Class: Google::Cloud::Bigtable::Cluster::List

Inherits:
Array
  • Object
show all
Defined in:
lib/google/cloud/bigtable/cluster/list.rb

Overview

Cluster::List is a special case Array with additional values.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#failed_locations ⇒ Object

Locations from which cluster information could not be retrieved, due to an outage or some other transient condition. Clusters from these locations may be missing from clusters or may only have partial information returned.



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# File 'lib/google/cloud/bigtable/cluster/list.rb', line 46

def failed_locations
  @failed_locations
end

#token ⇒ Object

If not empty, indicates that there are more records that match the request and this value should be passed to continue.



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# File 'lib/google/cloud/bigtable/cluster/list.rb', line 39

def token
  @token
end

Instance Method Details

#all {|cluster| ... } ⇒ Enumerator?

Retrieves remaining results by repeatedly invoking #next until #next? returns false. Calls the given block once for each result, which is passed as the argument to the block.

An enumerator is returned if no block is given.

This method will make repeated API calls until all remaining results are retrieved (unlike #each, for example, which merely iterates over the results returned by a single API call). Use with caution.

Examples:

Iterating each cluster by passing a block:

require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new

bigtable.clusters.all do |cluster|
  puts cluster.cluster_id
end

Using the enumerator by not passing a block:

require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new

all_cluster_ids = bigtable.clusters.all.map do |cluster|
  puts cluster.cluster_id
end

Yields:

  • (cluster) —

    The block for accessing each cluster.

Yield Parameters:

  • cluster (Cluster) —

    The cluster object.

Returns:

  • (Enumerator, nil) —

    An enumerator is returned if no block is given, otherwise nil.



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# File 'lib/google/cloud/bigtable/cluster/list.rb', line 132

def all
  return enum_for :all unless block_given?

  results = self
  loop do
    results.each { |r| yield r }
    break unless results.next?
    results = results.next
  end
end

#next ⇒ Cluster::List

Retrieve the next page of clusters.

Examples:

require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new

clusters = bigtable.clusters
if clusters.next?
  next_clusters = clusters.next
end

Returns:



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# File 'lib/google/cloud/bigtable/cluster/list.rb', line 89

def next
  return nil unless next?
  ensure_service!
  grpc = service.list_clusters instance_id, token: token
  next_list = self.class.from_grpc grpc, service, instance_id: instance_id
  next_list.failed_locations.concat(failed_locations.map(&:to_s)) if failed_locations
  next_list
end

#next? ⇒ Boolean

Whether there is a next page of clusters.

Examples:

require "google/cloud/bigtable"

bigtable = Google::Cloud::Bigtable.new

clusters = bigtable.clusters
if clusters.next?
  next_clusters = clusters.next
end

Returns:

  • (Boolean) 


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# File 'lib/google/cloud/bigtable/cluster/list.rb', line 70

def next?
  !token.nil?
end