cacheable

SpringCache @ Cacheable calls methods in the same class, which causes the cache to fail and the solution is as follows, Because the project needs to use SpringCache for a bit of caching, but it has never been used before (in fact, it has never been heard of) SpringCache, so you must first learn it. Find an article on the Internet. It is better to learn it first. The address is: Https://www.ibm.com/developerworks/cn/opensource/os-cn-spring-cache/ I wou

Code:@Override @Cacheable (value= Cache_name, key ="' Cartitemkey_ ' + #uId") PublicList//cartitemkey_1String key ="Cartitemkey_"+uId; Try{ListGet(Key, List.)class); Logger.info ("===========================redis Call = = ="); returnKeystr; } Catch(Exception e) {e.printstacktrace (); } return NULL; }The reasons for this arise are:Nothing was found at the time of the first call. Returns nullIn fact, NULL is also a kind of data,It's been cach

Today, when annotated with cacheable, null values are found and cached. The next time another system updates the value, from the cache, or the null value, there is a problem. So on the one hand, you want the other system to update, to clear the cache, on the other hand do not want to cache too much junk data. Reference http://stackoverflow.com/questions/12113725/ How-do-i-tell-spring-cache-not-to-cache-null-value-in-

Come to a domain name how to determine its cache or not, the high-level professional crawler can certainly do analysis, if not very rigorous analysis, through the shell script can also be implemented, to see me this layer of pages of small crawl bar, ha ha, first script execution after the result diagram:650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/7C/D6/wKioL1bZGG_QERYEAAE4F_-W1L8999.png "title=" qq%e5% 9b%be%e7%89%8720151029152933.png "alt=" Wkiol1bzgg_qeryeaae4f_-w1l8999.png "/>

to define a cache manager, for the implementation of caching logic, the implementation of object additions and deletions, support the generic type of the value object, is actually put the data in the map　　　　Import above the service layer Cachecontext　　　　2. Springcache annotation @cacheable (value = "Accountcache")This annotation means that when this method is called, it is queried from a cache called Accountcache, and if not, the actual method (that

web| Cache | design For a Web site with a daily visit to millions, the speed is quickly becoming a bottleneck. In addition to optimizing the application of the content publishing system itself, if you can not need real-time update of the dynamic page output to the static page to publish, the speed of the promotion will be significant, because a dynamic page speed is often slower than static pages 2-10 times, and static Web content if can be cached in memory, The speed of access will be even more

ArticleDirectory Server Configuration === Index ==== [Overview of Web Cache Mechanism] 1-roles and types of Web Cache [Overview of Web Cache Mechanism] 2-Web browser cache mechanism [Overview of Web Cache Mechanism] 3-how to build a cacheable site [Overview of Web Cache Mechanism] 4-Web Cache Mechanism in the HTML5 Era [Overview of Web Cache Mechanism] 5-new ideas on Cache Mechanism in the web app age ================ Aft

survive before it expires (in seconds), only when Eternal=false is used, and the default value is 0, which indicates the time to live infinityOverflowtodisk If the disk cache is enabled when there is not enough memory (that is, Ehcache writes the object to disk when the number of objects in memory reaches Maxelementsinmemory)-maxelementsondisk= "20000"Maxelementsinmemory= "2000"Eternal= "true"Overflowtodisk= "true"Diskpersistent= "true"/>This file contains the index of the cache that has been p

Problem Description Recently we used spring cache + Redis to do caching. Under high concurrency the @cacheable annotation returns a null content. Look at the source code, in the use of annotations to get the cache, the Rediscache get method will first determine whether the key exists, and then to get the value. There's a copper leak, and when thread 1 judges that the key is there, then the key expires, and then the thread 1 returns NULL when it gets

In some applications, some specific addresses could need to is read from their physical locations each time they is Accesse D (e.g., a status register within FPGA). The L2 controller offers registers that control whether certain ranges of memory is cacheable, and whether one or more re Questors is actually permitted to access these ranges. The registers is referred to as MARs (memory attribute registers).note-using the volatile keyword in the C langua

From: http://kerneltrap.org/mailarchive/linux-kernel/2008/4/29/1657814 AMIDS some heavy flaming, it's clear that there is a lot of confusion on how Cachability and ioremap cooperate on x86 on a hardware level, and how this Interacts with Linux (both

Of course, the premise is to open the CDN in a function reload_into_ims on. So the user sends over No-cache also not afraid of. Because this will give No-cache to If-modified-since. So we write the program is mainly to If-modified-since control.

Spring Cache Annotations @cacheable, @CacheEvict, @CachePut use starting with 3.1, spring introduces support for the cache. The methods and principles used are similar to spring's support for transaction management. Spring Cache is a method of action, and the core idea is that when we call a caching method, the method parameter and the return result are stored in the cache as a key-value pair, and the method is no longer executed the next time the sam

annotations to support the spring Cache. Its core is mainly @cacheable and @cacheevict. The method that uses the @cacheable tag is executed after the spring cache caches its return results, and the method that uses the @cacheevict tag removes some elements of the spring cache before or after the method executes. Let's take a look at some of the annotations provided by spring based annotations on cache supp