统一日志格式

亦凉 2022-09-14 14:24 205阅读 0赞

#### 1.日志对象 ####

统一日志格式方便查看定位问题又方便统计收集。定义一个LogObject对象，里面定义日志的各个字段。例如：

import com.fasterxml.jackson.annotation.JsonInclude;
    import com.fasterxml.jackson.annotation.JsonInclude.Include;
    import com.fasterxml.jackson.annotation.JsonProperty;
    
    public class LogObject {
        @JsonProperty(index = 1)
        private String eventName;//事件名称,一般就是业务方法名称
    
        @JsonProperty(index = 2)
        private String traceId;  //调用链id，多个服务间传递此ID，可以通过traceId查询所有日志
    
        @JsonProperty(index = 3)
        private String msg;      //消息内容
    
        @JsonProperty(index = 4)
        private long costTime; //接口响应时间
    
        @JsonProperty(index = 6)
        private Integer userId; //用户id
    
        @JsonProperty(index = 7)
        private Object others; //其他业务参数
    
        @JsonProperty(index = 8)
        private Object request; //接口请求入参
    
        @JsonProperty(index = 9)
        private Object response; //接口返回值
    
        public Integer getUserId() {
            return userId;
        }
        public LogObject setUserId(Integer userId) {
            this.userId = userId;
            return this;
        }
        public Object getRequest() {
            return request;
        }
        public LogObject setRequest(Object request) {
            this.request = request;
            return this;
        }
       //......

使用链式的风格，方便设置字段的值：

long endTime = System.currentTimeMillis();
    LogObject logObject = new LogObject();
    logObject.setEventName(methodName)
             .setMsg(msg)
             .setTraceId(traceId)
             .setUserId(userId)
             .setRequest(orderReqDto)
             .setResponse(response)
             .setCostTime((endTime - beginTime));
    
    LOGGER.info(JSON.toJSONString(logObject));

#### 2.实现方案 ####

##### 2.1.业务方法的 try-catch-finally中加入日志 #####

//示例代码
    public String sayHello(String name){
            long beginTime = System.currentTimeMillis();
            LogObject logObject = new LogObject();
            try {
                //业务逻辑代码
               logObject.setMsg("200");
            }catch (Exception e){
                 logObject.setMsg("500");
            }finally {
                //统一日志收集代码
                logObject.setEventName("sayHello")
                        .setTraceId("sayHello" + "_" + beginTime)
                        .setUserId(userId)
                        .setRequest("name:" + name)
                        .setResponse("response")
                        .setCostTime(System.currentTimeMillis() - beginTime);
            }
            return "hello_" + name;
        }

##### 2.2.aop中拦截，但是会影响一点性能 #####

#1引入AOP依赖
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
    
    #2.添加AOP配置，监听环绕通知
    @Aspect
    @Component
    public class LogAspect {
        /**
         * 环绕通知需要携带ProceedingJoinPoint类型的参数
         * 环绕通知类似于动态代理的全过程：ProceedingJoinPoint类型的参数可以决定是否执行目标方法
         * @return
         */
        @Around("execution(* com.zypcy.first1.controller.*.*(..))")
        public Object aroundMethod(ProceedingJoinPoint pjp) {
            long beginTime = System.currentTimeMillis();
            ResponseData responseData = new ResponseData();
            LogObject logObject = new LogObject();
            Object result = null;
            String methodName = pjp.getSignature().getName();
            //执行目标方法
            try {
                //前置通知
                result = pjp.proceed();
                responseData.setSuccess(true).setCode(ResponseCodeEnum.SUCCESS).setData(result);
            } catch (Throwable e) {
                //异常通知
                responseData.setSuccess(false).setCode(ResponseCodeEnum.FAIL).setMsg(e.getMessage());
            }finally {
                logObject.setEventName(methodName)
                        .setMsg(responseData.getCode())
                        .setTraceId(methodName + "_" + beginTime)
                        .setUserId(1)
                        .setRequest(JSON.toJSONString(pjp.getArgs()))
                        .setResponse(JSON.toJSONString(responseData))
                        .setCostTime(System.currentTimeMillis() - beginTime);
            }
            //后置通知
            System.out.println("The method " + methodName + " exec ends , logObject : " + JSON.toJSONString(logObject));
            return result;
        }
    }

[源码下载][Link 1]

[Link 1]: https://download.csdn.net/download/zhuyu19911016520/30063509