content: /*
   * Copyright (c) 2010, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.jdbc;
  
  import java.sql.SQLException;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import com.mysql.cj.jdbc.jmx.LoadBalanceConnectionGroupManager;
  
  public class ConnectionGroupManager {
  
      private static HashMap<String, ConnectionGroup> GROUP_MAP = new HashMap<>();
  
      private static LoadBalanceConnectionGroupManager mbean = new LoadBalanceConnectionGroupManager();
  
      private static boolean hasRegisteredJmx = false;
  
      public static synchronized ConnectionGroup getConnectionGroupInstance(String groupName) {
          if (GROUP_MAP.containsKey(groupName)) {
              return GROUP_MAP.get(groupName);
          }
          ConnectionGroup group = new ConnectionGroup(groupName);
          GROUP_MAP.put(groupName, group);
          return group;
      }
  
      public static void registerJmx() throws SQLException {
          if (hasRegisteredJmx) {
              return;
          }
  
          mbean.registerJmx();
          hasRegisteredJmx = true;
      }
  
      public static ConnectionGroup getConnectionGroup(String groupName) {
          return GROUP_MAP.get(groupName);
      }
  
      private static Collection<ConnectionGroup> getGroupsMatching(String group) {
          if (group == null || group.equals("")) {
              Set<ConnectionGroup> s = new HashSet<>();
  
              s.addAll(GROUP_MAP.values());
              return s;
          }
          Set<ConnectionGroup> s = new HashSet<>();
          ConnectionGroup o = GROUP_MAP.get(group);
          if (o != null) {
              s.add(o);
          }
          return s;
  
      }
  
      public static void addHost(String group, String hostPortPair, boolean forExisting) {
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              cg.addHost(hostPortPair, forExisting);
          }
      }
  
      public static int getActiveHostCount(String group) {
  
          Set<String> active = new HashSet<>();
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              active.addAll(cg.getInitialHosts());
          }
          return active.size();
      }
  
      public static long getActiveLogicalConnectionCount(String group) {
          int count = 0;
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              count += cg.getActiveLogicalConnectionCount();
          }
          return count;
      }
  
      public static long getActivePhysicalConnectionCount(String group) {
          int count = 0;
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              count += cg.getActivePhysicalConnectionCount();
          }
          return count;
      }
  
      public static int getTotalHostCount(String group) {
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          Set<String> hosts = new HashSet<>();
          for (ConnectionGroup cg : s) {
              hosts.addAll(cg.getInitialHosts());
              hosts.addAll(cg.getClosedHosts());
          }
          return hosts.size();
      }
  
      public static long getTotalLogicalConnectionCount(String group) {
          long count = 0;
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              count += cg.getTotalLogicalConnectionCount();
          }
          return count;
      }
  
      public static long getTotalPhysicalConnectionCount(String group) {
          long count = 0;
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              count += cg.getTotalPhysicalConnectionCount();
          }
          return count;
      }
  
      public static long getTotalTransactionCount(String group) {
          long count = 0;
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              count += cg.getTotalTransactionCount();
          }
          return count;
      }
  
      public static void removeHost(String group, String hostPortPair) throws SQLException {
          removeHost(group, hostPortPair, false);
      }
  
      public static void removeHost(String group, String host, boolean removeExisting) throws SQLException {
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          for (ConnectionGroup cg : s) {
              cg.removeHost(host, removeExisting);
          }
      }
  
      public static String getActiveHostLists(String group) {
          Collection<ConnectionGroup> s = getGroupsMatching(group);
          Map<String, Integer> hosts = new HashMap<>();
          for (ConnectionGroup cg : s) {
  
              Collection<String> l = cg.getInitialHosts();
              for (String host : l) {
                  Integer o = hosts.get(host);
                  if (o == null) {
                      o = Integer.valueOf(1);
                  } else {
                      o = Integer.valueOf(o.intValue() + 1);
                  }
                  hosts.put(host, o);
  
              }
          }
  
          StringBuilder sb = new StringBuilder();
          String sep = "";
          for (String host : hosts.keySet()) {
              sb.append(sep);
              sb.append(host);
              sb.append('(');
              sb.append(hosts.get(host));
              sb.append(')');
              sep = ",";
          }
          return sb.toString();
      }
  
      public static String getRegisteredConnectionGroups() {
          Collection<ConnectionGroup> s = getGroupsMatching(null);
          StringBuilder sb = new StringBuilder();
          String sep = "";
          for (ConnectionGroup cg : s) {
              String group = cg.getGroupName();
              sb.append(sep);
              sb.append(group);
              sep = ",";
          }
          return sb.toString();
  
      }
  
  }
  