[Calling Third-party API - OpenFeign] 3 Feign Call Case

Feign is a Java to HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket. Feign's first goal was reducing the complexity of binding Denominator uniformly to HTTP APIs regardless of ReSTfulness...

Posted by Mr.Vincent on 2021-02-03
Estimated Reading Time 26 Minutes
Words 4.8k In Total
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上文博主已经举例并总结了 Feign 的大部分用法。那么接下来,博主结合实际真正开发中的情况,简单模拟了一个案例。需求大致如下:A 公司需要对接并获取 B 公司的用户信息和部门信息。在这里可以把 A 公司看做是调用方,B 公司是被调用方。或者说 A 公司是客户端,B 公司是服务端。那么直接上代码。

Server

Commons

ResponseDto

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/**
* @param <T>
* @author vincent
* 返回前端数据封装
*/
public class ResponseDto<T> implements Serializable {
private int status;
private String msg;
private T data;

private ResponseDto() {
}

private ResponseDto(int status) {
this.status = status;
}

private ResponseDto(int status, T data) {
this.status = status;
this.data = data;
}

private ResponseDto(int status, String msg, T data) {
this.status = status;
this.msg = msg;
this.data = data;
}

private ResponseDto(int status, String msg) {
this.status = status;
this.msg = msg;
}

private ResponseDto(ResultCode responseCode, T data) {
this(responseCode, null, data);
}

private ResponseDto(ResultCode responseCode, String detailMsg, T data) {
this.status = responseCode.getCode();
this.msg = Optional.ofNullable(detailMsg)
.map(deMsg -> String.format("%s : %s", responseCode.getDesc(), deMsg))
.orElse(responseCode.getDesc());
this.data = data;
}

@JsonIgnore
public boolean isSuccess() {
return this.status == ResultCode.SUCCESS.getCode();
}

public int getStatus() {
return status;
}

public String getMsg() {
return msg;
}

public T getData() {
return data;
}

public static <T> ResponseDto<T> success() {
return success(null);
}

public static <T> ResponseDto<T> success(T data) {
return new ResponseDto<>(ResultCode.SUCCESS, data);
}

public static <T> ResponseDto<T> success(String msg, T data) {
return new ResponseDto<>(ResultCode.SUCCESS, msg, data);
}

public static <T> ResponseDto<T> error() {
return error(ResultCode.ERROR, null);
}

public static <T> ResponseDto<T> error(String errorMsg) {
return new ResponseDto<>(ResultCode.ERROR, errorMsg, null);
}

public static <T> ResponseDto<T> error(ResultCode responseCode) {
return error(responseCode, null, null);
}

public static <T> ResponseDto<T> error(ResultCode responseCode, String errorMsg) {
return error(responseCode, errorMsg, null);
}

public static <T> ResponseDto<T> error(ResultCode responseCode, String errorMsg, T data) {
return new ResponseDto<>(responseCode, errorMsg, data);
}

public static <T> ResponseDto<T> exception(String exceptionMsg) {
return new ResponseDto<>(ResultCode.EXCEPTION, exceptionMsg, null);
}
}

ResultCode

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/**
* @author vincent
*/
public interface ResultCode {
/**
* 获取 code
*
* @return int
*/
int getCode();

/**
* 获取 desc
*
* @return String
*/
String getDesc();

BaseResultCode SUCCESS = BaseResultCode.SUCCESS;
BaseResultCode ERROR = BaseResultCode.ERROR;
BaseResultCode EXCEPTION = BaseResultCode.EXCEPTION;
}

BaseResultCode

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/**
* @author vincent
* 返回状态的枚举
*/
public enum BaseResultCode implements ResultCode {
/**
* SUCCESS: 0
* ERROR: 1
* Exception: -1
*/
SUCCESS(0, "SUCCESS"),
ERROR(1, "ERROR"),
EXCEPTION(-1, "Exception");

private final int code;
private final String desc;

BaseResultCode(int code, String desc) {
this.code = code;
this.desc = desc;
}

@Override
public int getCode() {
return code;
}

@Override
public String getDesc() {
return desc;
}
}

config

AccessTokenFilter

这里简单的写了一个 Filter 过滤器,用于对 Token 进行校验。

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/**
* @author vincent
* 一个简单的校验 token 的过滤器
*/
@Component
@WebFilter(filterName = "AccessTokenFilter", urlPatterns = "/*")
@Order(value = 1)
@Slf4j
public class AccessTokenFilter implements Filter {
private static final List<String> NOT_ALLOWED_PATHS = ImmutableList.of("/autho/user/get", "/autho/department/list");

public static final Map<String, List<String>> TOKEN_MAP = new ConcurrentHashMap<>(2);

private static final String KEY = "token";

