spring-data-redis 扩展实现时效设置

spring目前在@Cacheable和@CacheEvict等注解上不支持缓存时效设置,只允许通过配置文件设置全局时效。这样就很不方便设定时间。比如系统参数和业务数据的时效是不一样的,这给程序开发造成很大的困扰。不得已,我重写了spring的这两个注解。以下是具体实现。

 

首先定义@Cacheable和@CacheEvict注解类。

package com.lh.common.annotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import com.rd.ifaes.common.dict.ExpireTime;
@Retention(RetentionPolicy.RUNTIME)  
@Target({ElementType.METHOD}) 
public @interface Cacheable {

	public String key() default ""; // 缓存key

	public ExpireTime expire() default ExpireTime.NONE; // 缓存时效,默认无限期

}

 

package com.lh.common.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
 * 缓存清除
 * @author lh
 * @version 3.0
 * @since 2016-8-28
 *
 */
@Target({ ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface CacheEvict {

	String key() default "";// 缓存key
	
}

 

 

具体的切面代码(CacheAspect.java)如下:

package com.lh.common.annotation;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import com.rd.ifaes.common.util.ReflectionUtils;
import com.rd.ifaes.common.util.StringUtils;
import com.rd.ifaes.core.core.util.CacheUtils;

@Aspect
@Component
public class CacheAspect {

	@SuppressWarnings("rawtypes")
	@Autowired
	private RedisTemplate redisTemplate;

	@Around("@annotation(cache)")
	public Object cacheable(final ProceedingJoinPoint pjp, Cacheable cache) throws Throwable {

		String key = getCacheKey(pjp, cache.key());
//		 //方案一:使用自定义缓存工具类操作缓存
//		 Object value = CacheUtils.getObj(key);// 从缓存获取数据
//		 if (value != null) {
//		 return value; // 如果有数据,则直接返回
//		 }
//		 value = pjp.proceed(); // 缓存,到后端查询数据
//		 if (value != null) {
//		 CacheUtils.set(key, value, cache.expire());
//		 }

		// 方案二:使用redisTemplate操作缓存
		@SuppressWarnings("unchecked")
		ValueOperations valueOper = redisTemplate.opsForValue();
		Object value =  valueOper.get(key); // 从缓存获取数据
		if (value != null) {
			return value; // 如果有数据,则直接返回
		}
		
		value = pjp.proceed(); // 缓存,到后端查询数据
		CacheUtils.set(key, value, cache.expire());
		if (cache.expire().getTime() <= 0) { // 如果没有设置过期时间,则无限期缓存
			valueOper.set(key, value);
		} else { // 否则设置缓存时间
			valueOper.set(key, value, cache.expire().getTime(), TimeUnit.SECONDS);
		}
		return value;
	}
	
	@SuppressWarnings("unchecked")
	@Around("@annotation(evict)")
	public Object cacheEvict(final ProceedingJoinPoint pjp, CacheEvict evict) throws Throwable {
		Object value = pjp.proceed(); // 执行方法
		String key = getCacheKey(pjp, evict.key());
//		 //方案一:使用自定义缓存工具类操作缓存
//		 CacheUtils.del(key);

		// 方案二:使用redisTemplate操作缓存
		if (evict.key().equals(key)) {// 支持批量删除
			Set keys = redisTemplate.keys(key.concat("*"));
			redisTemplate.delete(keys);
		}else{
			redisTemplate.delete(key);			
		}
		return value;
	}
	

	/**
	 * 获取缓存的key值
	 * 
	 * @param pjp
	 * @param key
	 * @return
	 */
	private String getCacheKey(ProceedingJoinPoint pjp, String key) {

