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Catch error on invalid cache data

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This commit is contained in:
FinnStutzenstein 2020-03-19 14:00:56 +01:00
parent 54dd97399e
commit 73eff81edd
1 changed files with 20 additions and 4 deletions
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24
client/src/app/core/core-services/data-store.service.ts
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@ -247,7 +247,15 @@ export class DataStoreUpdateManagerService {
slot.DS.triggerModifiedObservable();
// serve next slot request
this.serveNextSlot();
}
public dropUpdateSlot(): void {
this.currentUpdateSlot = null;
this.serveNextSlot();
}
private serveNextSlot(): void {
if (this.updateSlotRequests.length > 0) {
const request = this.updateSlotRequests.pop();
request.resolve();
@ -347,14 +355,21 @@ export class DataStoreService {
/**
* Gets the DataStore from cache and instantiate all models out of the serialized version.
* If something fails, the DS is cleared, so fresh data can be requrested from the server.
*
* @returns The max change id.
*/
public async initFromStorage(): Promise<number> {
// This promise will be resolved with cached datastore.
const store = await this.storageService.get<JsonStorage>(DataStoreService.cachePrefix + 'DS');
if (store) {
const updateSlot = await this.DSUpdateManager.getNewUpdateSlot(this);
if (!store) {
await this.clear();
return this.maxChangeId;
}
const updateSlot = await this.DSUpdateManager.getNewUpdateSlot(this);
try {
// There is a store. Deserialize it
this.jsonStore = store;
this.modelStore = this.deserializeJsonStore(this.jsonStore);
@ -374,7 +389,8 @@ export class DataStoreService {
});
this.DSUpdateManager.commit(updateSlot, maxChangeId, true);
} else {
} catch (e) {
this.DSUpdateManager.dropUpdateSlot();
await this.clear();
}
return this.maxChangeId;