JP2016500168A - アーカイブされたリレーションを有する連続クエリの管理 - Google Patents
アーカイブされたリレーションを有する連続クエリの管理 Download PDFInfo
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Abstract
Description
本願は、2013年3月14日に出願され「Managing Continuous Queries with Archived Relations(アーカイブされたリレーションを有する連続クエリの管理)」と題された米国特許出願第13/829,958号(代理人整理番号88325−859813(128010US))、2013年3月14日に出願され「Configurable Data Windows for Archived Relations(アーカイブされたリレーションのための構成可能なデータウィンドウ)」と題された米国特許出願第13/830,129号(代理人整理番号88325−859814(128020US))、および、2012年9月28日に出願され「Real Time Business Event Analysis and Monitoring(リアルタイムビジネスイベント分析およびモニタリング)」と題された米国仮出願第61/707,641号に基づく優先権と利益を主張し、すべての目的のために各出願の内容全体を本明細書に引用により援用する。
従来のデータベースシステムにおいて、データは、通常はテーブルの形態で1つ以上のデータベースに格納される。格納されたデータはその後、構造化照会言語(SQL)等のデータ管理言語を用いてクエリされ操作される。たとえば、SQLクエリは、データベースに格納されているデータのうちの関連データを識別するために定義し実行することができる。したがって、SQLクエリは、データベースに格納されている有限集合のデータに対して実行される。さらに、SQLクエリが実行されるとき、SQLは有限のデータ集合に対して一度実行されて有限の静的結果をもたらす。このように、データベースは、格納されている有限のデータ集合に対してクエリが実行されるよう最適に作成されている。
いくつかの例において、連続クエリの中のアーカイブされたリレーションを管理するためのシステムが提供される。このシステムは、メモリと、このメモリにアクセスし命令を実行することにより、少なくともデータストリームを識別するクエリを識別するように構成された1つ以上のプロセッサとを含み得る。上記命令を実行することにより、履歴データの少なくとも一部を用いて上記クエリを初期化してもよい。加えて、上記命令を実行することにより、上記データストリームおよび上記履歴データの一部に少なくとも一部基づいて上記クエリを評価してもよい。場合によっては、上記クエリは、到来する上記データストリームのリアルタイムデータまたは上記データストリームのアーカイブされたリレーションを処理するように構成された連続クエリを含み得る。上記リアルタイムデータは、少なくともビジネスイベントデータを含み得る。加えて、いくつかの例において、上記データストリームは、ウィンドウを用いて構成されたリレーションを含み得る。ウィンドウは、このウィンドウの中のデータストリームの一部を参照するためのものである。上記ウィンドウは、時間の経過とともにデータストリームに沿って移動するように構成してもよい。いくつかの局面において、上記履歴データは、上記クエリの初期化後のある時点におけるデータストリームに含まれなくてもよい。上記クエリはさらに上記履歴データを識別してもよい。加えて、上記履歴データは、上記クエリの初期化前のある時点におけるデータストリームからのビジネスイベントデータを含み得る。いくつかの局面において、上記クエリを評価することは、クエリの演算子を表わすノードを用いてクエリグラフを少なくとも形成することを含み得る。加えて、上記1つ以上のプロセッサはさらに、上記複数の命令を実行することにより、上記クエリグラフをトポロジーの順序で少なくともトラバースするように構成されてもよい。加えて、上記1つ以上のプロセッサはさらに、上記複数の命令を実行することにより、上記クエリグラフにおいて識別された最下位のステートフル(stateful)演算子における少なくとも履歴データを用いて上記クエリを少なくとも初期化するように構成されてもよい。
以下の説明では、さまざまな実施形態が説明される。これら実施形態が十分に理解されるよう、特定の構成および詳細事項が説明のために記載される。しかしながら、これらの具体的な詳細事項がなくとも実施形態を実行し得ることも当業者には明らかであろう。さらに、記載されている実施形態が不明瞭にならぬよう、周知の特徴は省略または簡略化される場合がある。
(<timestamp_N>,<NVDA,4>)
(<timestamp_N+1>,<ORCL,62>)
(<timestamp_N+2>,<PCAR,38>)
(<timestamp_N+3>,<SPOT,53>)
(<timestamp_N+4>,<PDCO,44>)
(<timestamp_N+5>,<PTEN,50>)
...
