Class: Dynamoid::AdapterPlugin::AwsSdkV2
- Inherits:
-
Object
- Object
- Dynamoid::AdapterPlugin::AwsSdkV2
- Defined in:
- lib/dynamoid/adapter_plugin/aws_sdk_v2.rb
Overview
The AwsSdkV2 adapter provides support for the aws-sdk version 2 for ruby.
Defined Under Namespace
Classes: ItemUpdater, Table
Constant Summary collapse
- EQ =
"EQ".freeze
- RANGE_MAP =
{ range_greater_than: 'GT', range_less_than: 'LT', range_gte: 'GE', range_lte: 'LE', range_begins_with: 'BEGINS_WITH', range_between: 'BETWEEN', range_eq: 'EQ' }
- HASH_KEY =
"HASH".freeze
- RANGE_KEY =
"RANGE".freeze
- STRING_TYPE =
"S".freeze
- NUM_TYPE =
"N".freeze
- BINARY_TYPE =
"B".freeze
- TABLE_STATUSES =
{ creating: "CREATING", updating: "UPDATING", deleting: "DELETING", active: "ACTIVE" }.freeze
- PARSE_TABLE_STATUS =
->(resp, lookup = :table) { # lookup is table for describe_table API # lookup is table_description for create_table API # because Amazon, damnit. resp.send(lookup).table_status }
Instance Attribute Summary collapse
-
#table_cache ⇒ Object
readonly
Returns the value of attribute table_cache.
Instance Method Summary collapse
-
#batch_delete_item(options) ⇒ Object
Delete many items at once from DynamoDB.
-
#batch_get_item(table_ids, options = {}) ⇒ Hash
Get many items at once from DynamoDB.
-
#batch_write_item(table_name, objects, options = {}) ⇒ Object
Puts or deletes multiple items in one or more tables.
-
#client ⇒ Object
Return the client object.
-
#connect! ⇒ Aws::DynamoDB::Client
Establish the connection to DynamoDB.
- #count(table_name) ⇒ Object
-
#create_table(table_name, key = :id, options = {}) ⇒ Object
Create a table on DynamoDB.
-
#create_table_synchronously(table_name, key = :id, options = {}) ⇒ Object
Create a table on DynamoDB synchronously.
-
#delete_item(table_name, key, options = {}) ⇒ Object
Removes an item from DynamoDB.
-
#delete_table(table_name, options = {}) ⇒ Object
Deletes an entire table from DynamoDB.
- #delete_table_synchronously(table_name, options = {}) ⇒ Object
-
#get_item(table_name, key, options = {}) ⇒ Hash
Fetches an item from DynamoDB.
-
#list_tables ⇒ Object
List all tables on DynamoDB.
-
#put_item(table_name, object, options = {}) ⇒ Object
Persists an item on DynamoDB.
-
#query(table_name, opts = {}) ⇒ Enumerable
Query the DynamoDB table.
-
#scan(table_name, scan_hash, select_opts = {}) ⇒ Enumerable
Scan the DynamoDB table.
-
#truncate(table_name) ⇒ Object
Truncates all records in the given table.
-
#update_item(table_name, key, options = {}) {|iu = ItemUpdater.new(table, key, range_key)| ... } ⇒ Object
Edits an existing item’s attributes, or adds a new item to the table if it does not already exist.
Instance Attribute Details
#table_cache ⇒ Object (readonly)
Returns the value of attribute table_cache.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 33 def table_cache @table_cache end |
Instance Method Details
#batch_delete_item(options) ⇒ Object
Delete many items at once from DynamoDB. More efficient than delete each item individually.
or
Dynamoid::AdapterPlugin::AwsSdkV2.batch_delete_item('table1' => [['hk1', 'rk2'], ['hk1', 'rk2']]]))
@todo: Provide support for passing options to underlying delete_item docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#delete_item-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 144 def batch_delete_item() .each_pair do |table_name, ids| table = describe_table(table_name) ids.each do |id| client.delete_item(table_name: table_name, key: key_stanza(table, *id)) end end nil end |
#batch_get_item(table_ids, options = {}) ⇒ Hash
Get many items at once from DynamoDB. More efficient than getting each item individually.
