DiffusionCacheEngineExtension.php
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DiffusionCacheEngineExtension.php
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			<?php

			final class DiffusionCacheEngineExtension
			extends PhabricatorCacheEngineExtension {

			const EXTENSIONKEY = 'diffusion';

			public function getExtensionName() {
			return pht('Diffusion Repositories');
			}

			public function discoverLinkedObjects(
			PhabricatorCacheEngine $engine,
			array $objects) {
			$viewer = $engine->getViewer();
			$results = array();

			// When an Almanac Service changes, update linked repositories.

			$services = $this->selectObjects($objects, 'AlmanacService');
			if ($services) {
			$repositories = id(new PhabricatorRepositoryQuery())
			->setViewer($viewer)
			->withAlmanacServicePHIDs(mpull($services, 'getPHID'))
			->execute();
			foreach ($repositories as $repository) {
			$results[] = $repository;
			}
			}

			return $results;
			}

			public function deleteCaches(
			PhabricatorCacheEngine $engine,
			array $objects) {

			$keys = array();
			$repositories = $this->selectObjects($objects, 'PhabricatorRepository');
			foreach ($repositories as $repository) {
			$keys[] = $repository->getAlmanacServiceCacheKey();
			}

			$keys = array_filter($keys);

			if ($keys) {
			$cache = PhabricatorCaches::getMutableStructureCache();
			$cache->deleteKeys($keys);
			}
			}

			}