@@ Cacheable无法更新

Question

在spring框架中，我们有@Cacheable来缓存数据。现在我的要求是我想使用Get方法检索所有数据表单数据库。

控制器

@RequestMapping(value = "/getUploadData", method = RequestMethod.GET)
public ResponseEntity<List<Ticket>> getUploadFileData() throws IOException {
    return new ResponseEntity<>(ticketBookingService.getFileUploadData(), HttpStatus.OK);
}

服务

@Cacheable(value="ticketsCache")
public List<Ticket> getFileUploadData() {
    List<Ticket> listOfData = (List<Ticket>) ticketBookingDao.findAll();
    return listOfData;
}

}

输出： click image here to check output

http://localhost:8080/api/tickets/getUploadData

[{"ticketId":1,"passengerName":"Sean","bookingDate":1502649000000,"sourceStation":"Pune","destStation":"Mumbai","email":"[email protected]"},{"ticketId":2,"passengerName":"Raj","bookingDate":1502476200000,"sourceStation":"Chennai","destStation":"Mumbai","email":"[email protected]"},{"ticketId":3,"passengerName":"Martin","bookingDate":1502735400000,"sourceStation":"Delhi","destStation":"Mumbai","email":"[email protected]"},{"ticketId":4,"passengerName":"John","bookingDate":1503253800000,"sourceStation":"Chennai","destStation":"Mumbai","email":"[email protected]"}]

现在我将通过票证进行获取和放置操作。

获取：控制器：

    @GetMapping(value="/ticket/{ticketId}")
public Ticket getTicketById(@PathVariable("ticketId")Integer ticketId){
    return ticketBookingService.getTicketById(ticketId);
}

服务：

    @Cacheable(value="ticketsCache",key="#ticketId",unless="#result==null")
public Ticket getTicketById(Integer ticketId) {
    return ticketBookingDao.findOne(ticketId);
}

http://localhost:8080/api/tickets/ticket/1

{“ ticketId”：1，“ passengerName”：“ Sean”，“ bookingDate”：1502649000000，“ sourceStation”：“ Pune”，“ destStation”：“ Mumbai”，“ email”：“ sean.s2017@yahoo。 com“}

现在当我使用工单ID更新电子邮件时：

放置：控制器

    @PutMapping(value="/ticket/{ticketId}/{newEmail:.+}")
public Ticket updateTicket(@PathVariable("ticketId")Integer ticketId,@PathVariable("newEmail")String newEmail){
    return ticketBookingService.updateTicket(ticketId,newEmail);
}

服务：

@CachePut(value="ticketsCache",key="#ticketId")
public Ticket updateTicket(Integer ticketId, String newEmail) {
    Ticket upadedTicket = null;
    Ticket ticketFromDb = ticketBookingDao.findOne(ticketId);
    if(ticketFromDb != null){
        ticketFromDb.setEmail(newEmail);
        upadedTicket = ticketBookingDao.save(ticketFromDb); 
    }
    return upadedTicket;
}

http://localhost:8080/api/tickets/ticket/1/[email protected]

{
"ticketId": 1,
"passengerName": "Sean",
"bookingDate": 1502649000000,
"sourceStation": "Pune",
"destStation": "Mumbai",
"email": "[email protected]"

}

现在当使用ID更改获取数据时正在更新。

http://localhost:8080/api/tickets/ticket/1

{"ticketId":1,"passengerName":"Sean","bookingDate":1502649000000,"sourceStation":"Pune","destStation":"Mumbai","email":"[email protected]"}

现在，我的问题是，如果我尝试通过使用上述第一个URL来获取所有数据，我的更改未反映出来。

http://localhost:8080/api/tickets/getUploadData

[{"ticketId":1,"passengerName":"Sean","bookingDate":1502649000000,"sourceStation":"Pune","destStation":"Mumbai","email":"[email protected]"},{"ticketId":2,"passengerName":"Raj","bookingDate":1502476200000,"sourceStation":"Chennai","destStation":"Mumbai","email":"[email protected]"},{"ticketId":3,"passengerName":"Martin","bookingDate":1502735400000,"sourceStation":"Delhi","destStation":"Mumbai","email":"[email protected]"},{"ticketId":4,"passengerName":"John","bookingDate":1503253800000,"sourceStation":"Chennai","destStation":"Mumbai","email":"[email protected]"}]

建议我如何重新解决此问题

Answer 1

您不能批量更新使用Spring的缓存。

请检查以下issue-状态为拒绝：]

感谢创建问题，但我不希望将这种额外的复杂性添加到缓存抽象中。这并不是要为您管理状态（如果允许的话，下一个逻辑步骤是我们必须使返回的列表与每个项目保持同步）。如果不这样做，我们就会前后矛盾，我们仅提供一种使用注释与缓存进行对话的方法。这不是很有帮助。

回到您的示例，这通常是二级缓存为您准备的。这不在缓存抽象的范围内。