Magento 2.1 ee content staging

© 2016 Magento, Inc. Page | 1
2.1 EE Content
Staging Technical
overview

Software Architect at Magento
Anton Kaplya

Agenda
• What is Content Staging
• How Content Staging works
• How to work with Content Staging

Magento Staging
Scheduling data changes for ecommerce
entities

What is Content Staging
• Scheduling data changes
• Instant Preview
• Automatic changes deployment

Magento Content Staging

Magento Staging Dashboard

Magento Content Staging Preview

Supported Entities
• Products & Categories
• CMS Pages & Blocks
• Cart Price Rules
• Catalog Rule

How Content Staging works

MVCC
• Multiversion Concurrency Control
• InnoDB transaction engine is built upon MVCC
• Copy on change

MVCC
1 100 150 200
A
50 MAX
A'
A''
B
B'
C

How MVCC influences Magento
• Entity may have several representations in main table
• Creation time
• Expiration time

Assumptions & Agreements
• We use UNIX_TIMESTAMP as a pointer for versions
• Default value for creation time is 1
• Default for value expiration time is MAX INT

Table structure
CREATE TABLE entity_table (
row_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
entity_id UNSIGNED NOT NULL,
created_in BIGINT UNSIGNED NOT NULL,
updated_in BIGINT UNSIGNED NOT NULL,
...
PRIMARY KEY ( row_id),
KEY ix_entity_id ( entity_id),
KEY ix_created_in ( created_in),
KEY ix_updated_in ( updated_in)
) ENGINE=InnoDB;

Example
SELECT
e.row_id, e.entity_id, e.created_in,
e.updated_in, v.value
FROM catalog_product_entity e
JOIN catalog_product_entity_varchar v
ON v.row_id = e.row_id AND v.attribute_id = 73
WHERE e.entity_id = 1;

Creation of new entity
+--------+-----------+------------+------------+-----------+
| row_id | entity_id | created_in | updated_in | value |
+--------+-----------+------------+------------+-----------+
| 1 | 1 | 1 | 2147483647 | Green Car |
+--------+-----------+------------+------------+-----------+

Create a new version for entity
+--------+-----------+------------+------------+-----------+
+--------+-----------+------------+------------+-----------+
| 1 | 1 | 1 | 1474829340 | Green Car |
| 2 | 1 | 1474829340 | 2147483647 | Blue Car |
+--------+-----------+------------+------------+-----------+

Create several future versions
+--------+-----------+------------+------------+-----------+
+--------+-----------+------------+------------+-----------+
| 1 | 1 | 1 | 1474829340 | Green Car |
| 2 | 1 | 1474829340 | 1474988880 | Blue Car |
| 3 | 1 | 1474988880 | 1475161680 | Red Car |
| 4 | 1 | 1475161680 | 2147483647 | Blue Car |
+--------+-----------+------------+------------+-----------+

How select works

How select works
WHERE (created_in <= 125 AND updated_in > 125)
+--------+-----------+------------+------------+
| row_id | entity_id | created_in | updated_in |
+--------+-----------+------------+------------+
| 1 | 1 | 1 | 100 |
| 2 | 1 | 100 | 200 |
| 3 | 1 | 200 | 2147483647 |
| 4 | 2 | 1 | 150 |
| 5 | 2 | 150 | 2147483647 |
| 6 | 3 | 1 | 2147483647 |
+--------+-----------+------------+------------+

How SELECT works (Query)
SELECT e.row_id, e.entity_id,
e.created_in, e.updated_in, v.value
FROM catalog_product_entity e
JOIN catalog_product_entity_varchar v ON v.row_id = e.row_id
AND v.attribute_id = 73
WHERE e.entity_id = 1
AND (e.created_in <= 1474828140
AND updated_in > 1474828140
);

How SELECT works (Data)
+--------+-----------+------------+------------+-----------+
+--------+-----------+------------+------------+-----------+
| 1 | 1 | 1 | 1474829340 | Green Car |
+--------+-----------+------------+------------+-----------+
| 2 | 1 | 1474829340 | 2147483647 | Blue Car |
+--------+-----------+------------+------------+-----------+

How to work with
Content Staging
Short notice for extension developers

Content Staging & Code Compatibility
• Magento API supports data versioning
• Collection API supports data versioning
• MagentoDbSelect except case with attribute table join;

How to query values from attribute table
• Do not use direct SQLs
• If you do not have other choice

Example: how to query attributes from table
$metadata = $pool->getMetadata(ProductInterface::class);
$linkField = $this->metadata->getLinkField();
$connection->select()
->from(['e' => $entityTable], ['e.entity_id']);
->join(
['a' => $attributeTable],
'a.' . $linkField . ' = e.' . $linkField
);

Summary
• Scheduling data changes
• Instant Preview
• Automatic changes deployment

Q&A

Magento 2.1 ee content staging

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