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Add TCP driver alongiside UDP one#124
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I believe this PR should also contain documentation changes indicating that you can use it alongside with Telegraf instance, but I'm holding until one of maintainers says that it's a worthy addition :) |
Steveb-p
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Feb 27, 2019
| */ | ||
| protected function doWrite($data) | ||
| { | ||
| $this->result = false !== @fwrite($this->stream, "$data\n"); |
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An issue can occur when multiple messages are written into TCP socket:
telegraf_1_279d9d02c69e | 2019-02-27T10:54:58Z E! [inputs.socket_listener]: Error in plugin: unable to parse incoming line: metric parse error: expected field at offset 49: "xxx,tag=tag_value parsed=0i,processing_time=85.6xxx,tag=tag_value parsed=0i...
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In my project I'm using
influxdb-phpto communicate to an InfluxDB database instance via a Telegraf instance. Since Telegraf exposes a handySocket Listenerplugin (https://docs.influxdata.com/telegraf/v1.9/plugins/inputs/#socket-listener) I decided to use UDP driver, but I found it only works with (obviously) UDP protocol. Socket Listener does support it, but I wanted to be sure in particular cases that message gets through.Reasoning for usage of Telegraf in my case is that I can aggregate writes in it, reducing the amount of messages between application and InfluxDB instance. Also it does send messages in regular intervals in batches, so I don't really need to group messages myself.
It uses InfluxDB's "Line protocol" for messages, so one can either write directly to InfluxDB's UDP socket, or use Telegraf's Socket Listener.
This PR introduces
TCPclass similar toUDPone and puts common code intoAbstractSocketDriver. Since I'm no particular expert in socket php functions, I'll welcome any criticism :)