gecko-dev/dom/datastore/DataStoreDB.jsm

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
'use strict';
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
this.EXPORTED_SYMBOLS = ['DataStoreDB'];
function debug(s) {
// dump('DEBUG DataStoreDB: ' + s + '\n');
}
const DATASTOREDB_VERSION = 1;
const DATASTOREDB_OBJECTSTORE_NAME = 'DataStoreDB';
const DATASTOREDB_REVISION = 'revision';
const DATASTOREDB_REVISION_INDEX = 'revisionIndex';
Cu.import('resource://gre/modules/IndexedDBHelper.jsm');
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
"@mozilla.org/uuid-generator;1",
"nsIUUIDGenerator");
this.DataStoreDB = function DataStoreDB() {}
DataStoreDB.prototype = {
__proto__: IndexedDBHelper.prototype,
upgradeSchema: function(aTransaction, aDb, aOldVersion, aNewVersion) {
debug('updateSchema');
aDb.createObjectStore(DATASTOREDB_OBJECTSTORE_NAME, { autoIncrement: true });
let store = aDb.createObjectStore(DATASTOREDB_REVISION,
{ autoIncrement: true,
keyPath: 'internalRevisionId' });
store.createIndex(DATASTOREDB_REVISION_INDEX, 'revisionId', { unique: true });
},
init: function(aOwner, aName) {
let dbName = aName + '|' + aOwner;
this.initDBHelper(dbName, DATASTOREDB_VERSION,
[DATASTOREDB_OBJECTSTORE_NAME, DATASTOREDB_REVISION]);
},
txn: function(aType, aCallback, aErrorCb) {
debug('Transaction request');
this.newTxn(
aType,
aType == 'readonly'
? [ DATASTOREDB_OBJECTSTORE_NAME ] : [ DATASTOREDB_OBJECTSTORE_NAME, DATASTOREDB_REVISION ],
function(aTxn, aStores) {
aType == 'readonly' ? aCallback(aTxn, aStores[0], null) : aCallback(aTxn, aStores[0], aStores[1]);
},
function() {},
aErrorCb
);
},
cursorTxn: function(aCallback, aErrorCb) {
debug('Cursor transaction request');
this.newTxn(
'readonly',
[ DATASTOREDB_OBJECTSTORE_NAME, DATASTOREDB_REVISION ],
function(aTxn, aStores) {
aCallback(aTxn, aStores[0], aStores[1]);
},
function() {},
aErrorCb
);
},
revisionTxn: function(aType, aCallback, aErrorCb) {
debug("Transaction request");
this.newTxn(
aType,
DATASTOREDB_REVISION,
aCallback,
function() {},
aErrorCb
);
},
addRevision: function(aStore, aKey, aType, aSuccessCb) {
debug("AddRevision: " + aKey + " - " + aType);
let revisionId = uuidgen.generateUUID().toString();
let request = aStore.put({ revisionId: revisionId, objectId: aKey, operation: aType });
request.onsuccess = function() {
aSuccessCb(revisionId);
}
},
getInternalRevisionId: function(aRevisionId, aStore, aSuccessCb) {
debug('GetInternalRevisionId');
let request = aStore.index(DATASTOREDB_REVISION_INDEX).getKey(aRevisionId);
request.onsuccess = function(aEvent) {
aSuccessCb(aEvent.target.result);
}
},
clearRevisions: function(aStore, aSuccessCb) {
debug("ClearRevisions");
let request = aStore.clear();
request.onsuccess = function() {
aSuccessCb();
}
},
delete: function() {
debug('delete');
this.close();
indexedDB.deleteDatabase(this.dbName);
debug('database deleted');
}
}