Class: Aerospike::Command

Inherits:

Object

• Object
• Aerospike::Command

Defined in:

lib/aerospike/command/command.rb

Overview

:nodoc:

Direct Known Subclasses

MultiCommand, SingleCommand

Instance Method Summary

• #execute ⇒ Object
• #initialize(node = nil) ⇒ Command constructor

  A new instance of Command.

• #set_delete(policy, key) ⇒ Object

  Writes the command for delete operations.

• #set_exists(policy, key) ⇒ Object

  Writes the command for exist operations.

• #set_operate(policy, key, args) ⇒ Object

  Implements different command operations.

• #set_query(cluster, policy, statement, background, node_partitions) ⇒ Object
• #set_read(policy, key, bin_names) ⇒ Object

  Writes the command for get operations (specified bins).

• #set_read_for_key_only(policy, key) ⇒ Object

  Writes the command for get operations (all bins).

• #set_read_header(policy, key) ⇒ Object

  Writes the command for getting metadata operations.

• #set_scan(cluster, policy, namespace, set_name, bin_names, node_partitions) ⇒ Object
• #set_touch(policy, key) ⇒ Object

  Writes the command for touch operations.

• #set_udf(policy, key, package_name, function_name, args) ⇒ Object
• #set_write(policy, operation, key, bins) ⇒ Object

  Writes the command for write operations.

• #write_bins ⇒ Object

  List of all bins that this command will write to - sub-classes should override this as appropriate.

Constructor Details

#initialize(node = nil) ⇒ Command

Returns a new instance of Command.

# File 'lib/aerospike/command/command.rb', line 90

def initialize(node = nil)
  @data_offset = 0
  @data_buffer = nil

  @node = node

  @compress = false

  # will add before use
  @sequence = Atomic.new(-1)

  self
end

Instance Method Details

#execute ⇒ Object

Raises:

• (Aerospike::Exceptions::Timeout)

# File 'lib/aerospike/command/command.rb', line 729

def execute
  iterations = 0

  # set timeout outside the loop
  limit = Time.now + @policy.timeout

  # Execute command until successful, timed out or maximum iterations have been reached.
  while true
    # too many retries
    iterations += 1
    break if (@policy.max_retries > 0) && (iterations > @policy.max_retries + 1)

    # Sleep before trying again, after the first iteration
    sleep(@policy.sleep_between_retries) if iterations > 1 && @policy.sleep_between_retries > 0

    # check for command timeout
    break if @policy.timeout > 0 && Time.now > limit

    begin
      @node = get_node
      @conn = @node.get_connection(@policy.timeout)
    rescue => e
      if @node
        # Socket connection error has occurred. Decrease health and retry.
        @node.decrease_health

        Aerospike.logger.error("Node #{@node.to_s}: #{e}")
      else
        Aerospike.logger.error("No node available for transaction: #{e}")
      end
      next
    end

    # Draw a buffer from buffer pool, and make sure it will be put back
    begin
      @data_buffer = Buffer.get

      # Set command buffer.
      begin
        write_buffer
      rescue => e
        Aerospike.logger.error(e)

        # All runtime exceptions are considered fatal. Do not retry.
        # Close socket to flush out possible garbage. Do not put back in pool.
        @conn.close if @conn
        raise e
      end

      # Reset timeout in send buffer (destined for server) and socket.
      @data_buffer.write_int32((@policy.timeout * 1000).to_i, 22)
      # Send command.
      begin
        @conn.write(@data_buffer, @data_offset)
      rescue => e
        # IO errors are considered temporary anomalies. Retry.
        # Close socket to flush out possible garbage. Do not put back in pool.
        @conn.close if @conn

        Aerospike.logger.error("Node #{@node.to_s}: #{e}")
        # IO error means connection to server @node is unhealthy.
        # Reflect cmd status.
        @node.decrease_health
        next
      end

      # Parse results.
      begin
        parse_result
      rescue => e
        case e
          # do not log the following exceptions
        when Aerospike::Exceptions::ScanTerminated
        when Aerospike::Exceptions::QueryTerminated
        else
          Aerospike.logger.error(e)
        end

        # close the connection
        # cancelling/closing the batch/multi commands will return an error, which will
        # close the connection to throw away its data and signal the server about the
        # situation. We will not put back the connection in the buffer.
        @conn.close if @conn
        raise e
      end

      # Reflect healthy status.
      @node.restore_health

      # Put connection back in pool.
      @node.put_connection(@conn)

      # command has completed successfully.  Exit method.
      return
    ensure
      Buffer.put(@data_buffer)
    end
  end # while

