ezcWorkflowExecution provides all functionality necessary to execute
a workflow. However, it does not provide functionality to make the
execution of a workflow persistent and hence usuable over more than
one PHP run.
Implementations must implement the do* methods and provide the means
to store the execution data to a persistent medium.
public function execute(ezcWorkflowExecution $execution)
{
$qa_results_dir = "/var/qa";
// value will be the latest score of the package
$value = $execution->getVariable('distilled_review');
// an integer
// dump this value to a file in the filesystem
$storage = new midgard_query_storage('com_meego_package_details');
// get the detailed package object
$q = new midgard_query_select($storage);
$q->set_constraint(new midgard_query_constraint(new midgard_query_property('packageguid'), '=', new midgard_query_value($execution->getVariable('package_instance'))));
$q->execute();
$package = $q->list_objects();
if (count($package) && $value) {
$project_name = $package[0]->repoprojectname;
$package_name = $package[0]->packageparent;
$qa_results_dir = $qa_results_dir . '/' . $project_name;
if (!is_dir($qa_results_dir)) {
$ret = mkdir($qa_results_dir, 0755, true);
if (!$ret) {
// do something
return;
}
}
$handle = fopen($qa_results_dir . '/' . $package_name . '.txt', "wb");
if ($handle) {
$ret = fwrite($handle, $value);
if (!$ret) {
// do something
}
}
fclose($handle);
}
return;
}
/**
* Executes this node and returns true.
*
* Expects the configuration parameters 'name' the name of the workflow
* variable to work on and the parameter 'value' the value to operate with
* or the name of the workflow variable containing the value.
*
* @param ezcWorkflowExecution $execution
* @return boolean
* @ignore
*/
public function execute(ezcWorkflowExecution $execution)
{
if (is_array($this->configuration)) {
$variableName = $this->configuration['name'];
} else {
$variableName = $this->configuration;
}
$this->variable = $execution->getVariable($variableName);
if (!is_numeric($this->variable)) {
throw new ezcWorkflowExecutionException(sprintf('Variable "%s" is not a number.', $variableName));
}
if (is_numeric($this->configuration['operand'])) {
$this->operand = $this->configuration['operand'];
} else {
if (is_string($this->configuration['operand'])) {
try {
$operand = $execution->getVariable($this->configuration['operand']);
if (is_numeric($operand)) {
$this->operand = $operand;
}
} catch (ezcWorkflowExecutionException $e) {
}
}
}
if ($this->operand === null) {
throw new ezcWorkflowExecutionException('Illegal operand.');
}
$this->doExecute();
$execution->setVariable($variableName, $this->variable);
$this->activateNode($execution, $this->outNodes[0]);
return parent::execute($execution);
}
/**
* Activate this node.
*
* @param ezcWorkflowExecution $execution
* @param ezcWorkflowNode $activatedFrom
* @param int $threadId
* @ignore
*/
public function activate(ezcWorkflowExecution $execution, ezcWorkflowNode $activatedFrom = null, $threadId = 0)
{
$parentThreadId = $execution->getParentThreadId($threadId);
if (empty($this->state['threads'])) {
$this->state['threads'][] = $threadId;
parent::activate($execution, $activatedFrom, $parentThreadId);
}
}
/**
* Executes this by setting all the variables specified by the
* configuration.
*
* @param ezcWorkflowExecution $execution
* @return boolean true when the node finished execution,
* and false otherwise
* @ignore
*/
public function execute(ezcWorkflowExecution $execution)
{
foreach ($this->configuration as $variable => $value) {
$execution->setVariable($variable, $value);
}
$this->activateNode($execution, $this->outNodes[0]);
return parent::execute($execution);
}
/**
* Performs the merge by ending the incoming threads and
* activating the outgoing node.
*
* @param ezcWorkflowExecution $execution
* @return boolean true when the node finished execution,
* and false otherwise
*/
protected function doMerge(ezcWorkflowExecution $execution)
{
foreach ($this->state['threads'] as $threadId) {
$execution->endThread($threadId);
}
$this->activateNode($execution, $this->outNodes[0]);
$this->initState();
return parent::execute($execution);
}
public function execute(ezcWorkflowExecution $execution)
{
$package_instance = new com_meego_package($execution->getVariable('package_instance'));
// We load the form from the package's repository
$repository = new com_meego_repository($package_instance->repository);
$list_of_forms = midgardmvc_ui_forms_generator::list_for_object($repository);
if (empty($list_of_forms)) {
return;
}
$execution->setVariable('review_form', $list_of_forms[0]->name);
}
/**
* Property write access.
*
* @param string $propertyName Name of the property.
* @param mixed $val The value for the property.
*
* @throws ezcBaseValueException
* If a the value for the property definitionStorage is not an
* instance of ezcWorkflowDefinitionStorage.
* @throws ezcBaseValueException
* If a the value for the property workflow is not an instance of
* ezcWorkflow.
