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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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.
 */
package io.gravitee.gateway.services.impl;

import io.gravitee.common.service.AbstractService;
import io.gravitee.gateway.services.ServiceManager;
import io.gravitee.gateway.services.http.HttpServer;
import io.gravitee.gateway.services.http.configuration.HttpServerConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.ArrayList;
import java.util.List;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class ServiceManagerImpl extends AbstractService implements ServiceManager {

    private static final Logger LOGGER = LoggerFactory.getLogger(ServiceManagerImpl.class);

    private final List services = new ArrayList<>();

    @Autowired
    private HttpServerConfiguration serverConfiguration;

    @Autowired
    private HttpServer httpServer;

    @Override
    public void register(AbstractService service) {
        services.add(service);
    }

    @Override
    protected void doStart() throws Exception {
        super.doStart();

        if (serverConfiguration.isEnabled()) {
            httpServer.start();
        }

        for (AbstractService service : services) {
            try {
                service.start();
            } catch (Exception ex) {
                LOGGER.error("Unexpected error while starting service", ex);
            }
        }
    }

    @Override
    protected void doStop() throws Exception {
        super.doStop();

        for(AbstractService service: services) {
            try {
                service.stop();
            } catch (Exception ex) {
                LOGGER.error("Unexpected error while stopping service", ex);
            }
        }

        if (serverConfiguration.isEnabled()) {
            try {
                httpServer.stop();
            } catch (Exception ex) {
                LOGGER.error("Unexpected error while stopping HTTP server for gateway API", ex);
            }
        }
    }

    @Override
    protected String name() {
        return "Gateway Services Manager";
    }
}