  # execution timeout
  raise Aerospike::Exceptions::Timeout.new(limit, iterations)
end

#set_delete(policy, key) ⇒ Object

Writes the command for delete operations

# File 'lib/aerospike/command/command.rb', line 141

def set_delete(policy, key)
  begin_cmd
  field_count = estimate_key_size(key)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  size_buffer
  write_header_write(policy,  INFO2_WRITE | INFO2_DELETE, field_count, 0)
  write_key(key)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  end_cmd
end

#set_exists(policy, key) ⇒ Object

Writes the command for exist operations

# File 'lib/aerospike/command/command.rb', line 181

def set_exists(policy, key)
  begin_cmd
  field_count = estimate_key_size(key)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  size_buffer
  write_header_read_header(policy, INFO1_READ | INFO1_NOBINDATA, field_count, 0)
  write_key(key)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  end_cmd
end

#set_operate(policy, key, args) ⇒ Object

Implements different command operations

# File 'lib/aerospike/command/command.rb', line 283

def set_operate(policy, key, args)
  begin_cmd
  field_count = estimate_key_size(key, policy)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(policy.filter_exp)
  field_count += 1 if exp_size > 0

  @data_offset += args.size

  size_buffer

  write_header_read_write(policy, args.read_attr, args.write_attr, field_count, args.operations.length)
  write_key(key, policy)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(policy.filter_exp, exp_size)

  args.operations.each do |operation|
    write_operation_for_operation(operation)
  end

  end_cmd
  mark_compressed(policy)
end

#set_query(cluster, policy, statement, background, node_partitions) ⇒ Object

# File 'lib/aerospike/command/command.rb', line 479

def set_query(cluster, policy, statement, background, node_partitions)
  function_arg_buffer = nil
  field_count = 0
  filter_size = 0

  is_new = cluster.supports_feature?(Aerospike::Features::PARTITION_QUERY)
  begin_cmd

  if statement.namespace
    @data_offset += statement.namespace.bytesize + FIELD_HEADER_SIZE
    field_count += 1
  end

  if statement.set_name
    @data_offset += statement.set_name.bytesize + FIELD_HEADER_SIZE
    field_count += 1
  end

  # Estimate recordsPerSecond field size. This field is used in new servers and not used
  # (but harmless to add) in old servers.
  if statement.records_per_second > 0
    @data_offset += 4 + FIELD_HEADER_SIZE
    field_count += 1
  end

  # Estimate socket timeout field size. This field is used in new servers and not used
  # (but harmless to add) in old servers.
  @data_offset += 4 + FIELD_HEADER_SIZE
  field_count += 1

  # Estimate task_id field.
  @data_offset += 8 + FIELD_HEADER_SIZE
  field_count += 1

  filter = statement.filters[0]
  bin_names = statement.bin_names
  packed_ctx = nil

  if filter
    col_type = filter.collection_type

    # Estimate INDEX_TYPE field.
    if col_type > 0
      @data_offset += FIELD_HEADER_SIZE + 1
      field_count += 1
    end

    # Estimate INDEX_RANGE field.
    @data_offset += FIELD_HEADER_SIZE
    filter_size += 1  # num filters
    filter_size += filter.estimate_size

    @data_offset += filter_size
    field_count += 1

    packed_ctx = filter.packed_ctx
    if packed_ctx
      @data_offset += FIELD_HEADER_SIZE + packed_ctx.length
      field_count += 1
    end
  end

  statement.set_task_id
  predexp = policy.predexp || statement.predexp

  if predexp
    @data_offset += FIELD_HEADER_SIZE
    pred_size = Aerospike::PredExp.estimate_size(predexp)
    @data_offset += pred_size
    field_count += 1
  end

  unless policy.filter_exp.nil?
    exp_size = estimate_expression_size(policy.filter_exp)
    field_count += 1 if exp_size > 0
  end

