Cloud Bigtable API - Class Google::Cloud::Bigtable::Policy (v2.10.1)

Reference documentation and code samples for the Cloud Bigtable API class Google::Cloud::Bigtable::Policy.

Policy

Represents a Cloud IAM Policy for Bigtable resources.

A common pattern for updating a resource's metadata, such as its policy, is to read the current data from the service, update the data locally, and then write the modified data back to the resource. This pattern may result in a conflict if two or more processes attempt the sequence simultaneously. IAM solves this problem with the #etag property, which is used to verify whether the policy has changed since the last request. When you make a request with an etag value, Cloud IAM compares the etag value in the request with the existing etag value associated with the policy. It writes the policy only if the etag values match.

Inherits

  • Object

Example

require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new
instance = bigtable.instance "my-instance"

policy = instance.policy
policy.remove "roles/owner", "user:owner@example.com"
policy.add "roles/owner", "user:newowner@example.com"
policy.roles["roles/viewer"] = ["allUsers"]

Methods

#add

def add(role_name, member)

Convenience method for adding a member to a binding on this policy. See Understanding Roles for a list of primitive and curated roles. See Binding for a list of values and patterns for members.

Parameters
  • role_name (String) — A Cloud IAM role, such as "roles/bigtable.admin".
  • member (String) — A Cloud IAM identity, such as "user:owner@example.com".
Example 
require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new
instance = bigtable.instance "my-instance"

policy = instance.policy
policy.add "roles/owner", "user:newowner@example.com"

#etag

def etag() -> String

Used to check if the policy has changed since the last request. The policy will be written only if the etag values match.

Returns
  • (String) — the current value of etag

#etag=

def etag=(value) -> String

Used to check if the policy has changed since the last request. The policy will be written only if the etag values match.

Parameter
  • value (String) — the newly set value
Returns
  • (String) — the newly set value

#initialize

def initialize(etag, roles = nil) -> Policy

Creates a Policy instance.

Parameters
  • etag (String)
  • roles (Array<String>)
Returns
  • (Policy) — a new instance of Policy

#remove

def remove(role_name, member)

Convenience method for removing a member from a binding on this policy. See Understanding Roles for a list of primitive and curated roles.See Binding for a list of values and patterns for members.

Parameters
  • role_name (String) — A Cloud IAM role, such as "roles/Bigtable.admin".
  • member (String) — A Cloud IAM identity, such as "user:owner@example.com".
Example 
require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new
instance = bigtable.instance "my-instance"

policy = instance.policy
policy.remove "roles/owner", "user:newowner@example.com"

#role

def role(role_name) -> Array<String>

Convenience method returning the array of members bound to a role in this policy. Returns an empty array if no value is present for the role in #roles. See Understanding Roles for a list of primitive and curated roles. See Binding for a list of values and patterns for members.

Returns
  • (Array<String>) — The members strings, or an empty array.
Example 
require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new
instance = bigtable.instance "my-instance"

policy = instance.policy
policy.role("roles/viewer") << "user:viewer@example.com"

#roles

def roles() -> Hash{String => Array<String>}

The bindings that associate roles with an array of members. See Understanding Roles for a listing of primitive and curated roles.

Returns
  • (Hash{String => Array<String>}) — the current value of roles

#roles=

def roles=(value) -> Hash{String => Array<String>}

The bindings that associate roles with an array of members. See Understanding Roles for a listing of primitive and curated roles.

Parameter
  • value (Hash{String => Array<String>}) — the newly set value
Returns
  • (Hash{String => Array<String>}) — the newly set value