Question

The following example of use the sent methods provided by the grails letter plugin listed in this book 。

sendMail {
    to "foo@example.org"
    subject "Registration Complete"
    body view:"/foo/bar", model:[user:new User()]
}

I understand that the code within {} is a closure that is passed to sendMail as a parameter. I also understand that to, subject and body are method calls.

我试图说明实施发送邮件方法的守则所希望的是什么,而我最好的猜测就是这样:

MailService {

    String subject
    String recipient
    String view
    def model

    sendMail(closure) {
        closure.call()
        // Code to send the mail now that all the 
        // various properties have been set
    }

    to(recipient) {
        this.recipient = recipient
    }

    subject(subject) {
        this.subject = subject;
    }

    body(view, model) {
        this.view = view
        this.model = model
    }
}

这是否合理,或者我是否失踪? 尤其是,在关闭时使用的方法(to,subject,one),必然是同sendmail相同的类别成员?

Thanks, Don

Answer 1

邮电处关闭邮件,授权:

 MailMessage sendMail(Closure callable) {
    def messageBuilder = new MailMessageBuilder(this, mailSender)
    callable.delegate = messageBuilder
    callable.resolveStrategy = Closure.DELEGATE_FIRST
    callable.call()

    def message = messageBuilder.createMessage()
    initMessage(message)
    sendMail message
    return message
}

举例来说,邮寄方式:

void to(recip) {
    if(recip) {
        if (ConfigurationHolder.config.grails.mail.overrideAddress)
            recip = ConfigurationHolder.config.grails.mail.overrideAddress
        getMessage().setTo([recip.toString()] as String[])
    }
}

Answer 2

我不敢肯定发送邮件的方法是什么,因为我没有提及这本书。发送邮件的方法的确像你所描述的那样是封闭的,但可能使用 builder ,而不是正常执行。基本上,这是描述拟发送的电子邮件的具体内容。

你所定义的类别不可行的原因是,封锁的范围是宣布的,而不是在什么地方。因此,如果你把关闭称为“()”方法,那么,除非你把邮件服务通过到关闭时,否则就无法在邮局上调。

With a few modifications, your example could work though using a regular closure. The following changes to the call and

// The it-> can be omitted but I put it in here so you can see the parameter
service.sendMail {it->
    it.to "foo@example.org"
    it.subject "Registration Complete"
    it.body view:"/foo/bar", model:[user:new User()]
}

班级的派任方法应当照此办理。

def sendMail(closure) {
    closure(this)
    // Code to send the mail now that all the 
    // various properties have been set
}

友情链接