@todo: Provide support for passing options to underlying batch_get_item docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#batch_get_item-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 96 def batch_get_item(table_ids, = {}) request_items = Hash.new{|h, k| h[k] = []} return request_items if table_ids.all?{|k, v| v.empty?} table_ids.each do |t, ids| next if ids.empty? tbl = describe_table(t) hk = tbl.hash_key.to_s rng = tbl.range_key.to_s keys = if rng.present? Array(ids).map do |h,r| { hk => h, rng => r } end else Array(ids).map do |id| { hk => id } end end request_items[t] = { keys: keys } end results = client.batch_get_item( request_items: request_items ) ret = Hash.new([].freeze) # Default for tables where no rows are returned results.data[:responses].each do |table, rows| ret[table] = rows.collect { |r| result_item_to_hash(r) } end ret end |
#batch_write_item(table_name, objects, options = {}) ⇒ Object
Puts or deletes multiple items in one or more tables
See: docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#batch_write_item-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 61 def batch_write_item table_name, objects, = {} request_items = [] ||= {} objects.each do |o| request_items << { "put_request" => { item: o } } end begin client.batch_write_item( { request_items: { table_name => request_items, }, return_consumed_capacity: "TOTAL", return_item_collection_metrics: "SIZE" }.merge!() ) rescue Aws::DynamoDB::Errors::ConditionalCheckFailedException => e raise Dynamoid::Errors::ConditionalCheckFailedException, e end end |
#client ⇒ Object
Return the client object.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 50 def client @client end |
#connect! ⇒ Aws::DynamoDB::Client
Establish the connection to DynamoDB.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 38 def connect! @client = if Dynamoid::Config.endpoint? Aws::DynamoDB::Client.new(endpoint: Dynamoid::Config.endpoint) else Aws::DynamoDB::Client.new end @table_cache = {} end |
#count(table_name) ⇒ Object
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 523 def count(table_name) describe_table(table_name, true).item_count end |
#create_table(table_name, key = :id, options = {}) ⇒ Object
Create a table on DynamoDB. This usually takes a long time to complete.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 164 def create_table(table_name, key = :id, = {}) Dynamoid.logger.info "Creating #{table_name} table. This could take a while." read_capacity = [:read_capacity] || Dynamoid::Config.read_capacity write_capacity = [:write_capacity] || Dynamoid::Config.write_capacity secondary_indexes = .slice( :local_secondary_indexes, :global_secondary_indexes ) ls_indexes = [:local_secondary_indexes] gs_indexes = [:global_secondary_indexes] key_schema = { :hash_key_schema => { key => ([:hash_key_type] || :string) }, :range_key_schema => [:range_key] } attribute_definitions = build_all_attribute_definitions( key_schema, secondary_indexes ) key_schema = aws_key_schema( key_schema[:hash_key_schema], key_schema[:range_key_schema] ) client_opts = { table_name: table_name, provisioned_throughput: { read_capacity_units: read_capacity, write_capacity_units: write_capacity }, key_schema: key_schema, attribute_definitions: attribute_definitions } if ls_indexes.present? client_opts[:local_secondary_indexes] = ls_indexes.map do |index| index_to_aws_hash(index) end end if gs_indexes.present? client_opts[:global_secondary_indexes] = gs_indexes.map do |index| index_to_aws_hash(index) end end resp = client.create_table(client_opts) [:sync] = true if !.has_key?(:sync) && ls_indexes.present? || gs_indexes.present? until_past_table_status(table_name) if [:sync] && (status = PARSE_TABLE_STATUS.call(resp, :table_description)) && status != TABLE_STATUSES[:creating] # Response to original create_table, which, if options[:sync] # may have an outdated table_description.table_status of "CREATING" resp rescue Aws::DynamoDB::Errors::ResourceInUseException => e Dynamoid.logger.error "Table #{table_name} cannot be created as it already exists" end |
#create_table_synchronously(table_name, key = :id, options = {}) ⇒ Object
Create a table on DynamoDB synchronously. This usually takes a long time to complete. CreateTable is normally an asynchronous operation. You can optionally define secondary indexes on the new table,
as part of the CreateTable operation.
If you want to create multiple tables with secondary indexes on them,
you must create the tables sequentially.
Only one table with secondary indexes can be
in the CREATING state at any given time.
See: docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#create_table-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 240 def create_table_synchronously(table_name, key = :id, = {}) create_table(table_name, key, .merge(sync: true)) end |
#delete_item(table_name, key, options = {}) ⇒ Object
Removes an item from DynamoDB.
@todo: Provide support for various options docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#delete_item-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 253 def delete_item(table_name, key, = {}) ||= {} range_key = [:range_key] conditions = [:conditions] table = describe_table(table_name) client.delete_item( table_name: table_name, key: key_stanza(table, key, range_key), expected: expected_stanza(conditions) ) rescue Aws::DynamoDB::Errors::ConditionalCheckFailedException => e raise Dynamoid::Errors::ConditionalCheckFailedException, e end |
#delete_table(table_name, options = {}) ⇒ Object
Deletes an entire table from DynamoDB.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 273 def delete_table(table_name, = {}) resp = client.delete_table(table_name: table_name) until_past_table_status(table_name, :deleting) if [:sync] && (status = PARSE_TABLE_STATUS.call(resp, :table_description)) && status != TABLE_STATUSES[:deleting] table_cache.delete(table_name) rescue Aws::DynamoDB::Errors::ResourceInUseException => e Dynamoid.logger.error "Table #{table_name} cannot be deleted as it is in use" raise e end |
#delete_table_synchronously(table_name, options = {}) ⇒ Object
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 284 def delete_table_synchronously(table_name, = {}) delete_table(table_name, .merge(sync: true)) end |
#get_item(table_name, key, options = {}) ⇒ Hash
Provide support for various options docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#get_item-instance_method
Fetches an item from DynamoDB.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 301 def get_item(table_name, key, = {}) ||= {} table = describe_table(table_name) range_key = .delete(:range_key) item = client.get_item(table_name: table_name, key: key_stanza(table, key, range_key) )[:item] item ? result_item_to_hash(item) : nil end |
#list_tables ⇒ Object
Provide limit support docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#update_item-instance_method
List all tables on DynamoDB.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 347 def list_tables client.list_tables[:table_names] end |
#put_item(table_name, object, options = {}) ⇒ Object
Persists an item on DynamoDB.
