Component Manager

Component manager provides information about installed and running components.

The main features of Component Manager API include:

Managing component context

You can retrieve the running component context and operate on it. The component_context_h handle of Component Context API (in mobile and wearable applications) is related to the running components and can be used to manage the component context.
Managing component information

The component_info_h handle of Component Information API (in mobile and wearable applications) is related to the available components that are installed but not necessarily running.

Iterator functions are used to travel through a list of components. component_manager_foreach_component_context() is used in running components and component_manager_foreach_component_info() is used in available components. Each function calls a callback function component_manager_component_context_cb() or component_manager_component_info_cb(), passing the handle for each component.

Prerequisites

To enable your application to use the component management functionality:

To use Component Manager API (in mobile and wearable applications), the application has to request permission by adding the following privileges to the tizen-manifest.xml file:

<privileges>
  <privilege>http://tizen.org/privilege/appmanager.launch</privilege>
  <privilege>http://tizen.org/privilege/packagemanager.info</privilege>
</privileges>

To use the functions and data types of Component Manager API, include the <component_manager.h> header file in your application:
```
#include <component_manager.h>
```

Managing Component Context

To get the running component context and its details, and to operate on the context:

Get the context of the currently running component with component_manager_get_component_context(). Use the obtained component ID and component_context_h handle of the component with received context as the parameter.

To get a component’s context, the component must be running.
```
component_context_h component_context = NULL;
int ret = component_manager_get_component_context(`Your Component ID`, &component_context);
```
If it is executed correctly, the function returns COMPONENT_MANAGER_ERROR_NONE and component_context variable contains the handle to the defined component context.

Operate on the context:

Get the component ID from the context:

char *component_id;
ret = component_context_get_component_id(component_context, &component_id);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
   dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get component ID. error(%d)", ret);
   return;
}

When component_id is no longer needed, release it using free().

Get the application ID from the context:

char *app_id;
ret = component_context_get_app_id(component_context, &app_id);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get application ID. error(%d)", ret);
    return;
}

When app_id is no longer needed, release it using free().

Check whether the component with the given component context is terminated:

bool terminated = false;

ret = component_context_is_terminated(component_context, &terminated);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to check whether the component is terminated or not. error(%d)", ret);
    return;
}

if (terminated == true)
    dlog_print(DLOG_INFO, LOG_TAG, "The component is terminated");
else
    dlog_print(DLOG_INFO, LOG_TAG, "The component is not terminated");

Clone the given context handle:

component_context_h component_context_cloned = NULL;

ret = component_context_clone(&component_context_cloned, component_context);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to clone component context. error(%d)", ret);
    return;
}

Get the state of the component:

component_state_e state;

ret = component_context_get_component_state(component_context, &state);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get component state. error(%d)", ret);
    return;
}

dlog_print(DLOG_INFO, LOG_TAG, "Component State: %d", state);

Check whether the component is running as a sub component of the group:

bool is_subcomponent = false;
ret = component_context_is_subcomponent(component_context, &is_subcomponent);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to check whether the component is running as sub component of the group. error(%d)", ret);
    return;
}

Resume the running component:

ret = component_manager_resume_component(component_context);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to resume component. error(%d)", ret);
    return;
}

When the component is frame-component, it will appear on the screen.

Terminate the running component in the background:

ret = component_manager_terminate_bg_component(component_context);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to terminate bg component. error(%d)", ret);
    return;
}

When you no longer need the component context, call component_context_destroy() to remove the handle and release all resources to prevent memory leaks:

ret = component_context_destroy(component_context);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to destroy component context. error(%d)", ret);
    return;
}

Managing Component Information

To get the installed information and its details, and to operate on the information:

Get the information of the currently-installed component with component_manager_get_component_info(). Use the obtained component ID and component_info_h handle of the component with received information as the parameter.

To get a component’s information, the component must be installed.
```
component_info_h component_info = NULL;
int ret = component_manager_get_component_info(`Your Component ID`, &component_info);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get component info. error(%d)", ret);
    return;
}
```

Operate on the information:

Get the component ID from the handle:

char *component_id;
ret = component_info_get_component_id(component_info, &component_id);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get component ID. error(%d)", ret);
    return;
}

When component_id is no longer needed, release it using free().

Get the application ID from the handle:

char *app_id;
ret = component_info_get_app_id(component_info, &app_id);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get application ID. error(%d)", ret);
    return;
}

When app_id is no longer needed, release it using free().

Get the component type from the handle:

component_info_component_type_e type;
ret = component_info_get_component_type(component_info, &type);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Falied to get component type. error(%d)", ret);
    return;
}

if (type == COMPONENT_INFO_COMPONENT_TYPE_FRAME)
    dlog_print(DLOG_INFO, LOG_TAG, "Component type: frame");
else if (type == COMPONENT_INFO_COMPONENT_TYPE_SERVICE)
    dlog_print(DLOG_INFO, LOG_TAG, "Component type: service");

Get the icon path and verify whether the icon of the component appears on the home screen or not:

char *icon;
ret = component_info_get_icon(component_info, &icon);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get icon path. error(%d)", ret);
    return;
}

bool icon_display = false;
ret = component_info_is_icon_display(component_info, &icon_display);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to check whether the icon is displayed or not. error(%d)", ret);
    return;
}

dlog_print(DLOG_INFO, LOG_TAG, "Icon path: %s", icon);
dlog_print(DLOG_INFO, LOG_TAG, "Icon is displayed on the home screen: %s", icon_display ? "true" : "false");

When icon is no longer needed, release it using free().

Check whether the component should be managed by task-manager or not:

bool managed = false;
ret = component_info_is_managed_by_task_manager(component_info, &managed);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to check the component is managed by task-manager. error(%d)", ret);
    return;
}

dlog_print(DLOG_INFO, LOG_TAG, "Component is managed by task manager: %s", managed ? "true" : "false");

Get the label of the component from the handle:

char *label;
ret = component_info_get_label(component_info, &label);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get component label. error(%d)", ret);
    return;
}

dlog_print(DLOG_INFO, LOG_TAG, "Component Name: %s", label);

When label is no longer needed, release it using free().

Get the localized label with ‘en-us’ locale from the handle.

char *localized_label;
ret = component_info_get_localized_label(component_info, 'en-us', &localized_label);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to get localized label. error(%d)", ret);
    return;
}

dlog_print(DLOG_INFO, LOG_TAG, "Component Name: %s", localized_label);

When localized_label is no longer needed, release it using free().

When you no longer need the component information, call component_info_destroy() to remove the handle and release all resources to prevent memory leaks:

ret = component_info_destroy(component_info);
if (ret != COMPONENT_MANAGER_ERROR_NONE) {
    dlog_print(DLOG_ERROR, LOG_TAG, "Failed to destroy component info. error(%d)", ret);
    return;
}

Dependencies
- Tizen 5.5 and Higher for Mobile
- Tizen 5.5 and Higher for Wearable

Component Manager

Prerequisites

Managing Component Context

Managing Component Information

Related Information