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authorFelix Balfoort <fhjbalfoort@gmail.com>2011-11-29 15:53:01 +0100
committerFelix Balfoort <fhjbalfoort@gmail.com>2011-11-29 15:53:01 +0100
commitea6e466309887cef69f5685f97d17e6e6b335c2f (patch)
tree66c925650eee47f35a4fa7d5a5b42c648cde835d /system/database/DB_driver.php
parent0bb866e6e1c55a536a3029eaaf1913e46512a51a (diff)
The DB_driver can now use failover databases if specified
The DB_driver can now use failover databases if specified. If the main connection shouldn't connect for some reason the DB_driver will now try to connect to specified connections in the failover config. Example config: $db['default']['hostname'] = 'localhost'; $db['default']['username'] = ''; $db['default']['password'] = ''; $db['default']['database'] = ''; $db['default']['dbdriver'] = 'mysql'; $db['default']['dbprefix'] = ''; $db['default']['pconnect'] = TRUE; $db['default']['db_debug'] = TRUE; $db['default']['cache_on'] = FALSE; $db['default']['cachedir'] = ''; $db['default']['char_set'] = 'utf8'; $db['default']['dbcollat'] = 'utf8_general_ci'; $db['default']['swap_pre'] = ''; $db['default']['autoinit'] = TRUE; $db['default']['stricton'] = FALSE; $db['default']['failover'] = array(); $db['default']['failover'][0]['hostname'] = 'localhost1'; $db['default']['failover'][0]['username'] = ''; $db['default']['failover'][0]['password'] = ''; $db['default']['failover'][0]['database'] = ''; $db['default']['failover'][0]['dbdriver'] = 'mysql'; $db['default']['failover'][0]['dbprefix'] = ''; $db['default']['failover'][0]['pconnect'] = TRUE; $db['default']['failover'][0]['db_debug'] = TRUE; $db['default']['failover'][0]['cache_on'] = FALSE; $db['default']['failover'][0]['cachedir'] = ''; $db['default']['failover'][0]['char_set'] = 'utf8'; $db['default']['failover'][0]['dbcollat'] = 'utf8_general_ci'; $db['default']['failover'][0]['swap_pre'] = ''; $db['default']['failover'][0]['autoinit'] = TRUE; $db['default']['failover'][0]['stricton'] = FALSE; $db['default']['failover'][0]['failover'] = array(); $db['default']['failover'][1]['hostname'] = 'localhost2'; $db['default']['failover'][1]['username'] = ''; $db['default']['failover'][1]['password'] = ''; $db['default']['failover'][1]['database'] = ''; $db['default']['failover'][1]['dbdriver'] = 'mysql'; $db['default']['failover'][1]['dbprefix'] = ''; $db['default']['failover'][1]['pconnect'] = TRUE; $db['default']['failover'][1]['db_debug'] = TRUE; $db['default']['failover'][1]['cache_on'] = FALSE; $db['default']['failover'][1]['cachedir'] = ''; $db['default']['failover'][1]['char_set'] = 'utf8'; $db['default']['failover'][1]['dbcollat'] = 'utf8_general_ci'; $db['default']['failover'][1]['swap_pre'] = ''; $db['default']['failover'][1]['autoinit'] = TRUE; $db['default']['failover'][1]['stricton'] = FALSE; $db['default']['failover'][1]['failover'] = array(); Signed-off-by: Felix Balfoort <fhjbalfoort@gmail.com>
Diffstat (limited to 'system/database/DB_driver.php')
-rw-r--r--system/database/DB_driver.php37
1 files changed, 32 insertions, 5 deletions
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index cc40ba48a..c2d57a833 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -126,16 +126,43 @@ class CI_DB_driver {
// Connect to the database and set the connection ID
$this->conn_id = ($this->pconnect == FALSE) ? $this->db_connect() : $this->db_pconnect();
- // No connection resource? Throw an error
+ // No connection resource? Check if there is a failover else throw an error
if ( ! $this->conn_id)
{
- log_message('error', 'Unable to connect to the database');
+ // Check if there is a failover set
+ if ( ! empty($this->failover) && is_array($this->failover))
+ {
+ // Go over all the failovers
+ foreach ($this->failover as $failover)
+ {
+ // Replace the current settings with those of the failover
+ foreach ($failover as $key => $val)
+ {
+ $this->$key = $val;
+ }
- if ($this->db_debug)
+ // Try to connect
+ $this->conn_id = ($this->pconnect == FALSE) ? $this->db_connect() : $this->db_pconnect();
+
+ // If a connection is made break the foreach loop
+ if ($this->conn_id)
+ {
+ break;
+ }
+ }
+ }
+
+ // We still don't have a connection?
+ if ( ! $this->conn_id)
{
- $this->display_error('db_unable_to_connect');
+ log_message('error', 'Unable to connect to the database');
+
+ if ($this->db_debug)
+ {
+ $this->display_error('db_unable_to_connect');
+ }
+ return FALSE;
}
- return FALSE;
}
// ----------------------------------------------------------------