英文:
Store an object in memcache of GAE in Go
问题
我想使用Go将一个对象存储在GAE的内存缓存中。GAE文档只展示了如何存储[]byte类型的对象，链接在这里：https://developers.google.com/appengine/docs/go/memcache/overview
当然，有一般的方法可以将对象序列化为[]byte，通过这种方式可以完成我的任务。但是通过阅读内存缓存参考文档，我发现在memcache Item中有一个"Object"：
// Object是Item的值，用于与编解码器一起使用。
Object interface{}
这似乎是一个内置的机制，用于在内存缓存中存储对象。然而，GAE文档没有提供示例代码。
请问有人可以给我一个示例吗？提前感谢。
英文:
I want to store an object in GAE's memcache using Go. The gae documentation only shows how to store a []byte here: https://developers.google.com/appengine/docs/go/memcache/overview
Of course there are general ways to serialize an object into []byte, by which my task could be accomplished. But by reading the memcache reference, I found there is an "Object" in the memcache Item:
// Object is the Item's value for use with a Codec.
Object interface{}
That seems to be a built-in mechanic to store an object in memcache. However, the gae documentation did not provide a sample code.
Could anyone please show me an example? Thanks in advance
答案1
得分: 27
好的，我刚刚自己弄清楚了。memcache包有两个内置的编解码器：gob和json。只需使用其中一个（当然也可以创建自己的编解码器）：
var in, out struct {I int;}
// 将in放入memcache
in.I = 100
item := &memcache.Item {
Key: "TestKey",
Object: in,
}
memcache.Gob.Set(c, item) // 省略了错误检查以方便演示
// 检索值
memcache.Gob.Get(c, "TestKey", &out)
fmt.Fprint(w, out) // 将打印{100}
谢谢大家。
英文:
OK, I just figured it out my self. The memcache pkg has two built-in Codec: gob and json. Just use one of them (or of course one can create his own Codec):
var in, out struct {I int;}
// Put in into memcache
in.I = 100
item := &memcache.Item {
Key: "TestKey",
Object: in,
}
memcache.Gob.Set(c, item) // error checking omitted for convenience
// retrieve the value
memcache.Gob.Get(c, "TestKey", &out)
fmt.Fprint(w, out) // will print {100}
Thanks all
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