一. 说明
-
功能：在 redisTemplate 命令执行前后 输出日志
-
原理
- 作用是输出 RedisTemplate 命令执行日志。包括：命令名称、参数、返回值等
- 原理是使用动态代理拦截类 redisConnectionFactory 的 getConnection() 方法，监控Redis命令
- 目前主要输出 get/set/pExpire/pSetEx 等命令日志，可根据需要扩展
- 示例
- 单元测试
@Test
public void RedisTemplateTest() {
String key = "testTemplate:1";
this.redisTemplate.opsForValue().set(key, "testTemplatevalue1", 1000L, TimeUnit.MILLISECONDS);
String value = this.redisTemplate.opsForValue().get(key);
}
- 日志输出
// 输出日志
// 参数分别为：key、超时时间、value
Redis Log: method:pSetEx params:["testTemplate:1","1000","testTemplatevalue1"] result:
// 参数分别为：key 返回结果：result
Redis Log: method:get params:["testTemplate:1"] result:testTemplatevalue1
二. 源码
import com.alibaba.fastjson.JSON;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
// https://blog.csdn.net/youbl/article/details/109266634
// https://github.com/youbl/study/tree/master/demo-log-redis
/**
* 本类的作用是输出 RedisTemplate 命令执行日志。包括：命令名称、参数、返回值等
* 原理是使用动态代理拦截类 redisConnectionFactory 的 getConnection() 方法，监控Redis命令
* 目前主要输出 get/set/pExpire/pSetEx 等命令日志，可根据需要扩展
*/
@Configuration
@Slf4j
public class RedisCommandLogBean implements BeanPostProcessor {
@Override
public Object postProcessBeforeInitialization(Object o, String s) throws BeansException {
return o;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) {
if (beanName.equals("redisConnectionFactory")) {
// 使用代理，覆盖原Redis工厂类
return getProxy(bean, invocation -> this.interceptorRedisFactory(invocation));
} else if (bean instanceof RedisTemplate) {
}
return bean;
}
// 使用 ProxyFactory 类生成动态代理方法
public static Object getProxy(Object obj, MethodInterceptor interceptor) {
ProxyFactory proxy = new ProxyFactory(obj);
proxy.setProxyTargetClass(true);
proxy.addAdvice(interceptor);
return proxy.getProxy();
}
// 如果是getConnection方法，则对该方法进行代理
public Object interceptorRedisFactory(MethodInvocation invocation) throws Throwable {
Object ret = invocation.proceed();
String methodName = invocation.getMethod().getName();
if (methodName.equals("getConnection")) {
return getProxy(ret, this::interceptorGetConnection);
}
return ret;
}
private Object interceptorGetConnection(MethodInvocation invocation) throws Throwable {
Method method = invocation.getMethod();
String name = method.getName();
if (name.equals("isPipelined") || name.equals("close"))
return invocation.proceed();
RedisDto redisDto = new RedisDto();
redisDto.setMethodName(name);
Object target = invocation.getThis();
redisDto.setClassName(target.getClass().getName());
Object[] args = invocation.getArguments();
// 方法名(命令参数）
String commandName = invocation.getMethod().getName();
if (this.containMethod(commandName)) {
String[] argsStr = new String[args.length];
for (int i = 0; i < args.length; i++) {
// 字节数组类型
if (args[i] instanceof byte[]) {
String s = new String(toByteArray(args[i]));
// 有乱码，乱码中包含字符串"xp"，原因不明。这里删除乱码
if (s.indexOf("xp") > 0) {
s = s.substring(s.indexOf("xp") + 2).trim();
}
argsStr[i] = s;
} else {
argsStr[i] = args[i].toString();
}
}
redisDto.setParams(JSON.toJSONString(argsStr));
}
Object ret = null;
long start = System.currentTimeMillis();
try {
ret = invocation.proceed();
String result = new String(toByteArray(ret));
// 有乱码，乱码中包含字符串"xp"，原因不明。这里删除乱码
if (result.indexOf("xp") > 0) {
result = result.substring(result.indexOf("xp") + 2).trim();
}
redisDto.setResult(result);
return ret;
} catch (Exception ex) {
redisDto.setEx(ex);
throw ex;
} finally {
redisDto.setExecuteTime(System.currentTimeMillis() - start);
if (this.containMethod(commandName))
log.info("Redis Log: method:{} params:{} result:{}",
redisDto.getMethodName(), redisDto.getParams(), redisDto.getResult());
}
}
// 监控的命令
private boolean containMethod(String commandName) {
if (commandName.equalsIgnoreCase("get")
|| commandName.equalsIgnoreCase("set")
|| commandName.equalsIgnoreCase("pExpire")
|| commandName.equalsIgnoreCase("pSetEx")) { // 对应方法：ValueOperations --> set(K key, V value, long timeout, TimeUnit unit)
return true;
}
return false;
}
public byte[] toByteArray(Object obj) {
byte[] bytes = null;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(obj);
oos.flush();
bytes = bos.toByteArray();
oos.close();
bos.close();
} catch (IOException ex) {
ex.printStackTrace();
}
return bytes;
}
@Data
public class RedisDto {
private String className;
private String methodName;
private String params;
private Object result;
private long executeTime;
private String remark;
private Exception ex;
}
}