我在我的项目中使用pubnub并订阅了一个频道,在我的订阅者中我更新了我的数据库。 我正在这样的初始化文件中完成所有这些工作
$callback_location = (lambda do |envelop|
begin
case envelop.channel
when "iwm_driver_locations"
last_location = LatLong.where(driver_id: envelop.message['driver_id']).last
if last_location.lat != envelop.message['lng'] and last_location.lng != envelop.message['lat']
l = LatLong.create!(
lat: envelop.message['lat'],
lng: envelop.message['lng'],
driver_id: envelop.message['driver_id']
)
end
when "iwm_chat"
m = Message.create!(
:author => envelop.message,
:message => envelop.message,
:timetoken => envelop.timetoken
)
end
rescue Exception => e
Rails.logger.info "****** Exception: #{e}"
end
end)
$pubnub.subscribe(
:channel => ['iwm_chat', 'iwm_driver_locations'],
:callback => $callback_location
) unless $pubnub.subscription_running?
但我的订阅者在某些尝试中抛出异常 ConnectionNotEstablished 。但是,有时这段代码会毫无问题地执行。
我试图增加数据库超时和池,但同样的问题仍然存在。 知道我做错了吗?
答案 0 :(得分:1)
尝试在ActiveRecord::Base.establish_connection
之前添加$pubnub.subscribe
。它应该有所帮助。