xapian-core/net/replicatetcpclient.cc

   1 /** @file
   2  *  @brief TCP/IP replication client class.
   3  */
   4 /* Copyright (C) 2008,2010,2011,2015 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <config.h>
  22
  23 #include "replicatetcpclient.h"
  24
  25 #include "api/replication.h"
  26
  27 #include "socket_utils.h"
  28 #include "tcpclient.h"
  29
  30 using namespace std;
  31
  32 ReplicateTcpClient::ReplicateTcpClient(const string & hostname, int port,
  33                                        double timeout_connect,
  34                                        double socket_timeout)
  35     : socket(open_socket(hostname, port, timeout_connect)),
  36       remconn(-1, socket)
  37 {
  38     set_socket_timeouts(socket, socket_timeout);
  39 }
  40
  41 int
  42 ReplicateTcpClient::open_socket(const string & hostname, int port,
  43                                 double timeout_connect)
  44 {
  45     return TcpClient::open_socket(hostname, port, timeout_connect, false);
  46 }
  47
  48 void
  49 ReplicateTcpClient::update_from_master(const std::string & path,
  50                                        const std::string & masterdb,
  51                                        Xapian::ReplicationInfo & info,
  52                                        double reader_close_time,
  53                                        bool force_copy)
  54 {
  55     Xapian::DatabaseReplica replica(path);
  56     remconn.send_message('R',
  57                          force_copy ? string() : replica.get_revision_info(),
  58                          0.0);
  59     remconn.send_message('D', masterdb, 0.0);
  60     replica.set_read_fd(socket);
  61     info.clear();
  62     bool more;
  63     do {
  64         Xapian::ReplicationInfo subinfo;
  65         more = replica.apply_next_changeset(&subinfo, reader_close_time);
  66         info.changeset_count += subinfo.changeset_count;
  67         info.fullcopy_count += subinfo.fullcopy_count;
  68         if (subinfo.changed)
  69             info.changed = true;
  70     } while (more);
  71 }
  72
  73 ReplicateTcpClient::~ReplicateTcpClient()
  74 {
  75     remconn.shutdown();
  76 }