* @ignore
*/
public function __set($propertyName, $val)
{
if ($val instanceof ezcWorkflow && ($val->isInteractive() || $val->hasSubWorkflows())) {
throw new ezcWorkflowExecutionException('This executer can only execute workflows that have no Input and SubWorkflow nodes.');
}
return parent::__set($propertyName, $val);
}
/**
* @todo: docs
*/
public function execute(ezcWorkflowExecution $execution)
{
$form = midgardmvc_ui_forms_generator::get_by_guid($execution->getVariable('review_form'));
$instance = new midgardmvc_ui_forms_form_instance($execution->getVariable('review'));
$review = midgardmvc_ui_forms_store::load_form($form, $instance);
$items = $form->items;
$boolean_count = 0;
$positive = 0;
$package = new com_meego_package($instance->relatedobject);
foreach ($items as $key => $item) {
if ($key == "redirect_link" || $key == "execution") {
continue;
}
try {
$field = new midgardmvc_ui_forms_form_field($key);
} catch (Exception $e) {
midgardmvc_core::get_instance()->log('Invalid field detected in distill review: ' . $key . ', value: ' . $item, 'warning');
}
// todo: ugly hardcoded check, but what can we do..
if ($field->title == "Should the application be in this application catalog?") {
// if the answer belongs to a certain field then we process
// this field must be a boolean too
if ($item instanceof midgardmvc_helper_forms_field_boolean) {
if ($item->get_value()) {
// add +1 to the package score
$package->metadata->score++;
} else {
// oh yes, we do give -1 points too ;)
$package->metadata->score--;
}
$res = $package->update();
if (!$res) {
//update failed; do what?
}
}
} else {
// otherwise
continue;
}
}
// pass on the score
$execution->setVariable('distilled_review', $package->metadata->score);
}
/**
* Visualizes the current state of the workflow execution.
*
* @param ezcWorkflowExecution $execution
*/
protected function visualize(ezcWorkflowExecution $execution)
{
$activatedNodes = array();
foreach ($execution->getActivatedNodes() as $node) {
$activatedNodes[] = $node->getId();
}
if ($this->options['includeVariables']) {
$variables = $execution->getVariables();
} else {
$variables = array();
}
$visitor = new ezcWorkflowVisitorVisualization();
$visitor->options['highlightedNodes'] = $activatedNodes;
$visitor->options['workflowVariables'] = $variables;
$execution->workflow->accept($visitor);
file_put_contents(sprintf('%s%s%s_%03d_%03d.dot', $this->options['directory'], DIRECTORY_SEPARATOR, $execution->workflow->name, $execution->getId(), ++$this->fileCounter), $visitor);
}
/**
* Passes variables from one execution context to another.
*
* @param ezcWorkflowExecution $from The execution context the variables are passed from.
* @param ezcWorkflowExecution $to The execution context the variables are passed to.
* @param array $variables The names of the variables.
* @throws ezcWorkflowExecutionException if a variable that is to be passed does not exist.
* @ignore
*/
protected function passVariables(ezcWorkflowExecution $from, ezcWorkflowExecution $to, array $variables)
{
foreach ($variables as $fromName => $toName) {
$to->setVariable($toName, $from->getVariable($fromName));
}
}
/**
* Executes this node.
*
* @param ezcWorkflowExecution $execution
* @return boolean true when the node finished execution,
* and false otherwise
* @ignore
*/
public function execute(ezcWorkflowExecution $execution)
{
$variables = $execution->getVariables();
$canExecute = true;
$errors = array();
foreach ($this->configuration as $variable => $condition) {
if (!isset($variables[$variable])) {
$execution->addWaitingFor($this, $variable, $condition);
$canExecute = false;
} else {
if (!$condition->evaluate($variables[$variable])) {
$errors[$variable] = (string) $condition;
}
}
}
if (!empty($errors)) {
throw new ezcWorkflowInvalidInputException($errors);
}
if ($canExecute) {
$this->activateNode($execution, $this->outNodes[0]);
return parent::execute($execution);
} else {
return false;
}
}
/**
* Ends the execution of this workflow.
*
* @param ezcWorkflowExecution $execution
* @return boolean true when the node finished execution,
* and false otherwise
* @ignore
*/
public function execute(ezcWorkflowExecution $execution)
{
$execution->end($this);
return parent::execute($execution);
}
/**
* Property set access.
*
* @param string $propertyName
* @param string $propertyValue
* @throws ezcBasePropertyNotFoundException
* If the given property could not be found.
* @throws ezcBaseValueException
* If the value for the property options is not an ezcWorkflowDatabaseOptions object.