See: docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#put_item-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 359 def put_item(table_name, object, = {}) item = {} ||= {} object.each do |k, v| next if v.nil? || (v.respond_to?(:empty?) && v.empty?) item[k.to_s] = v end begin client.put_item( { table_name: table_name, item: item, expected: expected_stanza() }.merge!() ) rescue Aws::DynamoDB::Errors::ConditionalCheckFailedException => e raise Dynamoid::Errors::ConditionalCheckFailedException, e end end |
#query(table_name, opts = {}) ⇒ Enumerable
Provide support for various other options docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#query-instance_method
Query the DynamoDB table. This employs DynamoDB’s indexes so is generally faster than scanning, but is only really useful for range queries, since it can only find by one hash key at once. Only provide one range key to the hash.
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 399 def query(table_name, opts = {}) table = describe_table(table_name) hk = (opts[:hash_key].present? ? opts[:hash_key] : table.hash_key).to_s rng = (opts[:range_key].present? ? opts[:range_key] : table.range_key).to_s q = opts.slice( :consistent_read, :scan_index_forward, :limit, :select, :index_name ) opts.delete(:consistent_read) opts.delete(:scan_index_forward) opts.delete(:limit) opts.delete(:select) opts.delete(:index_name) opts.delete(:next_token).tap do |token| break unless token q[:exclusive_start_key] = { hk => token[:hash_key_element], rng => token[:range_key_element] } end key_conditions = { hk => { # TODO: Provide option for other operators like NE, IN, LE, etc comparison_operator: EQ, attribute_value_list: [ opts.delete(:hash_value).freeze ] } } opts.each_pair do |k, v| # TODO: ATM, only few comparison operators are supported, provide support for all operators next unless(op = RANGE_MAP[k]) key_conditions[rng] = { comparison_operator: op, attribute_value_list: [ opts.delete(k).freeze ].flatten # Flatten as BETWEEN operator specifies array of two elements } end q[:table_name] = table_name q[:key_conditions] = key_conditions Enumerator.new { |y| loop do results = client.query(q) results.items.each { |row| y << result_item_to_hash(row) } if(lk = results.last_evaluated_key) q[:exclusive_start_key] = lk else break end end } end |
#scan(table_name, scan_hash, select_opts = {}) ⇒ Enumerable
Scan the DynamoDB table. This is usually a very slow operation as it naively filters all data on the DynamoDB servers.
@todo: Provide support for various options docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#scan-instance_method
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 474 def scan(table_name, scan_hash, select_opts = {}) limit = select_opts.delete(:limit) batch = select_opts.delete(:batch_size) request = { table_name: table_name } request[:limit] = batch || limit if batch || limit request[:scan_filter] = scan_hash.reduce({}) do |memo, kvp| memo[kvp[0].to_s] = { attribute_value_list: [kvp[1]], # TODO: Provide support for all comparison operators comparison_operator: EQ } memo end if scan_hash.present? Enumerator.new do |y| # Batch loop, pulls multiple requests until done using the start_key loop do results = client.scan(request) results.data[:items].each { |row| y << result_item_to_hash(row) } if((lk = results[:last_evaluated_key]) && batch) request[:exclusive_start_key] = lk else break end end end end |
#truncate(table_name) ⇒ Object
Truncates all records in the given table
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 511 def truncate(table_name) table = describe_table(table_name) hk = table.hash_key rk = table.range_key scan(table_name, {}, {}).each do |attributes| opts = {} opts[:range_key] = attributes[rk.to_sym] if rk delete_item(table_name, attributes[hk], opts) end end |
#update_item(table_name, key, options = {}) {|iu = ItemUpdater.new(table, key, range_key)| ... } ⇒ Object
Provide support for various options docs.aws.amazon.com/sdkforruby/api/Aws/DynamoDB/Client.html#update_item-instance_method
Edits an existing item’s attributes, or adds a new item to the table if it does not already exist. You can put, delete, or add attribute values
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# File 'lib/dynamoid/adapter_plugin/aws_sdk_v2.rb', line 321 def update_item(table_name, key, = {}) range_key = .delete(:range_key) conditions = .delete(:conditions) table = describe_table(table_name) yield(iu = ItemUpdater.new(table, key, range_key)) raise "non-empty options: #{}" unless .empty? begin result = client.update_item(table_name: table_name, key: key_stanza(table, key, range_key), attribute_updates: iu.to_h, expected: expected_stanza(conditions), return_values: "ALL_NEW" ) result_item_to_hash(result[:attributes]) rescue Aws::DynamoDB::Errors::ConditionalCheckFailedException => e raise Dynamoid::Errors::ConditionalCheckFailedException, e end end |