/**
* 假设 token 有效时间为 3 分钟
*/
public static final Long EXPIRES_IN = 3 * 60 * 1000L;

@Override
public void init(FilterConfig filterConfig) {
System.out.println();
log.info("AccessTokenFilter init...");
// 初始化 token
getTokenMap();
}

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
String path = request.getRequestURI().substring(request.getContextPath().length());
if (NOT_ALLOWED_PATHS.contains(path)) {
System.out.println();
log.info("AccessTokenFilter doFilter...");
log.info("AccessTokenFilter check Token start !!!!!!");
String accessToken = request.getParameter("accessToken");
if (StringUtils.isEmpty(accessToken)) {
log.warn("Parameter accessToken is empty...");
TpCallCaseUtils.writeJson("Parameter accessToken is empty...", response);
return;
}
log.info("Parameter accessToken is [{}]...", accessToken);

List<String> tokenList = TOKEN_MAP.get(KEY);
if (MapUtils.isNotEmpty(TOKEN_MAP) && TOKEN_MAP.containsKey(KEY)) {
long expiresTime = Long.parseLong(tokenList.get(0));
long currentTimeMillis = System.currentTimeMillis();
if (expiresTime < currentTimeMillis) {
log.warn("Access Token has expired...");
TOKEN_MAP.clear();
log.info("Clear access Token...");
getTokenMap();
TpCallCaseUtils.writeJson("Access Token has expired...", response);
return;
}
}

if (!StringUtils.equals(tokenList.get(1), accessToken)) {
log.warn("Access Token is error...");
TpCallCaseUtils.writeJson("Access Token is error...", response);
return;
}
log.info("AccessTokenFilter check Token end !!!!!!\n");
}
filterChain.doFilter(servletRequest, servletResponse);
}

@Override
public void destroy() {
log.info("AccessTokenFilter destroy...");
}

/**
* 生成 token
*/
private void getTokenMap() {
long currentTimeMillis = System.currentTimeMillis();
long expiresTime = currentTimeMillis + EXPIRES_IN;
String token = UUID.randomUUID().toString() + "_" + Base64.getEncoder().encodeToString("token".getBytes(StandardCharsets.UTF_8));
List<String> linkedList = Lists.newLinkedList();
linkedList.add(String.valueOf(expiresTime));
linkedList.add(token);
TOKEN_MAP.put(KEY, linkedList);
log.info("Generate access Token: [{}], Expires Time: [{}] ...\n", token, TpCallCaseUtils.millisConvertToDate(expiresTime));
}
}

Utils

TpCallCaseUtils

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/**
* @author vincent
*/
public class TpCallCaseUtils {

/**
* 返回错误信息
*
* @param errorMsg 错误信息
* @param response HttpServletResponse
*/
public static void writeJson(String errorMsg, HttpServletResponse response) {
try {
String json = new ObjectMapper().writeValueAsString(ResponseDto.error(ResultCodeErrorEnum.TOKEN_ERROR, errorMsg));
response.setCharacterEncoding(StandardCharsets.UTF_8.name());
response.setContentType(MediaType.APPLICATION_JSON_VALUE);
PrintWriter writer = response.getWriter();
writer.print(json);
writer.flush();
} catch (IOException e) {
throw new RuntimeException(e);
}
}

/**
* 毫秒值转时间
*
* @param currentTimeMillis 毫秒值
* @return 时间格式(yyyy-MM-dd HH:mm:ss.SSS)
*/
public static String millisConvertToDate(Long currentTimeMillis) {
Instant instant = Instant.ofEpochMilli(currentTimeMillis);
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneId.SHORT_IDS.get("CTT")));
return localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS"));
}
}

Enum

ResultCodeErrorEnum

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/**
* @author vincent
*/
public enum ResultCodeErrorEnum implements ResultCode {
/**
* 业务类型错误枚举
*/
AUTH_TYPE_ERROR(18900, "权限校验类型错误"),
AUTH_ERROR(18901, "权限校验错误"),
TOKEN_ERROR(18902, "Token 校验错误"),
;

private final int code;
private final String desc;

