// BindApp makes the bind between the service instance and an app.
func (si *ServiceInstance) BindApp(app bind.App) error {
err := si.AddApp(app.GetName())
if err != nil {
return &errors.Http{Code: http.StatusConflict, Message: "This app is already bound to this service instance."}
}
err = si.update()
if err != nil {
return err
}
if len(app.GetUnits()) == 0 {
return &errors.Http{Code: http.StatusPreconditionFailed, Message: "This app does not have an IP yet."}
}
envs := make(chan map[string]string, len(app.GetUnits())+1)
for _, unit := range app.GetUnits() {
go func(unit bind.Unit) {
vars, _ := si.BindUnit(app, unit)
envs <- vars
}(unit)
}
var envVars []bind.EnvVar
for k, v := range <-envs {
envVars = append(envVars, bind.EnvVar{
Name: k,
Value: v,
Public: false,
InstanceName: si.Name,
})
}
return app.SetEnvs(envVars, false)
}
func (si *ServiceInstance) Bind(app bind.App) error {
err := si.AddApp(app.GetName())
if err != nil {
return &errors.Http{Code: http.StatusConflict, Message: "This app is already binded to this service instance."}
}
var envVars []bind.EnvVar
var setEnv = func(env map[string]string) {
for k, v := range env {
envVars = append(envVars, bind.EnvVar{
Name: k,
Value: v,
Public: false,
InstanceName: si.Name,
})
}
}
cli := si.Service().ProductionEndpoint()
if len(app.GetUnits()) == 0 {
return &errors.Http{Code: http.StatusPreconditionFailed, Message: "This app does not have an IP yet."}
}
env, err := cli.Bind(si, app)
if err != nil {
return err
}
setEnv(env)
err = si.update()
if err != nil {
cli.Unbind(si, app)
return err
}
return app.SetEnvs(envVars, false)
}
func (c *Client) Unbind(instance *ServiceInstance, app bind.App) (err error) {
log.Print("Attempting to call unbind of service instance " + instance.Name + " and app " + app.GetName() + " at " + instance.ServiceName + " api")
var resp *http.Response
url := "/resources/" + instance.Name + "/hostname/" + app.GetUnits()[0].GetIp()
if resp, err = c.issueRequest(url, "DELETE", nil); err == nil && resp.StatusCode > 299 {
msg := "Failed to unbind instance " + instance.Name + " from the app " + app.GetName() + ": " + c.buildErrorMessage(err, resp)
log.Print(msg)
err = &errors.Http{Code: http.StatusInternalServerError, Message: msg}
}
return
}
func (c *Client) Bind(instance *ServiceInstance, app bind.App) (envVars map[string]string, err error) {
log.Print("Attempting to call bind of service instance " + instance.Name + " and app " + app.GetName() + " at " + instance.ServiceName + " api")
var resp *http.Response
params := map[string][]string{
"hostname": {app.GetUnits()[0].GetIp()},
}
if resp, err = c.issueRequest("/resources/"+instance.Name, "POST", params); err == nil && resp.StatusCode < 300 {
return c.jsonFromResponse(resp)
} else if resp.StatusCode == http.StatusPreconditionFailed {
err = &errors.Http{Code: resp.StatusCode, Message: "You cannot bind any app to this service instance because it is not ready yet."}
} else {
msg := "Failed to bind instance " + instance.Name + " to the app " + app.GetName() + ": " + c.buildErrorMessage(err, resp)
log.Print(msg)
err = &errors.Http{Code: http.StatusInternalServerError, Message: msg}
}
return
}
func (si *ServiceInstance) Unbind(app bind.App) error {
err := si.RemoveApp(app.GetName())
if err != nil {
return &errors.Http{Code: http.StatusPreconditionFailed, Message: "This app is not binded to this service instance."}
}
err = si.update()
if err != nil {
return err
}
go func() {
si.Service().ProductionEndpoint().Unbind(si, app)
}()
var envVars []string
for k := range app.InstanceEnv(si.Name) {
envVars = append(envVars, k)
}
return app.UnsetEnvs(envVars, false)
}
// UnbindApp makes the unbind between the service instance and an app.
func (si *ServiceInstance) UnbindApp(app bind.App) error {
err := si.RemoveApp(app.GetName())
if err != nil {
return &errors.Http{Code: http.StatusPreconditionFailed, Message: "This app is not bound to this service instance."}
}
err = si.update()
if err != nil {
return err
}
for _, unit := range app.GetUnits() {
go func(unit bind.Unit) {
si.UnbindUnit(unit)
}(unit)
}
var envVars []string
for k := range app.InstanceEnv(si.Name) {
envVars = append(envVars, k)
}
return app.UnsetEnvs(envVars, false)
}