Add special command to warm up MVEL engine

4 years ago · b65aa4cc8a
1 changed files with 6 additions and 0 deletions
--- a/common/script/script-api/src/main/java/org/thingsboard/script/api/mvel/DefaultMvelInvokeService.java
+++ b/common/script/script-api/src/main/java/org/thingsboard/script/api/mvel/DefaultMvelInvokeService.java
@ -113,6 +113,12 @@ public class DefaultMvelInvokeService extends AbstractScriptInvokeService implem
        parserConfig.addImport("JSON", TbJson.class);
        TbUtils.register(parserConfig);
        executor = MoreExecutors.listeningDecorator(ThingsBoardExecutors.newWorkStealingPool(threadPoolSize, "mvel-executor"));
+        try {
+            // Special command to warm up MVEL engine
+            MVEL.compileExpression("var warmUp = {}; warmUp", new SandboxedParserContext(parserConfig));
+        } catch (Exception e) {
+            // do nothing
+        }
    }

    @PreDestroy