  # Estimate aggregation/background function size.
  if statement.function_name
    @data_offset += FIELD_HEADER_SIZE + 1 # udf type
    @data_offset += statement.package_name.bytesize + FIELD_HEADER_SIZE
    @data_offset += statement.function_name.bytesize + FIELD_HEADER_SIZE

    function_arg_buffer = ""
    if statement.function_args && !statement.function_args.empty?
      function_arg_buffer = Value.of(statement.function_args).to_bytes
    end
    @data_offset += FIELD_HEADER_SIZE + function_arg_buffer.bytesize
    field_count += 4
  end

  max_records = 0
  parts_full_size = 0
  parts_partial_digest_size = 0
  parts_partial_bval_size = 0

  unless node_partitions.nil?
    parts_full_size = node_partitions.parts_full.length * 2
    parts_partial_digest_size = node_partitions.parts_partial.length * 20

    unless filter.nil?
      parts_partial_bval_size = node_partitions.parts_partial.length * 8
    end
    max_records = node_partitions.record_max
  end

  if parts_full_size > 0
    @data_offset += parts_full_size + FIELD_HEADER_SIZE
    field_count += 1
  end

  if parts_partial_digest_size > 0
    @data_offset += parts_partial_digest_size + FIELD_HEADER_SIZE
    field_count += 1
  end

  if parts_partial_bval_size > 0
    @data_offset += parts_partial_bval_size + FIELD_HEADER_SIZE
    field_count += 1
  end

  # Estimate max records field size. This field is used in new servers and not used
  # (but harmless to add) in old servers.
  if max_records > 0
    @data_offset += 8 + FIELD_HEADER_SIZE
    field_count += 1
  end

  unless statement.operations.nil?
    operations = statement.operations
  end

  operation_count = 0

  if operations

    unless background
      raise Aerospike::Exceptions::Aerospike.new(Aerospike::ResultCode::PARAMETER_ERROR)
    end

    operations.each do |operation|
      estimate_operation_size_for_operation(operation)
    end
    operation_count = operations.size
  elsif !bin_names.empty?
    bin_names.each do |bin_name|
      estimate_operation_size_for_bin_name(bin_name)
    end
    operation_count = bin_names.length
    # Estimate size for selected bin names (query bin names already handled for old servers).
  end

  size_buffer

  if background
    write_header_write(policy, INFO2_WRITE, field_count, operation_count)
  else
    read_attr = INFO1_READ
    read_attr |= INFO1_NOBINDATA unless policy.include_bin_data
    read_attr |= INFO1_SHORT_QUERY if policy.short_query
    info_attr = INFO3_PARTITION_DONE if is_new
    write_header_read(policy, read_attr, info_attr, field_count, operation_count)
  end


  write_field_string(statement.namespace, FieldType::NAMESPACE) if statement.namespace
  write_field_string(statement.set_name, FieldType::TABLE) if statement.set_name


  # Write records per second.
  write_field_int(statement.records_per_second, FieldType::RECORDS_PER_SECOND) if statement.records_per_second > 0

  write_filter_exp(policy.filter_exp, exp_size)

  # Write socket idle timeout.
  write_field_int(policy.socket_timeout, FieldType::SOCKET_TIMEOUT)

  # Write task_id field
  write_field_int64(statement.task_id, FieldType::TRAN_ID)

  unless predexp.nil?
    write_field_header(pred_size, Aerospike::FieldType::PREDEXP)
    @data_offset = Aerospike::PredExp.write(
      predexp, @data_buffer, @data_offset
    )
  end

  if filter
    type = filter.collection_type

    if type > 0
      write_field_header(1, FieldType::INDEX_TYPE)
      @data_offset += @data_buffer.write_byte(type, @data_offset)
    end

    write_field_header(filter_size, FieldType::INDEX_RANGE)
    @data_offset += @data_buffer.write_byte(1, @data_offset)
    @data_offset = filter.write(@data_buffer, @data_offset)

    if packed_ctx
      write_field_header(packed_ctx.length, FieldType::INDEX_CONTEXT)
      @data_offset += @data_buffer.write_binary(packed_ctx, @data_offset)
    end
  end

  if statement.function_name
    write_field_header(1, FieldType::UDF_OP)
    @data_offset += @data_buffer.write_byte(1, @data_offset)
    write_field_string(statement.package_name, FieldType::UDF_PACKAGE_NAME)
    write_field_string(statement.function_name, FieldType::UDF_FUNCTION)
    write_field_string(function_arg_buffer, FieldType::UDF_ARGLIST)
  end
  if parts_full_size > 0
    write_field_header(parts_full_size, FieldType::PID_ARRAY)
    node_partitions.parts_full.each do |part|
      @data_offset += @data_buffer.write_uint16_little_endian(part.id, @data_offset)
    end
  end

  if parts_partial_digest_size > 0
    write_field_header(parts_partial_digest_size, FieldType::DIGEST_ARRAY)
    node_partitions.parts_partial.each do |part|
      @data_offset += @data_buffer.write_binary(part.digest, @data_offset)
    end
  end

  if parts_partial_bval_size > 0
    write_field_header(parts_partial_bval_size, FieldType::BVAL_ARRAY)
    @node_partitions.parts_partial.each do |part|
      @data_offset += @data_buffer.write_uint64_little_endian(part.bval, @data_offset)
    end
  end

  if max_records > 0
    write_field(max_records, FieldType::MAX_RECORDS)
  end

  if !operations.nil?
    operations.each do |operation|
      write_operation_for_operation(operation)
    end
  elsif !bin_names.nil? && (is_new || filter.nil?)
    bin_names.each do |bin_name|
      write_operation_for_bin_name(bin_name, Operation::READ)
    end
  end
  end_cmd
end

