Returns if the specified command will perform a read-only operation
on Redis or not.
| public isReadOperation ( Predis\Command\CommandInterface $command ) : boolean | ||
| $command | Predis\Command\CommandInterface | Command instance. |
| 리턴 | boolean | |
/**
* {@inheritdoc}
*/
public function getConnection(CommandInterface $command)
{
$connection = $this->getConnectionInternal($command);
if (!$connection->isConnected()) {
// When we do not have any available slave in the pool we can expect
// read-only operations to hit the master server.
$expectedRole = $this->strategy->isReadOperation($command) && $this->slaves ? 'slave' : 'master';
$this->assertConnectionRole($connection, $expectedRole);
}
return $connection;
}
/**
* {@inheritdoc}
*/
public function getConnectionByCommand(CommandInterface $command)
{
if (!$this->current) {
if ($this->strategy->isReadOperation($command) && ($slave = $this->pickSlave())) {
$this->current = $slave;
} else {
$this->current = $this->getMasterOrDie();
}
return $this->current;
}
if ($this->current === ($master = $this->getMasterOrDie())) {
return $master;
}
if (!$this->strategy->isReadOperation($command) || !$this->slaves) {
$this->current = $master;
}
return $this->current;
}
/**
* @group disconnected
*/
public function testSetLuaScriptAsReadOperationWorksWithScriptedCommandAndCallableCheck()
{
$strategy = new ReplicationStrategy();
$command = $this->getMock('Predis\\Command\\ScriptedCommand', array('getScript'));
$command->expects($this->any())->method('getScript')->will($this->returnValue($script = 'return true'));
$command->setArguments(array('trigger', false));
$strategy->setScriptReadOnly($script, true);
$this->assertTrue($strategy->isReadOperation($command));
}