java - Spring 启动: Count Page Views - Actuators

Question

我需要计算每个端点上的 View 数。这个想法是为所有端点创建一个通用的请求计数映射，该映射应根据动态输入的端点返回 View 计数。

假设有人想要检查 http://localhost:8080/user/101 上的浏览​​次数。

1. RequestMappping path =/admin/count & RequestParam = url(此处
/用户/101)
2. 然后根据RequestParam创建动态请求http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101
3. 获取并返回动态请求(JSON对象)的响应并获取COUNT的值

I stuck on how to send a dynamic request to http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101 and return the response of it and get the count value

<小时/>

@RequestMapping(path="/admin/count",method=RequestMethod.POST)
public JSONObject count(@RequestParam(name="url") final String url)//@PathVariable(name="url") final String url
{   
    String finalURL = "http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:" + url + "";
    return sendRequestToURL(finalURL);  
}

<小时/>

@RequestMapping(path="/{finalURL}",method=RequestMethod.GET)
public JSONObject sendRequestToURL(@PathVariable("finalURL") String url)
{
    //How to return the response Here
}

<小时/>

这是我直接触发 URL 时得到的结果

GET: http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101

  {
    "name": "http.server.requests",
    "description": null,
    "baseUnit": "seconds",
    "measurements": [
        {
            "statistic": "COUNT",
            "value": 1
        },
        {
            "statistic": "TOTAL_TIME",
            "value": 0.3229436
        },
        {
            "statistic": "MAX",
            "value": 0.3229436
        }
    ],
    "availableTags": [
        {
            "tag": "exception",
            "values": [
                "None"
            ]
        },
        {
            "tag": "method",
            "values": [
                "GET"
            ]
        },
        {
            "tag": "outcome",
            "values": [
                "SUCCESS"
            ]
        },
        {
            "tag": "status",
            "values": [
                "200"
            ]
        }
    ]
}

<小时/>

环境:

    `spring boot 2.1.2.RELEASE`
    <java.version>1.8</java.version>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>

Answer 1

所以你想封装actuator/metrics与 /admin/count

Java 中调用 Rest API 的方法和库有很多种

我会添加最简单的

类似这样的事情

public JSONObject sendRequestToURL(@PathVariable("finalURL") String urlToRead)
{
      StringBuilder result = new StringBuilder();
      URL url = new URL(urlToRead);
      HttpURLConnection conn = (HttpURLConnection) url.openConnection();
      conn.setRequestMethod("GET");
      BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String line;
      while ((line = rd.readLine()) != null) {
         result.append(line);
      }
      rd.close();
      return new JSONObject(result.toString());  // org.json
}

编辑1:

你就快到了。只需要将 String 解析为 JSONObject 即可。也许可以试试这个

String strJson = result.toString().replace("\\\"","'");
JSONObject jo = new JSONObject(strJson.substring(1,json.length()-1));
return jo;

编辑2:

我猜你已经安装了 Spring Security。

当您在内部调用 API 时，Spring 会将其视为需要身份验证的外部调用。

作为解决方法，您可以排除 /actuator来自安全上下文的 API。

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable().authorizeRequests()
     .antMatchers("/actuator*").permitAll()

     ...
}

或 XML 格式

<security:http  auto-config="true"  use-expressions="true"   >
    <security:intercept-url pattern="/actuator*" access="permitAll"/>

    ...
</security:http>

希望 Spring 安全性会忽略此 URL，并且您将不会收到登录表单。