ResultCodeErrorEnum(int code, String desc) {
this.code = code;
this.desc = desc;
}

@Override
public int getCode() {
return code;
}

@Override
public String getDesc() {
return desc;
}
}

Dto

AuthServerDto

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/**
* @author vincent
*/
@NoArgsConstructor
@Data
public class AuthServerDto {
/**
* access_token : 2e63f6f5-c546-427e-8a1c-f4db48671bf8
* token_type : bearer
* expires_in : 7199
*/
@JsonProperty("access_token")
private String accessToken;
@JsonProperty("token_type")
private String tokenType;
@JsonProperty("expires_in")
private Integer expiresIn;
}

TpUserDto

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/**
* @author vincent
*/
@Data
public class TpUserDto {
private String userId;
private String userCode;
private String userName;
}

TpDepartmentQueryDto

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/**
* @author vincent
*/
@Data
public class TpDepartmentQueryDto {
private Long idOrParentId;
private String position;
}

TpDepartmentDto

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/**
* @author vincent
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class TpDepartmentDto {
private Long id;
/**
* 部门名称
*/
private String name;

/**
* 英文名称
*/
@JsonProperty("name_en")
private String nameEn;

/**
* 父亲部门id。根部门为1
*/
@JsonProperty("parent_Id")
private Long parentId;

/**
* 职位
*/
private String position;

/**
* 在父部门中的次序值。order值大的排序靠前。值范围是[0, 2^32)
*/
private Long order;
}

Controller

AuthServerController

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/**
* @author vincent
*/
@RestController
@RequestMapping(value = "/autho")
@Slf4j
public class AuthServerController {
private static final String GRANT_TYPE = "client_credentials";
private static final String CLIENT_ID = "client_id";
private static final String CLIENT_SECRET = "client_secret";

private static final String TOKEN = "token";

@RequestMapping(value = "/token", method = RequestMethod.GET)
public ResponseDto<AuthServerDto> getAccessToken(@RequestParam("grant_type") String grantType,
@RequestParam("client_id") String clientId,
@RequestParam("client_secret") String clientSecret) {
log.info("GetAccessToken method request parameters -> grant_type: {}, client_id: {},client_secret: {} ...", grantType, clientId, clientSecret);
if (!StringUtils.equals(grantType, GRANT_TYPE)) {
return ResponseDto.error(ResultCodeErrorEnum.AUTH_TYPE_ERROR);
}
if (!StringUtils.equals(clientId, CLIENT_ID) && !StringUtils.equals(clientSecret, CLIENT_SECRET)) {
return ResponseDto.error(ResultCodeErrorEnum.AUTH_ERROR);
}
// 获取 token, 并重置 token 的过期时间
List<String> tokenList = AccessTokenFilter.TOKEN_MAP.get(TOKEN);
String oldExpiresTime = tokenList.get(0);
String token = tokenList.get(1);
tokenList.remove(0);
Long newExpiresTime = System.currentTimeMillis() + AccessTokenFilter.EXPIRES_IN;
tokenList.add(0, String.valueOf(newExpiresTime));
log.info("Update Expires Time: Old Expires Time {}, New Expires Time {} ...", TpCallCaseUtils.millisConvertToDate(Long.parseLong(oldExpiresTime)), TpCallCaseUtils.millisConvertToDate(newExpiresTime));

AuthServerDto authDto = new AuthServerDto();
authDto.setAccessToken(token);
authDto.setTokenType("bearer");
authDto.setExpiresIn(3 * 60 * 1000);
return ResponseDto.success(authDto);
}

@GetMapping(value = "/user/get")
public ResponseDto<TpUserDto> getUserDto(@RequestParam("accessToken") String accessToken, @RequestParam("userId") String userId) {
log.info("GetUserDto method request parameters -> accessToken: [{}], userId: [{}] ...", accessToken, userId);
TpUserDto userDto = new TpUserDto();
userDto.setUserId(userId);
userDto.setUserCode("USERCODE_VINCENT");
userDto.setUserName("Vincent");
return ResponseDto.success(userDto);
}

