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The issue is being caused by the use of @magentoDataFixture annotation, which creates a temporary data fixture that is rolled back after each test execution1. This means that the customer address created by the fixture is not persisted in the database and cannot be retrieved by subsequent tests. To fix this, the Architect should use @magentoPersistDataFixture annotation, which creates a permanent data fixture that is not rolled back after each test execution2. This way, the customer address created by the fixture will be persisted in the database and can be accessed by subsequent tests. Changing the annotation to use @magentoApiDataFixture or specifying address_id in the annotation will not solve the issue, as they are not related to the persistence of the data fixture3. References: Data fixtures, Persistent data fixtures, API-functional tests

To display additional content on the home page based on a custom customer attribute, the Architect needs to do the following steps:

Add a new context value of “my_attribute” to Magento\Framework\App\Http\Context. This will allow the Full Page Cache to generate different versions of the page for customers with different values of “my.attribute”. The context value can be set using a plugin on the Magento\Customer\Model\Context class.

Add a dynamic block with the content to the Home Page. A dynamic block is a type of content block that can be configured to display only to specific customer segments or conditions. The Architect can use the ‘my.attribute’ in the conditions of the dynamic block and assign it to the Home Page in the Content > Blocks section of the Admin Panel. References:

Private content | Magento 2 Developer Documentation

Dynamic Blocks | Adobe Commerce 2.3 User Guide - Magento

Option A is correct because enabling the config flag under deployment/blue_green/enabled is one of the steps to ensure zero downtime during the deployment process of Magento 2 on-premises. This flag enables the blue-green deployment feature, which allows deploying a new version of the Magento application to a separate environment (blue) without affecting the current live environment (green). Once the new version is ready, the traffic can be switched from green to blue with minimal or no downtime1.

Option C is correct because running bin/magento setup:upgrade --keep-generated is another step to ensure zero downtime during the deployment process of Magento 2 on-premises. This command updates the database schema and data without deleting the generated code and static view files. This way, the Magento application can still serve requests from the cache while the database is being upgraded2.

Option B is incorrect because running bin/magento setup:upgrade --dry-run=true does not upgrade the database, but only checks if there are any errors or conflicts in the database schema or data. This command can be used for testing purposes, but it does not affect the deployment process or the downtime3.

Option D is incorrect because there is no such option as --convert-old-scripts-true for the bin/magento setup:upgrade command. This option does not exist in Magento 2 and does not have any effect on the deployment process or the downtime.

Option E is incorrect because there is no such config flag as developer/zero_down_time/enabled in Magento 2. This flag does not exist in Magento 2 and does not have any effect on the deployment process or the downtime.

References:

1: Blue-green deployment | Adobe Commerce Developer Guide

2: Deploy Magento to production | Adobe Commerce Developer Guide

3: Command-line installation options | Adobe Commerce Developer Guide

Option A is correct because setting the consumers_wait_for_max_messages variable true in the deployment stage is the best way to meet the requirement. This variablecontrols whether the queue consumers should wait for a maximum number of messages to process before terminating. If this variable is set to true, the consumers will not terminate after processing the available messages in the queue, but will wait until they reach the max_messages limit or the cron job timeout. This way, the consumers can keep the TCP connections open and avoid delays in processing messages1.

Option B is incorrect because increasing the multiple_process limit to spawn more processes for each consumer will not solve the issue of queue consumers closing TCP connections too often. The multiple_process limit determines how many parallel processes can be run for each consumer. Increasing this limit may improve the throughput of message processing, but it will also consume more server resources and may cause conflicts or errors. Moreover, it will not prevent the consumers from terminating after processing the available messages in the queue2.

Option C is incorrect because changing the max_messages from 10,000 to 1,000 for CRON_CONSUMERS_RUNNER variable will worsen the issue of queue consumers closing TCP connections too often. The max_messages variable defines how many messages each consumer should process before terminating. Decreasing this variable will make the consumers terminate more frequently, which will result in more TCP connections being closed and reopened. This will increase the delays in processing messages3.

References:

1: Configure message queues | Adobe Commerce Developer Guide

2: Configure message queues | Adobe Commerce Developer Guide

3: Configure message queues | Adobe Commerce Developer Guide

The Architect can take the following steps to ensure validation of the configuration files with unique validation rules for the individual and merged files:

Create validation rules in marketplace.schema.xsd. This file defines the structure and constraints of the XML elements and attributes for the marketplace.feeds.xml configuration file. The Architect can use this file to specify the required and optional elements, data types, values, and patterns for the configuration file.