#set_read(policy, key, bin_names) ⇒ Object

Writes the command for get operations (specified bins)

# File 'lib/aerospike/command/command.rb', line 219

def set_read(policy, key, bin_names)
  if bin_names && !bin_names.empty?
    begin_cmd
    field_count = estimate_key_size(key)

    predexp_size = estimate_predexp(policy.predexp)
    field_count += 1 if predexp_size > 0

    exp_size = estimate_expression_size(@policy.filter_exp)
    field_count += 1 if exp_size > 0

    bin_names.each do |bin_name|
      estimate_operation_size_for_bin_name(bin_name)
    end

    size_buffer
    attr = INFO1_READ
    if bin_names.empty?
      attr |= INFO1_GET_ALL
    end

    write_header_read(policy, attr, 0, field_count, bin_names.length)
    write_key(key)
    write_predexp(policy.predexp, predexp_size)
    write_filter_exp(@policy.filter_exp, exp_size)

    bin_names.each do |bin_name|
      write_operation_for_bin_name(bin_name, Aerospike::Operation::READ)
    end

    end_cmd
    mark_compressed(policy)
  else
    set_read_for_key_only(policy, key)
  end
end

#set_read_for_key_only(policy, key) ⇒ Object

Writes the command for get operations (all bins)

# File 'lib/aerospike/command/command.rb', line 200

def set_read_for_key_only(policy, key)
  begin_cmd
  field_count = estimate_key_size(key)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  size_buffer
  write_header_read(policy, INFO1_READ | INFO1_GET_ALL, 0, field_count, 0)
  write_key(key)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  end_cmd
end

#set_read_header(policy, key) ⇒ Object

Writes the command for getting metadata operations

# File 'lib/aerospike/command/command.rb', line 257

def set_read_header(policy, key)
  begin_cmd
  field_count = estimate_key_size(key)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  size_buffer

  # The server does not currently return record header data with _INFO1_NOBINDATA attribute set.
  # The workaround is to request a non-existent bin.
  # TODO: Fix this on server.
  #command.set_read(INFO1_READ | _INFO1_NOBINDATA);
  write_header_read_header(policy, INFO1_READ|INFO1_NOBINDATA, field_count, 0)

  write_key(key)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  end_cmd
  mark_compressed(policy)
end

#set_scan(cluster, policy, namespace, set_name, bin_names, node_partitions) ⇒ Object

# File 'lib/aerospike/command/command.rb', line 337

def set_scan(cluster, policy, namespace, set_name, bin_names, node_partitions)
  # Estimate buffer size
  begin_cmd
  field_count = 0

  parts_full_size = node_partitions.parts_full.length * 2
  parts_partial_size = node_partitions.parts_partial.length * 20
  max_records = node_partitions.record_max

  if namespace
    @data_offset += namespace.bytesize + FIELD_HEADER_SIZE
    field_count += 1
  end

  if set_name
    @data_offset += set_name.bytesize + FIELD_HEADER_SIZE
    field_count += 1
  end

  if parts_full_size > 0
    @data_offset += parts_full_size + FIELD_HEADER_SIZE
    field_count += 1
  end

  if parts_partial_size > 0
    @data_offset += parts_partial_size + FIELD_HEADER_SIZE
    field_count += 1
  end

  if max_records > 0
    @data_offset += 8 + FIELD_HEADER_SIZE
    field_count += 1
  end

  if policy.records_per_second > 0
    @data_offset += 4 + FIELD_HEADER_SIZE
    field_count += 1
  end

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  # Estimate scan options size.
  # @data_offset += 2 + FIELD_HEADER_SIZE
  # field_count += 1

