ScheduledEventBuilder.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
 
#pragma once
 
#include <memory>
#include <functional>
 
#include "celix/ScheduledEvent.h"
#include "celix/Exception.h"
 
namespace celix {
 
class ScheduledEventBuilder final {
public:
    ScheduledEventBuilder(std::shared_ptr<celix_bundle_context_t> _cCtx) : ctx{std::move(_cCtx)}, options{} {}
 
    template<typename Rep, typename Period>
    ScheduledEventBuilder& withInitialDelay(std::chrono::duration<Rep, Period> delay) {
        options.initialDelayInSeconds = std::chrono::duration_cast<std::chrono::duration<double>>(delay).count();
        return *this;
    }
 
    template<typename Rep, typename Period>
    ScheduledEventBuilder& withInterval(std::chrono::duration<Rep, Period> interval) {
        options.intervalInSeconds = std::chrono::duration_cast<std::chrono::duration<double>>(interval).count();
        return *this;
    }
 
    ScheduledEventBuilder& withName(std::string n) {
        name = std::move(n);
        return *this;
    }
 
    ScheduledEventBuilder& withCallback(std::function<void()> cb) {
        callback = std::move(cb);
        return *this;
    }
 
    ScheduledEventBuilder& withRemoveCallback(std::function<void()> cb) {
        removeCallback = std::move(cb);
        return *this;
    }
 
    ScheduledEvent build() {
        if (!callback) {
            throw celix::Exception{"Cannot build scheduled event without callback"}; //TODO improve error
        }
        return ScheduledEvent{ctx, name, std::move(callback), std::move(removeCallback), options};
    }
 
private:
    std::shared_ptr<celix_bundle_context_t> ctx; 
    celix_scheduled_event_options_t options; 
    std::string name{}; 
    std::function<void()> callback{}; 
    std::function<void()> removeCallback{}; 
};
 
} // end namespace celix