The Distributed Data Object Management Framework is an object-oriented memory data management framework with distributed capabilities that meet the collaborative requirements of data objects across multiple devices in the same application.

The parameter process to provide parameters(like udid.) for distributed components.

Compile and build tools that based on GN and ninja for distributed middleware components.

KV store is developed based on the KV storage capacity provided by the current public infrastructure library, providing key value pair data management capabilities for device applications.

Distributed Data Service (DDS) provides the capability to store data in the databases of different devices. DDS isolates data based on a triplet of the account, app, and database. DDS synchronizes data between trusted devices to provide users with consi...

Hilog module logs information such as user operations and system running status for the system framework, services, and applications

HiSysEvent provides event logging APIs for OpenHarmony to record important information of key processes during system running, helping you locate faults. In addition, you can upload the log data to the cloud for big data analytics.

EventHandler provides the basic ability for OpenHarmony thread to thread communication, allowing for the creation of new threads through EventRunner and the throwing of time-consuming operations onto the new thread for execution, thereby achieving reaso...

OpenHarmony provides applications with the ability to subscribe, publish, and unsubscribe from public events through CES (Common Event Service).

Libcoap is a C implementation of the Constrained Application Protocol (RFC 7252)

The commonlibrary/c_utils repository provides the commonly used C++ utility classes for standard system.

The configuration policy component, namely, customization_config_policy, provides APIs for each service module to obtain the configuration directories at different levels or the configuration file paths.

The inter-process communication (IPC) and remote procedure call (RPC) mechanisms are used to implement cross-process communication.