How Tomcat Works

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• A loader does not do the reloading itself, however. Instead, it calls the Context interface's reload method. By default, in the standard implementation of Context (the org.apache.catalina.core.StandardContext class, which is discussed in Chapter 12), reloading is not enabled. Therefore, to enable reloading of a context, you need to add a Context element for that context in your server.xml file, such as the following: <Context path="/myApp" docBase="myApp" debug="0" reloadable="true"/> (查看原文)

  eddyzhou 2011-01-27 15:21:21

• If a servlet implements this interface, you are guaranteed that no two threads will execute concurrently in a servlet's service method. The servlet container can guarantee this by synchronizing access to a single instance of the servlet, or by maintaining a pool of servlet instances and dispatching each new request to a free servlet. This interface does not prevent synchronization problems that result from servlets accessing shared resources such as static class variables or classes outside the scope of the servlet. It is true that by implementing SingleThreadModel no two threads will execute a servlet's service method at the same time. However, to enhance performance the servlet container can create multiple instances of an STM servlet. That means, the STM servlet's service method can be ... (查看原文)

  eddyzhou 2011-02-13 15:17:07

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