Zuul的性能优化-异步

public class CustomFilter extends ZuulFilter {

    private AsyncRestTemplate asyncRestTemplate;

    public CustomFilter(AsyncRestTemplate asyncRestTemplate) {
        this.asyncRestTemplate = asyncRestTemplate;
    }

    @Override
    public String filterType() {
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 0;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        String url = "http://service-name/api";
        ListenableFuture<ResponseEntity<String>> future = asyncRestTemplate.getForEntity(url, String.class);
        future.addCallback(new ListenableFutureCallback<ResponseEntity<String>>() {
            @Override
            public void onSuccess(ResponseEntity<String> result) {
                ctx.setSendZuulResponse(true);
                ctx.setResponseStatusCode(HttpStatus.OK.value());
                ctx.setResponseBody(result.getBody());
                ctx.getResponse().setContentType("application/json;charset=UTF-8");
            }

            @Override
            public void onFailure(Throwable ex) {
                ctx.setSendZuulResponse(false);
                ctx.setResponseStatusCode(HttpStatus.INTERNAL_SERVER_ERROR.value());
                ctx.setResponseBody("请求失败：" + ex.getMessage());
                ctx.getResponse().setContentType("application/json;charset=UTF-8");
            }
        });
        return null;
    }
}