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better concurrency handling #58

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merged 1 commit into from
Jun 28, 2016
Merged

better concurrency handling #58

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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ Write concern

This adapter uses a transaction timeout of 50 secs by default.

The default write concern for this adapater is acknowledged and journaled (['w' => 1, 'j' => true]).
The default write concern for this adapater is acknowledged (['w' => 1]).

It's possible to change both values by injecting them into the constructor or by using the factory.

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8 changes: 6 additions & 2 deletions src/MongoDbEventStoreAdapter.php
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Expand Up @@ -73,7 +73,6 @@ final class MongoDbEventStoreAdapter implements Adapter, CanHandleTransaction
*/
private $writeConcern = [
'w' => 1,
'j' => true
];

/**
Expand Down Expand Up @@ -174,8 +173,13 @@ public function appendTo(StreamName $streamName, Iterator $streamEvents)

try {
$insertBatch->execute();
} catch (\MongoDuplicateKeyException $e) {
throw new ConcurrencyException('At least one event with same version exists already', 0, $e);
} catch (\MongoWriteConcernException $e) {
throw new ConcurrencyException('', 0, $e);
$code = $e->getDocument()['writeErrors'][0]['code'];
if (in_array($code, [11000, 11001, 12582])) {
throw new ConcurrencyException('At least one event with same version exists already', 0, $e);
}
}
}

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