From 9845a372968046da2f1e99a37ca550ce8f38fb31 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Hannu=20Niemist=C3=B6?= <hannu.niemisto@semantum.fi>
Date: Fri, 2 Nov 2018 16:13:48 +0200
Subject: [PATCH] Added support for creating markers and changing MDC in SCL
 logging

gitlab #178

Change-Id: Id2996c969d3812a6ff9c20fca88307d629be7354
---
 .../org.simantics.scl.runtime/scl/Logging.scl |  6 ++++++
 .../scl/LoggingMDC.scl                        | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 bundles/org.simantics.scl.runtime/scl/LoggingMDC.scl

diff --git a/bundles/org.simantics.scl.runtime/scl/Logging.scl b/bundles/org.simantics.scl.runtime/scl/Logging.scl
index a781fa01f..67f48ecd2 100644
--- a/bundles/org.simantics.scl.runtime/scl/Logging.scl
+++ b/bundles/org.simantics.scl.runtime/scl/Logging.scl
@@ -1 +1,7 @@
 include "LoggingJava"
+include "LoggingMDC" as MDC
+
+importJava "org.slf4j.MarkerFactory" where
+    // Note: this method is pure by purpose, because MarkerFactory should always return the same marker
+    @JavaName getMarker
+    marker :: String -> Marker
\ No newline at end of file
diff --git a/bundles/org.simantics.scl.runtime/scl/LoggingMDC.scl b/bundles/org.simantics.scl.runtime/scl/LoggingMDC.scl
new file mode 100644
index 000000000..a8babda35
--- /dev/null
+++ b/bundles/org.simantics.scl.runtime/scl/LoggingMDC.scl
@@ -0,0 +1,19 @@
+include "LoggingJava"
+
+importJava "org.slf4j.MDC" where
+    get    :: String -> <Proc> Maybe String
+    put    :: String -> String -> <Proc> ()
+    remove :: String -> <Proc> ()
+
+putOrRemove :: String -> Maybe String -> <Proc> ()
+putOrRemove key (Just value) = put key value
+putOrRemove key Nothing      = remove key
+
+@inline
+withContext :: String -> String -> (<e> a) -> <e,Proc> a
+withContext key value procedure = result
+  where
+    oldValue = get key
+    put key value
+    result = procedure
+    putOrRemove key oldValue
\ No newline at end of file
-- 
2.47.1