Provides Slick Session to plug-ins via ThreadLocal

src/main/scala/plugin/Sessions.scala

@@ -0,0 +1,11 @@
+package plugin
+
+import slick.jdbc.JdbcBackend.Session
+
+/**
+ * Provides Slick Session to Plug-ins.
+ */
+object Sessions {
+  val sessions = new ThreadLocal[Session]
+  implicit def session: Session = sessions.get()
+}

src/main/scala/servlet/PluginActionFilter.scala

@@ -10,6 +10,7 @@ import service.SystemSettingsService
 import util.Keys
 import app.Context
 import plugin.Results._
+import plugin.Sessions._
 
 class PluginActionFilter extends Filter with SystemSettingsService {
 
@@ -27,7 +28,8 @@ class PluginActionFilter extends Filter with SystemSettingsService {
         // Create Context
         val loginAccount = req.getSession.getAttribute(Keys.Session.LoginAccount).asInstanceOf[Account]
         implicit val context = Context(loadSystemSettings(), Option(loginAccount), req)
-
+        sessions.set(Database.getSession(req))
+        try {
           // Invoke global action
           action(req, res, context) match {
             // TODO to be type classes?
@@ -46,6 +48,9 @@ class PluginActionFilter extends Filter with SystemSettingsService {
               res.getWriter.write(x.body)
               res.getWriter.flush()
           }
+        } finally {
+          sessions.remove()
+        }
       }.getOrElse {
         chain.doFilter(req, res)
       }