Ability to set expiry for memcache values

[jakearchibald]

Seems like the python client can do this https://cloud.google.com/appengine/docs/python/memcache/clientclass#Client_set

[hbizira]

+1

[thomasbuchis]

+1,

reading the code, the lib api includes support to expiration, but the mapper not. I think that the only thing needed is in lib/index.js change to -->
/**

• Return a memcache set request proto.
  *
• @param {!string} key key of the item to set
• @param {!string} value value of the item to set
• @param {!number} expiration in seconds of the item to set
• @return {apphosting.MemcacheSetRequest} a memcache set request proto
  */
  function makeMemcacheSetProto(key, value, expiration) {
  var memcacheSetRequest = new apphosting.MemcacheSetRequest();
  var item = new apphosting.MemcacheSetRequest.Item();
  item.setKey(key);
  item.setValue(value);
  if(expiration)
  item.setExpiresInSeconds(expiration)
  item.setSetPolicy(apphosting.MemcacheSetRequest.SetPolicy.SET);
  memcacheSetRequest.addItem(item);
  return memcacheSetRequest;
  }