关于这个Double-Checked Lock的讨论有很多,目前公认这是一个Anti-Pattern,不推荐使用! 那么有没有什么更好的写法呢? 有!这里又要提出一种新的模式——[color=red][b]Initialization on Demand Holder[/b][/color]. 这种方法使用内部类来做到延迟加载对象,在初始化这个内部类的时候,JLS(Java Language Sepcificati...
Singleton Anti-Pattern: with more and more classes calling getInstance the code gets more and more tightly coupled, monolithic, not testable and hard to change and hard to reuse because of not configurable, hidden dependencies. Also, there would be no need for this clumsy double checked locking ...
Java theory and practice: The pseudo-typedef antipatternBrian Goetz
double check locking 之前曾经看过一些关于Singleton pattern相关的文章,可能是比较早的文章,推荐的方式是采用double check locking的方式实现Singleton lazy load. 但是这种方式存在一些已知的问题。 使用double check locking的目是避免每次调用getInstance方法,在检查INSTANCE的时候就竞争锁,但是这种设计模式在某些情况下是...
Contains the count of anti-patterns. voidsetSeverity(Stringseverity) Contains the severity of anti-patterns. StringtoString() Returns a string representation of this object. AntipatternSeveritySummarywithCount(Integercount) Contains the count of anti-patterns. ...
StringgetAntipatternReportStatus() The status of the anti-pattern report generation. StringgetAntipatternReportStatusMessage() The status message for the anti-pattern. inthashCode() voidmarshall(ProtocolMarshallerprotocolMarshaller) Marshalls this structured data using the given...
Referring to the previous antipattern, when an exception is thrown that means that something unexpected happened. The last thing you should do is swallow these exceptions instead of processing its useful information. For example, if you have a method that should only return 1 object because you ...
最近总部的漏洞扫描团队天天对我们的系统进行SQL注入,登陆破解..等等,搞得表示压力山大,其中对我们 的滑块验证码存在绕过登陆问题发报,最终把账号、密码登陆下线,今天终于把这块的bug进行修复了,先看效果: 第一步:弹出框架子模块_src/components/loginmove/slide-verify.vue <template> container...
Double.NaN表示一种特殊的 double 值,表示未定义或非法值。 113节点(node): 链式数据结构中,某个对象的常用称呼。 114null: 一种特殊的指针值,表示“没有指向任何东西”。 115数值分析(numerical analysis): 使用逼近法研究算法的领域,比如实数以及从逼近计算中得到的错误。
curiously-recurring-template-pattern currying data-access-object data-bus data-locality data-mapper data-transfer-object decorator delegation dependency-injection dirty-flag domain-model double-buffer double-checked-locking double-dispatch dynamic-proxy ...