content: /*
   * Copyright (c) 2013, 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.ha;
  
  import java.sql.SQLException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Set;
  
  public class ReplicationConnectionGroupManager {
      private static HashMap<String, ReplicationConnectionGroup> GROUP_MAP = new HashMap<>();
  
      private static com.mysql.cj.jdbc.jmx.ReplicationGroupManager mbean = new com.mysql.cj.jdbc.jmx.ReplicationGroupManager();
  
      private static boolean hasRegisteredJmx = false;
  
      public static synchronized ReplicationConnectionGroup getConnectionGroupInstance(String groupName) {
          if (GROUP_MAP.containsKey(groupName)) {
              return GROUP_MAP.get(groupName);
          }
          ReplicationConnectionGroup group = new ReplicationConnectionGroup(groupName);
          GROUP_MAP.put(groupName, group);
          return group;
      }
  
      public static void registerJmx() throws SQLException {
          if (hasRegisteredJmx) {
              return;
          }
  
          mbean.registerJmx();
          hasRegisteredJmx = true;
      }
  
      public static ReplicationConnectionGroup getConnectionGroup(String groupName) {
          return GROUP_MAP.get(groupName);
      }
  
      public static Collection<ReplicationConnectionGroup> getGroupsMatching(String group) {
          if (group == null || group.equals("")) {
              Set<ReplicationConnectionGroup> s = new HashSet<>();
  
              s.addAll(GROUP_MAP.values());
              return s;
          }
          Set<ReplicationConnectionGroup> s = new HashSet<>();
          ReplicationConnectionGroup o = GROUP_MAP.get(group);
          if (o != null) {
              s.add(o);
          }
          return s;
      }
  
      public static void addReplicaHost(String group, String hostPortPair) throws SQLException {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              cg.addReplicaHost(hostPortPair);
          }
      }
  
      /**
       * Use {@link #addReplicaHost(String, String)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void addSlaveHost(String group, String hostPortPair) throws SQLException {
          addReplicaHost(group, hostPortPair);
      }
  
      public static void removeReplicaHost(String group, String hostPortPair) throws SQLException {
          removeReplicaHost(group, hostPortPair, true);
      }
  
      /**
       * Use {@link #removeReplicaHost(String, String)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void removeSlaveHost(String group, String hostPortPair) throws SQLException {
          removeReplicaHost(group, hostPortPair);
      }
  
      public static void removeReplicaHost(String group, String hostPortPair, boolean closeGently) throws SQLException {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              cg.removeReplicaHost(hostPortPair, closeGently);
          }
      }
  
      /**
       * Use {@link #removeReplicaHost(String, String, boolean)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @param closeGently
       *            option
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void removeSlaveHost(String group, String hostPortPair, boolean closeGently) throws SQLException {
          removeReplicaHost(group, hostPortPair, closeGently);
      }
  
      public static void promoteReplicaToSource(String group, String hostPortPair) throws SQLException {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              cg.promoteReplicaToSource(hostPortPair);
          }
      }
  
      /**
       * Use {@link #promoteReplicaToSource(String, String)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void promoteSlaveToMaster(String group, String hostPortPair) throws SQLException {
          promoteReplicaToSource(group, hostPortPair);
      }
  
      public static long getReplicaPromotionCount(String group) throws SQLException {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          long promoted = 0;
          for (ReplicationConnectionGroup cg : s) {
              long tmp = cg.getNumberOfReplicaPromotions();
              if (tmp > promoted) {
                  promoted = tmp;
              }
          }
          return promoted;
      }
  
      /**
       * Use {@link #getReplicaPromotionCount(String)} instead.
       * 
       * @param group
       *            group name
       * @return count
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static long getSlavePromotionCount(String group) throws SQLException {
          return getReplicaPromotionCount(group);
      }
  
      public static void removeSourceHost(String group, String hostPortPair) throws SQLException {
          removeSourceHost(group, hostPortPair, true);
      }
  
      /**
       * Use {@link #removeSourceHost(String, String)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void removeMasterHost(String group, String hostPortPair) throws SQLException {
          removeSourceHost(group, hostPortPair);
      }
  
      public static void removeSourceHost(String group, String hostPortPair, boolean closeGently) throws SQLException {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              cg.removeSourceHost(hostPortPair, closeGently);
          }
      }
  