@PostMapping(value = "/department/list")
public ResponseDto<List<TpDepartmentDto>> getDepartmentDtos(@RequestParam("accessToken") String accessToken, @RequestBody TpDepartmentQueryDto queryDto) {
log.info("GetDepartmentDtos method request parameters -> accessToken: [{}], queryDto: [{}] ...", accessToken, queryDto);
return ResponseDto.success(Lists.newArrayList(
new TpDepartmentDto(19000L, "xxx公司", "xxx_company", 1L, queryDto.getPosition(), 1L),
new TpDepartmentDto(19580L, "人事部", "personnel_department", 19000L, queryDto.getPosition(), 23L),
new TpDepartmentDto(19581L, "财务部", "finance_department", 19000L, queryDto.getPosition(), 24L),
new TpDepartmentDto(19582L, "技术部", "technology_department", 19000L, queryDto.getPosition(), 25L)
));
}
}

Client

Utils

DefaultFeignClient

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/**
* @author vincent
* openfeign 默认构造器
*/
@Slf4j
public class DefaultFeignClient {
private final static Map<ContractEnum, Contract> CONTRACT_MAP = ImmutableMap.of(
ContractEnum.DEFAULT, new Contract.Default(),
ContractEnum.SPRINGMVC, new SpringMvcContract()
);

private final static SSLSocketFactory SSL_SOCKET_FACTORY;

private final static Map<String, Object> FEIGN_CLIENT_CACHE = new HashMap<>();

static {
try {
SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, (chain, authType) -> true).build();
SSL_SOCKET_FACTORY = sslContext.getSocketFactory();
} catch (Exception e) {
log.error("Init SSLSocketFactory fail...");
throw new RuntimeException(e);
}
}

/**
* Feign 构造器
*
* @param apiType 请求目标类
* @param url 请求路径
* @param contractEnum 定义接口上有效的注释 {@link Contract}, 默认 feign 自带注解 {@link Contract.Default}, 也可使用 {@link SpringMvcContract} 注解
* @param requestInterceptor 请求拦截器 {@link RequestInterceptor}(在请求前做一些特殊需求处理,需自己实现 {@link RequestInterceptor#apply(RequestTemplate)} 接口方法)
* @param options 请求可选设置 {@link Request.Options}, 默认设置 {@link Request.Options#Options()}, 自定义设置 {@link Request.Options#Options(long, TimeUnit, long, TimeUnit, boolean)}
* @param retryer 请求重试设置 {@link Retryer}, 默认设置 {@link Retryer.Default#Default()}, 自定义设置 {@link Retryer.Default#Default(long, long, int)}
* @param errorDecoder 请求返回值解码器 {@link ErrorDecoder}, 默认设置 {@link ErrorDecoder.Default#decode(String, Response)},
* 当 HTTP {@link Response} 的 {@link Response#status()} 值不在 2xx 范围内时,可自定义实现 {@link ErrorDecoder.Default#decode(String, Response)} 接口方法)
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 实例
*/
private static <T> T createClient(Class<T> apiType, String url, ContractEnum contractEnum,
Consumer<RequestTemplate> requestInterceptor, Options options,
Retryer retryer, BiFunction<String, Response, Exception> errorDecoder) {
return Feign.builder()
.logger(new Slf4jLogger())
.logLevel(Logger.Level.FULL)
.requestInterceptor(requestInterceptor::accept)
.contract(CONTRACT_MAP.get(contractEnum))
.client(new Client.Default(SSL_SOCKET_FACTORY, NoopHostnameVerifier.INSTANCE))
.options(options)
.retryer(retryer)
.encoder(DefaultFeignClient::encode)
.decoder(DefaultFeignClient::decode)
.errorDecoder(errorDecoder::apply)
.target(apiType, url);
}

