add socket taskrunner

spring-boot-websocket/src/main/java/com/lance/websocket/config/SockTaskRunner.java

@@ -0,0 +1,26 @@
+package com.lance.websocket.config;
+
+import java.io.IOException;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Iterator;
+
+import org.apache.commons.lang3.time.DateUtils;
+
+public class SockTaskRunner implements Runnable{
+	public void run() {
+		Iterator<SocketSessionInfo> it = SocketSessionHandler.sessions.iterator();
+		while(it.hasNext()) {
+			SocketSessionInfo info = it.next();
+
+			if(DateUtils.truncatedCompareTo(new Date(), info.getEndSessionTime(), Calendar.MINUTE) > 0) {
+				try {
+					info.getWebSocketSession().close();
+					SocketSessionHandler.newInstance().removeSession(info.getSessionId());
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+}