BatchExampleForm.php in Examples for Developers 3.x
Namespace
Drupal\batch_example\FormFile
modules/batch_example/src/Form/BatchExampleForm.phpView source
<?php
namespace Drupal\batch_example\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
/**
* Form with examples on how to use cache.
*/
class BatchExampleForm extends FormBase {
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'batch_example_form';
}
/**
* {@inheritdoc}
*/
public function buildForm(array $form, FormStateInterface $form_state) {
$form['description'] = [
'#type' => 'markup',
'#markup' => $this
->t('This example offers two different batches. The first does 1000 identical operations, each completed in on run; the second does 20 operations, but each takes more than one run to operate if there are more than 5 nodes.'),
];
$form['batch'] = [
'#type' => 'select',
'#title' => 'Choose batch',
'#options' => [
'batch_1' => $this
->t('batch 1 - 1000 operations'),
'batch_2' => $this
->t('batch 2 - 20 operations.'),
],
];
$form['submit'] = [
'#type' => 'submit',
'#value' => 'Go',
];
return $form;
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
// Gather our form value.
$value = $form_state
->getValues()['batch'];
// Set the batch, using convenience methods.
$batch = [];
switch ($value) {
case 'batch_1':
$batch = $this
->generateBatch1();
break;
case 'batch_2':
$batch = $this
->generateBatch2();
break;
}
batch_set($batch);
}
/**
* Generate Batch 1.
*
* Batch 1 will process one item at a time.
*
* This creates an operations array defining what batch 1 should do, including
* what it should do when it's finished. In this case, each operation is the
* same and by chance even has the same $nid to operate on, but we could have
* a mix of different types of operations in the operations array.
*/
public function generateBatch1() {
$num_operations = 1000;
$this
->messenger()
->addMessage($this
->t('Creating an array of @num operations', [
'@num' => $num_operations,
]));
$operations = [];
// Set up an operations array with 1000 elements, each doing function
// batch_example_op_1.
// Each operation in the operations array means at least one new HTTP
// request, running Drupal from scratch to accomplish the operation. If the
// operation returns with $context['finished'] != TRUE, then it will be
// called again.
// In this example, $context['finished'] is always TRUE.
for ($i = 0; $i < $num_operations; $i++) {
// Each operation is an array consisting of
// - The function to call.
// - An array of arguments to that function.
$operations[] = [
'batch_example_op_1',
[
$i + 1,
$this
->t('(Operation @operation)', [
'@operation' => $i,
]),
],
];
}
$batch = [
'title' => $this
->t('Creating an array of @num operations', [
'@num' => $num_operations,
]),
'operations' => $operations,
'finished' => 'batch_example_finished',
];
return $batch;
}
/**
* Generate Batch 2.
*
* Batch 2 will process five items at a time.
*
* This creates an operations array defining what batch 2 should do, including
* what it should do when it's finished. In this case, each operation is the
* same and by chance even has the same $nid to operate on, but we could have
* a mix of different types of operations in the operations array.
*/
public function generateBatch2() {
$num_operations = 20;
$operations = [];
// 20 operations, each one loads all nodes.
for ($i = 0; $i < $num_operations; $i++) {
$operations[] = [
'batch_example_op_2',
[
$this
->t('(Operation @operation)', [
'@operation' => $i,
]),
],
];
}
$batch = [
'operations' => $operations,
'finished' => 'batch_example_finished',
// @current, @remaining, @total, @percentage, @estimate and @elapsed.
// These placeholders are replaced with actual values in _batch_process(),
// using strtr() instead of t(). The values are determined based on the
// number of operations in the 'operations' array (above), NOT by the
// number of nodes that will be processed. In this example, there are 20
// operations, so @total will always be 20, even though there are multiple
// nodes per operation.
// Defaults to t('Completed @current of @total.').
'title' => $this
->t('Processing batch 2'),
'init_message' => $this
->t('Batch 2 is starting.'),
'progress_message' => $this
->t('Processed @current out of @total.'),
'error_message' => $this
->t('Batch 2 has encountered an error.'),
];
return $batch;
}
}
Classes
Name | Description |
---|---|
BatchExampleForm | Form with examples on how to use cache. |