秒殺Servlce接口設計
一、建立service包，建立SecKillServlce業務接口java
SecKillServlce.Javaide
| package org.secKill.service;
/*
* 業務接口：站在「開發者」的角度設計接口
* 三個方面：方法定義粒度，參數，返回類型（return 類型/異常）*/
import org.secKill.dto.Exposer;
import org.secKill.dto.SecKillExecution;
import org.secKill.entity.SecKill;
import org.secKill.exception.RepeatKillException;
import org.secKill.exception.SecKillCloseException;
import org.secKill.exception.SecKillException;
import java.util.List;
/**
* Created by 譚雪嬌 on 2017/5/5.
*/
public interface SecKillService {
/*
* 查詢全部秒殺記錄
* @return
* */
List<SecKill> getSecKillList();
/*
* c查詢單個秒殺記錄
* @Param SecKillId
* @return
* */
SecKill getById(long secKillId);
/*
* 秒殺開啓時輸出秒殺接口地址，
* 不然輸出系統時間
* @param secKillId
* */
Exposer exportSecKillUrl(long secKillId);
/*
* 執行秒殺操做
* @param secKillId
* @param userPhone
* @param md5*/
SecKillExecution executeZSecKill(long secKillId, long userPhone, String md5) throws SecKillException,RepeatKillException,SecKillCloseException;
}this |
創建dto包，建立暴露秒殺接口dto（數據傳輸層）加密
Exposer.javaspa
| package org.secKill.dto;
/**
* Created by 譚雪嬌 on 2017/5/5.
* 暴露秒殺接口DTO
*/
public class Exposer {
//是否開啓秒殺
private boolean exposed;
//一種加密措施
private String md5;
//id
private long secKillId;
//開始時間
private long start;
//結束時間
private long end;
public Exposer(boolean exposed, String md5, long secKillId) {
this.exposed = exposed;
this.md5 = md5;
this.secKillId = secKillId;
}
public Exposer(boolean exposed, String md5, long start, long secKillId, long end) {
this.exposed = exposed;
this.md5 = md5;
this.start = start;
this.secKillId = secKillId;
this.end = end;
}
public Exposer(boolean exposed, long secKillId) {
this.exposed = exposed;
this.secKillId = secKillId;
}
public boolean isExposed() {
return exposed;
}
public void setExposed(boolean exposed) {
this.exposed = exposed;
}
public String getMd5() {
return md5;
}
public void setMd5(String md5) {
this.md5 = md5;
}
public long getSecKillId() {
return secKillId;
}
public void setSecKillId(long secKillId) {
this.secKillId = secKillId;
}
public long getStart() {
return start;
}
public void setStart(long start) {
this.start = start;
}
public long getEnd() {
return end;
}
public void setEnd(long end) {
this.end = end;
}
@Override
public String toString() {
return "Exposer{" +
"exposed=" + exposed +
", md5='" + md5 + '\'' +
", secKillId=" + secKillId +
", start=" + start +
", end=" + end +
'}';
}
}設計 |
建立包enums，建立枚舉類型SecKillStateEnum.java使用枚舉表述數據常量字典對象
SecKillStateEnum.java繼承
| package org.secKill.enums;
/**
* 使用枚舉表述常量數據字典
*
* @author yan
*/
public enum SecKillStateEnum {
SUCCESS(1, "秒殺成功"), END(0, "秒殺結束"),
REPEAT_KILL(-1, "重複秒殺"),
INNER_ERROR(-2, "系統異常"),
DATA_REWRITE(-3, "數據篡改");
private int state;
private String stateInfo;
private SecKillStateEnum(int state, String stateInfo) {
this.state = state;
this.stateInfo = stateInfo;
}
public int getState() {
return state;
}
public String getStateInfo() {
return stateInfo;
}
public static SecKillStateEnum stateOf(int index) {
for (SecKillStateEnum state : values()) {
if (state.getState() == index) {
return state;
}
}
return null;
}
}接口 |
在dto包內建立封裝秒殺執行後結果類SecKillExecution.javamd5
| package org.secKill.dto;
import org.secKill.entity.SuccessKilled;
import org.secKill.enums.SecKillStateEnum;
/**
* Created by 譚雪嬌 on 2017/5/5.
* 封裝秒殺執行後結果
*/
public class SecKillExecution {
private long secKillId;
//秒殺執行結果狀態
private int state;
//狀態標識
private String stateInfo;
//秒殺成功對象
private SuccessKilled successKilled;
public SecKillExecution(long secKillId, SecKillStateEnum stateEnum , SuccessKilled successKilled) {
this.secKillId = secKillId;
this.state = stateEnum.getState();
this.stateInfo=stateEnum.getStateInfo();
this.successKilled=successKilled;
}
public SecKillExecution(long secKillId,SecKillStateEnum stateEnum) {
this.secKillId = secKillId;
this.state =stateEnum.getState();
this.stateInfo = stateEnum.getStateInfo();
}
public long getSecKillId() {
return secKillId;
}
public void setSecKillId(long secKillId) {
this.secKillId = secKillId;
}
public int getState() {
return state;
}
public void setState(int state) {
this.state = state;
}
public String getStateInfo() {
return stateInfo;
}
public void setStateInfo(String stateInfo) {
this.stateInfo = stateInfo;
}
public SuccessKilled getSuccessKilled() {
return successKilled;
}
public void setSuccessKilled(SuccessKilled successKilled) {
this.successKilled = successKilled;
}
} |
建立包exception建立三個異常
建立SecKillException.java 秒殺執行異常
| package org.secKill.exception;
/**
* Created by 譚雪嬌 on 2017/5/5.
*/
public class SecKillException extends RuntimeException{
public SecKillException(String message){super(message);}
public SecKillException(String message,Throwable cause){super(message,cause);}
} |
重複秒殺異常RepeatKillException.繼承SecKillException.java
| package org.secKill.exception;
import org.secKill.dto.SecKillExecution;
import org.secKill.entity.SuccessKilled;
import org.secKill.enums.SecKillStateEnum;
/**
* Created by 譚雪嬌 on 2017/5/5.
*/
public class RepeatKillException extends SecKillException{
public RepeatKillException(String message) {
super(message);
}
public RepeatKillException(String message, Throwable cause) {
super(message, cause);
}
} |
建立SecKillException.java,表示秒殺關閉異常
| package org.secKill.exception;
/**
* Created by 譚雪嬌 on 2017/5/5.
* 秒殺關閉異常
*/
public class SecKillCloseException extends SecKillException {
public SecKillCloseException(String message) {
super(message);
}
public SecKillCloseException(String message, Throwable cause) {
super(message, cause); }} |