Magento Implementation

2min
When we trigger a sync from Magento, whether via cron or CLI, Klevu\Indexing\Service\EntitySyncOrchestratorService::execute is executed. 
This loops through all entityIndexerServices. 
These entityIndexerServices are injected via di.xml from each entity indexing module  (module-m2-indexing-categories, module-m2-indexing-cms, module-ms-indexing-products).
e.g. from module-ms-indexing-products/etc/di.xml
XML
<type name="Klevu\Indexing\Service\EntitySyncOrchestratorService">
    <arguments>
        <argument name="entityIndexerServices" xsi:type="array">
            <item name="KLEVU_PRODUCT" xsi:type="array">
                <item name="add"
                      xsi:type="object">Klevu\IndexingProducts\Service\EntityIndexerService\Add</item>
                ...
            </item>
        </argument>
    </arguments>
</type> 
<type name="Klevu\Indexing\Service\EntitySyncOrchestratorService">
    <arguments>
        <argument name="entityIndexerServices" xsi:type="array">
            <item name="KLEVU_PRODUCT" xsi:type="array">
                <item name="add"
                      xsi:type="object">Klevu\IndexingProducts\Service\EntityIndexerService\Add</item>
                ...
            </item>
        </argument>
    </arguments>
</type> 
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The injected EntityIndexerService is a virtual type, into which we pass an EntityIndexingRecordProvider and a pipeline YAML file.
XML
<virtualType name="Klevu\IndexingProducts\Service\EntityIndexerService\Add"
             type="Klevu\IndexingProducts\Service\EntityIndexerService">
    <arguments>
        <argument name="entityIndexingRecordProvider"
                  xsi:type="object">Klevu\IndexingProducts\Service\Provider\Sync\EntityIndexingRecordProvider\Add</argument>
        <argument name="pipelineConfigurationFilepath"
                  xsi:type="string">Klevu_IndexingProducts::etc/pipeline/add_update.yml</argument>
    </arguments>
</virtualType> 
<virtualType name="Klevu\IndexingProducts\Service\EntityIndexerService\Add"
             type="Klevu\IndexingProducts\Service\EntityIndexerService">
    <arguments>
        <argument name="entityIndexingRecordProvider"
                  xsi:type="object">Klevu\IndexingProducts\Service\Provider\Sync\EntityIndexingRecordProvider\Add</argument>
        <argument name="pipelineConfigurationFilepath"
                  xsi:type="string">Klevu_IndexingProducts::etc/pipeline/add_update.yml</argument>
    </arguments>
</virtualType> 
﻿
The EntityIndexingRecordProvider will provide the records to index.
The pipelineConfigurationFilepath contains the default yaml file containing instructions on how to process those records.
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Pipelines
Pipelines Customisation