所以我正在重新设计我的事件系统,我希望尽可能地优化它。我把它减少到大约82毫秒才能发射100万个事件。我想问一下你有什么不同的做法,以及如何进一步优化这个?目前,当一个事件被触发到该方法时,只有一些基本的逻辑被完成,当我计划将它用于即将到来的项目时,它会更加先进,这可能会使执行时间加倍。
package me.xerces.eventbus;
import me.xerces.eventbus.annotation.EventHandler;
import me.xerces.eventbus.event.Event;
import java.lang.invoke.MethodHandle;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
public class EventManager {
private ArrayList<Map.Entry<Class, EventHandle>> eventHandlerList = new ArrayList<Map.Entry<Class, EventHandle>>();
public void addEventListener(Object object)
{
for(Method method : object.getClass().getDeclaredMethods())
{
if(method.isAnnotationPresent(EventHandler.class))
{
Map.Entry<Class, EventHandle> eventHandleEntry = new AbstractMap.SimpleEntry<Class, EventHandle>(method.getParameterTypes()[0], new EventHandle(method, object));
method.setAccessible(true);
eventHandlerList.add(eventHandleEntry);
}
}
}
public void addSpecificEventListener(Object object, Class eventClass)
{
for(Method method : object.getClass().getDeclaredMethods())
{
if(method.isAnnotationPresent(EventHandler.class) && method.getParameterTypes().length > 0 && method.getParameterTypes()[0].equals(eventClass))
{
Map.Entry<Class, EventHandle> eventHandleEntry = new AbstractMap.SimpleEntry<Class, EventHandle>(method.getParameterTypes()[0], new EventHandle(method, object));
method.setAccessible(true);
eventHandlerList.add(eventHandleEntry);
}
}
}
public void removeEventListener(Object object)
{
Iterator<Map.Entry<Class, EventHandle>> iterator = eventHandlerList.iterator();
while(iterator.hasNext())
{
Map.Entry<Class, EventHandle> entry = iterator.next();
if(entry.getValue().getMethodClass().equals(object))
iterator.remove();
}
}
public void fireEvent(Event event)
{
Iterator<Map.Entry<Class, EventHandle>> iterator = eventHandlerList.iterator();
while(iterator.hasNext())
{
Map.Entry<Class, EventHandle> entry = iterator.next();
if(entry.getKey().equals(event.getClass())) {
try {
EventHandle eventHandle = entry.getValue();
eventHandle.getMethod().invoke(eventHandle.getMethodClass(), event);
} catch (IllegalAccessException | InvocationTargetException e)
{
e.printStackTrace();
}
}
}
}
}
Github链接:https://github.com/X3rces/EventBus 编辑:当JVM将invokation转换为直接方法调用而不是使用JNI时,有没有办法加快速度?
答案 0 :(得分:1)
你可以避免
if(entry.getKey().equals(event.getClass())) {
使用
private final Map<Class<?>, List<EventHandle>> eventHandlerMap = new HashMap<>();
查看我的问题所在的EventSystem代码