* @ignore
*/
public function __set($propertyName, $propertyValue)
{
switch ($propertyName) {
case 'definitionStorage':
case 'workflow':
return parent::__set($propertyName, $propertyValue);
case 'options':
if (!$propertyValue instanceof ezcWorkflowDatabaseOptions) {
throw new ezcBaseValueException($propertyName, $propertyValue, 'ezcWorkflowDatabaseOptions');
}
break;
default:
throw new ezcBasePropertyNotFoundException($propertyName);
}
$this->properties[$propertyName] = $propertyValue;
}
/**
* Called after a variable has been unset.
*
* @param ezcWorkflowExecution $execution
* @param string $variableName
*/
public function afterVariableUnset(ezcWorkflowExecution $execution, $variableName)
{
$this->notifyListeners(sprintf('Unset variable "%s" for execution #%d of workflow "%s" (version %d).', $variableName, $execution->getId(), $execution->workflow->name, $execution->workflow->version), ezcWorkflowExecutionListener::DEBUG);
}
/**
* Evaluates all the conditions, checks the constraints and activates any nodes that have
* passed through both checks and condition evaluation.
*
* @param ezcWorkflowExecution $execution
* @return boolean true when the node finished execution,
* and false otherwise
* @ignore
*/
public function execute(ezcWorkflowExecution $execution)
{
$keys = array_keys($this->outNodes);
$numKeys = count($keys);
$nodesToStart = array();
$numActivatedConditionalOutNodes = 0;
if ($this->maxActivatedConditionalOutNodes !== false) {
$maxActivatedConditionalOutNodes = $this->maxActivatedConditionalOutNodes;
} else {
$maxActivatedConditionalOutNodes = $numKeys;
}
for ($i = 0; $i < $numKeys && $numActivatedConditionalOutNodes <= $maxActivatedConditionalOutNodes; $i++) {
if (isset($this->configuration['condition'][$keys[$i]])) {
// Conditional outgoing node.
if ($this->configuration['condition'][$keys[$i]]->evaluate($execution->getVariables())) {
$nodesToStart[] = $this->outNodes[$keys[$i]];
$numActivatedConditionalOutNodes++;
}
} else {
// Unconditional outgoing node.
$nodesToStart[] = $this->outNodes[$keys[$i]];
}
}
if ($this->minActivatedConditionalOutNodes !== false && $numActivatedConditionalOutNodes < $this->minActivatedConditionalOutNodes) {
throw new ezcWorkflowExecutionException('Node activates less conditional outgoing nodes than required.');
}
return $this->activateOutgoingNodes($execution, $nodesToStart);
}
/**
* Activate this node in the execution environment $execution.
*
* $activatedFrom is the node that activated this node and $threadId is
* threadId of the thread the node should be activated in.
*
* This method is called by other nodes and/or the execution environment
* depending on the workflow.
*
* @param ezcWorkflowExecution $execution
* @param ezcWorkflowNode $activatedFrom
* @param int $threadId
* @ignore
*/
public function activate(ezcWorkflowExecution $execution, ezcWorkflowNode $activatedFrom = null, $threadId = 0)
{
if ($this->activationState === self::WAITING_FOR_ACTIVATION) {
$this->activationState = self::WAITING_FOR_EXECUTION;
$this->setThreadId($threadId);
if ($activatedFrom !== null) {
$this->activatedFrom[] = get_class($activatedFrom);
}
$execution->activate($this);
}
}
/**
* Cancels the execution of this workflow.
*
* @param ezcWorkflowExecution $execution
* @param ezcWorkflowNode $activatedFrom
* @param int $threadId
* @ignore
*/
public function activate(ezcWorkflowExecution $execution, ezcWorkflowNode $activatedFrom = null, $threadId = 0)
{
$execution->cancel($this);
}
/**
* Gets a rendered HTML form
*/
public function get_form(ezcWorkflowExecution $execution)
{
$list_of_variables = $execution->getVariables();
if (array_key_exists('review_form', $list_of_variables)) {
$db_form = new midgardmvc_ui_forms_form($list_of_variables['review_form']);
$form = midgardmvc_ui_forms_generator::get_by_form($db_form, false);
$form->set_readonly(false);
if ($this->request->isset_data_item('redirect_link')) {
$redirect_link = $this->request->get_data_item('redirect_link');
} else {
if (array_key_exists('HTTP_REFERER', $_SERVER)) {
$redirect_link = $_SERVER['HTTP_REFERER'];
} else {
$redirect_link = '';
}
}
$form->set_cancel(null, $this->mvc->i18n->get('cancel', 'midgardmvc_helper_forms'), $redirect_link);
// add a hidden input with the recirect link
// where we go upon successful submit
$field = $form->add_field('redirect_link', 'text');
$field->set_value($redirect_link);
$widget = $field->set_widget('hidden');
// add a hidden input with the execution guid
$field = $form->add_field('execution', 'text');
$field->set_value($execution->guid);
$widget = $field->set_widget('hidden');
return array('db_form' => $db_form, 'form' => $form);
}
return null;
}
