bug: 在路由上配置了一个前置插件ext-plugin-pre-req和后置插件ext-plugin-post-resp，在前置插件中获取请求信息，在后置插件中获取响应信息，在多线程环境下，如何将请求数据串联起来

[forget99]

Issue description

在路由上配置了一个前置插件ext-plugin-pre-req和后置插件ext-plugin-post-resp，在前置插件中获取请求信息，在后置插件中获取响应信息，在多线程环境下，如何将请求数据串联起来。使用线程id和requestId都会出现错乱。

code

@Override
public void filter(HttpRequest request, HttpResponse response, PluginFilterChain chain) {
    long requestId = request.getRequestId();

    String uuid = UuidUtil.create2();
    Thread thread = Thread.currentThread();
    thread.setName(uuid);
    logger.info("【前置拦截过滤器线程名称】：" + uuid);

    String path = request.getPath();
    requestPathMaps.put(uuid, path);
    chain.filter(request, response);
}


@Override
public void postFilter(PostRequest request, PostResponse response, PluginFilterChain chain) {
    Thread thread = Thread.currentThread();
    String uuid = thread.getName();
    logger.info("【后置拦截过滤器线程名称】：" + uuid);

    long requestId = request.getRequestId() - 1;
    String responseBody = formatBody(request.getBody());

    logger.info("【后置拦截过滤器接口路径】：" + requestPathMaps.get(uuid));
    logger.info("【后置拦截过滤器接口响应结果】：" + responseBody);

    response.setBody(responseBody);
}

[xiaolajiyhy]

请问找到解决办法了吗？

[forget99]

请问找到解决办法了吗？

@xiaolajiyhy 找到了，apisix内置nginx，在java插件中可以通过requiredVars方法获取nginx内置变量，requestId就是请求唯一id，下面是解决办法：
@Override public List<String> requiredVars() { List<String> vars = new ArrayList<>(); vars.add("request_id"); return vars; }

@Override public void filter(HttpRequest request, HttpResponse response, PluginFilterChain chain) { String requestId = request.getVars("request_id"); }

@Override public void postFilter(PostRequest request, PostResponse response, PluginFilterChain chain) { String requestId = request.getVars("request_id"); }

[xiaolajiyhy]

请问找到解决办法了吗？

@xiaolajiyhy 找到了，apisix内置nginx，在java插件中可以通过requiredVars方法获取nginx内置变量，requestId就是请求唯一id，下面是解决办法： @Override public List<String> requiredVars() { List<String> vars = new ArrayList<>(); vars.add("request_id"); return vars; }

@Override public void filter(HttpRequest request, HttpResponse response, PluginFilterChain chain) { String requestId = request.getVars("request_id"); }

@Override public void postFilter(PostRequest request, PostResponse response, PluginFilterChain chain) { String requestId = request.getVars("request_id"); }

感谢，我生成了一个uuid ，然后让上游在请求头里回传给我