推荐订阅源

java:

public class JForumExecutionContext
{
    private static ThreadLocal userData = new ThreadLocal(); /**
     * Gets the execution context.
     * @return JForumExecutionContext
     */
    public static JForumExecutionContext get()
    {
        JForumExecutionContext ex = (JForumExecutionContext)userData.get();

        if (ex == null) {
            ex = new JForumExecutionContext();
            userData.set(ex);
        }
        
        return ex;
    }
    
    /**
     * Checks if there is an execution context already set
     * @return <code>true</code> if there is an execution context
     * @see #get()
     */
    public static boolean exists()
    {
        return (userData.get() != null);
    }   

}

 C#:　　

[ThreadStatic]
private static Object StaticObject = new Object();