Builder模式

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直接上代码

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/**
 * 告警责任链
 *
 * @author hubo
 * @since 2017-06-29 18:53
 **/
public abstract class AlarmHandler {
    protected AlarmHandler nextAlarmHandler;
    protected AlarmHandler getNextAlarmHandler() {
        return nextAlarmHandler;
    }
}
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/**
 * 客服链对象
 * 5分钟时间客服不回复访客消息则提示客服
 *
 * @author hubo
 * @since 2017-06-29 18:57
 **/
public class AlarmToCustomer extends AlarmHandler {
    public AlarmToCustomer(Builder builder) {
        this.nextAlarmHandler = builder.nextHandler;
    }
    public static class Builder {
        private AlarmHandler nextHandler;
        public Builder() {
        }
        public Builder(AlarmHandler nextHandler) {
            this.nextHandler = nextHandler;
        }
        public Builder nextHandler(AlarmHandler nextHandler) {
            this.nextHandler = nextHandler;
            return this;
        }
        public AlarmToCustomer build() {
            return new AlarmToCustomer(this);
        }
    }
}
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/**
 * Boss告警链
 * 15分钟时间客服不回复访客消息通知Boss
 *
 * @author hubo
 * @since 2017-06-29 18:57
 **/
public class AlarmToBoss extends AlarmHandler {
    public AlarmToBoss(Builder builder) {
        this.nextAlarmHandler = builder.nextHandler;
    }
    public static class Builder {
        private AlarmHandler nextHandler;
        public Builder() {
        }
        public Builder nextHandler(AlarmHandler nextHandler) {
            this.nextHandler = nextHandler;
            return this;
        }
        public AlarmToBoss build() {
            return new AlarmToBoss(this);
        }
    }
}
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/**
 * 销毁任务对象链
 * 超过30分钟时间客服不回复访客清除任务
 *
 * @author hubo
 * @since 2017-06-29 18:57
 **/
public class AlarmToDestroy extends AlarmHandler {
    public AlarmToDestroy() {
    }
}

应用

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//组合应用
AlarmToDestroy destroy = new AlarmToDestroy();
AlarmToBoss boss = new AlarmToBoss.Builder().nextHandler(destroy).build();
AlarmToCustomer customer = new AlarmToCustomer.Builder().nextHandler(boss).build();