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<?php
/*
* Copyright 2013 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
include_once "templates/base.php";
echo pageHeader("Batching Queries");
/************************************************
We're going to use the simple access to the
books API again as an example, but this time we
will batch up two queries into a single call.
************************************************/
require_once realpath(dirname(__FILE__) . '/../src/Google/autoload.php');
/************************************************
We create the client and set the simple API
access key. If you comment out the call to
setDeveloperKey, the request may still succeed
using the anonymous quota.
************************************************/
$client = new Google_Client();
$client->setApplicationName("Client_Library_Examples");
$apiKey = "<YOUR_API_KEY>"; // Change to your API key.
// Warn if the API key isn't changed!
if (strpos($apiKey, "<") !== false) {
echo missingApiKeyWarning();
exit;
} else {
$client->setDeveloperKey($apiKey);
$service = new Google_Service_Books($client);
/************************************************
To actually make the batch call we need to
enable batching on the client - this will apply
globally until we set it to false. This causes
call to the service methods to return the query
rather than immediately executing.
************************************************/
$client->setUseBatch(true);
/************************************************
We then create a batch, and add each query we
want to execute with keys of our choice - these
keys will be reflected in the returned array.
************************************************/
$batch = new Google_Http_Batch($client);
$optParams = array('filter' => 'free-ebooks');
$req1 = $service->volumes->listVolumes('Henry David Thoreau', $optParams);
$batch->add($req1, "thoreau");
$req2 = $service->volumes->listVolumes('George Bernard Shaw', $optParams);
$batch->add($req2, "shaw");
/************************************************
Executing the batch will send all requests off
at once.
************************************************/
$results = $batch->execute();
echo "<h3>Results Of Call 1:</h3>";
foreach ($results['response-thoreau'] as $item) {
echo $item['volumeInfo']['title'], "<br /> \n";
}
echo "<h3>Results Of Call 2:</h3>";
foreach ($results['response-shaw'] as $item) {
echo $item['volumeInfo']['title'], "<br /> \n";
}
}
echo pageFooter(__FILE__);
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