liubao68 commented on issue #2152:
URL:
https://github.com/apache/servicecomb-java-chassis/issues/2152#issuecomment-748985847
FallbackPolicy 的实现是 bean， 可以参考其他 java-chassis 的实现， 比如：
```
@Component
public class FromCacheFallbackPolicy implements FallbackPolicy {
private static final String POLICY_NAME = "fromCache";
private Map<String, Response> cachedResponse = new ConcurrentHashMap<>();
@Override
public String name() {
return POLICY_NAME;
}
@Override
public Response getFallbackResponse(Invocation invocation, Throwable
error) {
if (cachedResponse.get(invocation.getInvocationQualifiedName()) != null)
{
return cachedResponse.get(invocation.getInvocationQualifiedName());
} else {
return Response.succResp(null);
}
}
@Override
public void record(Invocation invocation, Response response, boolean
isSuccess) {
if (isSuccess) {
cachedResponse.put(invocation.getInvocationQualifiedName(), response);
}
}
}
```
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