/**
* 创建 DefaultFeignClient 单例
*
* @param apiType 请求目标类
* @param url 请求路径
* @param contractEnum 定义接口上有效的注释 {@link Contract}, 默认 feign 自带注解 {@link Contract.Default}, 也可使用 {@link SpringMvcContract} 注解
* @param requestInterceptor 请求拦截器 {@link RequestInterceptor}(在请求前做一些特殊需求处理,需自己实现 {@link RequestInterceptor#apply(RequestTemplate)} 接口方法)
* @param options 请求可选设置 {@link Request.Options}, 默认设置 {@link Request.Options#Options()}, 自定义设置 {@link Request.Options#Options(long, TimeUnit, long, TimeUnit, boolean)}
* @param retryer 请求重试设置 {@link Retryer}, 默认设置 {@link Retryer.Default#Default()}, 自定义设置 {@link Retryer.Default#Default(long, long, int)}
* @param errorDecoder 请求返回值解码器 {@link ErrorDecoder}, 默认设置 {@link ErrorDecoder.Default#decode(String, Response)},
* 当 HTTP {@link Response} 的 {@link Response#status()} 值不在 2xx 范围内时,可自定义实现 {@link ErrorDecoder.Default#decode(String, Response)} 接口方法)
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 单例
*/
public static <T> T getSingleClient(Class<T> apiType, String url, ContractEnum contractEnum,
Consumer<RequestTemplate> requestInterceptor, Options options,
Retryer retryer, BiFunction<String, Response, Exception> errorDecoder) {
T singletonClient = CheckedCast.cast(FEIGN_CLIENT_CACHE.get(apiType.getName()));
if (Objects.isNull(singletonClient)) {
synchronized (FEIGN_CLIENT_CACHE) {
singletonClient = CheckedCast.cast(FEIGN_CLIENT_CACHE.get(apiType.getName()));
if (Objects.isNull(singletonClient)) {
singletonClient = createClient(apiType, url, contractEnum, requestInterceptor, options, retryer, errorDecoder);
FEIGN_CLIENT_CACHE.put(apiType.getName(), singletonClient);
}
}
}
return singletonClient;
}

/**
* 创建 DefaultFeignClient 单例
*
* @param apiType 请求目标类
* @param url 请求路径
* @param contractEnum 定义接口上有效的注释 {@link Contract}, 默认 feign 自带注解 {@link Contract.Default}, 也可使用 {@link SpringMvcContract} 注解
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 单例
*/
public static <T> T getSingleClient(Class<T> apiType, String url, ContractEnum contractEnum) {
return getSingleClient(apiType, url, contractEnum, requestTemplate -> {
}, new Options(), new Retryer.Default(), (methodKey, response) -> new ErrorDecoder.Default().decode(methodKey, response));
}

/**
* 创建 DefaultFeignClient 单例, 默认使用 springmvc 注解
*
* @param apiType 请求目标类
* @param url 请求路径
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 单例
*/
public static <T> T getSingleClient(Class<T> apiType, String url) {
return getSingleClient(apiType, url, ContractEnum.SPRINGMVC);
}

/**
* 创建 DefaultFeignClient 实例
*
* @param apiType 请求目标类
* @param url 请求路径
* @param contractEnum 定义接口上有效的注释 {@link Contract}, 默认 feign 自带注解 {@link Contract.Default}, 也可使用 {@link SpringMvcContract} 注解
* @param requestInterceptor 请求拦截器 {@link RequestInterceptor}(在请求前做一些特殊需求处理,需自己实现 {@link RequestInterceptor#apply(RequestTemplate)} 接口方法)
* @param options 请求可选设置 {@link Request.Options}, 默认设置 {@link Request.Options#Options()}, 自定义设置 {@link Request.Options#Options(long, TimeUnit, long, TimeUnit, boolean)}
* @param retryer 请求重试设置 {@link Retryer}, 默认设置 {@link Retryer.Default#Default()}, 自定义设置 {@link Retryer.Default#Default(long, long, int)}
* @param errorDecoder 请求返回值解码器 {@link ErrorDecoder}, 默认设置 {@link ErrorDecoder.Default#decode(String, Response)},
* 当 HTTP {@link Response} 的 {@link Response#status()} 值不在 2xx 范围内时,可自定义实现 {@link ErrorDecoder.Default#decode(String, Response)} 接口方法)
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 实例
*/
public static <T> T getClient(Class<T> apiType, String url, ContractEnum contractEnum,
Consumer<RequestTemplate> requestInterceptor, Options options,
Retryer retryer, BiFunction<String, Response, Exception> errorDecoder) {
return createClient(apiType, url, contractEnum, requestInterceptor, options, retryer, errorDecoder);
}

/**
* 创建 DefaultFeignClient 实例
*
* @param apiType 请求目标类
* @param url 请求路径
* @param contractEnum 定义接口上有效的注释 {@link Contract}, 默认 feign 自带注解 {@link Contract.Default}, 也可使用 {@link SpringMvcContract} 注解
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 实例
*/
public static <T> T getClient(Class<T> apiType, String url, ContractEnum contractEnum) {
return getClient(apiType, url, contractEnum, requestTemplate -> {
}, new Options(), new Retryer.Default(), (methodKey, response) -> new ErrorDecoder.Default().decode(methodKey, response));
}

