content: /**
   * Copyright (c) 2018-2019, Mihai Emil Andronache
   * All rights reserved.
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 1)Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   * 2)Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   * 3)Neither the name of docker-java-api nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  package com.amihaiemil.docker;
  
  import java.io.IOException;
  import java.net.URI;
  import javax.json.Json;
  import javax.json.JsonObject;
  import org.apache.http.HttpStatus;
  import org.apache.http.client.HttpClient;
  import org.apache.http.client.methods.HttpPost;
  import org.apache.http.entity.ContentType;
  import org.apache.http.entity.StringEntity;
  
  /**
   * Swarm API.
   * @author George Aristy (george.aristy@gmail.com)
   * @version $Id: b73f63dc4fcc68fcc440c1e8dab0526589223ddd $
   * @since 0.0.1
   */
  final class RtSwarm implements Swarm {
      /**
       * Apache HttpClient which sends the requests.
       */
      private final HttpClient client;
  
      /**
       * Base URI.
       */
      private final URI baseUri;
  
      /**
       * Docker engine.
       */
      private Docker docker;
      
      /**
       * Ctor.
       * @param client Given HTTP Client.
       * @param baseUri Base URI, ending with /swarm.
       * @param dkr The Docker engine.
       */
      RtSwarm(final HttpClient client, final URI baseUri, final Docker dkr) {
          this.client = client;
          this.baseUri = baseUri;
          this.docker = dkr;
      }
  
      @Override
      public JsonObject inspect() throws IOException {
          return new Inspection(this.client, this.baseUri.toString());
      }
  
      @Override
      public String init(final String listenAddress) throws IOException {
          return this.init(
              Json.createObjectBuilder()
                  .add("ListenAddr", listenAddress)
                  .add("ForceNewCluster", false)
                  .build()
          );
      }
  
      @Override
      public String init(final JsonObject spec) throws IOException {
          final HttpPost init = new HttpPost(this.baseUri.toString() + "/init");
          try {
              init.setEntity(
                  new StringEntity(
                      spec.toString(), ContentType.APPLICATION_JSON
                  )
              );
              return this.client.execute(
                  init,
                  new ReadString(
                      new MatchStatus(
                          init.getURI(),
                          HttpStatus.SC_OK
                      )
                  )
              );
          } finally {
              init.releaseConnection();
          }
      }
  
      @Override
      public void leave(final boolean force) throws IOException {
          final HttpPost leave = new HttpPost(
              this.baseUri.toString() + "/leave?force=" + String.valueOf(force)
          );
          try {
              this.client.execute(
                  leave,
                  new MatchStatus(leave.getURI(), HttpStatus.SC_OK)
              );
          } finally {
              leave.releaseConnection();
          }
      }
      
      @Override
      public Docker docker() {
          return this.docker;
      }
  }
  