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/*-
 * ============LICENSE_START======================================================================
 * Copyright (C) 2019-2020 China Mobile.  All rights reserved.
 * ===============================================================================================
 * 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.
 * ============LICENSE_END========================================================================
 */

package org.onap.dcae.analytics.web.config;

import java.util.Optional;

import org.onap.dcae.analytics.model.configbindingservice.ConfigBindingServiceConstants;
import org.onap.dcae.analytics.web.exception.EnvironmentLoaderException;

/**
 * 
 * get consul config and cbs config.
 *
 * @author Kai Lu
 */
public class SystemConfig {

    /**
     * 
     * private constructor.
     *
     */
    private SystemConfig() {
    }

    /**
     * getConsulHost.
     *
     * @return consulHost consulHost
     *
     */
    public static String getConsulHost() throws EnvironmentLoaderException {
        return Optional.ofNullable(ConfigBindingServiceConstants.CONSUL_HOST_ENV_VARIABLE_VALUE)
                .orElseThrow(() -> new EnvironmentLoaderException("$CONSUL_HOST environment has not been defined"));
    }

    /**
     * getConsultPort.
     *
     * @return consulPort consulPort
     *
     */
    public static Integer getConsultPort() {
        return ConfigBindingServiceConstants.DEFAULT_CONSUL_PORT_ENV_VARIABLE_VALUE;
    }

    /**
     * getConfigBindingService.
     *
     * @return configBindingService configBindingService
     *
     */
    public static String getConfigBindingService() throws EnvironmentLoaderException {
        return Optional.ofNullable(ConfigBindingServiceConstants.CONFIG_BINDING_SERVICE_ENV_VARIABLE_VALUE) //
                .orElseThrow(() -> new EnvironmentLoaderException(
                        "$CONFIG_BINDING_SERVICE environment has not been defined"));
    }

    /**
     * getService.
     *
     * @return service service
     *
     */
    public static String getService() throws EnvironmentLoaderException {
        return Optional.ofNullable(ConfigBindingServiceConstants.SERVICE_NAME_ENV_VARIABLE_VALUE).orElseThrow(
                () -> new EnvironmentLoaderException("$HOSTNAME have not been defined as system environment"));
    }

}