/**
* 创建 DefaultFeignClient 实例, 默认使用 springmvc 注解
*
* @param apiType 请求目标类
* @param url 请求路径
* @param <T> 请求目标类泛型
* @return 返回 DefaultFeignClient 实例
*/
public static <T> T getClient(Class<T> apiType, String url) {
return getClient(apiType, url, ContractEnum.SPRINGMVC);
}

/**
* 发送请求时的编码器
*
* @param object 请求体中的内容(body 中的内容)
* @param bodyType 请求体的类型
* @param template 请求模板
* @throws EncodeException 编码失败时异常
*/
private static void encode(Object object, Type bodyType, RequestTemplate template) throws EncodeException {
if (StringUtils.equalsIgnoreCase(template.method(), HttpMethod.GET.name()) || Objects.isNull(object)) {
return;
}
new SpringFormEncoder(new SpringEncoder(HttpMessageConverters::new)).encode(object, bodyType, template);
}

/**
* 请求响应后进行解密处理
*
* @param response 请求响应
* @param type 接口方法定义的返回类型
* @return 返回 object(就是 type 的类型)
* @throws IOException IO 异常
* @throws FeignException Feign 异常
*/
private static Object decode(Response response, Type type) throws IOException, FeignException {
if (type == InputStream.class) {
return response.body().asInputStream();
}
return new JacksonDecoder().decode(response, type);
}
}

CheckedCast

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/**
* @author vincent
* 强制类型转换
*/
public class CheckedCast {
@SuppressWarnings("unchecked")
public static <T> T cast(Object obj) {
return (T) obj;
}
}

ContractEnum

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/**
* @author vincent
* feign 创建实例时, 与之配套使用的注解(这里暂时只支持 feign 本身默认的注解和 springmvc 的注解)
*/
public enum ContractEnum {
DEFAULT("feign_default"),
SPRINGMVC("springmvc");

private final String value;

ContractEnum(String value) {
this.value = value;
}

public String getValue() {
return value;
}
}

Dto

TpConfigDto

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/**
* @author vincent
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class TpConfigDto {
private String clientId;
private String clientSecret;
private String hostName;
}

Dao

TpConfigDao

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/**
* @author vincent
*/
@Repository
public class TpConfigDao {
/**
* 从数据库查询出 TpConfigDto 对象
*
* @param clientId 标识唯一
* @return TpConfigDto
*/
public TpConfigDto selectByClientId(String clientId) {
// 当然这里你可以创建一个 TpConfigMapper, 通过 mybatis 来查询出 TpConfigDto, 并交给 spring 容器来管理(这里只是 demo 所以就简单模拟下)
return new TpConfigDto(clientId, "client_secret", "http://localhost:8080/autho");
}
}

Feign

TpApi

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/**
* @author vincent
*/
public interface TpApi {
@RequestMapping(value = "/token", method = RequestMethod.GET)
ResponseDto<AuthServerDto> getAccessToken(@RequestParam("grant_type") String grantType, @RequestParam("client_id") String clientId, @RequestParam("client_secret") String clientSecret);

@GetMapping(value = "/user/get")
ResponseDto<TpUserDto> getUserDto(@RequestParam("accessToken") String accessToken, @RequestParam("userId") String userId);

@PostMapping(value = "/department/list")
ResponseDto<List<TpDepartmentDto>> getDepartmentDtos(@RequestParam("accessToken") String accessToken, @RequestBody TpDepartmentQueryDto queryDto);
}

TpFeignClient

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/**
* @author vincent
* 可自定义一些别的需求
*/
public class TpFeignClient extends DefaultFeignClient {
}

Helper

TpApiHelper

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/**
* @author vincent
*/
public interface TpApiHelper {

TpUserDto getUserDto(String userId);

