In a stateful session bean, the instance variables represent the state of a unique client/bean session. Because the client interacts (“talks”) with its bean, this state is often called the conversational state. As its name suggests, a session bean is similar to an interactive session. A ...
Stateful Session Beans The state of an object consists of the values of its instance variables. In astatefulsession bean, the instance variables represent the state of a unique client-bean session. Because the client interacts (“talks”) with its bean, this state is often called the...
因此通常来说,一个使用者会有一个相对应的 Stateful Session Bean 的实体 (Instance 注一 ) ,换言之,当使用者呼叫某个 Stateful Session Bean 的两个 methods 的时候,EJB Container( 注一 ) 会清楚的知道
<remote>examples.ejb20.basic.statefulSession.Trader</remote> <ejb-class>examples.ejb20.basic.statefulSession.TraderBean</ejb-class> <session-type>Stateful</session-type> <transaction-type>Container</transaction-type> <env-entry> <env-entry-name>BEAS</env-entry-name> <env-entry-type>java.lang....
If you do not specify it, the stateful bean instances will not be passivated. They will be active until the session timeout expires or until the client ends the session (calls a remove method from the bean’s home or component interface). The EJB Container uses an LRU algorithm when it ...
The product uses the functions of the Data Replication Service (DRS) and Workload Management (WLM) so you can enable stateful session bean failover. Because you might not want to enable failover for every stateful session bean that is installed in the Enterprise JavaBeans (EJB) container, ...
虽然说,http协议本身是stateless的,但是很多web 应用却是stateful的,因为web应用保存了用户的session信息,这样对登陆之前和登陆之后用户请求的处理是不同的。但是,对于很多web api service来讲,可能就是stateless的,因为其不需要用户登陆,而只需要用户提供验证的credentials,对多次请求的处理逻辑是一样的。
Number of beans that are in the passive state. Methods inherited from interface javax.management.j2ee.statistics.SessionBeanStats getMethodReadyCount Methods inherited from interface javax.management.j2ee.statistics.EJBStats getCreateCount, getRemoveCount Methods in...
Each Enterprise JavaBeans (EJB) container provides a method for stateful session beans to fail over to other servers. Use this method to specify whether failover occurs for the stateful session beans in this application. You can also override the stateful session bean failover settings on a ...
有状态就是有数据存储功能。有状态对象(Stateful Bean),就是有实例变量的对象,可以保存数据,是非线程安全的。在不同方法调用间不保留任何状态。 无状态就是一次操作,不能保存数据。无状态对象(Stateless Bean),就是没有实例变量的对象.不能保存数据,是不变类,是线程安全的。