How to send batch request with Google Indexing API - php

Question

I'm following Google indexing API
And I want to send batch request with Google_Service_Indexing.
In PHP, please help me. How to do it.
In Google document, this is Google_Service_Books.
I tried with PHP like :
//set google client
$client = new Google_Client();
$client->setAuthConfig('my_key.json');
$client->addScope('https://www.googleapis.com/auth/indexing');
$client->setUseBatch(true);
//set batch
$batch = new Google_Http_Batch($client);
//set service
$service = new Google_Service_Indexing($client);
$postBody = new Google_Service_Indexing_UrlNotification();
$postBody->setType('URL_UPDATED');
$postBody->setUrl('https://my_job_detail');
$service->urlNotifications->publish($postBody);
$batch ->add($service);
$results = $batch->execute();
And I stuck in error :
Argument 1 passed to Google_Http_Batch::add() must implement interface Psr\Http\Message\RequestInterface, instance of Google_Service_Indexing_UrlNotification given, called in /Applications/MAMP/htdocs/Jukukoushi/src/Controller/ToppagesController.php on line 340
Request URL: /

Answer 1

I tried with PHP and completed.
//init google client
$client = new Google_Client();
$client->setAuthConfig('your_path_to_key.json');
$client->addScope('https://www.googleapis.com/auth/indexing');
$client->setUseBatch(true);
//init google batch and set root URL
$batch = new Google_Http_Batch($client,false,'https://indexing.googleapis.com');
//init service Notification to sent request
$postBody = new Google_Service_Indexing_UrlNotification();
$postBody->setType('URL_UPDATED');
$postBody->setUrl('https://your_job_detail');
//init service Indexing ( like updateJobPosting )
$service = new Google_Service_Indexing($client);
//create request
//$service->urlNotifications->createRequestUri('https://indexing.googleapis.com/batch');
$request_kame = $service->urlNotifications->publish($postBody);
//add request to batch
$batch ->add($request_kame);