Background in compilers and embedded systems... 2Motive? 3Motive: Can it be done in C++? 4Session type 5Session type ? 6"A normal adult programmer never gives a thought about types. That is something C++, we can settle with this explanation: But that is not what “type” in “Session type” means. 28Session type ? 29Session? • Interaction of two or more entities. • It has a beginning and (usually) interactions is happening. 30Session? • Can we describe a valid sequence of interactions? • Interaction diagram Client Server int int ADD DIV int double end Branching 31Session? • Can we describe a

operating system specific source of the seed. 22 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 22 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

......................................................................................... 104 SESSION 缓存 ............................................................................................. Authorization：授权，即权限验证，验证某个已认证的用户是否拥有某个权限；即判断用 户是否能做事情，常见的如：验证某个用户是否拥有某个角色。或者细粒度的验证某个用 户对某个资源是否具有某个权限； Session Manager：会话管理，即用户登录后就是一次会话，在没有退出之前，它的所有信 息都在会话中；会话可以是普通 JavaSE 环境的，也可以是如 Web 环境的； Cryptography：加 SessionManager：如果写过 Servlet 就应该知道 Session 的概念，Session 呢需要有人去管理 它的生命周期，这个组件就是 SessionManager；而 Shiro 并不仅仅可以用在 Web 环境，也 可以用在如普通的 JavaSE 环境、EJB 等环境；所有呢，Shiro 就抽象了一个自己的 Session 来管理主体与应用之间交互的数据；这样的话，比如我们在 Web

operating system specific source of the seed. 24 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 24 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 20 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 19 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

cache allows all sessions within the same TiDB �→ instance to share the plan cache. Compared with session-level plan �→ cache, this feature reduces SQL compilation time by caching more �→ execution plans possibility of execution plan mutations, and maintains stable cluster performance. Compared with session-level ex- ecution plan cache, instance-level execution plan cache offers the following advantages: to move identified runaway queries to this group. Meanwhile, subsequent queries within the same session will continue to execute in the original resource group. By switching resource groups, you can manage

cache allows all sessions within the same TiDB �→ instance to share the plan cache. Compared with session-level plan �→ cache, this feature reduces SQL compilation time by caching more �→ execution plans possibility of execution plan mutations, and maintains stable cluster performance. Compared with session-level ex- ecution plan cache, instance-level execution plan cache offers the following advantages: to move identified runaway queries to this group. Meanwhile, subsequent queries within the same session will continue to execute in the original resource group. By switching resource groups, you can manage