public function testReplaceLiteralTriple()
{
$graph = new ExtendedGraph();
$graph->add_literal_triple('http://some/subject/s1', 'http://some/predicate', 'some object');
$this->assertTrue($graph->replace_literal_triple('http://some/subject/s1', 'http://some/predicate', 'some object', 'replacement object'), 'Should return true on replacement');
$index = $graph->get_index();
$this->assertEquals('replacement object', $index['http://some/subject/s1']['http://some/predicate'][0]['value'], "should be 'replacement object'");
}
/**
* Create and apply a changeset which is the delta between $oldGraph and $newGraph
* @param \Tripod\ExtendedGraph $oldGraph
* @param \Tripod\ExtendedGraph $newGraph
* @param string|null $context
* @param string|null $description
* @throws \Exception
* @return bool
*/
public function saveChanges(\Tripod\ExtendedGraph $oldGraph, \Tripod\ExtendedGraph $newGraph, $context = null, $description = null)
{
$this->applyHooks($this::HOOK_FN_PRE, $this->saveChangesHooks, array("pod" => $this->getPodName(), "oldGraph" => $oldGraph, "newGraph" => $newGraph, "context" => $context));
$this->setReadPreferenceToPrimary();
try {
$contextAlias = $this->getContextAlias($context);
if (!Config::getInstance()->isPodWithinStore($this->getStoreName(), $this->getPodName())) {
throw new \Tripod\Exceptions\Exception("database:collection " . $this->getStoreName() . ":" . $this->getPodName() . " is not referenced within config, so cannot be written to");
}
$this->validateGraphCardinality($newGraph);
$oldIndex = $oldGraph->get_index();
$newIndex = $newGraph->get_index();
$args = array('before' => $oldIndex, 'after' => $newIndex, 'changeReason' => $description);
$cs = new \Tripod\ChangeSet($args);
$subjectsAndPredicatesOfChange = array();
$transaction_id = null;
if ($cs->has_changes()) {
// store the actual CBDs
$result = $this->storeChanges($cs, $contextAlias);
if (!isset($result['subjectsAndPredicatesOfChange']) || !isset($result['transaction_id'])) {
$this->errorLog("Result of storeChanges malformed, should have transaction_id and subjectsAndPredicatesOfChange array keys", array("result" => $result));
throw new Exception("Result of storeChanges malformed, should have transaction_id and subjectsAndPredicatesOfChange array keys");
}
extract($result);
// will unpack into $subjectsAndPredicatesOfChange
// Process any syncronous operations
$this->processSyncOperations($subjectsAndPredicatesOfChange, $contextAlias);
// Schedule calculation of any async activity
$this->queueAsyncOperations($subjectsAndPredicatesOfChange, $contextAlias);
}
$this->applyHooks($this::HOOK_FN_SUCCESS, $this->saveChangesHooks, array("pod" => $this->getPodName(), "oldGraph" => $oldGraph, "newGraph" => $newGraph, "context" => $context, "changeSet" => $cs, "subjectsAndPredicatesOfChange" => $subjectsAndPredicatesOfChange, "transaction_id" => $transaction_id));
} catch (\Exception $e) {
// ensure we reset the original read preference in the event of an exception
$this->resetOriginalReadPreference();
$this->applyHooks($this::HOOK_FN_FAILURE, $this->saveChangesHooks, array("pod" => $this->getPodName(), "oldGraph" => $oldGraph, "newGraph" => $newGraph, "context" => $context));
throw $e;
}
$this->resetOriginalReadPreference();
return true;
}
