82 lines
2.8 KiB
Plaintext
82 lines
2.8 KiB
Plaintext
++ View
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++ Profiler
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+++ Introduction
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{{Doctrine_Connection_Profiler}} is an eventlistener for {{Doctrine_Connection}}. It provides flexible query profiling. Besides the SQL strings the query profiles include elapsed time to run the queries. This allows inspection of the queries that have been performed without the need for adding extra debugging code to model classes.
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{{Doctrine_Connection_Profiler}} can be enabled by adding it as an eventlistener for {{Doctrine_Connection}}.
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<code type='php'>
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$conn = Doctrine_Manager::connection($dsn);
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$profiler = new Doctrine_Connection_Profiler();
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$conn->setListener($profiler);
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</code>
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+++ Basic usage
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Perhaps some of your pages is loading slowly. The following shows how to build a complete profiler report from the connection:
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<code type='php'>
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$totalTime = $profiler->getTotalElapsedSecs();
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$queryCount = $profiler->getTotalNumQueries();
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$longestTime = 0;
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$longestQuery = null;
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foreach ($profiler->getQueryProfiles() as $query) {
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if ($query->getElapsedSecs() > $longestTime) {
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$longestTime = $query->getElapsedSecs();
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$longestQuery = $query->getQuery();
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}
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}
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echo 'Executed ' . $queryCount . ' queries in ' . $totalTime . ' seconds' . "\n";
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echo 'Average query length: ' . $totalTime / $queryCount . ' seconds' . "\n";
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echo 'Queries per second: ' . $queryCount / $totalTime . "\n";
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echo 'Longest query length: ' . $longestTime . "\n";
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echo 'Longest query: ' . $longestQuery . "\n";
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</code>
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+++ Advanced usage
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++ Cache
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++ Locking Manager
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++ Connection Profiler
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++ Hook
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++ Soft-delete
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Soft-delete is a very simple plugin for achieving the following behaviour: when a record is deleted its not removed from database. Usually the record contains some special field like 'deleted' which tells the state of the record (deleted or alive).
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The following code snippet shows what you need in order to achieve this kind of behaviour. Notice how we define two event hooks: preDelete and postDelete. Also notice how the preDelete hook skips the actual delete-operation with skipOperation() call. For more info about the event hooks see the Event listener section.
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<code type='php'>
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class SoftDeleteTest extends Doctrine_Record
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{
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public function setTableDefinition()
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{
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$this->hasColumn('name', 'string', null, array('primary' => true));
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$this->hasColumn('deleted', 'boolean', 1);
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}
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public function preDelete($event)
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{
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$event->skipOperation();
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}
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public function postDelete($event)
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{
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$this->deleted = true;
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$this->save();
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}
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}
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</code>
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Now lets put the plugin in action:
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<code type='php'>
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// save a new record
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$record = new SoftDeleteTest();
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$record->name = 'new record';
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$record->save();
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$record->delete();
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var_dump($record->deleted); // true
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</code>
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