我想为两个独立的控制器配置两个具有相同HttpMessageConverters
的{{1}}。原因是有一些外部服务使用不同的JSON格式。我们无法改变它们。
有可能吗?我可以创建两个MediaType
并以某种方式拆分流量吗?如果可能的话,这是一个好习惯吗?
答案 0 :(得分:0)
最后,我通过重写MessageConverter添加可能性来配置其jaxbcontext并分配支持的包来解决问题。那么,我可以为同一个控制器创建2个不同的MesssageConverters,并根据返回类使用一个或另一个。
public class MoxyMessageConverter extends AbstractHttpMessageConverter<Object> {
private final JAXBContext jAXBContext;
private String[] supportedPackages = { ... }; // some defaults
public MoxyMessageConverter(JAXBContext jAXBContext) {
this.jAXBContext = jAXBContext;
}
public String[] getSupportedPackages() {
return supportedPackages;
}
public void setSupportedPackages(String[] supportedPackages) {
this.supportedPackages = supportedPackages;
}
@Override
protected boolean supports(Class<?> clazz) {
String packageName = clazz.getPackage().getName();
for (String supportedPackage : supportedPackages) {
if (packageName.startsWith(supportedPackage))
return true;
}
return false;
}
@Override
protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
..
}
@Override
protected void writeInternal(Object object, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {
..
}
}
并在@Configuration类中:
@Configuration
@EnableWebMvc
@EnableTransactionManagement
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {
@Override
public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
super.extendMessageConverters(converters);
MoxyMessageConverter defaultMessageConverter = new MoxyMessageConverter(defaultJAXBContext);
defaultMessageConverter.setSupportedPackages(new String[] { "xxx.xxx.xxx.webservices" });
converters.add(0, defaultMessageConverter );
MoxyMessageConverter payUMessageConverter = new MoxyMessageConverter(payUJAXBContext);
payUMessageConverter.setSupportedPackages(new String[] { "xxx.xxx.xxx.webservices.payu" });
converters.add(0, payUMessageConverter);
}
}