Merge pull request #6 from mhh1422/master

Add TTL to mapping and document

Author: mhh1422

README.md

@@ -23,7 +23,8 @@ An elastic-search based session driver for Laravel 5.1
     "elastic" => [
         "url" => "http://localhost:9200/",
         "index" => "laravel-es-sessions",
-        "type" => "session"
+        "type" => "session",
+        'ttl' => '15m' //check https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-ttl-field.html#_default_ttl
     ],
     ```
     Values shown above are the default values in case you did not configure.
@@ -42,6 +43,10 @@ You can do so manually by applying this mapping to the index and type:
             "created":{"type":"date"},
             "updated":{"type":"date"},
             "data":{"type":"string","index":"no"}
+        },
+        "_ttl":{
+            "enabled":true,
+            "default":"15m"
         }
     }
 }

src/ElasticSessionStore.php

@@ -44,7 +44,8 @@ public static function putMapping() {
                     'created' => ['type' => 'date'],
                     'updated' => ['type' => 'date'],
                     'data' => ['type' => 'string', 'index' => 'no'],
-                ]
+                ],
+                '_ttl' => (@$config['ttl'] ? ['enabled' => true, 'default' => @$config['ttl']? : '15m'] : ['enabled' => false])
             ]
         ];
         $client->indices()->putMapping($mappingParams);
@@ -74,7 +75,7 @@ public function read($sessionId) {
     public function write($sessionId, $sessionData) {
         $updatedTs = Carbon::now()->toIso8601String();
         $createdTs = array_key_exists($sessionId, $this->_cache) ? $this->_cache[$sessionId]->created : $updatedTs;
-        static::create(['data' => $sessionData, 'created' => $createdTs, 'updated' => $updatedTs], $sessionId, ["api" => "index"]);
+        static::create(['data' => $sessionData, 'created' => $createdTs, 'updated' => $updatedTs, '_ttl' => config('session.elastic.ttl', '15m')], $sessionId, ["api" => "index"]);
     }
 
     public function destroy($sessionId) {