自定义spring mvc和feign对应的protostuff消息转换器

一、自定义spring mvc protostuff消息转换器

1.protostuff是一个序列化和反序列化的高性能类型，它比json字节数少，且快，适合做rpc调用

2.自定义protostuff消息转换器，代码如下：

public class ProtostuffHttpMessageConverter extends AbstractHttpMessageConverter

①在构造方法中定义一个支持的媒体类型：application/xxx-protostuff

②readInternal方法用protostuff对输入的参数做反序列化工作

③writeInternal方法使用protostuff对返回的对象做序列化操作

3.注册自定义的消息转换器到spring中，代码如下：

@Configuration public class MvcConfig extends WebMvcConfigurationSupport { @Override public void configureMessageConverters(List> converters) { converters.add(protostuffHttpMessageConverter()); } @Bean public ProtostuffHttpMessageConverter protostuffHttpMessageConverter() { return new ProtostuffHttpMessageConverter(); } }

4.暴露一个服务接口，供下面的的feign调用，代码如下：

@Api(tags = "protostuff消息转换器服务") @RestController @RequestMapping(ApiConstants.PATH + "/protostuff") public class ProtostuffController { @ApiOperation(value = "反序列化protostuff二进制数据") @PostMapping(value = "/deserialize") public ResponseVO deserialize(@RequestBody ProtostuffEntity entity) { return ResponseVO.ok(entity); } @ApiOperation(value = "反序列化protostuff二进制数据1") @PostMapping(value = "/deserialize1") public ResponseVO deserialize1(@RequestBody ProtostuffEntity entity) { return ResponseVO.ok(entity); } }

二、自定义feign protostuff消息转换器

1.自定义feign protostuff消息转换器，代码如下：

public class ProtostuffHttpMessageConverter implements GenericHttpMessageConverter

①fegin中统一解码的入口类是SpringEncoder，SpringEncoder获取的converter需要继承GenericHttpMessageConverter类才可生效，否则获取到的responseClass为null，会报no suitable HttpMessageConverter found for response type错误

②canRead和canWirte方法中对媒体类型做判断，如果为application/xxx-protostuff媒体类型，就返回true

2.注册自定义的feign protostuff消息转换，如上面3.注册相同

3.写一个测试fegin client，调用上面的服务，代码如下：

@FeignClient(value = "tsc", url = "http://localhost:8099/api/tsc/protostuff") public interface ProtostuffFeignClient { @ApiOperation(value = "protostuff二进制数据") @PostMapping(value = "/deserialize", consumes = {"application/xxx-protostuff"}, produces = {"application/xxx-protostuff"}) ResponseVO deserialize(@RequestBody ProtostuffEntity entity); @ApiOperation(value = "反序列化protostuff二进制数据1") @PostMapping(value = "/deserialize1") public ResponseVO deserialize1(@RequestBody ProtostuffEntity entity); }

4.写一个测试调用的controller，调用上面的feign服务，代码如下：

@RestController @RequestMapping(ApiConstants.PATH + "/rpc-client") public class ProtostuffClientController { @Autowired private ProtostuffFeignClient feignClient; @ApiOperation(value = "调试protostuff") @GetMapping(value = "/protostuff") public ResponseVO query() { ProtostuffEntity entity = new ProtostuffEntity(); entity.setDesc("protostuff"); entity.setId("protostuff-xxx"); ResponseVO ret = feignClient.deserialize(entity); return ResponseVO.ok(ret); } }