Class: Google::Cloud::Spanner::Database::Job::List

Inherits:
Array
  • Object
show all
Defined in:
lib/google/cloud/spanner/database/job/list.rb

Overview

List

List is a special case Array with additional values for database operations.

Instance Method Summary collapse

Instance Method Details

#all {|job| ... } ⇒ 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 database job by passing a block:

require "google/cloud/spanner"

spanner = Google::Cloud::Spanner.new

instance = spanner.instance "my-instance"

jobs = instance.database_operations
jobs.all do |job|
  puts job.database.database_id
end

Using the enumerator by not passing a block:

require "google/cloud/spanner"

spanner = Google::Cloud::Spanner.new

instance = spanner.instance "my-instance"

jobs = instance.database_operations
all_database_ids = jobs.all.map do |job|
  job.database.database_id
end

Yields:

  • (job) —

    The block for accessing each database job.

Yield Parameters:

Returns:

  • (Enumerator) 


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# File 'lib/google/cloud/spanner/database/job/list.rb', line 133

def all &block
  return enum_for :all unless block_given?

  results = self
  loop do
    results.each(&block)
    break unless next?
    grpc.next_page
    results = self.class.from_grpc grpc, service
  end
end

#next ⇒ Google::Cloud::Spanner::Database::Job::List

Retrieve the next page of database jobs.

Examples:

require "google/cloud/spanner"

spanner = Google::Cloud::Spanner.new

instance = spanner.instance "my-instance"

jobs = instance.database_operations
if jobs.next?
  next_jobs = jobs.next
end

Returns:



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# File 'lib/google/cloud/spanner/database/job/list.rb', line 83

def next
  ensure_service!

  return nil unless next?
  grpc.next_page
  self.class.from_grpc grpc, service
end

#next? ⇒ Boolean

Whether there is a next page of database jobs.

Examples:

require "google/cloud/spanner"

spanner = Google::Cloud::Spanner.new

instance = spanner.instance "my-instance"

jobs = instance.database_operations
if jobs.next?
  next_jobs = jobs.next
end

Returns:

  • (Boolean) 


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# File 'lib/google/cloud/spanner/database/job/list.rb', line 62

def next?
  grpc.next_page?
end