GAE/J - Appstats(測量App的效能)

Appstats主要是用來測量App在Google App Engine上的效能表現。做法很簡單只要掛上Google提供的Appstats的Filter即可使用。

• 在web.xml中加入

<filter>
        <filter-name>appstats</filter-name>
        <filter-class>com.google.appengine.tools.appstats.AppstatsFilter</filter-class>
        <init-param>
            <param-name>logMessage</param-name>
            <param-value>Appstats available: /appstats/details?time={ID}</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>appstats</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

• 連線到http://xxx.appspot.com/appstats/

• 限制只有管理者可以連線，需在web.xml加入以下的code

<servlet>
        <servlet-name>appstats</servlet-name>
        <servlet-class>com.google.appengine.tools.appstats.AppstatsServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>appstats</servlet-name>
        <url-pattern>/appstats/*</url-pattern>
    </servlet-mapping>

    <security-constraint>
        <web-resource-collection>
            <url-pattern>/appstats/*</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <role-name>admin</role-name>
        </auth-constraint>
    </security-constraint>