Provide schema to validate a merged file. This schema is used to validate the final configuration file that is generated after merging all the individual configuration files from different modules. The Architect can use this schema to check the consistency and completeness of the merged configuration file.

Provide schema to validate an individual file. This schema is used to validate each individual configuration file from each module before merging them. The Architect can use this schema to check the syntax and validity of each configuration file.

References: https://experienceleague.adobe.com/docs/commerce-cloud-service/user-guide/architecture/starter-architecture.html?lang=en#configuration-files 1 https://devdocs.magento.com/guides/v2.4/extension-dev-guide/build/XSD-XML-validation.html 2

The group property determines which section of the customer account the attribute belongs to. By setting the group property to 1, the reward_card_number attribute will be assigned to the default group, which is the Account Information section. This will make the attribute available in the My account/My rewards page template. References: https://experienceleague.adobe.com/docs/commerce-admin/customers/customer-accounts/attributes/attribute-properties.html?lang=en#group 1

This action is necessary to make the attribute available for content staging and preview. According to the Adobe Commerce documentation, the catalogstaging_category_update_form.xml file defines the fields that are displayed in the Scheduled Changes section of the category form. The file extends the category_form.xml file and adds additional fields that are specific to content staging, such as start and end dates, campaign name, description, etc. To include a custom category attribute in the Scheduled Changes section, the attribute must also be declared in the catalogstaging_category_update_form.xml file with the same configuration as in the category_form.xml file.

References:

Content staging | Adobe Commerce Developer Guide

Create a category attribute | Adobe Commerce Developer Guide

To add a product type with custom pricing, the Architect needs to do the following steps:

Create a content of the etc/product_types.xml file that defines the new product type, its label, model, index priority, and price model. This file is used to register the new product type and its associated classes in Magento1.

Create a new price model that extends \Magento\Catalog\Model\Product\Type\Price and implements the custom pricing logic for the new product type. The price model is responsible for calculating the final price of the product based on various factors, such as special price, tier price, catalog price rules, etc2.

Create a custom type model that extends from the abstract Product Type model (\Magento\Catalog\Model\Product\Type\AbstractType) and overrides the methods related to the product type behavior, such as prepareForCart, getAssociatedProducts, etc. The type model defines how the product type interacts with other components, such as quote, order, cart, etc3. References:

How to add a new product type in Magento 2? (MageStackDay mystery question 1) - Magento Stack Exchange

Magento 2: How to create custom product types - BelVG Blog

Magento 2: How to create custom product types - BelVG Blog

According to the Adobe Commerce documentation, the correct approach to change the stopwords directory inside a custom module is to use dependency injection to override the default values of the stopwordsDirectory and stopwordsModule parameters of the \Magento\Elasticsearch\SearchAdapter\Query\Preprocessor\Stopwords class. The stopwordsDirectory parameter specifies the relative path of the stopwords directory from the module directory, while the stopwordsModule parameter specifies the name of the module that contains the stopwords directory. By adding these parameters to the di.xml file of the custom module, the Architect can change the location of the stopwords files without modifying the core code or database.

References:

To change the directory from your module

Configure Elasticsearch stopwords

To make sure the vcl_hash function of Varnish considers the newly created attribute, the Architect needs to do the following steps:

Create a new class that implements the Magento\GraphQlCache\Model\CacheId\CacheIdFactorProviderInterface interface. This interface defines two methods: getFactorName and getFactorValue. The getFactorName method should return the name of the attribute, in this case, my_attribute. The getFactorValue method should return the value of the attribute for the current customer, which can be obtained from the customer session or customer repository1.

Add this class to the idFactorProviders array of Magento\GraphQlCache\Model\CacheId\CacheIdCalculator through dependency injection. The CacheIdCalculator is responsible for generating a cache ID for each GraphQL request based on the factors provided by the idFactorProviders. By adding the new class to this array, the Architect ensures that the cache ID will include the value of my_attribute1.

The cache ID is then used by Varnish to hash and lookup the cached response for each request. By including my_attribute in the cache ID, the Architect ensures that Varnish will serve different responses based on the attribute value of the customer2. References:

Magento_GraphQlCache module | Magento 2 Developer Documentation

Varnish caching | Adobe Commerce 2.4 User Guide - Magento