store http request in audit log

src/main/resources/db/changelog/010-context.sql

@@ -69,12 +69,36 @@ begin
     if (currentTask is null or currentTask = '') then
         raise exception '[401] currentTask must be defined, please call `defineContext(...)`';
     end if;
-    raise debug 'currentTask: %', currentTask;
     return currentTask;
 end; $$;
 --//
 
 
+-- ============================================================================
+--changeset context-CURRENT-REQUEST:1 endDelimiter:--//
+-- ----------------------------------------------------------------------------
+/*
+    Returns the current http request as set via `defineContext(...)`.
+    Raises exception if not set.
+ */
+create or replace function currentRequest()
+    returns varchar(512)
+    stable leakproof
+    language plpgsql as $$
+declare
+    currentRequest varchar(512);
+begin
+    begin
+        currentRequest := current_setting('hsadminng.currentRequest');
+    exception
+        when others then
+            currentRequest := null;
+    end;
+    return currentRequest;
+end; $$;
+--//
+
+
 -- ============================================================================
 --changeset context-CURRENT-USER:1 endDelimiter:--//
 -- ----------------------------------------------------------------------------

src/main/resources/db/changelog/020-audit-log.sql

@@ -23,11 +23,12 @@ do $$
  */
 create table tx_context
 (
-    txId         bigint primary key not null,
+    txId            bigint primary key not null,
-    txTimestamp  timestamp          not null,
+    txTimestamp     timestamp          not null,
-    currentUser  varchar(63)        not null, -- not the uuid, because users can be deleted
+    currentUser     varchar(63)        not null, -- not the uuid, because users can be deleted
-    assumedRoles varchar            not null, -- not the uuids, because roles can be deleted
+    assumedRoles    varchar            not null, -- not the uuids, because roles can be deleted
-    currentTask  varchar            not null
+    currentTask     varchar(96)        not null,
+    currentRequest  varchar(512)       not null
 );
 
 create index on tx_context using brin (txTimestamp);
@@ -65,7 +66,7 @@ begin
     insert
         into tx_context
         values (txid_current(), now(),
-                currentUser(), assumedRoles(), currentTask())
+                currentUser(), assumedRoles(), currentTask(), currentRequest())
         on conflict do nothing;
 
     case tg_op