| // Copyright 2023 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_PERFORMANCE_EXPERIMENTAL_PROFILER_COMPONENT_WATCHER_H_ |
| #define SRC_PERFORMANCE_EXPERIMENTAL_PROFILER_COMPONENT_WATCHER_H_ |
| |
| #include <fidl/fuchsia.component/cpp/fidl.h> |
| #include <lib/async/dispatcher.h> |
| #include <lib/zx/result.h> |
| |
| namespace profiler { |
| |
| class ComponentWatcher { |
| public: |
| explicit ComponentWatcher(async_dispatcher_t* dispatcher) : dispatcher_(dispatcher) {} |
| |
| zx::result<> Watch(); |
| zx::result<> Reset(); |
| void HandleEvent(fidl::Result<fuchsia_component::EventStream::GetNext>& res); |
| |
| using ComponentEventHandler = fit::function<void(std::string moniker, std::string url)>; |
| |
| // Run a handler when we receive a start/stop event for a moniker |
| zx::result<> WatchForMoniker(std::string moniker, ComponentEventHandler handler); |
| |
| // Run a handler when we receive a start/stop event for a url. |
| // |
| // This is less precise than watching for a moniker since multiple components may share a url, but |
| // is used for when we don't handle launching the component directly and don't know the moniker, |
| // such as with tests. |
| zx::result<> WatchForUrl(std::string url, ComponentEventHandler handler); |
| |
| private: |
| fidl::Client<fuchsia_component::EventStream> stream_client_; |
| async_dispatcher_t* dispatcher_; |
| |
| std::map<std::string, ComponentEventHandler> moniker_watchers_; |
| std::map<std::string, ComponentEventHandler> url_watchers_; |
| }; |
| } // namespace profiler |
| |
| #endif // SRC_PERFORMANCE_EXPERIMENTAL_PROFILER_COMPONENT_WATCHER_H_ |