		StringBuilder buf = new StringBuilder();
		Object[] args = pjp.getArgs();
		
		if(StringUtils.isNotBlank(key)){
			buf.append(key);
			List annoParamNames = AopUtils.getAnnoParams(key);
			String[] methodParamNames = AopUtils.getMethodParamNames(AopUtils.getMethod(pjp));
			if(!CollectionUtils.isEmpty(annoParamNames)){
				for (String ap : annoParamNames) {
					String paramValue = "";
					for (int i = 0; i < methodParamNames.length; i++) {
						if(ap.startsWith(methodParamNames[i])){
							Object arg = args[i];
							if (ap.contains(".")) {
								paramValue = String.valueOf(ReflectionUtils.invokeGetter(arg, ap.substring(ap.indexOf(".") + 1)));
							} else {
								paramValue = String.valueOf(arg);
							}
						}
					}
					int start = buf.indexOf("{" + ap);
					int end = start + ap.length() + 2;
					buf = buf.replace(start, end, paramValue);
				}				
			}
			
		}else{
			buf.append(pjp.getSignature().getDeclaringTypeName()).append(":").append(pjp.getSignature().getName());
			for (Object arg : args) {
				buf.append(":").append(arg.toString());
			}
		}	

		return buf.toString();
	}
}

 

里面使用到AopUtils.java和ExpireTime.java两个类,具体代码如下:

package com.lh.common.annotation;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.asm.*;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 切面编程工具类
 * @author lh
 * @version 3.0
 * @since 2016-8-26
 */
public class AopUtils {

	

	/**
	 * 

获取方法的参数名

* * @param m * @return */ public static String[] getMethodParamNames(final Method m) { final String[] paramNames = new String[m.getParameterTypes().length]; final String n = m.getDeclaringClass().getName(); final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); String className = m.getDeclaringClass().getSimpleName(); ClassReader cr = null; InputStream resourceAsStream = null; try { // cr = new ClassReader(n); // String filePathName = Class.forName(n).getResource("EDayHqbProcessManagerImpl.class").getPath(); resourceAsStream = Class.forName(n).getResourceAsStream(className + ".class"); cr = new ClassReader(resourceAsStream); // cr = new ClassReader(ClassLoader.getSystemResourceAsStream(n + ".class")); } catch (IOException e) { //e.printStackTrace(); // Exceptions.uncheck(e); } catch (ClassNotFoundException e) { //e.printStackTrace(); } finally { if (resourceAsStream != null) { try { resourceAsStream.close(); } catch (IOException e) { e.printStackTrace(); } } } assert cr != null; cr.accept(new ClassVisitor(Opcodes.ASM4, cw) { @Override public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) { final Type[] args = Type.getArgumentTypes(desc); // 方法名相同并且参数个数相同 if (!name.equals(m.getName()) || !sameType(args, m.getParameterTypes())) { return super.visitMethod(access, name, desc, signature, exceptions); } MethodVisitor v = cv.visitMethod(access, name, desc, signature, exceptions); return new MethodVisitor(Opcodes.ASM4, v) { @Override public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) { int i = index - 1; // 如果是静态方法,则第一就是参数 // 如果不是静态方法,则第一个是"this",然后才是方法的参数 if (Modifier.isStatic(m.getModifiers())) { i = index; } if (i >= 0 && i < paramNames.length) { paramNames[i] = name; } super.visitLocalVariable(name, desc, signature, start, end, index); } }; } }, 0); return paramNames; } /** *

比较参数类型是否一致

* * @param types asm的类型({@link Type}) * @param clazzes java 类型({@link Class}) * @return */ private static boolean sameType(Type[] types, Class[] clazzes) { // 个数不同 if (types.length != clazzes.length) { return false; } for (int i = 0; i < types.length; i++) { if (!Type.getType(clazzes[i]).equals(types[i])) { return false; } } return true; } /** * 取得切面调用的方法 * @param pjp * @return */ public static Method getMethod(ProceedingJoinPoint pjp){ Signature sig = pjp.getSignature(); MethodSignature msig = null; if (!(sig instanceof MethodSignature)) { throw new IllegalArgumentException("该注解只能用于方法"); } msig = (MethodSignature) sig; Object target = pjp.getTarget(); Method currentMethod = null; try { currentMethod = target.getClass().getMethod(msig.getName(), msig.getParameterTypes()); } catch (NoSuchMethodException e) { } catch (SecurityException e) { } return currentMethod; } public static List getMatcher(String regex, String source) { List list = new ArrayList(); Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(source); while (matcher.find()) { list.add(matcher.group()); } return list; } /** * 取得注解参数 (?=exp) 匹配exp前面的位置 (?<=exp) 匹配exp后面的位置 (?!exp) 匹配后面跟的不是exp的位置 (? getAnnoParams(String source){ String regex = "(?<=\\{)(.+?)(?=\\})"; return getMatcher(regex, source); } }

