// Copyright 2016 Google Inc.
//
// 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.

syntax = "proto3";

package google.monitoring.v3;

option csharp_namespace = "Google.Cloud.Monitoring.V3";
option go_package = "google.golang.org/genproto/googleapis/monitoring/v3;monitoring";
option java_multiple_files = true;
option java_outer_classname = "GroupProto";
option java_package = "com.google.monitoring.v3";


// The description of a dynamic collection of monitored resources. Each group
// has a filter that is matched against monitored resources and their associated
// metadata. If a group's filter matches an available monitored resource, then
// that resource is a member of that group.  Groups can contain any number of
// monitored resources, and each monitored resource can be a member of any
// number of groups.
//
// Groups can be nested in parent-child hierarchies. The `parentName` field
// identifies an optional parent for each group.  If a group has a parent, then
// the only monitored resources available to be matched by the group's filter
// are the resources contained in the parent group.  In other words, a group
// contains the monitored resources that match its filter and the filters of all
// the group's ancestors.  A group without a parent can contain any monitored
// resource.
//
// For example, consider an infrastructure running a set of instances with two
// user-defined tags: `"environment"` and `"role"`. A parent group has a filter,
// `environment="production"`.  A child of that parent group has a filter,
// `role="transcoder"`.  The parent group contains all instances in the
// production environment, regardless of their roles.  The child group contains
// instances that have the transcoder role *and* are in the production
// environment.
//
// The monitored resources contained in a group can change at any moment,
// depending on what resources exist and what filters are associated with the
// group and its ancestors.
message Group {
  // Output only. The name of this group. The format is
  // `"projects/{project_id_or_number}/groups/{group_id}"`.
  // When creating a group, this field is ignored and a new name is created
  // consisting of the project specified in the call to `CreateGroup`
  // and a unique `{group_id}` that is generated automatically.
  string name = 1;

  // A user-assigned name for this group, used only for display purposes.
  string display_name = 2;

  // The name of the group's parent, if it has one.
  // The format is `"projects/{project_id_or_number}/groups/{group_id}"`.
  // For groups with no parent, `parentName` is the empty string, `""`.
  string parent_name = 3;

  // The filter used to determine which monitored resources belong to this group.
  string filter = 5;

  // If true, the members of this group are considered to be a cluster.
  // The system can perform additional analysis on groups that are clusters.
  bool is_cluster = 6;
}