type']", r -> r
.subFlowMapping("upper",
subFlow -> subFlow.transform(String.class, p -> p.toUpperCase()))
.subFlowMapping("lower",
subFlow -> subFlow.transform(String.class, p -> p.toLowerCase())))
.get();
}
// Common
@Bean
public MessageConvertingTcpMessageMapper mapper() {
MapMessageConverter converter = new MapMessageConverter();
converter.setHeaderNames("type");
return new MessageConvertingTcpMessageMapper(converter);
}
@Bean
public MapJsonSerializer jsonMapping() {
return new MapJsonSerializer();
}
// Console
@Bean
@DependsOn("client")
public ApplicationRunner runner(TcpExchanger exchanger,
ConfigurableApplicationContext context) {
return args -> {
System.out.println("Enter some text; if it starts with a lower case character,\n"
+ "it will be uppercased by the server; otherwise it will be lowercased;\n"
+ "enter 'quit' to end");
Scanner scanner = new Scanner(System.in);
String request = scanner.nextLine();
while (!"quit".equals(request.toLowerCase())) {
if (StringUtils.hasText(request)) {
String result = exchanger.exchange(request,
Character.isLowerCase(request.charAt(0)) ? "upper" : "lower");
System.out.println(result);
}
request = scanner.nextLine();
}
scanner.close();
context.close();
};
}
}
是的,我怀疑无法发送头,很高兴得到确认。我添加了一个如何使用JSON发送头的示例。
@SpringBootApplication
public class TcpWithHeadersApplication {
public static void main(String[] args) {
SpringApplication.run(TcpWithHeadersApplication.class, args);
}
// Client side
public interface TcpExchanger {
public String exchange(String data, @Header("type") String type);
}
@Bean
public IntegrationFlow client(@Value("${tcp.port:1234}") int port) {
return IntegrationFlows.from(TcpExchanger.class)
.handle(Tcp.outboundGateway(Tcp.netClient("localhost", port)
.deserializer(jsonMapping())
.serializer(jsonMapping())
.mapper(mapper())))
.get();
}
// Server side
@Bean
public IntegrationFlow server(@Value("${tcp.port:1234}") int port) {
return IntegrationFlows.from(Tcp.inboundGateway(Tcp.netServer(port)
.deserializer(jsonMapping())
.serializer(jsonMapping())
.mapper(mapper())))
.log(Level.INFO, "exampleLogger", "'Received type header:' + headers['type']")
.route("headers['type']", r -> r
.subFlowMapping("upper",
subFlow -> subFlow.transform(String.class, p -> p.toUpperCase()))
.subFlowMapping("lower",
subFlow -> subFlow.transform(String.class, p -> p.toLowerCase())))
.get();
}
// Common
@Bean
public MessageConvertingTcpMessageMapper mapper() {
MapMessageConverter converter = new MapMessageConverter();
converter.setHeaderNames("type");
return new MessageConvertingTcpMessageMapper(converter);
}
@Bean
public MapJsonSerializer jsonMapping() {
return new MapJsonSerializer();
}
// Console
@Bean
@DependsOn("client")
public ApplicationRunner runner(TcpExchanger exchanger,
ConfigurableApplicationContext context) {
return args -> {
System.out.println("Enter some text; if it starts with a lower case character,\n"
+ "it will be uppercased by the server; otherwise it will be lowercased;\n"
+ "enter 'quit' to end");
Scanner scanner = new Scanner(System.in);
String request = scanner.nextLine();
while (!"quit".equals(request.toLowerCase())) {
if (StringUtils.hasText(request)) {
String result = exchanger.exchange(request,
Character.isLowerCase(request.charAt(0)) ? "upper" : "lower");
System.out.println(result);
}
request = scanner.nextLine();
}
scanner.close();
context.close();
};
}
}