Differences

This shows you the differences between two versions of the page.

--- v5:loadbalancer:mysql_replication:creating_connections [2016/06/13 01:11] – mnewnham
+++ v5:loadbalancer:mysql_replication:creating_connections [2017/04/28 02:09] (current) – mnewnham
@@ Line 4: / Line 4: @@
 Each of the connections in the connection pool are defined in the exact same way as a normal ADOdb connection, which makes it simple to add the functionality of existing code. This is shown below:
-^Existing ADOdb Connection^Load Balance|
+^ Existing ADOdb Connection                                   ^ Load Balance                                                                                  ^
-|
+|                                                             | Instantiate Load Balancer as $db                                                              |
+| Instantiate ADOdb as $db                                    | Instantiate ADOdb as $db0, designating the connection as the primary (read-write) connection  |
+| Connect $db to database using normal connection parameters  | Connect $db0 to database using normal connection parameters                                   |
+|                                                             | Add connection $db0 to connection pool $db                                                    |
+|                                                             | Instantiate ADOdb as $db1, designating the connection as a secondary (read-only) connection   |
+|                                                             | Add Connection $db1 to connection pool $db                                                    |
+|                                                             | Repeat for available number of secondary servers                                              |
+| Execute commands against connection $db                     | Execute commands against connection pool $db                                                  |
+We show that here, first by creating a normal connection, using a MySQL database
+<code php>
+$db = newAdoConnection('mysqli');
+$db->connect('host','user','pass','database');
+$db->execute('select * from employees');
+</code>
+If we create a load balanced connection, but only assign one server, the method is exactly the same
+<code php>
+$db = new ADOdbLoadBalancer;
+$db0 = new ADOdbLoadBalancerConnection('write',1,'host','user','pass','database');
+$db->addConnection($db0);
+$db->execute('select * from employees')
+</code>
+Note that because we have not assigned any ''readonly'' nodes, the ''write'' node assumes the responsibility