  # Estimate scan timeout size.
  @data_offset += 4 + FIELD_HEADER_SIZE
  field_count += 1

  if bin_names
    bin_names.each do |bin_name|
      estimate_operation_size_for_bin_name(bin_name)
    end
  end

  size_buffer
  read_attr = INFO1_READ

  unless policy.include_bin_data
    read_attr |= INFO1_NOBINDATA
  end

  info_attr = 0
  if cluster.supports_feature?(Aerospike::Features::PARTITION_QUERY)
    info_attr = INFO3_PARTITION_DONE
  end

  operation_count = 0
  unless bin_names.nil?
    operation_count = bin_names.length
  end

  write_header_read(policy, read_attr, info_attr, field_count, operation_count)

  if namespace
    write_field_string(namespace, Aerospike::FieldType::NAMESPACE)
  end

  if set_name
    write_field_string(set_name, Aerospike::FieldType::TABLE)
  end

  if parts_full_size > 0
    write_field_header(parts_full_size, Aerospike::FieldType::PID_ARRAY)

    node_partitions.parts_full.each do |part|
      @data_buffer.write_uint16_little_endian(part.id, @data_offset)
      @data_offset += 2
    end
  end

  if parts_partial_size > 0
    write_field_header(parts_partial_size, Aerospike::FieldType::DIGEST_ARRAY)

    node_partitions.parts_partial.each do |part|
      @data_buffer.write_binary(part.digest, @data_offset)
      @data_offset += part.digest.length
    end
  end

  if max_records > 0
    write_field_int64(max_records, Aerospike::FieldType::MAX_RECORDS)
  end

  if policy.records_per_second > 0
    write_field_int(policy.records_per_second, Aerospike::FieldType::RECORDS_PER_SECOND)
  end

  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)

  # write_field_header(2, Aerospike::FieldType::SCAN_OPTIONS)

  # priority = policy.priority & 0xFF
  # priority <<= 4
  # if policy.fail_on_cluster_change
  #   priority |= 0x08
  # end

  # @data_buffer.write_byte(priority, @data_offset)
  # @data_offset += 1
  # @data_buffer.write_byte(policy.scan_percent.to_i.ord, @data_offset)
  # @data_offset += 1

  write_field_header(4, Aerospike::FieldType::SOCKET_TIMEOUT)
  @data_buffer.write_uint32(policy.socket_timeout.to_i, @data_offset)
  @data_offset += 4

  if bin_names
    bin_names.each do |bin_name|
      write_operation_for_bin_name(bin_name, Aerospike::Operation::READ)
    end
  end

  end_cmd
end

#set_touch(policy, key) ⇒ Object

Writes the command for touch operations

# File 'lib/aerospike/command/command.rb', line 160

def set_touch(policy, key)
  begin_cmd
  field_count = estimate_key_size(key)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  estimate_operation_size
  size_buffer
  write_header_write(policy,  INFO2_WRITE, field_count, 1)
  write_key(key)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  write_operation_for_operation_type(Aerospike::Operation::TOUCH)
  end_cmd
end

#set_udf(policy, key, package_name, function_name, args) ⇒ Object

# File 'lib/aerospike/command/command.rb', line 310

def set_udf(policy, key, package_name, function_name, args)
  begin_cmd
  field_count = estimate_key_size(key, policy)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  arg_bytes = args.to_bytes

  field_count += estimate_udf_size(package_name, function_name, arg_bytes)
  size_buffer

  write_header_write(policy, INFO2_WRITE, field_count, 0)
  write_key(key, policy)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)
  write_field_string(package_name, Aerospike::FieldType::UDF_PACKAGE_NAME)
  write_field_string(function_name, Aerospike::FieldType::UDF_FUNCTION)
  write_field_bytes(arg_bytes, Aerospike::FieldType::UDF_ARGLIST)

  end_cmd
  mark_compressed(policy)
end

#set_write(policy, operation, key, bins) ⇒ Object

Writes the command for write operations

# File 'lib/aerospike/command/command.rb', line 111

def set_write(policy, operation, key, bins)
  begin_cmd
  field_count = estimate_key_size(key, policy)

  predexp_size = estimate_predexp(policy.predexp)
  field_count += 1 if predexp_size > 0

  exp_size = estimate_expression_size(@policy.filter_exp)
  field_count += 1 if exp_size > 0

  bins.each do |bin|
    estimate_operation_size_for_bin(bin)
  end

  size_buffer

  write_header_write(policy, INFO2_WRITE, field_count, bins.length)
  write_key(key, policy)
  write_predexp(policy.predexp, predexp_size)
  write_filter_exp(@policy.filter_exp, exp_size)

  bins.each do |bin|
    write_operation_for_bin(bin, operation)
  end

  end_cmd
  mark_compressed(policy)
end

#write_bins ⇒ Object

List of all bins that this command will write to - sub-classes should override this as appropriate.

# File 'lib/aerospike/command/command.rb', line 106

def write_bins
  []
end