List<TpDepartmentDto> getDepartmentDtos(TpDepartmentQueryDto queryDto);
}

TpApiHelperImpl

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/**
* @author vincent
*/
@Slf4j
public class TpApiHelperImpl implements TpApiHelper {
private final TpApi tpApi;
private final TpConfigDto tpConfigDto;
private static volatile TpApiHelperImpl instance;
private final LoadingCache<String, String> loadingCache;
private static final Lock reentrantLock = new ReentrantLock();
private static final String GRANT_TYPE = "client_credentials";

public static TpApiHelperImpl getInstance(TpConfigDto tpConfigDto) {
if (instance == null) {
reentrantLock.lock();
try {
if (instance == null) {
instance = new TpApiHelperImpl(tpConfigDto);
}
} finally {
reentrantLock.unlock();
}
}
return instance;
}

private TpApiHelperImpl(TpConfigDto tpConfigDto) {
Objects.requireNonNull(tpConfigDto);
this.tpConfigDto = tpConfigDto;
tpApi = TpFeignClient.getClient(TpApi.class, tpConfigDto.getHostName());
loadingCache = CacheBuilder
.newBuilder()
.maximumSize(1)
.expireAfterWrite(178, TimeUnit.SECONDS)
.expireAfterAccess(180, TimeUnit.SECONDS)
.removalListener((RemovalListener<String, String>) notification -> log.info("[ Token: {} ] is removed...", notification.getValue()))
.build(new CacheLoader<String, String>() {
@Override
public String load(@NonNull String key) {
String accessToken = tpApi.getAccessToken(GRANT_TYPE, key, tpConfigDto.getClientSecret()).getData().getAccessToken();
log.info("Get access Token with feign client first time: [{}]...", accessToken);
return accessToken;
}
});
}

@Override
public TpUserDto getUserDto(String userId) {
try {
String accessToken = loadingCache.get(tpConfigDto.getClientId());
log.info("LoadingCache get access Token: [{}]...", accessToken);
return tpApi.getUserDto(accessToken, userId).getData();
} catch (ExecutionException e) {
log.error("GetUserDto is error...");
throw new RuntimeException(e);
}
}

@Override
public List<TpDepartmentDto> getDepartmentDtos(TpDepartmentQueryDto queryDto) {
try {
String accessToken = loadingCache.get(tpConfigDto.getClientId());
log.info("LoadingCache get access Token: [{}]...", accessToken);
return tpApi.getDepartmentDtos(accessToken, queryDto).getData();
} catch (ExecutionException e) {
log.error("GetDepartmentDtos is error...");
throw new RuntimeException(e);
}
}
}

Test

TpCallCaseTest

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/**
* @author vincent
*/
@SpringBootTest(classes = CallingThirdPartyApiApplicationTests.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@Slf4j
public class TpCallCaseTest {

@Autowired
private TpConfigDao tpConfigDao;

@Test
public void tpCallTest() {
TpConfigDto tpConfigDto = tpConfigDao.selectByClientId("client_id");
TpApiHelperImpl instance = TpApiHelperImpl.getInstance(tpConfigDto);

log.info("GetUserDto method start...");
TpUserDto tpUserDto = instance.getUserDto("userId");
log.info("tpUserDto: {}...", tpUserDto);
log.info("GetUserDto method end...\n");

log.info("GetDepartmentDtos method start...");
TpDepartmentQueryDto queryDto = new TpDepartmentQueryDto();
queryDto.setIdOrParentId(19000L);
queryDto.setPosition("员工");
List<TpDepartmentDto> departmentDtos = instance.getDepartmentDtos(queryDto);
departmentDtos.forEach(departmentDto -> log.info("departmentDto: {}...", departmentDto));
log.info("GetDepartmentDtos method end...");
}
}

AuthServerController Log:

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2021-02-03 12:30:59.918  INFO 10818 --- [           main] c.v.c.o.t.config.AccessTokenFilter       : AccessTokenFilter init...
2021-02-03 12:30:59.926 INFO 10818 --- [ main] c.v.c.o.t.config.AccessTokenFilter : Generate access Token: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=], Expires Time: [2021-02-03 12:33:59.918] ...

