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4 <title>Code coverage report for DatabaseConnection.ts</title>
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18 <h1>
19 <a href="index.html">All files</a> DatabaseConnection.ts
20 </h1>
21 <div class='clearfix'>
22 <div class='fl pad1y space-right2'>
23 <span class="strong">100% </span>
24 <span class="quiet">Statements</span>
25 <span class='fraction'>29/29</span>
26 </div>
27 <div class='fl pad1y space-right2'>
28 <span class="strong">100% </span>
29 <span class="quiet">Branches</span>
30 <span class='fraction'>7/7</span>
31 </div>
32 <div class='fl pad1y space-right2'>
33 <span class="strong">100% </span>
34 <span class="quiet">Functions</span>
35 <span class='fraction'>12/12</span>
36 </div>
37 <div class='fl pad1y space-right2'>
38 <span class="strong">100% </span>
39 <span class="quiet">Lines</span>
40 <span class='fraction'>29/29</span>
41 </div>
42 </div>
43 <p class="quiet">
44 Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
45 </p>
46 </div>
47 <div class='status-line high'></div>
48<pre><table class="coverage">
49<tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a>
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57<a name='L9'></a><a href='#L9'>9</a>
58<a name='L10'></a><a href='#L10'>10</a>
59<a name='L11'></a><a href='#L11'>11</a>
60<a name='L12'></a><a href='#L12'>12</a>
61<a name='L13'></a><a href='#L13'>13</a>
62<a name='L14'></a><a href='#L14'>14</a>
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503<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">// Copyright (C) 2017 Norman Breau
504&nbsp;
505// This program is free software: you can redistribute it and/or modify
506// it under the terms of the GNU General Public License as published by
507// the Free Software Foundation, either version 3 of the License, or
508// (at your option) any later version.
509&nbsp;
510// This program is distributed in the hope that it will be useful,
511// but WITHOUT ANY WARRANTY; without even the implied warranty of
512// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
513// GNU General Public License for more details.
514&nbsp;
515// You should have received a copy of the GNU General Public License
516// along with this program. If not, see &lt;http://www.gnu.org/licenses/&gt;.
517&nbsp;
518import {
519 getApplicationLogger,
520 getInstance
521} from './instance';
522import {Readable} from 'stream';
523import {IDatabaseConnection} from './IDatabaseConnection';
524&nbsp;
525export const LINGER_WARNING: number = 10000;
526export const DEFAULT_QUERY_TIMEOUT: number = 3600000;
527&nbsp;
528/**
529 * Do not call `new Database` directly. Use `Database.getConnection` to create a `DatabaseConnection` object.
530 * @abstract
531 * @implements `IDatabaseConnection`
532 * @class
533 */
534export abstract class DatabaseConnection implements IDatabaseConnection {
535 private api: any;
536 private readOnly: boolean;
537 private _timeout: number;
538 private _lingerTimer: NodeJS.Timer;
539 private _instantiationStack: string;
540&nbsp;
541 public constructor(api: any, isReadOnly: boolean, instantiationStack: string) {
542 this.api = api;
543 this.readOnly = isReadOnly;
544 this._instantiationStack = instantiationStack;
545&nbsp;
546 this._timeout = getInstance().getConfig().query_timeout;
547 if (isNaN(this._timeout)) {
548 this._timeout = DEFAULT_QUERY_TIMEOUT;
549 }
550&nbsp;
551 this._armLingerWarning();
552 }
553&nbsp;
554 private _triggerLingerWarning(): void {
555 getApplicationLogger().warn(`Database connection has lingered for ${LINGER_WARNING}ms of inactivity.\n\n${this._instantiationStack}`);
556 }
557&nbsp;
558 /**
559 * Gets the callback stacktrace to determine what opened
560 * this connection. Useful for debugging lingering connections.
