uses syslog handler on appengine (#1025)

* uses syslog handler on appengine

Author: bshaffer

src/Google/Client.php

@@ -31,6 +31,7 @@
 use Psr\Log\LoggerInterface;
 use Monolog\Logger;
 use Monolog\Handler\StreamHandler as MonologStreamHandler;
+use Monolog\Handler\SyslogHandler as MonologSyslogHandler;
 
 /**
  * The Google API Client
@@ -990,7 +991,12 @@ public function getLogger()
   protected function createDefaultLogger()
   {
     $logger = new Logger('google-api-php-client');
-    $logger->pushHandler(new MonologStreamHandler('php://stderr', Logger::NOTICE));
+    if ($this->isAppEngine()) {
+      $handler = new MonologSyslogHandler('app', LOG_USER, Logger::NOTICE);
+    } else {
+      $handler = new MonologStreamHandler('php://stderr', Logger::NOTICE);
+    }
+    $logger->pushHandler($handler);
 
     return $logger;
   }

tests/Google/ClientTest.php

@@ -243,6 +243,27 @@ public function testPrepareService()
     $this->assertInstanceOf('Google_Model', $dr_service->files->listFiles());
   }
 
+  public function testDefaultLogger()
+  {
+    $client = new Google_Client();
+    $logger = $client->getLogger();
+    $this->assertInstanceOf('Monolog\Logger', $logger);
+    $handler = $logger->popHandler();
+    $this->assertInstanceOf('Monolog\Handler\StreamHandler', $handler);
+  }
+
+  public function testDefaultLoggerAppEngine()
+  {
+    $_SERVER['SERVER_SOFTWARE'] = 'Google App Engine';
+    $client = new Google_Client();
+    $logger = $client->getLogger();
+    $handler = $logger->popHandler();
+    unset($_SERVER['SERVER_SOFTWARE']);
+
+    $this->assertInstanceOf('Monolog\Logger', $logger);
+    $this->assertInstanceOf('Monolog\Handler\SyslogHandler', $handler);
+  }
+
   public function testSettersGetters()
   {
     $client = new Google_Client();