cas 002

http://blog.csdn.net/peterwanghao/article/details/8825008Shiro Integrated CAs is a new feature in the 1.2 release.The Shiro-cas module protects the Web app along with the CAS SSO server as a CAS client.A basic understanding of the CAS protocol:1. If you want to access an app

Build a complete Single Sign-On instance by combining cas official documents and a Chinese tutorial. In the official Configuration documentation, each step of the configuration is described in detail, but the software versions are older and some links provided in the documentation are invalid. Wiki. jasig. orgdisplayCASUMDemosmall_love Chinese tutorial is very refined blog. csdn. netsm Build a complete Single Sign-On instance by combining

Cas sso in tomcat6.0.18(1) implementation principle of CASTerms: CAS (Central Authentication Service)TGT (ticket granting ticket)ST (service ticket)PGT (proxy granting ticket) In terms of structure, CAS includes two parts: CAS server and CAS client.

A brief introduction to CAS principleIntroduction to the official CAS website:Main principle:The first time a user accesses a cas service customer web application (Access url:http://192.168.7.90:8081/web1), the CAS deployed in the customer Web application Authenticationfilter, this request is intercepted, the service p

Security: Users only need to enter the user name and password in CAS, and then bind the user through ticket. The CAS client verifies the user through ticket and does not transmit the password online, so security can be ensured, password is not stolen Principle: 1 cookie + N sessions CAS creates cookies when logging on to all applications. Each application creates

The Java.util.concurrent package is built entirely on CAS and will not have this package without CAs. The importance of CAs is visible. CAS Cas:compare and swap, translated into comparisons and exchanged. In Java.util.concurrent package, a kind of optimistic lock which distinguishes from Synchronouse synchronous lock

, the atomic variable class under the Java.util.concurrent.atomic package is implemented using an implementation of optimistic locking CAs.An implementation of optimistic locking-cas (Compare and swap compare and swap):Problems with Locks:Java is guaranteed to be synchronized by the Synchronized keyword before JDK1.5, and this ensures that the variables are accessed exclusively by using a consistent locking protocol to coordinate access to the shared

actually an optimistic lock. In Java, the atomic variable class under the Java.util.concurrent.atomic package is implemented using an implementation of optimistic locking CAs.An implementation of optimistic locking-cas (Compare and swap compare and swap):Problems with Locks:Java is guaranteed to be synchronized by the Synchronized keyword before JDK1.5, and this ensures that the variables are accessed exclusively by using a consistent locking protoco

under the Java.util.concurrent.atomic package is implemented using an implementation of optimistic locking CAs.An implementation of optimistic locking-cas (Compare and swap compare and swap):Problems with Locks:Java is guaranteed to be synchronized by the Synchronized keyword before JDK1.5, and this ensures that the variables are accessed exclusively by using a consistent locking protocol to coordinate access to the shared state, ensuring that no mat

, if the conflict failed to retry until successful. The mechanism used for optimistic locking is Cas,compare and Swap.First, what is CAsCas,compare and swap abbreviations, Chinese translation into comparison and exchange.We all know that before the Java language, concurrency has been widespread and has been used extensively in the server world. So hardware vendors have long been in the chip to add a large number of primitives until the concurrent oper

, the unallocated memory is put in a piece, with a pointer as the boundary point, when the object needs to allocate memory, Moving the pointer to the space area requires the size of the memory, which is allocated as a "pointer collision (Bump the Pointer)" Java object is not structured, a list to record those blocks are available, those things are unavailable, allocation of the object needed to allocate memory to it, and then modify the allocation table, This allocation method is the "Free list"