import com.ullink.slack.simpleslackapi.listeners.SlackMessagePostedListener; //导入依赖的package包/类
private SlackMessagePostedListener buildSlackMessagePostedListener() {

        return (event, session) -> {

                if (isNotInstantMessaging(event)) {

                    return;
                }

                String message = event.getMessageContent();
                SlackUser slackUser = event.getSender();

            try {

                pomodoroCommandFactory.getCommand(message)
                        .execute(slackUser, message);
            } catch (GenericCommandException e) {

                // TODO We need to send the content of the error + the content of the help command
            }
            };
    }
 

import com.ullink.slack.simpleslackapi.listeners.SlackMessagePostedListener; //导入依赖的package包/类
public synchronized void setMessagePostedListener(SlackMessagePostedListener listener) {
    session.addMessagePostedListener(listener);
}
 

import com.ullink.slack.simpleslackapi.listeners.SlackMessagePostedListener; //导入依赖的package包/类
void addMessagePostedListener(SlackMessagePostedListener listener); 

import com.ullink.slack.simpleslackapi.listeners.SlackMessagePostedListener; //导入依赖的package包/类
void removeMessagePostedListener(SlackMessagePostedListener listener);