      /**
       * Use {@link #removeSourceHost(String, String, boolean)} instead.
       * 
       * @param group
       *            group name
       * @param hostPortPair
       *            host:port
       * @param closeGently
       *            option
       * @throws SQLException
       * @deprecated
       */
      @Deprecated
      public static void removeMasterHost(String group, String hostPortPair, boolean closeGently) throws SQLException {
          removeSourceHost(group, hostPortPair, closeGently);
      }
  
      public static String getRegisteredReplicationConnectionGroups() {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(null);
          StringBuilder sb = new StringBuilder();
          String sep = "";
          for (ReplicationConnectionGroup cg : s) {
              String group = cg.getGroupName();
              sb.append(sep);
              sb.append(group);
              sep = ",";
          }
          return sb.toString();
      }
  
      public static int getNumberOfSourcePromotion(String groupFilter) {
          int total = 0;
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(groupFilter);
          for (ReplicationConnectionGroup cg : s) {
              total += cg.getNumberOfReplicaPromotions();
          }
          return total;
      }
  
      /**
       * Use {@link #getNumberOfSourcePromotion(String)} instead.
       * 
       * @param groupFilter
       *            filter
       * @return count
       * @deprecated
       */
      @Deprecated
      public static int getNumberOfMasterPromotion(String groupFilter) {
          return getNumberOfSourcePromotion(groupFilter);
      }
  
      public static int getConnectionCountWithHostAsReplica(String groupFilter, String hostPortPair) {
          int total = 0;
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(groupFilter);
          for (ReplicationConnectionGroup cg : s) {
              total += cg.getConnectionCountWithHostAsReplica(hostPortPair);
          }
          return total;
      }
  
      /**
       * Use {@link #getConnectionCountWithHostAsReplica(String, String)} instead.
       * 
       * @param groupFilter
       *            filter
       * @param hostPortPair
       *            host:port
       * @return count
       * @deprecated
       */
      @Deprecated
      public static int getConnectionCountWithHostAsSlave(String groupFilter, String hostPortPair) {
          return getConnectionCountWithHostAsReplica(groupFilter, hostPortPair);
      }
  
      public static int getConnectionCountWithHostAsSource(String groupFilter, String hostPortPair) {
          int total = 0;
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(groupFilter);
          for (ReplicationConnectionGroup cg : s) {
              total += cg.getConnectionCountWithHostAsSource(hostPortPair);
          }
          return total;
      }
  
      /**
       * Use {@link #getConnectionCountWithHostAsSource(String, String)} instead.
       * 
       * @param groupFilter
       *            filter
       * @param hostPortPair
       *            host:port
       * @return count
       * @deprecated
       */
      @Deprecated
      public static int getConnectionCountWithHostAsMaster(String groupFilter, String hostPortPair) {
          return getConnectionCountWithHostAsSource(groupFilter, hostPortPair);
      }
  
      public static Collection<String> getReplicaHosts(String groupFilter) {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(groupFilter);
          Collection<String> hosts = new ArrayList<>();
          for (ReplicationConnectionGroup cg : s) {
              hosts.addAll(cg.getReplicaHosts());
          }
          return hosts;
      }
  
      /**
       * Use {@link #getReplicaHosts(String)} instead.
       * 
       * @param groupFilter
       *            filter
       * @return hosts
       * @deprecated
       */
      @Deprecated
      public static Collection<String> getSlaveHosts(String groupFilter) {
          return getReplicaHosts(groupFilter);
      }
  
      public static Collection<String> getSourceHosts(String groupFilter) {
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(groupFilter);
          Collection<String> hosts = new ArrayList<>();
          for (ReplicationConnectionGroup cg : s) {
              hosts.addAll(cg.getSourceHosts());
          }
          return hosts;
      }
  
      /**
       * Use {@link #getSourceHosts(String)} instead.
       * 
       * @param groupFilter
       *            filter
       * @return hosts
       * @deprecated
       */
      @Deprecated
      public static Collection<String> getMasterHosts(String groupFilter) {
          return getSourceHosts(groupFilter);
      }
  
      public static long getTotalConnectionCount(String group) {
          long connections = 0;
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              connections += cg.getTotalConnectionCount();
          }
          return connections;
      }
  
      public static long getActiveConnectionCount(String group) {
          long connections = 0;
          Collection<ReplicationConnectionGroup> s = getGroupsMatching(group);
          for (ReplicationConnectionGroup cg : s) {
              connections += cg.getActiveConnectionCount();
          }
          return connections;
      }
  }
  