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/*******************************************************************************
 * Copyright 2016-2017 ZTE, Inc. and others.
 * 
 * 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 org.onap.msb.apiroute.wrapper.consulextend;

import org.apache.http.HttpHost;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.annotations.VisibleForTesting;

public class Consul {
    /**
     * Default Consul HTTP API host.
     */
    public static final String DEFAULT_HTTP_HOST = "localhost";

    /**
     * Default Consul HTTP API port.
     */
    public static final int DEFAULT_HTTP_PORT = 8500;

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

    private final CatalogClient catalogClient;
    private final HealthClient healthClient;

    private Consul(CatalogClient catalogClient, HealthClient healthClient) {
        this.catalogClient = catalogClient;
        this.healthClient = healthClient;
    }

    /**
     * Get the Catalog HTTP client.
     * <p>
     * /v1/catalog
     * 
     * @return The Catalog HTTP client.
     */
    public CatalogClient catalogClient() {
        return catalogClient;
    }

    /**
     * Get the Health HTTP client.
     * <p>
     * /v1/health
     * 
     * @return The Health HTTP client.
     */
    public HealthClient healthClient() {
        return healthClient;
    }

    /**
     * Creates a new {@link Builder} object.
     * 
     * @return A new Consul builder.
     */
    public static Builder builder() {
        return new Builder();
    }

    /**
     * Used to create a default Consul client.
     * 
     * @return A default {@link Consul} client.
     */
    @VisibleForTesting
    public static Consul newClient() {
        return builder().build();
    }

    public static class Builder {

        private HttpHost targetHost;

        {
            targetHost = new HttpHost(DEFAULT_HTTP_HOST, DEFAULT_HTTP_PORT);
        }

        Builder() {

        }

        public Builder withHostAndPort(String hostname, int port) {
            this.targetHost = new HttpHost(hostname, port);
            return this;
        }

        public Consul build() {
            LOGGER.info("********build consul:" + targetHost.toString() + "****************");
            CatalogClient catalogClient = new CatalogClient(targetHost);
            HealthClient healthClient = new HealthClient(targetHost);
            return new Consul(catalogClient, healthClient);
        }

    }
}