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https://issues.apache.org/jira/browse/CELIX-441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pepijn Noltes updated CELIX-441:
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Attachment: bundle_context_additions.h
> Add service tracker api to bundle context
> -----------------------------------------
>
> Key: CELIX-441
> URL: https://issues.apache.org/jira/browse/CELIX-441
> Project: Celix
> Issue Type: Improvement
> Components: Framework
> Affects Versions: 2.3.0
> Reporter: Pepijn Noltes
> Priority: Major
> Attachments: bundle_context_additions.h
>
>
> To make the use of service trackers easier integrate a service tracker API
> directly on the bundle context.
> The service tracker should be stored in the bundle context and automatically
> be closed and destroy when the bundle is respectively stopped / destroyed.
> Proposed API:
> /**
> * track service for the provided serviceName and/or filter.
> * The highest ranking services will used for the callback.
> * If a new and higher ranking services the callback with be called again
> with the new service.
> * If a service is removed a the callback with be called with next highest
> ranking service or NULL as service.
> *
> * @param ctx The bundle context.
> * @param serviceName Optional the service name to track
> * @param serviceVersionRange Optional the service version range to track
> * @param filter Optional the LDAP filter to use
> * @param data The data pointer, which will be used in the callbacks
> * @param setting The callback, which will be called when a new highest
> ranking service is set.
> * @return the tracker uuid or null uuid (uuid_is_null) if unsuccessful.
> */
> uuid_t bundleContext_trackService(
> bundle_context_t* mod,
> const char* serviceName,
> const char* serviceVersionRange,
> const char* filter,
> void* data,
> int (*setting)(void* data, void* svc)
> );
> /**
> * track services for the provided serviceName and/or filter.
> *
> * @param ctx The bundle context.
> * @param serviceName Optional the service name to track
> * @param serviceVersionRange Optional the service version range to track
> * @param filter Optional the LDAP filter to use
> * @param data The data pointer, which will be used in the callbacks
> * @param adding The callback, which will be called when service is added.
> * @param removing The callback, which will be called when a service is
> removed
> * @return the tracker uuid or null uuid (uuid_is_null) if unsuccessful.
> */
> uuid_t bundleContext_trackServices(
> bundle_context_t* ctx,
> const char* serviceName,
> const char* serviceVersionRange,
> const char* filter,
> void* data,
> int (*adding)(void* data, void* svc),
> int (*removing)(void* data, void* svc)
> );
> typedef struct celix_service_tracker_options {
> //service filter options
> const char* serviceName;
> const char* serviceVersionRange;
> const char* filter;
> const char* lang; //NULL -> 'CELIX_LANG_C'
> //callback options
> void* callbackHandle;
> int (*onSettingFp)(void *handle, void *svc); //highest ranking
> int (*onAddingFp)(void *handle, void *svc);
> int (*onRemovingFp)(void *handle, void *svc);
> int (*onSettingWithProperties)(void *handle, properties_t *props, void
> *svc); //highest ranking
> int (*onAddingWithProperties)(void *handle, properties_t *props, void
> *svc);
> int (*onRemovingWithProperties)(void *handle, properties_t *props, void
> *svc);
> int (*onSettingWithOwner)(void *handle, bundle_t *owner, properties_t
> *props, void *svc); //highest ranking
> int (*onAddingWithOwner)(void *handle, bundle_t *owner, properties_t
> *props, void *svc);
> int (*onRemovingWithOwner)(void *handle, bundle_t *owner, properties_t
> *props, void *svc);
> } celix_service_tracker_options;
> /**
> * Tracks services using the provided tracker options.
> * The tracker options are only using during this call and can safely be
> freed/reused after this call returns.
> *
> * @param ctx The module context.
> * @param opts The pointer to the tracker options.
> * @return the tracker uuid or null uuid (uuid_is_null) if unsuccessful.
> */
> uint64_t bundleContext_trackServicesWithOptions(bundle_context_t *ctx, const
> celix_service_tracker_options *opts);
> //shortcut could be const celix_service_tracker_options opts = {0};
> /**
> * Stop the tracker with the provided track id.
> * Only works for the trackers owned by the bundle of the bundle context.
> *
> * @return CELIX_SUCCESS if the tracker is stopped correctly.
> */
> int bundleContext_stopTracking(bundle_context_t *ctx, uuid_t trackerId);
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