bundles/cxx_remote_services/integration/src/CalculatorProvider.cc

/*
 * 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.
 */

#include <memory>

#include "celix/BundleActivator.h"
#include "celix/PromiseFactory.h"
#include "ICalculator.h"

class CalculatorImpl final : public ICalculator {
public:
    ~CalculatorImpl() noexcept override = default;

    celix::Promise<double> add(double a, double b) override {
        auto deferred = factory->deferred<double>();
        deferred.resolve(a+b);
        return deferred.getPromise();
    }

    void setFactory(const std::shared_ptr<celix::PromiseFactory>& fac) {
        factory = fac;
    }
private:
    std::shared_ptr<celix::PromiseFactory> factory{};
};

class CalculatorProviderActivator {
public:
    explicit CalculatorProviderActivator(const std::shared_ptr<celix::BundleContext>& ctx) {
        auto& cmp = ctx->getDependencyManager()->createComponent(std::make_shared<CalculatorImpl>());
        cmp.createServiceDependency<celix::PromiseFactory>()
                .setRequired(true)
                .setCallbacks(&CalculatorImpl::setFactory);
        cmp.createProvidedService<ICalculator>()
                .addProperty("service.exported.interfaces", celix::typeName<ICalculator>())
                .addProperty("endpoint.topic", "test")
                .addProperty("endpoint.scope", "default");
        cmp.build();
    }
};

CELIX_GEN_CXX_BUNDLE_ACTIVATOR(CalculatorProviderActivator)