谷歌云消息生存时间 [英] Google cloud messaging time to live
问题描述
我是开发其采用GCM的Android应用程序,但我想取消的消息传递,如果用户的手机不在线。有没有什么办法,以减少生存时间价值最小?
我找到了答案@的 http://developer.android.com/google/gcm/adv.html
指定过期日期的消息的另一个优点是
0的time_to_live值GCM永远不会油门的邮件
秒。换句话说,GCM将保证消息尽力而为
必须交付机不可失,时不再来。请记住,一个
0 time_to_live值表示无法传递的消息
立即将被丢弃。然而,因为这样的消息是
不被存储,这提供了最佳的延迟发送
通知。
下面是一个JSON格式的请求的例子,包括TTL:
块引用>{
collapse_key的:演示,
delay_while_idle:真实,
registration_ids:XYZ]
数据:{
KEY1:值1
KEY2:VALUE2
},
time_to_live:3
},I was developing android application which uses GCM, but I want to cancel message delivery if user phone is not online. Is there any way to decrease time to live value to minimum?
解决方案I found an answer @ http://developer.android.com/google/gcm/adv.html
Another advantage of specifying the expiration date for a message is that GCM will never throttle messages with a time_to_live value of 0 seconds. In other words, GCM will guarantee best effort for messages that must be delivered "now or never." Keep in mind that a time_to_live value of 0 means messages that can't be delivered immediately will be discarded. However, because such messages are never stored, this provides the best latency for sending notifications.
Here is an example of a JSON-formatted request that includes TTL:
{ "collapse_key" : "demo", "delay_while_idle" : true, "registration_ids" : ["xyz"], "data" : { "key1" : "value1", "key2" : "value2", }, "time_to_live" : 3 },
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