[elasticsearch] Add timeout to API calls

Summary:
Default of 300 seconds is more than likely too much in most cases.
Provide the option to override.

Test Plan:
Blocked ElasticSearch with iptables
Set timeout to 5 seconds and make sure we error early

Reviewers: epriestley, vrana

Reviewed By: vrana

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D2678

src/applications/search/engine/PhabricatorSearchEngineElastic.php

@@ -18,11 +18,21 @@
 
 final class PhabricatorSearchEngineElastic extends PhabricatorSearchEngine {
   private $uri;
+  private $timeout;
 
   public function __construct($uri) {
     $this->uri = $uri;
   }
 
+  public function setTimeout($timeout) {
+    $this->timeout = $timeout;
+    return $this;
+  }
+
+  public function getTimeout() {
+    return $this->timeout;
+  }
+
   public function reindexAbstractDocument(
     PhabricatorSearchAbstractDocument $doc) {
 
@@ -206,6 +216,10 @@ final class PhabricatorSearchEngineElastic extends PhabricatorSearchEngine {
       $future->setMethod('GET');
     }
 
+    if ($this->getTimeout()) {
+      $future->setTimeout($this->getTimeout());
+    }
+
     list($body) = $future->resolvex();
 
     if ($is_write) {