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// Copyright 2016 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package logadmin
import (
"context"
vkit "cloud.google.com/go/logging/apiv2"
"google.golang.org/api/iterator"
mrpb "google.golang.org/genproto/googleapis/api/monitoredres"
logpb "google.golang.org/genproto/googleapis/logging/v2"
)
// ResourceDescriptors returns a ResourceDescriptorIterator
// for iterating over MonitoredResourceDescriptors. Requires ReadScope or AdminScope.
// See https://cloud.google.com/logging/docs/api/v2/#monitored-resources for an explanation of
// monitored resources.
// See https://cloud.google.com/logging/docs/api/v2/resource-list for a list of monitored resources.
func (c *Client) ResourceDescriptors(ctx context.Context) *ResourceDescriptorIterator {
it := &ResourceDescriptorIterator{
it: c.lClient.ListMonitoredResourceDescriptors(ctx,
&logpb.ListMonitoredResourceDescriptorsRequest{}),
}
it.pageInfo, it.nextFunc = iterator.NewPageInfo(
it.fetch,
func() int { return len(it.items) },
func() interface{} { b := it.items; it.items = nil; return b })
return it
}
// ResourceDescriptorIterator is an iterator over MonitoredResourceDescriptors.
type ResourceDescriptorIterator struct {
it *vkit.MonitoredResourceDescriptorIterator
pageInfo *iterator.PageInfo
nextFunc func() error
items []*mrpb.MonitoredResourceDescriptor
}
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *ResourceDescriptorIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
// Next returns the next result. Its second return value is Done if there are
// no more results. Once Next returns Done, all subsequent calls will return
// Done.
func (it *ResourceDescriptorIterator) Next() (*mrpb.MonitoredResourceDescriptor, error) {
if err := it.nextFunc(); err != nil {
return nil, err
}
item := it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *ResourceDescriptorIterator) fetch(pageSize int, pageToken string) (string, error) {
return iterFetch(pageSize, pageToken, it.it.PageInfo(), func() error {
item, err := it.it.Next()
if err != nil {
return err
}
it.items = append(it.items, item)
return nil
})
}
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