Disable FPC per website or store

Question

Does anyone know if there is a method to tell the system to not Full Page Cache a specific store or website? And just to be clear, using EE FPC out of the box.

Answer 1

In system.xml create config value which can be configurable per store view:

<enabled translate="label">
    <label>Enable FPC</label>
    <frontend_type>select</frontend_type>
    <source_model>adminhtml/system_config_source_yesno</source_model>
    <sort_order>10</sort_order>
    <show_in_default>1</show_in_default>
    <show_in_website>1</show_in_website>
    <show_in_store>1</show_in_store>
</enabled>

Do not forget to set default value for it in config.xml to 1.

Than in the <frontend> section register observer on controller_action_predispatch event:

<events>
    <controller_action_predispatch>
        <observers>
            <namespace_module>
                <class>namespace_module/observer</class>
                <method>processPreDispatch</method>
            </namespace_module>
        </observers>
    </controller_action_predispatch>
</events>

Now create observer with processPreDispatch method where you can check config value and disable FPC.

public function processPreDispatch(Varien_Event_Observer $observer)
{
    if (!Mage::getStoreConfigFlag('path/to/enabled')) {
        // Tell Magento to 'ban' the use of FPC for current sore view
        $cache = Mage::app()->getCacheInstance()->banUse('full_page');
    }
}

Clear all cache types.