上記ストリームにおけるストリーム要素(<timestamp_N+1>,<ORCL,62>)の場合、イベントは、「stock_symbol」(株式銘柄)および「stock_value」(株価)という属性を有する<ORCL,62>である。このストリーム要素に関連するタイムスタンプは「timestamp_N+1」である。このように、連続イベントストリームは、イベントのフローであり、各イベントは同じ一連の属性を有する。
・BI分析サーバに対するサービスをCQLエンジンゲートウェイとしてリモート処理する。
・イベントソース/シンクアダプタ。
・論理的SQLに加えてCQL拡張からデータ定義言語(DDL)を生成する。
・すべての種類の連続クエリおよび実装選択に対して統一されたモデルを提供する。
・メタデータを維持し再始動能力をサポートする。
・高アベイラビリティおよびスケーラビリティのサポート。
4.同じJTAトランザクション内で他のコールがなされた場合、上記動作1は、添付された」トランザクションコンテキストをピックアップして動作2に進めばよい。
a)実行されたデータオブジェクト動作をデータベースにコミットしてもよい。
c)トランザクションコンテキストのマージをコミットしてもよい。
a)実行されたデータオブジェクト動作をロールバックしてもよい。
c)BEAMトランザクションコンテキストのマージをロールバックしてもよい。
(1)入力および出力ストリームならびにリレーションソースおよびシンクに対して直接インターフェイスする1つ以上のアダプタ。アダプタは、入力および出力ストリームプロトコルを理解するように構成され、イベントデータを、アプリケーションプロセッサによってクエリできる正規化された形態に変換する役割を果たす。アダプタは、正規化されたイベントデータを、チャネルまたは出力ストリームおよびリレーションシンクに送ってもよい。イベントアダプタは、さまざまなデータソースおよびシンクに対して定めることができる。
(2)イベント処理の終点として機能する1つ以上のチャネル。特に、チャネルは、イベントデータを、イベント処理エージェントがそれに対して働くことが可能になる時点まで、キューに入れておく役割を果たす。
(3)1つ以上のアプリケーションプロセッサ(またはイベント処理エージェント)が、チャネルからの正規化されたイベントデータを消費し、クエリを用いてこれを処理することで顕著なイベントを選択し、選択された顕著なイベントを出力チャネルに送る(またはコピーする)ように、構成される。
(4)1つ以上のビーン(bean)が、出力チャネルをリッスンするように構成され、出力チャネルへの新たなイベントの挿入によってトリガされる。いくつかの実施形態において、このユーザコードは、plain-old-Java-object(POJO)である。ユーザアプリケーションは、一組の、JMS、ウェブサービス、およびファイルライタ(writer)といった外部サービスを利用することによって、生成されたイベントを外部イベントシンクに送ることができる。
(5)イベントビーンは、出力チャネルをリッスンするために登録されてもよく、出力チャネルへの新たなイベントの挿入によってトリガされる。いくつかの実施形態において、このユーザコードは、Oracle CEPイベントビーンAPIを用い、このビーンをOracle CEPによって管理できるようにしてもよい。
Claims (26)
- システムであって、
少なくともデータストリームを識別するクエリを識別するための手段と、
履歴データの少なくとも一部を用いて前記クエリを初期化するための手段と、
前記データストリームおよび前記履歴データの一部に少なくとも一部基づいて前記クエリを評価するための手段とを備える、システム。 - 前記クエリは、到来する前記データストリームのリアルタイムデータまたは前記データストリームのアーカイブされたリレーションを処理するように構成された連続クエリを含む、請求項1に記載のシステム。
- 前記リアルタイムデータは、少なくともビジネスイベントデータを含む、請求項2に記載のシステム。
- 前記データストリームは、ウィンドウを用いて構成されたリレーションを含み、前記ウィンドウは、前記ウィンドウの中の前記データストリームの一部を参照するためのものである、請求項1または3のいずれかに記載のシステム。
- 前記ウィンドウは、時間の経過とともに前記データストリームに沿って移動するように構成される、請求項4に記載のシステム。
- 前記履歴データは、前記クエリの初期化後のある時点における前記データストリームに含まれない、請求項1〜5のいずれか一項に記載のシステム。
- 前記クエリはさらに前記履歴データを識別する、請求項1〜6のいずれか一項に記載のシステム。
- 前記履歴データは、前記クエリの初期化前のある時点における前記データストリームからのビジネスイベントデータを含む、請求項1〜7のいずれか一項に記載のシステム。
