publicfinalbooleancompareAndSet(intexpect,intupdate){returnunsafe.compareAndSwapInt(this, valueOffset, expect, update); } 整体的过程就是这样子的,利用CPU的CAS指令,同时借助JNI来完成Java的非阻塞算法。其它原子操作都是利用类似的特性完成的。 其中unsafe.compareAndSwapInt(this, valueOffset, expect, update);...
publicclassVolatileTest {privatevolatilestaticbooleanflag =false;publicstaticvoidmain(String[] args) { Thread write=newThread(newRunnable() {publicvoidrun() {//TODO Auto-generated method stubflag =true; } }); Thread read=newThread(newRunnable() {publicvoidrun() {while(true) {if(flag) {//f...
LookChem provides you with the latest supply information of 2,3-Pentanedione CAS number 600-14-6 CasNumber and chemical information related to this product. You can buy 2,3-Pentanedione CAS number 600-14-6here
-- 登录记录缓存 锁定10分钟--> <cache name="loginRecordCache" maxEntriesLocalHeap="2000" eternal="false" timeToIdleSeconds="600" timeToLiveSeconds="0" overflowToDisk="false" statistics="true"> </cache> </ehcache> 自定义MyShiroCasRealm.java继承CasRealm 代码语言:javascript 代码运行次数:0 运行 ...
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Cas NO.:109384-19-2 Name:N-BOC-4-Hydroxypiperidine Melting Point: Boiling Point:292.3℃ at 760 mmHg Refractive index:1.495 Flash Point:130.6℃ Purity:99% usage:Organic Intermediates Brand Name:Furuntongda +86 13147489979 EINECS:600-916-6 ...
Updatetime:Jul 29 2019 Atomax Chemicals Co.,Ltd Contact Supplier CAS No. 52888-49-0 (Alanine,N-(2,6-dimethylphenyl)-, methyl ... Min.Order:1 Kilogram Supply Ability:10000 Kilogram/Month Appearance:comply the standards Purity:98% 99% ...
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If the driver version is less than 510, update both the driver and the CUDA versions sudo wgethttps://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin...
这个也是线上非常常见的一个问题,就是多客户端同时并发写一个 key,可能本来应该先到的数据后到了,导致数据版本错了;或者是多客户端同时获取一个 key,修改值之后再写回去,只要顺序错了,数据就错了。 而且Redis 自己就有天然解决这个问题的 CAS 类的乐观锁方案。