2021-02-03 12:31:00.182 INFO 10818 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-02-03 12:31:00.445 INFO 10818 --- [ main] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-02-03 12:31:00.598 INFO 10818 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-02-03 12:31:00.615 INFO 10818 --- [ main] c.v.c.CallingThirdPartyApiApplication : Started CallingThirdPartyApiApplication in 3.719 seconds (JVM running for 12.864)
2021-02-03 12:31:31.436 INFO 10818 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-02-03 12:31:31.436 INFO 10818 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-02-03 12:31:31.437 INFO 10818 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
2021-02-03 12:31:31.477 INFO 10818 --- [nio-8080-exec-1] c.v.c.o.t.c.AuthServerController : GetAccessToken method request parameters -> grant_type: client_credentials, client_id: client_id,client_secret: client_secret ...
2021-02-03 12:31:31.487 INFO 10818 --- [nio-8080-exec-1] c.v.c.o.t.c.AuthServerController : Update Expires Time: Old Expires Time 2021-02-03 12:33:59.918, New Expires Time 2021-02-03 12:34:31.487 ...

2021-02-03 12:31:31.851 INFO 10818 --- [nio-8080-exec-2] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter doFilter...
2021-02-03 12:31:31.852 INFO 10818 --- [nio-8080-exec-2] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter check Token start !!!!!!
2021-02-03 12:31:31.852 INFO 10818 --- [nio-8080-exec-2] c.v.c.o.t.config.AccessTokenFilter : Parameter accessToken is [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=]...
2021-02-03 12:31:31.862 INFO 10818 --- [nio-8080-exec-2] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter check Token end !!!!!!

2021-02-03 12:31:31.865 INFO 10818 --- [nio-8080-exec-2] c.v.c.o.t.c.AuthServerController : GetUserDto method request parameters -> accessToken: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=], userId: [userId] ...

2021-02-03 12:31:31.958 INFO 10818 --- [nio-8080-exec-3] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter doFilter...
2021-02-03 12:31:31.958 INFO 10818 --- [nio-8080-exec-3] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter check Token start !!!!!!
2021-02-03 12:31:31.958 INFO 10818 --- [nio-8080-exec-3] c.v.c.o.t.config.AccessTokenFilter : Parameter accessToken is [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=]...
2021-02-03 12:31:31.958 INFO 10818 --- [nio-8080-exec-3] c.v.c.o.t.config.AccessTokenFilter : AccessTokenFilter check Token end !!!!!!

2021-02-03 12:31:32.003 INFO 10818 --- [nio-8080-exec-3] c.v.c.o.t.c.AuthServerController : GetDepartmentDtos method request parameters -> accessToken: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=], queryDto: [TpDepartmentQueryDto(idOrParentId=19000, position=员工)] ...

TpCallCaseTest Log:

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2021-02-03 12:31:31.122  INFO 10832 --- [           main] c.v.c.o.t.TpCallCaseTest                 : GetUserDto method start...
2021-02-03 12:31:31.845 INFO 10832 --- [ main] c.v.c.o.t.helper.iml.TpApiHelperImpl : Get access Token with feign client first time: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=]...
2021-02-03 12:31:31.849 INFO 10832 --- [ main] c.v.c.o.t.helper.iml.TpApiHelperImpl : LoadingCache get access Token: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=]...
2021-02-03 12:31:31.871 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : tpUserDto: TpUserDto(userId=userId, userCode=USERCODE_VINCENT, userName=Vincent)...
2021-02-03 12:31:31.871 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : GetUserDto method end...

2021-02-03 12:31:31.871 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : GetDepartmentDtos method start...
2021-02-03 12:31:31.872 INFO 10832 --- [ main] c.v.c.o.t.helper.iml.TpApiHelperImpl : LoadingCache get access Token: [98ee0324-0ac9-4e54-9710-e9d834ad19a0_dG9rZW4=]...
2021-02-03 12:31:32.025 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : departmentDto: TpDepartmentDto(id=19000, name=xxx公司, nameEn=xxx_company, parentId=1, position=员工, order=1)...
2021-02-03 12:31:32.026 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : departmentDto: TpDepartmentDto(id=19580, name=人事部, nameEn=personnel_department, parentId=19000, position=员工, order=23)...
2021-02-03 12:31:32.026 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : departmentDto: TpDepartmentDto(id=19581, name=财务部, nameEn=finance_department, parentId=19000, position=员工, order=24)...
2021-02-03 12:31:32.026 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : departmentDto: TpDepartmentDto(id=19582, name=技术部, nameEn=technology_department, parentId=19000, position=员工, order=25)...
2021-02-03 12:31:32.026 INFO 10832 --- [ main] c.v.c.o.t.TpCallCaseTest : GetDepartmentDtos method end...

Case Source Code:https://github.com/V-Vincen/calling-third-party-api


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