标签：tomcat servlet hashmap standardcontext standardcontextvalve
在tomcat4中,StandardContext.java是最大的一个类,有117k。废话不说,开始分析吧。public class SimpleContextConfig implements LifecycleListener {
public void lifecycleEvent(LifecycleEvent event) {
if (Lifecycle.START_EVENT.equals(event.getType())) {
Context context = (Context) event.getLifecycle();
context.setConfigured(true);
}
}
}在StandardContext配置完成后调用 setAvailable(false);
setConfigured(false);3 配置资源 (这部分我也不是太懂) ((Lifecycle) loader).start();
((Lifecycle) logger).start();
((Lifecycle) mappers[i]).start();8 启动子容器 Container children[] = findChildren();
for (int i = 0; i < children.length; i++) {
if (children[i] instanceof Lifecycle)
((Lifecycle) children[i]).start();
}9 启动管道 if (pipeline instanceof Lifecycle)
((Lifecycle) pipeline).start();10 触发START_EVENT,注意呀 观察者模式,SimpleContextConfig, configured会被设置为true // Notify our interested LifecycleListeners
// 会调用SimpleContextConfig的lifecycleEvent
lifecycle.fireLifecycleEvent(START_EVENT, null);11 启动session //session部分
if ((manager != null) && (manager instanceof Lifecycle))
((Lifecycle) manager).start();12 (书上说)检查confired的值,postWelcomeFiles会载入需要提前载入的子容器,StandardContext的子容器能有什么?StandardWrapper呗。 if (!getConfigured())
ok = false;
if (ok) {
postWelcomeFiles();
}问题是加载需要提前载入的子容器是 if (ok) {
setAvailable(true);
} else {
try {
stop();
} catch (Throwable t) {
log(sm.getString("standardContext.startCleanup"), t);
}
setAvailable(false);
} stop里面具体的代码就不说了。 while (getPaused()) { //getPaused如果返回true 就说明正在重载
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
;
}
}然后调用父类,也就是ContainerBase的invoke Context context = (Context) getContainer();
wrapper = (Wrapper) context.map(request, true);接着在ContainerBase的map中先获得相应协议(http还是https)的映射器,再用映射器的map方法根据request的uri获得Wrapper。addDefaultMapper(this.mapperClass); //private String mapperClass = "org.apache.catalina.core.StandardContextMapper";StandardContext会调用父类的addDefaultMapper。这里面,默认的协议是http
Class<?> clazz = Class.forName(mapperClass);
Mapper mapper = (Mapper) clazz.newInstance();
mapper.setProtocol("http");
addMapper(mapper);在addMapper中How tomcat works 读书笔记十二 StandardContext 上
标签：tomcat servlet hashmap standardcontext standardcontextvalve
原文地址：http://blog.csdn.net/dlf123321/article/details/41380081
