66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
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'use strict';
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const Connection = require('../index.js').Connection;
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class PoolConnection extends Connection {
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constructor(pool, options) {
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super(options);
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this._pool = pool;
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// When a fatal error occurs the connection's protocol ends, which will cause
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// the connection to end as well, thus we only need to watch for the end event
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// and we will be notified of disconnects.
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// REVIEW: Moved to `once`
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this.once('end', () => {
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this._removeFromPool();
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});
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this.once('error', () => {
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this._removeFromPool();
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});
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}
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release() {
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if (!this._pool || this._pool._closed) {
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return;
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}
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this._pool.releaseConnection(this);
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}
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promise(promiseImpl) {
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const PromisePoolConnection = require('../promise').PromisePoolConnection;
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return new PromisePoolConnection(this, promiseImpl);
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}
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end() {
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const err = new Error(
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'Calling conn.end() to release a pooled connection is ' +
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'deprecated. In next version calling conn.end() will be ' +
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'restored to default conn.end() behavior. Use ' +
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'conn.release() instead.'
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);
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this.emit('warn', err);
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// eslint-disable-next-line no-console
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console.warn(err.message);
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this.release();
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}
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destroy() {
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this._removeFromPool();
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super.destroy();
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}
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_removeFromPool() {
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if (!this._pool || this._pool._closed) {
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return;
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}
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const pool = this._pool;
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this._pool = null;
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pool._removeConnection(this);
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}
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}
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PoolConnection.statementKey = Connection.statementKey;
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module.exports = PoolConnection;
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// TODO: Remove this when we are removing PoolConnection#end
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PoolConnection.prototype._realEnd = Connection.prototype.end;
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