- 前記クエリを評価することは、前記クエリの演算子を表わすノードを用いてクエリグラフを少なくとも形成することを含む、請求項1〜8のいずれか一項に記載のシステム。
- 前記ノードのうちの少なくとも1つはウィンドウサイズを識別する、請求項9に記載のシステム。
- 複数の命令を実行することにより、前記クエリグラフをトポロジーの順序で少なくともトラバースするための手段をさらに備える、請求項9または10に記載のシステム。
- 前記クエリグラフにおいて識別された最下位のステートフル演算子における少なくとも前記履歴データを用いて前記クエリを初期化するための手段をさらに備える、請求項11に記載のシステム。
- 構成可能なウィンドウサイズを識別するための手段をさらに備える、請求項11に記載のシステム。
- 前記クエリは、前記構成可能なウィンドウサイズに少なくとも一部基づいて初期化される、請求項13に記載のシステム。
- 前記クエリを評価することは、構成可能なウィンドウサイズに少なくとも一部基づいて前記データストリームに対して前記クエリを少なくとも適用することを含む、請求項1に記載のシステム。
- 前記データストリームは、第2のウィンドウの中の前記データストリームの一部を参照するための第2の構成可能なウィンドウサイズを用いて構成されたリレーションを含み、前記第2のウィンドウのサイズは、第2の構成可能なウィンドウサイズに少なくとも一部基づく、請求項1〜15のいずれか一項に記載のシステム。
- 第2のウィンドウは、時間の経過とともに前記データストリームに沿って移動するように構成される、請求項1に記載のシステム。
- 1つ以上のプロセッサにより実行可能な複数の命令を格納するコンピュータ読取可能なプログラムであって、前記複数の命令は、
データストリームを処理するように構成された連続クエリを受けることを、前記1つ以上のプロセッサに行なわせる命令を含み、前記連続クエリは、前記データストリームの識別子および履歴データの識別子のうちの少なくとも1つを含み、
前記連続クエリに少なくとも一部基づいてクエリグラフを生成することを、前記1つ以上のプロセッサに行なわせる命令と、
履歴データの少なくとも一部を用いて前記連続クエリを初期化することを、前記1つ以上のプロセッサに行なわせる命令と、
前記データストリームに関して前記履歴データに少なくとも一部基づいて前記連続クエリを評価することを、前記1つ以上のプロセッサに行なわせる命令とを含む、コンピュータ読取可能なプログラム。 - 前記データストリームおよび前記履歴データのうちの少なくとも一方は、前記連続クエリのデータ定義言語アノテーションによって識別される、請求項18に記載のコンピュータ読取可能なプログラム。
- 前記データ定義言語アノテーションは、前記履歴データの場所、前記データストリームのソース、前記データストリームに関連するデータオブジェクト、前記連続クエリの処理に関連する動作情報、前記履歴データに対応するデータベースの関連する1つ以上の列、前記連続クエリの出力に対応するデータオブジェクト、および、前記連続クエリの出力を提供するための場所のうちの少なくとも1つを識別する、請求項19に記載のコンピュータ読取可能なプログラム。
- 前記クエリグラフは、前記連続クエリの演算子を表わす少なくともノードを含む、請求項18に記載のコンピュータ読取可能なプログラム。
- 前記連続クエリは、前記クエリグラフをトポロジーの順でトラバースする間に、前記クエリグラフのステートフル演算子における前記履歴データの少なくとも一部を用いて初期化される、請求項18に記載のコンピュータ読取可能なプログラム。
- 方法であって、
ビジネスイベントデータのストリームを処理するように構成された連続クエリを受けることを含み、前記連続クエリは、前記ストリームの識別子と前記ストリームに関連する履歴データの識別子とを含み、
前記連続クエリに少なくとも一部基づいてクエリグラフを生成することを含み、前記クエリグラフは、前記連続クエリの演算子を表わす少なくともノードを含み、
前記クエリグラフをトラバースして最下位のステートフル演算子を識別することと、
前記識別された最下位のステートフル演算子における履歴データの少なくとも一部を用いて前記連続クエリを初期化することと、
前記ストリームに関して前記履歴データに少なくとも一部基づいて前記連続クエリを評価することとを含む、方法。 - 前記履歴データは、前記ストリームの前の時点からのビジネスイベントデータを含む、請求項23に記載の方法。
- 前記連続クエリの演算子に少なくとも一部基づいて前記連続クエリを初期化するために用いる前記履歴データの最適量を決定することをさらに含む、請求項23に記載の方法。
- 前記ステートフル演算子は、前記連続クエリの少なくとも1つのノードの評価に少なくとも一部基づいて識別される、請求項23に記載の方法。
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