DCB

[DavidBadura]

Implement Dynamic Consistency Boundary according to https://dcb.events/.

The following examples were partially implemented:

• Course subscription
• Invoice number

There are still some questions open:

•  How do we handle the different streams? It should be possible to use different streams for different bounded contexts. Currently, this is not reflected in the API.
•  The EventTagExtractor must handle value objects. The current implementation requires PHP's Stringable interface, which requires a __toString() method. Since this can lead to problems, we need an alternative.
•  Filtering event types is not yet implemented.
• Is archiving still possible? Is it necessary? Can this possibly be implemented with tags? -> for DCB: no
• The Projection API isn't fully developed yet. Returning QueryComponent instead of tags directly? Apply should be converted to Attributes.

[github-actions]

Hello 👋

here is the most recent benchmark result:

SimpleSetupStreamStoreBench
===========================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 1.010ms (±0.00%)   | 1.027ms (±0.00%)   | -1.67%    | 35.201mb        | 34.991mb   | +0.60%      |
| benchLoad10000Events ()                | 57.046ms (±0.00%)  | 58.368ms (±0.00%)  | -2.26%    | 35.201mb        | 34.528mb   | +1.95%      |
| benchSave1Event ()                     | 1.080ms (±0.00%)   | 1.091ms (±0.00%)   | -0.98%    | 34.674mb        | 34.528mb   | +0.42%      |
| benchSave10000Events ()                | 292.100ms (±0.00%) | 294.342ms (±0.00%) | -0.76%    | 34.674mb        | 34.528mb   | +0.42%      |
| benchSave10000Aggregates ()            | 8.217s (±0.00%)    | 8.306s (±0.00%)    | -1.07%    | 34.674mb        | 34.528mb   | +0.42%      |
| benchSave10000AggregatesTransaction () | 5.101s (±0.00%)    | 5.080s (±0.00%)    | +0.41%    | 34.674mb        | 34.528mb   | +0.42%      |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SubscriptionEngineBatchBench
============================

+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                                   | memory                                     |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>    | Tag: base         | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 76.375ms (±0.00%) | 76.020ms (±0.00%) | +0.47%    | 34.961mb        | 34.813mb   | +0.43%      |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+

SnapshotsBench
==============

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad10000EventsMissingSnapshot () | 53.304ms (±0.00%)  | 55.203ms (±0.00%)  | -3.44%    | 34.565mb        | 34.418mb   | +0.42%      |
| benchLoad10000Events ()                | 890.300μs (±0.00%) | 961.600μs (±0.00%) | -7.41%    | 34.564mb        | 34.418mb   | +0.42%      |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SubscriptionEngineBench
=======================

+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                               | memory                                     |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>  | Tag: base       | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 3.251s (±0.00%) | 3.168s (±0.00%) | +2.63%    | 47.107mb        | 46.961mb   | +0.31%      |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+

SimpleSetupTaggableStoreBench
=============================

+----------------------------------------+--------------------+-----------+-----------------+-------------+
|                                        | time (kde mode)                | memory                        |
+----------------------------------------+--------------------+-----------+-----------------+-------------+
| subject                                | Tag: <current>     | time-diff | Tag: <current>  | memory-diff |
+----------------------------------------+--------------------+-----------+-----------------+-------------+
| benchLoad1Event ()                     | 897.000μs (±0.00%) | +0.00%    | 35.821mb        | +0.00%      |
| benchLoad10000Events ()                | 58.174ms (±0.00%)  | +0.00%    | 35.822mb        | +0.00%      |
| benchSave1Event ()                     | 1.032ms (±0.00%)   | +0.00%    | 35.821mb        | +0.00%      |
| benchSave10000Events ()                | 316.585ms (±0.00%) | +0.00%    | 35.822mb        | +0.00%      |
| benchSave10000Aggregates ()            | 8.345s (±0.00%)    | +0.00%    | 35.822mb        | +0.00%      |
| benchSave10000AggregatesTransaction () | 5.137s (±0.00%)    | +0.00%    | 35.822mb        | +0.00%      |
| benchAppend1Event ()                   | 1.148ms (±0.00%)   | +0.00%    | 35.822mb        | +0.00%      |
| benchAppend100Events ()                | 7.221ms (±0.00%)   | +0.00%    | 35.822mb        | +0.00%      |
+----------------------------------------+--------------------+-----------+-----------------+-------------+

SimpleSetupBench
================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 858.400μs (±0.00%) | 997.700μs (±0.00%) | -13.96%   | 34.560mb        | 34.344mb   | +0.63%      |
| benchLoad10000Events ()                | 52.061ms (±0.00%)  | 52.938ms (±0.00%)  | -1.66%    | 34.560mb        | 34.344mb   | +0.63%      |
| benchSave1Event ()                     | 987.300μs (±0.00%) | 1.021ms (±0.00%)   | -3.34%    | 34.560mb        | 34.344mb   | +0.63%      |
| benchSave10000Events ()                | 216.324ms (±0.00%) | 215.970ms (±0.00%) | +0.16%    | 34.560mb        | 34.344mb   | +0.63%      |
| benchSave10000Aggregates ()            | 8.276s (±0.00%)    | 8.260s (±0.00%)    | +0.19%    | 34.560mb        | 34.344mb   | +0.63%      |
| benchSave10000AggregatesTransaction () | 4.900s (±0.00%)    | 4.872s (±0.00%)    | +0.56%    | 34.560mb        | 34.344mb   | +0.63%      |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SplitStreamBench
================

+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                         | time (kde mode)                                     | memory                                     |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                 | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad10000Events () | 4.549ms (±0.00%)   | 4.602ms (±0.00%)   | -1.13%    | 37.867mb        | 37.721mb   | +0.39%      |
| benchSave10000Events () | 333.607ms (±0.00%) | 340.701ms (±0.00%) | -2.08%    | 37.869mb        | 37.723mb   | +0.39%      |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

PersonalDataBench
=================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 855.200μs (±0.00%) | 917.300μs (±0.00%) | -6.77%    | 35.693mb        | 35.548mb   | +0.41%      |
| benchLoad10000Events ()                | 94.801ms (±0.00%)  | 95.616ms (±0.00%)  | -0.85%    | 35.693mb        | 35.548mb   | +0.41%      |
| benchSave1Event ()                     | 1.458ms (±0.00%)   | 1.545ms (±0.00%)   | -5.60%    | 35.693mb        | 35.548mb   | +0.41%      |
| benchSave10000Events ()                | 256.692ms (±0.00%) | 260.156ms (±0.00%) | -1.33%    | 35.695mb        | 35.549mb   | +0.41%      |
| benchSave10000Aggregates ()            | 12.622s (±0.00%)   | 12.590s (±0.00%)   | +0.25%    | 35.693mb        | 35.548mb   | +0.41%      |
| benchSave10000AggregatesTransaction () | 9.105s (±0.00%)    | 9.128s (±0.00%)    | -0.25%    | 36.196mb        | 36.050mb   | +0.40%      |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

This comment gets update everytime a new commit comes in!