 

package com.lh.common.dict;

/**
 * 失效时间枚举类
 * @author lh
 * @version 3.0
 * @since 2016-8-25
 *
 */
public enum ExpireTime {
	
	/**
	 * 无固定期限
	 */
	NONE(0, "无固定期限")
	
	/**
	 * 1秒钟
	 */
	,ONE_SEC(1, "1秒钟")

	/**
	 * 5秒钟
	 */
	,FIVE_SEC(5, "5秒钟")

	/**
	 * 10秒钟
	 */
	,TEN_SEC(10, "10秒钟")

	/**
	 * 30秒钟
	 */
	,HALF_A_MIN(30, "30秒钟")

	/**
	 * 1分钟
	 */
	,ONE_MIN(60, "1分钟")

	/**
	 * 5分钟
	 */
	,FIVE_MIN(5 * 60, "5分钟")

	/**
	 * 10分钟
	 */
	,TEN_MIN(10 * 60, "10分钟")
	
	/**
	 * 20分钟
	 */
	,TWENTY_MIN(20 * 60, "20分钟")

	/**
	 * 30分钟
	 */
	,HALF_AN_HOUR(30 * 60, "30分钟")

	/**
	 * 1小时
	 */
	,ONE_HOUR(60 * 60, "1小时")

	/**
	 * 1天
	 */
	,ONE_DAY(24 * 60 * 60, "1天")

	/**
	 * 1个月
	 */
	,ONE_MON(30 * 24 * 60 * 60, "1个月")

	/**
	 * 1年
	 */
	,ONE_YEAR(365 * 24 * 60 * 60, "1年")

	;
	
	/**
	 * 时间
	 */
	private final int time;
	/**
	 * 描述
	 */
	private final String desc;
	
	ExpireTime(int time, String desc) {
		this.time = time;
		this.desc = desc;
	}

	
	/**
	 * 获取具体时间
	 * @return
	 */
	public int getTime() {
		return time;
	}

	/**
	 * 获取时间描述信息
	 * @return
	 */
	public String getDesc() {
		return desc;
	}
	
	/**
	 * 根据时间匹配失效期限
	 * @param time
	 * @return
	 */
	public static ExpireTime match(int time){
		if(NONE.getTime() == time){
			return NONE;
		}else if(ONE_SEC.getTime() ==  time){
			return ONE_SEC;
		}else if(FIVE_SEC.getTime() ==  time){
			return FIVE_SEC;
		}else if(TEN_SEC.getTime() ==  time){
			return TEN_SEC;
		}else if(HALF_A_MIN.getTime() ==  time){
			return HALF_A_MIN;
		}else if(ONE_MIN.getTime() ==  time){
			return ONE_MIN;
		}else if(FIVE_MIN.getTime() ==  time){
			return FIVE_MIN;
		}else if(TEN_MIN.getTime() ==  time){
			return TEN_MIN;
		}else if(TWENTY_MIN.getTime() == time){
			return TWENTY_MIN;
		}else if(HALF_AN_HOUR.getTime() ==  time){
			return HALF_AN_HOUR;
		}else if(ONE_HOUR.getTime() ==  time){
			return ONE_HOUR;
		}else if(ONE_DAY.getTime() ==  time){
			return ONE_DAY;
		}else if(ONE_MON.getTime() ==  time){
			return ONE_MON;
		}else if(ONE_YEAR.getTime() ==  time){
			return ONE_YEAR;
		}
		return HALF_AN_HOUR;
	}
	
