Chapter 2

浪人

Server的启动
AbstractLifeCycle类实现了LifeCycle接口(start(), stop())，并提供了doStart()和doStop()方法

public final void start() throws Exception
{
synchronized (_lock)
{
try
{
if (_state == STARTED || _state == STARTING)
return;
setStarting();
doStart();
setStarted();
}
// code omitted
}
}


AbstractLifeCycle的子类需要重写doStart()和doStop()方法，如Server类：

protected void doStart() throws Exception
{
for (int i=0;_realms !=null && i<_realms.length; i++)
{
if (_realms instanceof LifeCycle)
((LifeCycle)_realms).start(); // 启动realms
}
Iterator itor = _dependentLifeCycles.iterator();
while (itor.hasNext())
{   
try
{
((LifeCycle)itor.next()).start(); // 启动依赖组件
}
catch (Throwable e) {mex.add(e);}
}
if (_threadPool==null)
{
QueuedThreadPool tp=new QueuedThreadPool();
setThreadPool(tp); // 设置线程池
}
if (_sessionIdManager!=null)
_sessionIdManager.start(); // 启动会话ID管理器
try
{
if (_threadPool instanceof LifeCycle)
((LifeCycle)_threadPool).start(); // 启动线程池
}
catch(Throwable e) { mex.add(e);}
try
{
super.doStart();
}
catch(Throwable e)
{
Log.warn("Error starting handlers",e);
}
if (_connectors!=null)
{
for (int i=0;i<_connectors.length;i++)
{
try{_connectors.start();} // 启动连接器
catch(Throwable e)
{
mex.add(e);
}
}
}
mex.ifExceptionThrow();
}