从 HTTPResponse 闭包 Grails HTTPBuilder 向外部方法返回值答案

【问题标题】：Return value from HTTPResponse closure Grails HTTPBuilder to outer method从 HTTPResponse 闭包 Grails HTTPBuilder 向外部方法返回值
【发布时间】：2013-08-23 21:43:53
【问题描述】：

我有一些这样的代码

def lookupTickets() {
    User currentUser = webAuthService.currentUser()
    def http = new HTTPBuilder(zdURL)
    http.auth.basic("${zdUser}/token", zdApiKey)
    http.get(path: "/api/v2/users/search.json", 
             query: [query: currentUser.emailAddress], 
             requestContentType: ContentType.JSON, { resp, json ->
              println "Response status: ${resp.statusLine}"
                  def zenDeskUserId = json?.users[0]?.id
    })
    return MYRESULT
}

def zenDeskUserId = json?.users[0]?.id 行给出了我希望返回浏览器的结果。

当它只在内部闭包的范围内时，如何在外部方法中返回这个值？

【问题讨论】：

标签： grails closures grails-controller httpbuilder

【解决方案1】：

你认为这行不通吗？

def lookupTickets() {
    def zenDeskUserId

    User currentUser = webAuthService.currentUser()
    def http = new HTTPBuilder(zdURL)
    http.auth.basic("${zdUser}/token", zdApiKey)
    http.get(path: "/api/v2/users/search.json", 
             query: [query: currentUser.emailAddress], 
             requestContentType: ContentType.JSON, { resp, json ->

                 println "Response status: ${resp.statusLine}"
                 zenDeskUserId = json?.users[0]?.id
    })
    return zenDeskUserId
}

【讨论】：

我在想回调/关闭会异步发生。这行得通。