Data Storage

Each atomic service can have its own local cache. You can read, write, and clear a local cache through the following APIs.

API	Description
has.setStorage	Stores data in the specified key in the local cache.
has.setStorageSync	Synchronous version of has.setStorage.
has.getStorage	Obtains the cache of the specified key.
has.getStorageSync	Synchronous version of has.getStorage.
has.clearStorage	Clears the local cache.
has.clearStorageSync	Synchronous version of has.clearStorage.
has.removeStorage	Removes the cache of the specified key.
has.removeStorageSync	Synchronous version of has.removeStorageSync.
has.getStorageInfo	Obtains cache information.
has.getStorageInfoSync	Synchronous version of has.getStorageInfo.

Example:

has.setStorageSync('key1', 'test-data');
let res = has.getStorageSync('key1');
console.log(`res = ${res}`);

Isolation Policy

Each user is allocated 10 MB of storage capacity for the same atomic service.

Storage is isolated by user, meaning that on the same device, user A cannot read data of user B. Atomic services are also mutually isolated, preventing cross-service data read and write.

Cleanup Policy

The timing for clearing the local cache is the same as that for clearing an installation package. The local cache is cleared only when the installation package is cleared.

目录

Data Storage

Isolation Policy

Cleanup Policy