From c9f1c12cac64e47f3cce4a4c908a8ea40710766a Mon Sep 17 00:00:00 2001
From: Bart Kiers <bkiers@gmail.com>
Date: Thu, 18 Jan 2018 11:34:06 +0100
Subject: [PATCH] Possible to provide custom executor service

---
 src/main/java/liqp/Template.java | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/main/java/liqp/Template.java b/src/main/java/liqp/Template.java
index 7641b630..d550de32 100644
--- a/src/main/java/liqp/Template.java
+++ b/src/main/java/liqp/Template.java
@@ -254,6 +254,10 @@ public String render(boolean convertValueToMap, String key, Object value, Object
      * @return a string denoting the rendered template.
      */
     public String render(final Map<String, Object> variables) {
+        return render(variables, Executors.newSingleThreadExecutor(), true);
+    }
+
+    public String render(final Map<String, Object> variables, ExecutorService executorService, boolean shutdown) {
 
         if (this.templateSize > this.protectionSettings.maxTemplateSizeBytes) {
             throw new RuntimeException("template exceeds " + this.protectionSettings.maxTemplateSizeBytes + " bytes");
@@ -261,8 +265,6 @@ public String render(final Map<String, Object> variables) {
 
         final LiquidWalker walker = new LiquidWalker(new CommonTreeNodeStream(root), this.tags, this.filters, this.parseSettings.flavor);
 
-        ExecutorService executorService = Executors.newSingleThreadExecutor();
-
         Callable<String> task = new Callable<String>() {
             public String call() throws Exception {
                 try {
@@ -276,8 +278,8 @@ public String call() throws Exception {
             }
         };
 
-        Future<String> future = executorService.submit(task);
         try {
+            Future<String> future = executorService.submit(task);
             return future.get(this.protectionSettings.maxRenderTimeMillis, TimeUnit.MILLISECONDS);
         }
         catch (TimeoutException e) {
@@ -288,7 +290,9 @@ public String call() throws Exception {
             throw new RuntimeException("Oops, something unexpected happened: ", t);
         }
         finally {
-            executorService.shutdown();
+            if (shutdown) {
+                executorService.shutdown();
+            }
         }
     }