Class: Azure::Table::Batch

Inherits:
Object
  • Object
show all
Defined in:
lib/azure/table/batch.rb

Overview

Represents a batch of table operations.

Example usage (block syntax):

results = Batch.new “table”, “partition” do

  insert "row1", {"meta"=>"data"}
  insert "row2", {"meta"=>"data"}
end.execute

which is equivalent to (fluent syntax):

results = Batch.new(“table”, “partition”)

.insert("row1", {"meta"=>"data"})
.insert("row2", {"meta"=>"data"})
.execute

which is equivalent to (as class):

svc = TableSerice.new

batch = Batch.new “table”, “partition” batch.insert “row1”, “meta”=>“data” batch.insert “row2”, “meta”=>“data”

results = svc.execute_batch batch

Defined Under Namespace

Classes: ResponseWrapper

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table, partition, &block) ⇒ Batch

Returns a new instance of Batch.



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# File 'lib/azure/table/batch.rb', line 51

def initialize(table, partition, &block)
  @table = table
  @partition = partition
  @operations = []
  @entity_keys = []
  @table_service = Azure::Table::TableService.new
  uuid = UUID.new
  @batch_id = "batch_" + uuid.generate
  @changeset_id = "changeset_" + uuid.generate

  self.instance_eval(&block) if block_given?
end

Instance Attribute Details

#batch_id ⇒ Object

Returns the value of attribute batch_id.



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# File 'lib/azure/table/batch.rb', line 74

def batch_id
  @batch_id
end

Instance Method Details

#delete(row_key, options = {}) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 324

def delete(row_key, options={})
  add_operation(:delete, @table_service.entities_uri(table, partition, row_key), nil, {"If-Match"=> options[:if_match] || "*"})
  self
end

#insert(row_key, entity_values) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 206

def insert(row_key, entity_values)
  check_entity_key(row_key)

  body = Azure::Table::Serialization.hash_to_entry_xml({ 
      "PartitionKey" => partition, 
      "RowKey" => row_key
    }.merge(entity_values) ).to_xml

  add_operation(:post, @table_service.entities_uri(table), body)
  self
end

#insert_or_merge(row_key, entity_values) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 291

def insert_or_merge(row_key, entity_values)
  merge(row_key, entity_values, { :create_if_not_exists => true })
  self
end

#insert_or_replace(row_key, entity_values) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 305

def insert_or_replace(row_key, entity_values)
  update(row_key, entity_values, { :create_if_not_exists => true })
  self
end

#merge(row_key, entity_values, options = {}) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 268

def merge(row_key, entity_values, options={})
  check_entity_key(row_key)

  uri = @table_service.entities_uri(table, partition, row_key)

  headers = {}
  headers["If-Match"] = options[:if_match] || "*" unless options[:create_if_not_exists]

  body = Azure::Table::Serialization.hash_to_entry_xml(entity_values).to_xml

  add_operation(:merge, uri, body, headers)
  self
end

#parse_response(response) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 118

def parse_response(response)
  responses = BatchResponse.parse response.body
  new_responses = []

  (0..responses.length-1).each { |index|
    operation = operations[index]
    response = responses[index]

    if response[:status_code].to_i > 299
      # failed
      error = Azure::Core::Http::HTTPError.new(ResponseWrapper.new(response.merge({:uri=>operation[:uri]})))
      error.description = response[:message] if (error.description || '').strip == ''
      raise error
    else
      # success
      case operation[:method]
      when :post
        # entity from body
        result = Azure::Table::Serialization.hash_from_entry_xml(response[:body])

        entity = Azure::Table::Entity.new
        entity.table = table
        entity.updated = result[:updated]
        entity.etag = response[:headers]["etag"] || result[:etag]
        entity.properties = result[:properties]

        new_responses.push entity
      when :put, :merge
       # etag from headers
        new_responses.push response[:headers]["etag"]
      when :delete
        # true 
        new_responses.push nil
      end
    end
  }

  new_responses
end

#to_body ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 159

def to_body
  body = ""
  body.define_singleton_method(:add_line) do |a| self << (a||nil) + "\n" end

  body.add_line "--#{batch_id}"
  body.add_line "Content-Type: multipart/mixed; boundary=#{changeset_id}"
  body.add_line ""

  content_id = 1
  operations.each { |op|
    body.add_line "--#{changeset_id}"
    body.add_line "Content-Type: application/http"
    body.add_line "Content-Transfer-Encoding: binary"
    body.add_line ""
    body.add_line "#{op[:method].to_s.upcase} #{op[:uri]} HTTP/1.1"
    body.add_line "Content-ID: #{content_id}"

    if op[:headers]
      op[:headers].each { |k,v|
          body.add_line "#{k}: #{v}"
        }
    end
    
    if op[:body]
      body.add_line "Content-Type: application/atom+xml;type=entry"
      body.add_line "Content-Length: #{op[:body].bytesize.to_s}"
      body.add_line ""
      body.add_line op[:body]
    else
      body.add_line ""
    end 

    content_id += 1
  }
  body.add_line "--#{changeset_id}--"
  body.add_line "--#{batch_id}--"
end

#update(row_key, entity_values, options = {}) ⇒ Object 



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# File 'lib/azure/table/batch.rb', line 236

def update(row_key, entity_values, options={})
  check_entity_key(row_key)

  uri = @table_service.entities_uri(table, partition, row_key)

  headers = {}
  headers["If-Match"] = options[:if_match] || "*" unless options[:create_if_not_exists]

  body = Azure::Table::Serialization.hash_to_entry_xml(entity_values).to_xml

  add_operation(:put, uri, body, headers)
  self
end