}

 

  配置中的RdRedisCache.java 代码如下:

package com.lh.common.jedis;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import net.sf.ehcache.Element;

import org.springframework.cache.Cache;
import org.springframework.cache.support.SimpleValueWrapper;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;

public class RdRedisCache implements Cache {

	private RedisTemplate redisTemplate;
	private String name;

	public RedisTemplate getRedisTemplate() {
		return redisTemplate;
	}

	public void setRedisTemplate(RedisTemplate redisTemplate) {
		this.redisTemplate = redisTemplate;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String getName() {
		return this.name;
	}

	@Override
	public Object getNativeCache() {
		return this.redisTemplate;
	}

	@Override
	public ValueWrapper get(Object key) {
		
		final String keyf = obj2Str(key);
		Object object = null;
		object = redisTemplate.execute(new RedisCallback() {
			public Object doInRedis(RedisConnection connection)
					throws DataAccessException {

				byte[] key = keyf.getBytes();
				byte[] value = connection.get(key);
				if (value == null) {
					return null;
				}
				return toObject(value);

			}
		});
		return (object != null ? new SimpleValueWrapper(object) : null);
	}

	@Override
	public void put(Object key, Object value) {
		
		final String keyf = obj2Str(key);
		final Object valuef = value;
		final long liveTime = 86400;

		redisTemplate.execute(new RedisCallback() {
			public Long doInRedis(RedisConnection connection)
					throws DataAccessException {
				byte[] keyb = keyf.getBytes();
				byte[] valueb = toByteArray(valuef);
				connection.set(keyb, valueb);
				if (liveTime > 0) {
					connection.expire(keyb, liveTime);
				}
				return 1L;
			}
		});
	}
	
	public String obj2Str(Object key){
		String keyStr = null;
		if(key instanceof Integer){
			keyStr = ((Integer)key).toString();
		}else if(key instanceof Long){
			keyStr = ((Long)key).toString();
		}else {
			keyStr = (String)key;
		}
		return keyStr;
	}

	/**
	 * 描述 : . 
*

* <使用方法说明> *

* * @param obj * @return */ private 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; } /** * 描述 : .
*

* <使用方法说明> *

* * @param bytes * @return */ private Object toObject(byte[] bytes) { Object obj = null; try { ByteArrayInputStream bis = new ByteArrayInputStream(bytes); ObjectInputStream ois = new ObjectInputStream(bis); obj = ois.readObject(); ois.close(); bis.close(); } catch (IOException ex) { ex.printStackTrace(); } catch (ClassNotFoundException ex) { ex.printStackTrace(); } return obj; } @Override public void evict(Object key) { final String keyf = obj2Str(key); redisTemplate.execute(new RedisCallback() { public Long doInRedis(RedisConnection connection) throws DataAccessException { return connection.del(keyf.getBytes()); } }); } @Override public void clear() { redisTemplate.execute(new RedisCallback() { public String doInRedis(RedisConnection connection) throws DataAccessException { connection.flushDb(); return "ok"; } }); } @Override public T get(Object key, Class type) { ValueWrapper wrapper = get(key); return wrapper == null ? null : (T) wrapper.get(); } @Override public ValueWrapper putIfAbsent(Object key, Object value) { synchronized (key) { ValueWrapper wrapper = get(key); if (wrapper != null) { return wrapper; } put(key, value); return toWrapper(new Element(key, value)); } } private ValueWrapper toWrapper(Element element) { return (element != null ? new SimpleValueWrapper(element.getObjectValue()) : null); } }

 

 

  spring配置文件的相关配置如下:

 
 	
		 
		 
		 
	
	
	
	
		
		
		
	
	
 	
 	
         
         
         
         
 	
 	
	
	 
	
  	
	  
      
          
              
            	 
              
          
      
	
	
	
	

 

 

 The end!

 

 

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