add spring security and token management

src/main/java/com/iconplus/smartproc/configuration/JwtAuthenticationEntryPoint.java

@@ -0,0 +1,54 @@
+package com.iconplus.smartproc.configuration;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.iconplus.smartproc.exception.ErrorResponse;
+import com.iconplus.smartproc.util.Constants;
+import org.springframework.http.MediaType;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.AuthenticationEntryPoint;
+import org.springframework.stereotype.Component;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+
+@Component
+public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {
+
+	@Override
+	public void commence(HttpServletRequest request, HttpServletResponse response,
+			AuthenticationException authException) throws IOException {
+
+		ErrorResponse errorResponse = new ErrorResponse();
+
+		response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+		response.setContentType(MediaType.APPLICATION_JSON_VALUE);
+
+		var exception = (Exception) request.getAttribute("exception");
+
+		String message;
+
+		if (exception != null) {
+			
+			if (exception.getCause() != null) {
+				message = exception.getCause().toString() + " " + exception.getMessage();
+			} else {
+				message = exception.getMessage();
+			}
+
+			errorResponse.setCode(Constants.ERR_CODE_40051);
+			errorResponse.setTitle(Constants.TITLE_INVALID_NEXT_STEP);
+			errorResponse.setMessage(message);
+			response.getOutputStream()
+					.println(new ObjectMapper().writeValueAsString(errorResponse));
+		} else {
+			errorResponse.setCode(Constants.ERR_CODE_80007);
+			errorResponse.setTitle(Constants.TITLE_INVALID_NEXT_STEP);
+			errorResponse.setMessage("Invalid Access Token");
+			response.getOutputStream()
+					.println(new ObjectMapper().writeValueAsString(errorResponse));
+		}
+	}
+
+}