Class: Google::Cloud::Bigquery::Table::AsyncInserter

Inherits:
Object
  • Object
show all
Includes:
MonitorMixin
Defined in:
lib/google/cloud/bigquery/table/async_inserter.rb

Overview

AsyncInserter

Used to insert multiple rows in batches to a topic. See #insert_async.

Examples:

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.table "my_table"
inserter = table.insert_async do |response|
  log_insert "inserted #{response.insert_count} rows " \
    "with #{response.error_count} errors"
end

rows = [
  { "first_name" => "Alice", "age" => 21 },
  { "first_name" => "Bob", "age" => 22 }
]
inserter.insert rows

inserter.stop.wait!

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#interval ⇒ Numeric (readonly)

The number of seconds to collect rows before the batch is inserted. Default is 10.

Returns:

  • (Numeric) —

    the current value of interval



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 59

def interval
  @interval
end

#max_bytes ⇒ Integer (readonly)

The maximum size of rows to be collected before the batch is inserted. Default is 10,000,000 (10MB).

Returns:

  • (Integer) —

    the current value of max_bytes



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 59

def max_bytes
  @max_bytes
end

#max_rows ⇒ Integer (readonly)

The maximum number of rows to be collected before the batch is inserted. Default is 500.

Returns:

  • (Integer) —

    the current value of max_rows



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 59

def max_rows
  @max_rows
end

#threads ⇒ Integer (readonly)

The number of threads used to insert rows. Default is 4.

Returns:

  • (Integer) —

    the current value of threads



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 59

def threads
  @threads
end

Instance Method Details

#flush ⇒ AsyncInserter

Forces all rows in the current batch to be inserted immediately.

Returns:



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 174

def flush
  synchronize do
    push_batch_request!
    @cond.signal
  end

  self
end

#insert(rows) ⇒ Object

Adds rows to the async inserter to be inserted. Rows will be collected in batches and inserted together. See Google::Cloud::Bigquery::Table#insert_async.

Parameters:

  • rows (Hash, Array<Hash>) —

    A hash object or array of hash objects containing the data.



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 100

def insert rows
  return nil if rows.nil?
  return nil if rows.is_a?(Array) && rows.empty?
  rows = [rows] if rows.is_a? Hash

  synchronize do
    rows.each do |row|
      if @batch.nil?
        @batch = Batch.new max_bytes: @max_bytes, max_rows: @max_rows
        @batch.insert row
      else
        unless @batch.try_insert row
          push_batch_request!

          @batch = Batch.new max_bytes: @max_bytes,
                             max_rows: @max_rows
          @batch.insert row
        end
      end

      @batch_created_at ||= ::Time.now
      @background_thread ||= Thread.new { run_background }

      push_batch_request! if @batch.ready?
    end

    @cond.signal
  end

  true
end

#started? ⇒ boolean

Whether the inserter has been started.

Returns:

  • (boolean) —

    true when started, false otherwise.



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 188

def started?
  !stopped?
end

#stop ⇒ AsyncInserter

Begins the process of stopping the inserter. Rows already in the queue will be inserted, but no new rows can be added. Use #wait! to block until the inserter is fully stopped and all pending rows have been inserted.

Returns:



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 140

def stop
  synchronize do
    break if @stopped

    @stopped = true
    push_batch_request!
    @cond.signal
  end

  self
end

#stopped? ⇒ boolean

Whether the inserter has been stopped.

Returns:

  • (boolean) —

    true when stopped, false otherwise.



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 197

def stopped?
  synchronize { @stopped }
end

#wait!(timeout = nil) ⇒ AsyncInserter

Blocks until the inserter is fully stopped, all pending rows have been inserted, and all callbacks have completed. Does not stop the inserter. To stop the inserter, first call #stop and then call #wait! to block until the inserter is stopped.

Returns:



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# File 'lib/google/cloud/bigquery/table/async_inserter.rb', line 160

def wait! timeout = nil
  synchronize do
    @thread_pool.shutdown
    @thread_pool.wait_for_termination timeout
  end

  self
end