我試圖創建一個Tcp服務器,它接受入站連接,並異步向連接的客戶端發送消息。 有一個Tcp服務器的示例,但它使用網關,它是請求/響應,不支持異步。與Spring集成框架的Tcp連接
我的目標,
- 服務器聽插座,例如9000
- 一個tcp客戶端連接到9000
- 服務器接受連接和接收消息。 (使用
TcpReceivingChannelAdapter
?) - 服務器保持連接/套接字並記下ip_connectId標頭。
- 當某個事件或計劃任務爲客戶端產生消息時,它查找ip_connectId並向該客戶端發送消息。 (使用
TcpSendingMessageHandler
?)
從參考文檔中,我應該使用協作出站和入站通道適配器。但沒有java配置示例。我不明白如何用java配置來做到這一點,尤其是如何以及在哪裏尋找客戶端發送。
我需要兩個通道嗎?一個用於入站,一個用於出站? inboundAdapter-> fromTcpChannel->消費 生產者 - > outboundAdapter-> toTcpChannel
做我創建ServiceActivator
或端點充當生產者/消費者? 默認彈簧集成是否保持連接活着?並且當我需要發送消息給它時,只需將ip_connectId頭添加到消息中? 我是否使用TcpSendingMessageHandler
將消息發送給客戶端,還是需要實施gateway
?
清理我的代碼並在Gary的幫助後再次測試,這是我的代碼。
@EnableIntegration
@IntegrationComponentScan
@Configuration
public class IntegrationConfig implements
ApplicationListener<TcpConnectionEvent> {
@Value("${listen.port:8000}")
private int port;
@Bean //for accepting text message from TCP, putty
public MessageChannel fromTcp() {
return new DirectChannel();
}
@Bean //for sending text message to TCP client, outbound
public MessageChannel toTcp() {
return new DirectChannel();
}
// receive from MVC controller
@Bean
public MessageChannel invokeChannel() {
return new DirectChannel();
}
@Bean //inbound, it is working, I could read the inbound message while debugging
public TcpReceivingChannelAdapter in(
AbstractServerConnectionFactory connectionFactory) {
TcpReceivingChannelAdapter adapter = new TcpReceivingChannelAdapter();
adapter.setOutputChannel(fromTcp());
adapter.setConnectionFactory(connectionFactory);
return adapter;
}
//transform TCP bytes to string message, working
@Transformer(inputChannel = "fromTcp", outputChannel = "toCollaborate")
public String convert(byte[] bytes) {
return new String(bytes);
}
MessageHeaders staticheader; //save ip_connectinId, use this to collaborate outbound message later, for testing purpose only
@ServiceActivator(inputChannel = "toCollaborate", outputChannel = "toTcp")
public Message<String> handleTcpMessage(Message<String> stringMsg) {
staticheader = stringMsg.getHeaders();
return stringMsg;
// save the header, collaborate to output channel
}
//collaborate message from REST API invokeChannel to a outbound tcp client, this fail
@Transformer(inputChannel = "invokeChannel", outputChannel = "toTcp")
public Message<String> headerBeforeSend(String test) {
GenericMessage<String> msg = new GenericMessage<String>(
"from rest api");
if (staticheader != null) {
MessageBuilder
.fromMessage(msg)
.setHeader("ip_connectionId",
staticheader.get("ip_connectionId")).build();
}
return msg;
}
@ServiceActivator(inputChannel = "toTcp")
@Bean
public TcpSendingMessageHandler out(
AbstractServerConnectionFactory connectionFactory) {
TcpSendingMessageHandler tcpOutboundAdp = new TcpSendingMessageHandler();
tcpOutboundAdp.setConnectionFactory(connectionFactory);
return tcpOutboundAdp;
}
// should need only 1 factory? and keep connectin alive
// server for in coming connection
@Bean
public AbstractServerConnectionFactory serverCF() {
return new TcpNetServerConnectionFactory(this.port);
}
@Override
public void onApplicationEvent(TcpConnectionEvent tcpEvent) {
// TODO Auto-generated method stub
TcpConnection source = (TcpConnection) tcpEvent.getSource();
}
}
//The MVC controller
@Autowired
MessageChannel invokeChannel;
@RequestMapping(value="/invoke")
public String sayHello()
{
//trigger gateway to send a message
String msg = "hello";
MessagingTemplate template = new MessagingTemplate();
template.send(invokeChannel, new GenericMessage<String>(msg));
return msg;
}
測試結果: 1.油灰連接確定,發送文本消息 2. SI接收消息確定 3.使用REST API localhost/webappname/rest/invoke
將消息發送到invokeChannel,OK 4. transformer
組消息頭 5.異常作爲遵循
例外org.springframework.web.util.NestedServletException:請求失敗 處理;嵌套的例外是 org.springframework.messaging.MessageHandlingException:無法找到 出境插座 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:981) org.springframework.web.servlet.FrameworkServlet.doGet( FrameworkServlet.java:860) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) javax.servlet.http.HttpServlet 。服務(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
另請參見參考手冊中的'@ Configuration'樣本:http://docs.spring.io /spring-integration/reference/html/ip.html#ip-annotation –
加里,我還是不完全明白。 當我創建'TcpSendingMessageHandler' bean時,我應該爲其參數分配一個'AbstractServerConnectionFactory'對象嗎? 當有消息輸出到'toClientChannel'通道時,如何在out()中獲取這個消息對象? 如何通過此'out()'處理程序中的TCP發送消息? –
如何從'newRequest()'返回一個頻道?我的頻道是在「Endpoint」類的外部定義的。 @EnableIntegration @IntegrationComponentScan @Configuration 公共類IntegrationConfig { @MessageEndpoint \t公共靜態類RelayService { @Bean 公共TcpReceivingChannelAdapter()的(){ ... adapter.setOutputChannel(newRequests() ); } } } –