mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-26 17:46:26 +03:00
Jacob Trimble
c81389741f
A coming update to the Google eslint config will require using "const" over "let". This makes that one change to isolate the big changes. Change-Id: I7d0974c3ae15c53cc45a6b07bf9f6586e2d34aca
100 lines
2.9 KiB
JavaScript
100 lines
2.9 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.offline.indexeddb.DBConnection');
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goog.require('shaka.offline.indexeddb.DBOperation');
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goog.require('shaka.util.ArrayUtils');
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/**
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* DBConnection is used to manage an IndexedDB connection. It can create new
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* operations. If the connection is killed (via |destroy|) all pending
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* operations will be cancelled.
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*/
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shaka.offline.indexeddb.DBConnection = class {
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/**
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* @param {IDBDatabase} connection A connection to an IndexedDB instance.
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*/
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constructor(connection) {
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/** @private {IDBDatabase} */
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this.connection_ = connection;
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/** @private {!Array.<shaka.offline.indexeddb.DBOperation>} */
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this.pending_ = [];
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}
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/**
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* @return {!Promise}
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*/
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destroy() {
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return Promise.all(this.pending_.map((op) => {
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return op.abort();
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}));
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}
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/**
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* @param {string} store The name of the store that the operation should
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* occur on.
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* @return {!shaka.offline.indexeddb.DBOperation}
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*/
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startReadOnlyOperation(store) {
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return this.startOperation_(store, 'readonly');
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}
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/**
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* @param {string} store The name of the store that the operation should
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* occur on.
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* @return {!shaka.offline.indexeddb.DBOperation}
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*/
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startReadWriteOperation(store) {
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return this.startOperation_(store, 'readwrite');
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}
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/**
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* @param {string} store The name of the store that the operation should
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* occur on.
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* @param {string} type The type of operation being performed on the store.
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* This determines what commands may be performed. This
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* can either be "readonly" or "readwrite".
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* @return {!shaka.offline.indexeddb.DBOperation}
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* @private
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*/
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startOperation_(store, type) {
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const transaction = this.connection_.transaction([store], type);
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const operation =
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new shaka.offline.indexeddb.DBOperation(transaction, store);
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this.pending_.push(operation);
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// Once the operation is done (regardless of outcome) stop tracking it.
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operation.promise().then(
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() => this.stopTracking_(operation),
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() => this.stopTracking_(operation)
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);
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return operation;
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}
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/**
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* @param {!shaka.offline.indexeddb.DBOperation} operation
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* @private
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*/
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stopTracking_(operation) {
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shaka.util.ArrayUtils.remove(this.pending_, operation);
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}
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};
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