spring boot集成WebSocket日志實時輸出到web頁面
前言
今天來做個有趣的東西,就是實時將系統日志輸出的前端web頁面,因為是實時輸出,所有第一時間就想到瞭使用webSocket,而且在spring boot中,使用websocket超級方便,閱讀本文,你會接觸到以下關鍵詞相關技術,WebSocket(stopmp服務端),stomp協議,sockjs.min.js,stomp.min.js(stomp客戶端),本文使用到的其實就是使用spring boot自帶的webSocket模塊提供stomp的服務端,前端使用stomp.min.js做stomp的客戶端,使用sockjs來鏈接,前端訂閱後端日志端點的消息,後端實時推送,達到日志實時輸出到web頁面的目的,效果如下圖
首先瞭解下stomp
STOMP即Simple (or Streaming) Text Orientated Messaging Protocol,簡單(流)文本定向消息協議,它提供瞭一個可互操作的連接格式,允許STOMP客戶端與任意STOMP消息代理(Broker)進行交互。STOMP協議由於設計簡單,易於開發客戶端,因此在多種語言和多種平臺上得到廣泛地應用。
STOMP協議的前身是TTMP協議(一個簡單的基於文本的協議),專為消息中間件設計。
STOMP是一個非常簡單和容易實現的協議,其設計靈感源自於HTTP的簡單性。盡管STOMP協議在服務器端的實現可能有一定的難度,但客戶端的實現卻很容易。例如,可以使用Telnet登錄到任何的STOMP代理,並與STOMP代理進行交互。
下面是具體的步驟,主要是日志信息的獲取和日志信息的推送,不多說,上代碼
一.引入spring boot websocket依賴
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency>
二.新增日志消息實體
/** * Created by kl on 2017/10/9. * Content :日志消息實體,註意,這裡為瞭減少篇幅,省略瞭get,set代碼 */ public class LoggerMessage{ private String body; private String timestamp; private String threadName; private String className; private String level; public LoggerMessage(String body, String timestamp, String threadName, String className, String level) { this.body = body; this.timestamp = timestamp; this.threadName = threadName; this.className = className; this.level = level; } public LoggerMessage() { } }
三. 創建一個阻塞隊列
作為日志系統輸出的日志的一個臨時載體
public class LoggerQueue { //隊列大小 public static final int QUEUE_MAX_SIZE = 10000; private static LoggerQueue alarmMessageQueue = new LoggerQueue(); //阻塞隊列 private BlockingQueueblockingQueue = new LinkedBlockingQueue<>(QUEUE_MAX_SIZE); private LoggerQueue() { } public static LoggerQueue getInstance() { return alarmMessageQueue; } /** * 消息入隊 * @param log * @return */ public boolean push(LoggerMessage log) { return this.blockingQueue.add(log);//隊列滿瞭就拋出異常,不阻塞 } /** * 消息出隊 * @return */ public LoggerMessage poll() { LoggerMessage result = null; try { result = this.blockingQueue.take(); } catch (InterruptedException e) { e.printStackTrace(); } return result; } }
四.獲取logback的日志,塞入日志隊列中
1.定義Logfilter攔截輸出日志
public class LogFilter extends Filter{ @Override public FilterReply decide(ILoggingEvent event) { LoggerMessage loggerMessage = new LoggerMessage( event.getMessage() , DateFormat.getDateTimeInstance().format(new Date(event.getTimeStamp())), event.getThreadName(), event.getLoggerName(), event.getLevel().levelStr ); LoggerQueue.getInstance().push(loggerMessage); return FilterReply.ACCEPT; } }
2.配置logback.xml,添加我們自定義的filter
<?xml version="1.0" encoding="UTF-8"?> <configuration scan="true"> <include resource="org/springframework/boot/logging/logback/defaults.xml" /> <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}" /> <include resource="org/springframework/boot/logging/logback/file-appender.xml" /> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>${CONSOLE_LOG_PATTERN}</pattern> <charset>utf8</charset> </encoder> <filter class="com.example.websocket.LogFilter"></filter> </appender> <root level="INFO"> <appender-ref ref="FILE" /> <appender-ref ref="CONSOLE" /> </root> </configuration>
五.配置WebSocket消息代理端點,即stomp服務端
@Configuration public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer{ @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint("/websocket") .setAllowedOrigins("http://localhost:8976") .withSockJS(); } }
註意:為瞭連接安全,setAllowedOrigins設置的允許連接的源地址,如果在非這個配置的地址下發起連接會報403,進一步還可以使用addInterceptors設置攔截器,來做相關的鑒權操作
六.啟動類,開啟webSocket消息代理功能,並推送日志信息
@SpringBootApplication @EnableScheduling @EnableWebSocketMessageBroker public class WebsocketApplication { private Logger logger = LoggerFactory.getLogger(WebsocketApplication.class); public static void main(String[] args) { SpringApplication.run(WebsocketApplication.class, args); } @Autowired private SimpMessagingTemplate messagingTemplate; int info=1; @Scheduled(fixedRate = 1000) public void outputLogger(){ logger.info("測試日志輸出"+info++); } /** * 推送日志到/topic/pullLogger */ @PostConstruct public void pushLogger(){ ExecutorService executorService=Executors.newFixedThreadPool(2); Runnable runnable=new Runnable() { @Override public void run() { while (true) { try { LoggerMessage log = LoggerQueue.getInstance().poll(); if(log!=null){ if(messagingTemplate!=null) messagingTemplate.convertAndSend("/topic/pullLogger",log); } } catch (Exception e) { e.printStackTrace(); } } } }; executorService.submit(runnable); executorService.submit(runnable); } }
七.html頁面,連接stomp服務端,訂閱/topic/pullLogger的消息,展示日志信息
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>WebSocket Logger</title> <script src="https://cdn.bootcss.com/jquery/2.1.4/jquery.js"></script> <script src="https://cdn.bootcss.com/sockjs-client/1.1.4/sockjs.min.js"></script> <script src="https://cdn.bootcss.com/stomp.js/2.3.3/stomp.min.js"></script> </head> <body> <button onclick="openSocket()">開啟日志</button><button onclick="closeSocket()">關閉日志</button> <div id="log-container" style="height: 450px; overflow-y: scroll; background: #333; color: #aaa; padding: 10px;"> <div></div> </div> </body> <script> var stompClient = null; $(document).ready(function() {openSocket();}); function openSocket() { if(stompClient==null){ var socket = new SockJS('http://localhost:8084/websocket?token=kl'); stompClient = Stomp.over(socket); stompClient.connect({token:"kl"}, function(frame) { stompClient.subscribe('/topic/pullLogger', function(event) { var content=JSON.parse(event.body); $("#log-container div").append(content.timestamp +" "+ content.level+" --- ["+ content.threadName+"] "+ content.className+" :"+content.body).append("<br/>"); $("#log-container").scrollTop($("#log-container div").height() - $("#log-container").height()); },{ token:"kltoen" }); }); } } function closeSocket() { if (stompClient != null) { stompClient.disconnect(); stompClient=null; } } </script> </body> </html>
參考地址:
stomp.js客戶端:http://jmesnil.net/stomp-websocket/doc/
scok.js客戶端:https://github.com/sockjs/sockjs-client
spring webSocket:https://docs.spring.io/spring/docs/
以上就是spring boot集成WebSocket到web頁面實時輸出的詳細內容,更多關於spring boot集成WebSocket實時輸出到web的資料請關註WalkonNet其它相關文章!
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