193 lines
4.9 KiB
TypeScript
193 lines
4.9 KiB
TypeScript
/**
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* Delta Processor
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*
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* Copyright (C) 2010-2019 R-T Specialty, LLC.
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*
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* This file is part of the Liza Data Collection Framework.
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*
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* liza is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import { DeltaDao } from "../system/db/DeltaDao";
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import { MongoDeltaType } from "../system/db/MongoDeltaDao";
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import { DeltaResult } from "../bucket/delta";
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import { DocumentId } from "../document/Document";
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import { AmqpPublisher } from "./AmqpPublisher";
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/**
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* Process deltas for a quote and publish to a queue
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*/
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export class DeltaProcessor
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{
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/** The ratedata delta type */
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readonly DELTA_RATEDATA: MongoDeltaType = 'ratedata';
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/** The data delta type */
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readonly DELTA_DATA: MongoDeltaType = 'data';
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/**
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* Initialize processor
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*
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* @param _collection Mongo collection
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*/
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constructor(
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private readonly _dao: DeltaDao,
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private readonly _publisher: AmqpPublisher,
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) {}
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/**
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* Process unpublished deltas
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*/
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process(): void
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{
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let self = this;
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this._dao.getUnprocessedDocuments( function( docs )
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{
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docs.forEach( doc => {
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const deltas = self.getTimestampSortedDeltas( doc );
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deltas.forEach( delta => {
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self._publisher.publish( delta );
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});
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const last_updated_ts = doc.lastUpdated;
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const doc_id: DocumentId = doc.id;
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self._dao.markDocumentAsProcessed(
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doc_id,
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last_updated_ts,
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function( err, markedSuccessfully )
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{
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console.log( err, markedSuccessfully );
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},
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);
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});
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});
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}
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/**
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* Get sorted list of deltas
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*
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* @param doc - the document
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*
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* @return a list of deltas sorted by timestamp
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*/
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getTimestampSortedDeltas(
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doc: any,
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): DeltaResult<any>[]
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{
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const data_deltas = this.getDeltas( doc, this.DELTA_RATEDATA );
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const ratedata_deltas = this.getDeltas( doc, this.DELTA_DATA );
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const deltas = data_deltas.concat( ratedata_deltas );
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deltas.sort( this._sortByTimestamp );
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return deltas;
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}
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/**
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* Get trimmed delta list
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*
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* @param doc - the document
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* @param type - the delta type to get
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*
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* @return a trimmed list of deltas
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*/
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getDeltas(
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doc: any,
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type: MongoDeltaType,
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): DeltaResult<any>[]
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{
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// Get objects so we can get the index by type
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const deltas_obj = doc.rdelta || {};
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// Get type specific deltas
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let last_published_index = 0;
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if ( doc.lastPublishDelta )
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{
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const last_published_indexes = doc.lastPublishDelta;
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last_published_index = last_published_indexes[ type ] || 0;
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}
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const deltas: DeltaResult<any>[] = deltas_obj[ type ] || [];
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// Only return the unprocessed deltas
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const deltas_trimmed = deltas.slice( last_published_index );
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// Mark each delta with its type
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deltas_trimmed.forEach( delta => {
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delta.type = type;
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});
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return deltas_trimmed;
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}
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/**
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* Sort an array of deltas by timestamp
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*
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* @param a - The first delta to compare
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* @param a - The second delta to compare
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*
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* @return a sort value
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*/
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private _sortByTimestamp(
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a: DeltaResult<any>,
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b: DeltaResult<any>,
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): number
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{
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if ( a.timestamp < b.timestamp )
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{
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return -1;
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}
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if ( a.timestamp > b.timestamp ) {
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return 1;
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}
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return 0;
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}
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/**
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* Generate amqp config from environment variables
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*
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* @returns the amqp configuration
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*/
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// generateConfigFromEnv(): AmqpConfig
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// {
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// return <AmqpConfig>{
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// "protocol": "amqp",
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// "hostname": process.env.hostname,
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// "port": process.env.port,
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// "username": process.env.username,
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// "password": process.env.password,
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// "locale": "en_US",
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// "frameMax": 0,
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// "heartbeat": 0,
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// "vhost": process.env.vhost,
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// "exchange": process.env.exchange,
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// };
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// }
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} |