| 1 | /* |
| 2 | Copyright (C) 2002-2004 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of version 2 of the GNU General Public License as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | |
| 9 | There are special exceptions to the terms and conditions of the GPL |
| 10 | as it is applied to this software. View the full text of the |
| 11 | exception exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
| 12 | software distribution. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | |
| 23 | */ |
| 24 | |
| 25 | package com.mysql.jdbc; |
| 26 | |
| 27 | import java.sql.Connection; |
| 28 | import java.sql.SQLException; |
| 29 | import java.util.Properties; |
| 30 | import java.util.StringTokenizer; |
| 31 | |
| 32 | /** |
| 33 | * Driver that opens two connections, one two a replication master, and another |
| 34 | * to one or more slaves, and decides to use master when the connection is not |
| 35 | * read-only, and use slave(s) when the connection is read-only. |
| 36 | * |
| 37 | * @version $Id: NonRegisteringReplicationDriver.java,v 1.1.2.1 2005/05/13 |
| 38 | * 18:58:37 mmatthews Exp $ |
| 39 | */ |
| 40 | public class NonRegisteringReplicationDriver extends NonRegisteringDriver { |
| 41 | public NonRegisteringReplicationDriver() throws SQLException { |
| 42 | super(); |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * (non-Javadoc) |
| 47 | * |
| 48 | * @see java.sql.Driver#connect(java.lang.String, java.util.Properties) |
| 49 | */ |
| 50 | public Connection connect(String url, Properties info) throws SQLException { |
| 51 | Properties parsedProps = parseURL(url, info); |
| 52 | |
| 53 | if (parsedProps == null) { |
| 54 | return null; |
| 55 | } |
| 56 | |
| 57 | Properties masterProps = (Properties)parsedProps.clone(); |
| 58 | Properties slavesProps = (Properties)parsedProps.clone(); |
| 59 | |
| 60 | // Marker used for further testing later on, also when |
| 61 | // debugging |
| 62 | slavesProps.setProperty("com.mysql.jdbc.ReplicationConnection.isSlave", "true"); |
| 63 | |
| 64 | String hostValues = parsedProps.getProperty(HOST_PROPERTY_KEY); |
| 65 | |
| 66 | if (hostValues != null) { |
| 67 | StringTokenizer st = new StringTokenizer(hostValues, ","); |
| 68 | |
| 69 | StringBuffer masterHost = new StringBuffer(); |
| 70 | StringBuffer slaveHosts = new StringBuffer(); |
| 71 | |
| 72 | if (st.hasMoreTokens()) { |
| 73 | String[] hostPortPair = parseHostPortPair(st.nextToken()); |
| 74 | |
| 75 | if (hostPortPair[HOST_NAME_INDEX] != null) { |
| 76 | masterHost.append(hostPortPair[HOST_NAME_INDEX]); |
| 77 | } |
| 78 | |
| 79 | if (hostPortPair[PORT_NUMBER_INDEX] != null) { |
| 80 | masterHost.append(":"); |
| 81 | masterHost.append(hostPortPair[PORT_NUMBER_INDEX]); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | boolean firstSlaveHost = true; |
| 86 | |
| 87 | while (st.hasMoreTokens()) { |
| 88 | String[] hostPortPair = parseHostPortPair(st.nextToken()); |
| 89 | |
| 90 | if (!firstSlaveHost) { |
| 91 | slaveHosts.append(","); |
| 92 | } else { |
| 93 | firstSlaveHost = false; |
| 94 | } |
| 95 | |
| 96 | if (hostPortPair[HOST_NAME_INDEX] != null) { |
| 97 | slaveHosts.append(hostPortPair[HOST_NAME_INDEX]); |
| 98 | } |
| 99 | |
| 100 | if (hostPortPair[PORT_NUMBER_INDEX] != null) { |
| 101 | slaveHosts.append(":"); |
| 102 | slaveHosts.append(hostPortPair[PORT_NUMBER_INDEX]); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if (slaveHosts.length() == 0) { |
| 107 | throw SQLError.createSQLException( |
| 108 | "Must specify at least one slave host to connect to for master/slave replication load-balancing functionality", |
| 109 | SQLError.SQL_STATE_INVALID_CONNECTION_ATTRIBUTE); |
| 110 | } |
| 111 | |
| 112 | masterProps.setProperty(HOST_PROPERTY_KEY, masterHost.toString()); |
| 113 | slavesProps.setProperty(HOST_PROPERTY_KEY, slaveHosts.toString()); |
| 114 | } |
| 115 | |
| 116 | return new ReplicationConnection(masterProps, slavesProps); |
| 117 | } |
| 118 | } |