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Common config code for developing connectors

There is a newer version: 2.9.8

/*
 * Copyright © 2017 VMware, Inc. All Rights Reserved.
 * SPDX-License-Identifier: BSD-2-Clause
 */

package com.vmware.connectors.common.web;

import static org.springframework.http.HttpStatus.BAD_REQUEST;
import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR;
import static org.springframework.http.HttpStatus.NOT_FOUND;
import static org.springframework.http.HttpStatus.UNAUTHORIZED;
import static org.springframework.http.MediaType.APPLICATION_JSON;

import java.util.Collections;
import java.util.Map;
import java.util.stream.Collectors;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
import org.springframework.http.ResponseEntity.BodyBuilder;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.reactive.function.client.WebClientResponseException;

/**
 * Created by Rob Worsnop on 4/11/17.
 */
@ControllerAdvice
public class ExceptionHandlers {
	private final static Logger logger = LoggerFactory.getLogger(ExceptionHandlers.class);

	private final static String BACKEND_STATUS = "X-Backend-Status";

	// Handles validation exceptions
	@ExceptionHandler(MethodArgumentNotValidException.class)
	@ResponseStatus(BAD_REQUEST)
	@ResponseBody
	public Map> handleValidationException(MethodArgumentNotValidException e) {
		Map errorMap = e.getBindingResult().getFieldErrors().stream()
				.collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
		return Collections.singletonMap("errors", errorMap);
	}

	@ExceptionHandler(UserException.class)
	@ResponseBody
	public ResponseEntity