561 * @returns string - A stacktrace
562 */
563 public getInstantiationStack(): string {
564 return this._instantiationStack;
565 }
566&nbsp;
567 private _armLingerWarning() {
568 if (this._lingerTimer) {
569 clearTimeout(this._lingerTimer);
570 }
571&nbsp;
572 this._lingerTimer = setTimeout(() =&gt; {
573 this._triggerLingerWarning();
574 }, LINGER_WARNING);
575 }
576&nbsp;
577 /**
578 * Gets the underlying Database API
579 * @returns any
580 */
581 public getAPI(): any {
582 return this.api;
583 }
584&nbsp;
585 /**
586 * Returns true if connection was created without
587 * write access
588 * @returns boolean
589 */
590 public isReadOnly(): boolean {
591 return this.readOnly;
592 }
593&nbsp;
594 /**
595 * Sets the timeout of this connectino
596 *
597 * @param timeout in milliseconds
598 */
599 public setTimeout(timeout: number): void {
600 if (isNaN(timeout)) {
601 throw new TypeError('setTimeout expects a number in parameter 1.');
602 }
603&nbsp;
604 this._timeout = timeout;
605 }
606&nbsp;
607 /**
608 * Returns the current timeout setting
609 * @returns number in milliseconds
610 */
611 public getTimeout(): number {
612 return this._timeout;
613 }
614&nbsp;
615 /**
616 * Queries the database for a dataset.
617 *
618 * @param query The database query
619 * @param params Parameters for the query
620 * @async
621 * @returns Promise&lt;any&gt;
622 */
623 public query(query: string, params?: any): Promise&lt;any&gt; {
624 this._armLingerWarning();
625 return this._query(query, params);
626 }
627&nbsp;
628 /**
629 *
630 * @param query The database query
631 * @param params Parameters for the query
632 * @param streamOptions Stream options
633 * @returns Readable
634 */
635 public stream(query: string, params?: any, streamOptions?: any): Readable {
636 this._armLingerWarning();
637 return this._stream(query, params, streamOptions);
638 }
639&nbsp;
640 /**
641 * Closes the connection. May error if connection has an active transaction.
642 * if `forceClose` boolean is true, it will force close the connection, regardless
643 * of transaction state.
644 *
645 * @param forceClose optional boolean
646 * @async
647 * @returns Promise&lt;void&gt;
648 */
649 public close(forceClose: boolean = false): Promise&lt;void&gt; {
650 clearTimeout(this._lingerTimer);
651 return this._close(forceClose);
652 }
653&nbsp;
654 /**
655 * Implementation method to start a transaction.
656 *
657 * @abstract
658 * @async
659 * @returns Promise&lt;void&gt;
660 */
661 public abstract startTransaction(): Promise&lt;void&gt;;
662&nbsp;
663 /**
664 * Implementation method to determine if the connection is in an active transaction.
665 *
666 * @abstract
667 * @returns boolean
668 */
669 public abstract isTransaction(): boolean;
670&nbsp;
671 /**
672 * Ends a transaction. if `requiresRollback` is `true`, then `rollback()` is invoked. Otherwise, `commit()` is invoked.
673 *
674 * @abstract
675 * @async
676 * @param requiresRollback optional boolean
677 * @returns Promise&lt;void&gt;
678 */
679 public abstract endTransaction(requiresRollback?: boolean): Promise&lt;void&gt;;
680
681 /**
682 * Commits a transaction. This will end a transaction.
683 *
684 * @abstract
685 * @async
686 * @returns Promise&lt;void&gt;
687 */
688 public abstract commit(): Promise&lt;void&gt;;
689&nbsp;
690 /**
691 * Rollsback a transaction. This will end a transaction.
692 *
693 * @abstract
694 * @async
695 * @returns Promise&lt;void&gt;
696 */
697 public abstract rollback(): Promise&lt;void&gt;;
698&nbsp;
699 /**
700 * Implementation to close the connection, if `forceClose` is true, close the connection no matter what.
701 * Silently error if it means the connection is closed.
702 *
703 * @param forceClose boolean, if `true`, should close the connection no matter what.
704 * @async
705 * @returns Promise&lt;void&gt;
706 */
707 protected abstract _close(forceClose: boolean): Promise&lt;void&gt;;
708
709 /**
710 * Implementation method to return a dataset from the database
711 *
712 * @param query The database query
713 * @param params The query parameters
714 * @async
715 * @returns Promise
716 */
717 protected abstract _query(query: string, params?: any): Promise&lt;any&gt;;
718&nbsp;
719 /**
720 * Implementation method to return a dataset from the database like `query()`,
721 * but returns a `Readable` stream instead.
722 *
723 * @param query The database query
724 * @param params The query parameters
725 * @param streamOptions `Readable` stream options
726 * @returns `Readable`
727 */
728 protected abstract _stream(query: string, params?: any, streamOptions?: any): Readable;
729}
730&nbsp;</pre></td></tr>
731</table></pre>
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