Disruptor技術調研之配置ExceptionHandler

一、舉例：handleExceptionsWith設置

disruptor.handleExceptionsWith(exceptionHandler);
disruptor.handleEventsWith(handler);

二、舉例：handleExceptionsWith方式設置須要在handler註冊前設置

disruptor.handleExceptionsWith(exceptionHandler);
disruptor.handleEventsWith(handler);
disruptor.handleExceptionsWith(new FatalExceptionHandler());

註冊handler時，經過獲取Disruptor上下文中已經設置的exceptionHandler --->>

if (exceptionHandler != null)
{
    batchEventProcessor.setExceptionHandler(exceptionHandler);
}

三、舉例：推薦使用setDefaultExceptionHandler方法設置exceptionHandler

disruptor.setDefaultExceptionHandler(exceptionHandler);
disruptor.handleEventsWith(handler);

--->>

private ExceptionHandler<? super T> exceptionHandler = new ExceptionHandlerWrapper<T>();

--->>

private ExceptionHandler<? super T> delegate = new FatalExceptionHandler();

public void switchTo(final ExceptionHandler<? super T> exceptionHandler)
{
    this.delegate = exceptionHandler;
}

四、舉例：setDefaultExceptionHandler不一樣於handleExceptionsWith方法能夠在handler註冊後設置，緣由是從新設置的exceptionHandler代理，見上述代碼

disruptor.handleEventsWith(handler);
disruptor.setDefaultExceptionHandler(exceptionHandler);

五、舉例：靈活設置

disruptor.handleEventsWith(eventHandler);

disruptor.handleExceptionsFor(eventHandler).with(exceptionHandler);

--->>

com.lmax.disruptor.dsl.ExceptionHandlerSetting<T> A support class used as part of setting an exception handler for a specific event handler. For example: disruptorWizard.handleExceptionsIn(eventHandler).with(exceptionHandler); Type Parameters: <T> the type of event being handled.