ActionAfter

介绍

本篇介绍如何扩展 ActionAfter 接口，将异常信息携带到请求端。

业务框架的异常机制，默认只保存错误码，不会保存错误码对应的异常信息。 如果想把异常信息携带到请求端，可以通过扩展 ActionAfter 来实现。

public class DebugActionAfter implements ActionAfter {
    ActionAfter actionAfter = new DefaultActionAfter();

    @Override
    public void execute(final FlowContext flowContext) {
        final ResponseMessage response = flowContext.getResponse();
        if (response.hasError()) {
            // get error info. cn: 得到异常消息
            String msg = flowContext.option(FlowAttr.msgException);
            // carry exception information to the requesting end.
            // cn: 将异常信息携带到请求端
            response.setValidatorMsg(msg);
        }

        actionAfter.execute(flowContext);
    }
}

public class YourLogicServer extends AbstractBrokerClientStartup {
    @Override
    public BarSkeleton createBarSkeleton() {
        BarSkeletonBuilder builder = ...

        // setting ActionAfter
        builder.setActionAfter(new DebugActionAfter());
        return builder.build();
    }
}