/
client.go
213 lines (188 loc) · 6.98 KB
/
client.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package applicationoffers
import (
"github.com/juju/errors"
"github.com/juju/loggo"
"gopkg.in/juju/charm.v6-unstable"
"gopkg.in/juju/names.v2"
"github.com/juju/juju/api/base"
"github.com/juju/juju/apiserver/params"
"github.com/juju/juju/core/crossmodel"
"github.com/juju/juju/permission"
)
var logger = loggo.GetLogger("juju.api.applicationoffers")
// Client allows access to the cross model management API end points.
type Client struct {
base.ClientFacade
facade base.FacadeCaller
}
// NewClient creates a new client for accessing the application offers API.
func NewClient(st base.APICallCloser) *Client {
frontend, backend := base.NewClientFacade(st, "ApplicationOffers")
return &Client{ClientFacade: frontend, facade: backend}
}
// Offer prepares application's endpoints for consumption.
func (c *Client) Offer(application string, endpoints []string, offerName string, desc string) ([]params.ErrorResult, error) {
// TODO(wallyworld) - support endpoint aliases
ep := make(map[string]string)
for _, name := range endpoints {
ep[name] = name
}
offers := []params.AddApplicationOffer{
{
ApplicationName: application,
ApplicationDescription: desc,
Endpoints: ep,
OfferName: offerName,
},
}
out := params.ErrorResults{}
if err := c.facade.FacadeCall("Offer", params.AddApplicationOffers{Offers: offers}, &out); err != nil {
return nil, errors.Trace(err)
}
return out.Results, nil
}
// ListOffers gets all remote applications that have been offered from this Juju model.
// Each returned application satisfies at least one of the the specified filters.
func (c *Client) ListOffers(filters ...crossmodel.ApplicationOfferFilter) ([]crossmodel.ApplicationOfferDetailsResult, error) {
var paramsFilter params.OfferFilters
for _, f := range filters {
// TODO(wallyworld) - include allowed users
filterTerm := params.OfferFilter{
OfferName: f.OfferName,
ApplicationName: f.ApplicationName,
}
filterTerm.Endpoints = make([]params.EndpointFilterAttributes, len(f.Endpoints))
for i, ep := range f.Endpoints {
filterTerm.Endpoints[i].Name = ep.Name
filterTerm.Endpoints[i].Interface = ep.Interface
filterTerm.Endpoints[i].Role = ep.Role
}
paramsFilter.Filters = append(paramsFilter.Filters, filterTerm)
}
applicationOffers := params.ListApplicationOffersResults{}
err := c.facade.FacadeCall("ListApplicationOffers", paramsFilter, &applicationOffers)
if err != nil {
return nil, errors.Trace(err)
}
return convertListResultsToModel(applicationOffers.Results), nil
}
func convertListResultsToModel(items []params.ApplicationOfferDetails) []crossmodel.ApplicationOfferDetailsResult {
result := make([]crossmodel.ApplicationOfferDetailsResult, len(items))
for i, one := range items {
eps := make([]charm.Relation, len(one.Endpoints))
for i, ep := range one.Endpoints {
eps[i] = charm.Relation{
Name: ep.Name,
Role: ep.Role,
Interface: ep.Interface,
Scope: ep.Scope,
Limit: ep.Limit,
}
}
result[i].Result = &crossmodel.ApplicationOfferDetails{
ApplicationName: one.ApplicationName,
OfferName: one.OfferName,
CharmName: one.CharmName,
ConnectedCount: one.ConnectedCount,
OfferURL: one.OfferURL,
Endpoints: eps,
}
}
return result
}
// GrantOffer grants a user access to the specified offers.
func (c *Client) GrantOffer(user, access string, offers ...string) error {
return c.modifyOfferUser(params.GrantOfferAccess, user, access, offers)
}
// RevokeOffer revokes a user's access to the specified offers.
func (c *Client) RevokeOffer(user, access string, offers ...string) error {
return c.modifyOfferUser(params.RevokeOfferAccess, user, access, offers)
}
func (c *Client) modifyOfferUser(action params.OfferAction, user, access string, offers []string) error {
var args params.ModifyOfferAccessRequest
if !names.IsValidUser(user) {
return errors.Errorf("invalid username: %q", user)
}
userTag := names.NewUserTag(user)
offerAccess := permission.Access(access)
if err := permission.ValidateOfferAccess(offerAccess); err != nil {
return errors.Trace(err)
}
for _, offer := range offers {
args.Changes = append(args.Changes, params.ModifyOfferAccess{
UserTag: userTag.String(),
Action: action,
Access: params.OfferAccessPermission(offerAccess),
OfferTag: names.NewApplicationOfferTag(offer).String(),
})
}
var result params.ErrorResults
err := c.facade.FacadeCall("ModifyOfferAccess", args, &result)
if err != nil {
return errors.Trace(err)
}
if len(result.Results) != len(args.Changes) {
return errors.Errorf("expected %d results, got %d", len(args.Changes), len(result.Results))
}
for i, r := range result.Results {
if r.Error != nil && r.Error.Code == params.CodeAlreadyExists {
logger.Warningf("offer %q is already shared with %q", offers[i], userTag.Id())
result.Results[i].Error = nil
}
}
return result.Combine()
}
// ApplicationOffer returns offered remote application details for a given URL.
func (c *Client) ApplicationOffer(urlStr string) (params.ApplicationOffer, error) {
url, err := crossmodel.ParseApplicationURL(urlStr)
if err != nil {
return params.ApplicationOffer{}, errors.Trace(err)
}
if url.Source != "" {
return params.ApplicationOffer{}, errors.NotSupportedf("query for non-local application offers")
}
found := params.ApplicationOffersResults{}
err = c.facade.FacadeCall("ApplicationOffers", params.ApplicationURLs{[]string{urlStr}}, &found)
if err != nil {
return params.ApplicationOffer{}, errors.Trace(err)
}
result := found.Results
if len(result) != 1 {
return params.ApplicationOffer{}, errors.Errorf("expected to find one result for url %q but found %d", url, len(result))
}
theOne := result[0]
if theOne.Error != nil {
return params.ApplicationOffer{}, errors.Trace(theOne.Error)
}
return theOne.Result, nil
}
// FindApplicationOffers returns all application offers matching the supplied filter.
func (c *Client) FindApplicationOffers(filters ...crossmodel.ApplicationOfferFilter) ([]params.ApplicationOffer, error) {
// We need at least one filter. The default filter will list all local applications.
if len(filters) == 0 {
return nil, errors.New("at least one filter must be specified")
}
var paramsFilter params.OfferFilters
for _, f := range filters {
filterTerm := params.OfferFilter{
OfferName: f.OfferName,
ModelName: f.ModelName,
OwnerName: f.OwnerName,
}
filterTerm.Endpoints = make([]params.EndpointFilterAttributes, len(f.Endpoints))
for i, ep := range f.Endpoints {
filterTerm.Endpoints[i].Name = ep.Name
filterTerm.Endpoints[i].Interface = ep.Interface
filterTerm.Endpoints[i].Role = ep.Role
}
paramsFilter.Filters = append(paramsFilter.Filters, filterTerm)
}
out := params.FindApplicationOffersResults{}
err := c.facade.FacadeCall("FindApplicationOffers", paramsFilter, &out)
if err != nil {
return nil, errors.Trace(err)
}
return out.Results, nil
}