MAGE-1281 Add config to forward primary index settings to replicas

Author: cammonro

Helper/ConfigHelper.php

@@ -1362,6 +1362,15 @@ public function getWriteTimeout($storeId = null)
         return $this->configInterface->getValue(self::WRITE_TIMEOUT, ScopeInterface::SCOPE_STORE, $storeId);
     }
 
+    public function shouldForwardPrimaryIndexSettingsToReplicas(?int $storeId = null): bool
+    {
+        return $this->configInterface->isSetFlag(
+            self::FORWARD_TO_REPLICAS,
+            ScopeInterface::SCOPE_STORE,
+            $storeId
+        );
+    }
+
     public function isAutoPriceIndexingEnabled(?int $storeId = null): bool
     {
         return $this->configInterface->isSetFlag(

etc/adminhtml/system.xml

@@ -1522,6 +1522,17 @@
                 <field id="write_timeout" translate="label comment" type="text" sortOrder="110" showInDefault="1">
                     <label>Write Timeout (In Seconds)</label>
                 </field>
+                <field id="forward_to_replicas" translate="label comment" type="select" sortOrder="115" showInDefault="1" showInWebsite="1" showInStore="1">
+                    <label>Forward index settings to replicas</label>
+                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
+                    <comment>
+                        <![CDATA[
+                            When this configuration is enabled, settings that are changed in Algolia on the primary index will also be forwarded to its replica indices. It is enabled by default.
+                            <br><br>
+                            The ability to disable this behavior is retained for legacy implementations, but it is highly recommended that you leave this setting enabled especially if you are using dynamic facets.
+                        ]]>
+                    </comment>
+                </field>
                 <field id="auto_price_indexing" translate="label comment" type="select" sortOrder="120" showInDefault="1" showInWebsite="1" showInStore="1">
                     <label>Enable automatic price indexing</label>
                     <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>

etc/config.xml

@@ -122,6 +122,7 @@
                 <connection_timeout>2</connection_timeout>
                 <read_timeout>30</read_timeout>
                 <write_timeout>30</write_timeout>
+                <forward_to_replicas>1</forward_to_replicas>
                 <auto_price_indexing>0</auto_price_indexing>
                 <enable_profiler>0</enable_profiler>
             </advanced>