Statup Example Plugin

Since Statup is built in Go Language we can use the Go Plugin feature to create dynamic plugins that run on load. Statup has an event anytime anything happens, you can create your own plugins and do any type of function. To implement your own ideas into Statup, use the plugin using the statup/plugin package.

go get github.com/hunterlong/statup/plugin

Building Plugins

Plugins don't need a push request and they can be private! You'll need to compile your plugin to the Golang .so binary format. Once you've built your plugin, insert it into the plugins folder in your Statup directory and reboot the application. Clone the Example Statup Plugin repo and try to build it yourself!

Build Requirements

• You must have main.go
• You must create the Plugin variable on init()

git clone https://github.com/hunterlong/statup_plugin
cd statup-plugin
go build -buildmode=plugin -o example.so

Insert example.so into the plugins directory and reload Statup

Testing Statup Plugins

Statup includes a couple tools to help you on your Plugin journey, you can use statup test plugins command to test all plugins in your /plugins folder. This test will attempt to parse your plugin details, and then it will send events for your plugin to be fired.

statup test plugins

Your plugin should be able to parse and receive events before distributing it. The test tools creates a temporary database (SQLite) that your plugin can interact with. Statup uses upper.io/db.v3 for database interactions. The database is passed to your plugin OnLoad(db sqlbuilder.Database), so you can use the db variable passed here.

Statup Plugin Interface

Please remember Golang plugin's are very new and Statup plugin package may change and 'could' brake your plugin. Checkout the statup/plugin package to see the most current interfaces.

type PluginActions interface {
	GetInfo() Info
	GetForm() string
	SetInfo(map[string]interface{}) Info
	Routes() []Routing
	OnSave(map[string]interface{})
	OnFailure(map[string]interface{})
	OnSuccess(map[string]interface{})
	OnSettingsSaved(map[string]interface{})
	OnNewUser(map[string]interface{})
	OnNewService(map[string]interface{})
	OnUpdatedService(map[string]interface{})
	OnDeletedService(map[string]interface{})
	OnInstall(map[string]interface{})
	OnUninstall(map[string]interface{})
	OnBeforeRequest(map[string]interface{})
	OnAfterRequest(map[string]interface{})
	OnShutdown()
	OnLoad(sqlbuilder.Database)
}

Event Parameters

All event interfaces for the Statup Plugin will return a map[string]interface{} type, this is because the plugin package will most likely update and change in the future, but using this type will allow your plugin to continue even after updates.

Example of an Event

Knowing what happens during an event is important for your plugin. For example, lets have an event that echo something when a service has a Failure status being issued. Checkout some example below to see how this golang plugin action works.

func (p pkg) OnSuccess(data map[string]interface{}) {
    fmt.Println("Statup Example Plugin received a successful service hit! ")
    fmt.Println("Name:    ", data["Name"])
    fmt.Println("Domain:  ", data["Domain"])
    fmt.Println("Method:  ", data["Method"])
    fmt.Println("Latency: ", data["Latency"])
}

OnSuccess is fired every time a service has check it be online

func OnFailure(service map[string]interface{}) {
    fmt.Println("oh no! an event is failing right now! do something!")
    fmt.Println(service)
}

OnFailure is fired every time a service is failing

func (p pkg) OnLoad(db sqlbuilder.Database) {
    fmt.Println("=============================================================")
    fmt.Printf("  Statup Example Plugin Loaded using %v database\n", db.Name())
    fmt.Println("=============================================================")
}

OnLoad is fired after plugin is loaded into the environment

Interacting with Database

The Example Statup Plugin includes a variable Database that will allow you to interact with the Statup database. Checkout database.go to see a full example of Create, Read, Update and then Deleting a custom Communication entry into the database.

// Insert a new communication into database
// once inserted, return the Communication
func (c *Communication) Create() *Communication {
	uuid, err := CommunicationTable().Insert(c)
	if err != nil {
		panic(err)
	}
	c.Id = uuid.(int64)
	return c
}

Custom HTTP Routes

Plugin's can include their own HTTP route to accept GET/POST requests. Route are loaded after Statup loads all of it's Routes. Checkout routes.go on the example plugin to see a full example of how to use it.

// You must have a Routes() method in your plugin
func (p *pkg) Routes() []plugin.Routing {
	return []plugin.Routing{{
		URL:     "hello",
		Method:  "GET",
		Handler: CustomInfoHandler,
	}}
}

// This is the HTTP handler for the '/hello' URL created above
func CustomInfoHandler(w http.ResponseWriter, r *http.Request) {
	w.WriteHeader(http.StatusOK)
	fmt.Fprintln(w, "Oh Wow!!! This is cool...")
}

Plugin To-Do List

• Ability to includes assets like jpg, json, etc