![]() The above three core filter to understand yo,可以自己debug的方式来加深理解~ 1、认证Īuthentication, is the current access system is the user of this system,并且要确认具体是哪个用户.我们在SpringSecurityLogon authentications main implementation needs to realize the above filter chain part of orange squares filter-UsernamePasswordAuthenticationFilter. FilterSecurityInterceptor:Responsible for the permission to check process.Ībove shows the core filters only,Other non-core filter did not show in the picture.ExceptionTranslationFilter:处理过滤器中抛出的任何 AccessDeniedException 和 AuthenticationException. ![]() Generally large projects are using SpringSecurity 来做安全框架.小项目有 Shiro 的比较多,因为相比SpringSecurity,ShiroLearn more simple. See this exemple: UUID uuid = UuidCreator.Must have four friends started coming to write graduation design,For network security frameworkSpringSecurityOnline resources are front and back side are not isolated,Here writing small wei before and after the end of a separate version.This principle is not excessive delve~ See the articles here and here to understand the reason for new UUIDs.Īn implementation of v6 can be found on that same UUID Creator library. The draft is being discussed in a GitHub repository. UUID v6, v7, & v8 are proposed additions to RFC 4122. This library can also generate time-ordered UUIDs, aka UUID v6. Here is another way to generate time-based UUIDs using the open-source project UUID Creator: UUID uuid = UuidCreator.getTimeBased() This source code is published under the Apache 2 license. UUIDGen class source code, part of the Apache Cassandra project.Java Uuid Generator (JUG) originally by Tatu Saloranta.UUID Creator providing Versions 1, 2, 3, 4, 5, and 6.So I asked on the sister site, Software Recommendations Stack Exchange, the question Library to generate Version 1 UUIDs to be called from Java.Īnd here is a condensed list of the implementations mentioned in other Answers here and elsewhere that seem to still be actively supported. 3rd party implementationsĪs seen on the other Answers, there are 3rd-party implementations of Version 1 UUIDs available.Īsking for library recommendations is off-topic here on Stack Overflow. Presumably this is because of the security and privacy concerns from potentially divulging your MAC address and the moment of creation. Java omits Version 1Īs you have noticed, no implementation of Version 1 UUID is required by the Java specifications. The "time" part is a 60-bit timestamp, being the number of 100- nanosecond intervals since midnight 15 October 1582 Coordinated Universal Time (UTC). The "space" part is the MAC address taken from the networking port of the computer to uniquely identify where the id was generated (nearly unique, there have been some infamous screw-ups in assigning MAC addresses by the networking hardware manufacturers). Version 1 UUIDs actually represent a point in space and in time. Solution 4 Version 1 represents a point in space and time Whichever solution we come up with to generate UUID at a later time, every one has a drawback. If a subsequent request to create UUID has a time stamp older than previous request, you end up having a UUID, which is based on previous request's time stamp.Īfter all the analysis, we had to simply go back to create UUID at the time of creation, so that we don't have to pass it as an argument. We found that it has a side effect to mutate the time for records out of order. We needed this to generate UUID for records, which are created ahead and also multiple records at same time, we tried to tweak it by trying to use UUIDGen.createTime(). So if your data has requirement to generate UUID, where records may have same time, this will generate same UUID. UUID uuid = Generators.timeBasedGenerator().generate() īe very careful using, if you need to generate GUID by time other than current time, as this will always generate the same UUID for given time. Solution 1 String timeuuid = .().toString()
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