service-maker/includes/signal_emitter.hpp

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/*
 * SPDX-FileCopyrightText: Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef NVIDIA_DEEPSTREAM_SIGNAL_EMITTER
#define NVIDIA_DEEPSTREAM_SIGNAL_EMITTER
 
#include <memory>
#include "custom_object.hpp"
 
namespace deepstream {
 
class Element;
 
class SignalEmitter : public CustomObject {
public:
  class IActionOwner {
   public:
    virtual ~IActionOwner() {}
 
    virtual std::vector<std::string> list() = 0;
 
    virtual void onAttached(SignalEmitter* emitter, const std::string& action, const std::string& object) = 0;
  };
 
  SignalEmitter(const std::string& name, IActionOwner* owner);
 
  SignalEmitter(const std::string& name, const char* factory, IActionOwner* owner);
 
  virtual ~SignalEmitter();
 
  static unsigned long type();
 
  SignalEmitter& attach(const std::string& action_name, Object& object);
  SignalEmitter& emit(const std::string& action_name, const std::string& object_name, ...);
 
protected:
  std::multimap<std::string, Object> object_map_;
  std::unique_ptr<IActionOwner> owner_;
};
 
}
 
 
#endif