flow_control

查看中文版本

Method Level Flow Control

Introduction

There is a config of flow control in runtime_config.json:

[
    {
        "type": "flowControlFilter",
        "config": {
            "global_switch": true,
            "limit_key_type": "PATH",
            "rules": [
                {
                    "resource": "/spec.proto.runtime.v1.Runtime/SayHello",
                    "grade": 1,
                    "threshold": 5
                }
            ]
        }
    }
]

this can help /spec.proto.runtime.v1.Runtime/SayHello method has a flow control feature, which means we can only access this method below 5 times in 1 second.

this code of the client is here client.go，the logic is very simple, send 10 times request to the server，and the result is below:

the previous 5 times request access is succeed while the last 5 times request is under control.

Configuration Description

config:

field_name	field_type	desc
global_switch	boolean	switch of this feature, true is open, false is close
limit_key_type	String	Unique identifier，Currently a fixed value PATH
rules	Array	rules of flow control

rules of flow control:

field_name	field_type	desc
resource	String	limit resource identification，here is the method URL
grade	int	Threshold update cycle，unit:second
threshold	int	be limited if exceed this threshold