Class: Mongo::Grid::FSBucket::Stream::Write

Inherits:
Object
  • Object
show all
Defined in:
lib/mongo/grid/stream/write.rb

Overview

A stream that writes files to the FSBucket.

Since:

  • 2.1.0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fs, options) ⇒ Write

Create a stream for writing files to the FSBucket.

Examples:

Create the stream.

Stream::Write.new(fs, options)

Parameters:

  • fs (FSBucket) —

    The GridFS bucket object.

  • options (Hash) —

    The write stream options.

  • opts (Hash) —

    a customizable set of options

Options Hash (options):

  • :file_id (Object) —

    The file id. An ObjectId is generated if the file id is not provided.

  • :write (Hash) —

    Deprecated. Equivalent to :write_concern option.

  • :write_concern (Hash) —

    The write concern options. Can be :w => Integer|String, :fsync => Boolean, :j => Boolean.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 67

def initialize(fs, options)
  @fs = fs
  @length = 0
  @n = 0
  @file_id = options[:file_id] || BSON::ObjectId.new
  @options = options.dup
=begin WriteConcern object support
  if @options[:write_concern].is_a?(WriteConcern::Base)
    # Cache the instance so that we do not needlessly reconstruct it.
    @write_concern = @options[:write_concern]
    @options[:write_concern] = @write_concern.options
  end
=end
  @options.freeze
  @filename = @options[:filename]
  @open = true
end

Instance Attribute Details

#file_id ⇒ Object (readonly)

Returns file_id The id of the file being uploaded.

Returns:

  • (Object) —

    file_id The id of the file being uploaded.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 33

def file_id
  @file_id
end

#filename ⇒ String (readonly)

Returns filename The name of the file being uploaded.

Returns:

  • (String) —

    filename The name of the file being uploaded.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 38

def filename
  @filename
end

#fs ⇒ FSBucket (readonly)

Returns fs The fs bucket to which this stream writes.

Returns:

  • (FSBucket) —

    fs The fs bucket to which this stream writes.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 28

def fs
  @fs
end

#options ⇒ Hash (readonly)

Returns options The write stream options.

Returns:

  • (Hash) —

    options The write stream options.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 43

def options
  @options
end

Instance Method Details

#abort ⇒ true

Abort the upload by deleting all chunks already inserted.

Examples:

Abort the write operation.

stream.abort

Returns:

  • (true) —

    True if the operation was aborted and the stream is closed.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 159

def abort
  fs.chunks_collection.find({ :files_id => file_id }, @options).delete_many
  (@open = false) || true
end

#close ⇒ BSON::ObjectId, Object

Close the write stream.

Examples:

Close the stream.

stream.close

Returns:

  • (BSON::ObjectId, Object) —

    The file id.

Raises:

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 115

def close
  ensure_open!
  update_length
  files_collection.insert_one(file_info, @options)
  @open = false
  file_id
end

#closed? ⇒ true, false

Is the stream closed.

Examples:

Is the stream closed.

stream.closed?

Returns:

  • (true, false) —

    Whether the stream is closed.

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 147

def closed?
  !@open
end

#write(io) ⇒ Stream::Write

Write to the GridFS bucket from the source stream.

Examples:

Write to GridFS.

stream.write(io)

Parameters:

  • io (IO) —

    The source io stream to upload from.

Returns:

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 95

def write(io)
  ensure_open!
  @indexes ||= ensure_indexes!
  @length += io.size
  chunks = File::Chunk.split(io, file_info, @n)
  @n += chunks.size
  chunks_collection.insert_many(chunks) unless chunks.empty?
  self
end

#write_concern ⇒ Mongo::WriteConcern

Get the write concern used when uploading.

Examples:

Get the write concern.

stream.write_concern

Returns:

Since:

  • 2.1.0



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# File 'lib/mongo/grid/stream/write.rb', line 131

def write_concern
  @write_concern ||= if wco = @options[:write_concern] || @options[:write]
    WriteConcern.get(wco)
  else
    fs.write_concern
  end
end