From eb16296f88ce0fdb4a98a08950b58a346a6e2bd9 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 22 Dec 2015 18:56:16 +0200
Subject: Log brep and libs version on web server startup

---
 web/apache/service | 20 +++++++++++++++-----
 web/module         |  9 +++++++++
 2 files changed, 24 insertions(+), 5 deletions(-)

(limited to 'web')

diff --git a/web/apache/service b/web/apache/service
index 32ca98d..9641a6b 100644
--- a/web/apache/service
+++ b/web/apache/service
@@ -84,18 +84,27 @@ namespace web
 
       template <typename M>
       static int
-      config_finalizer (apr_pool_t*, apr_pool_t*, apr_pool_t*, server_rec*)
+      config_finalizer (apr_pool_t*, apr_pool_t*, apr_pool_t*, server_rec* s)
         noexcept
       {
-        instance<M> ()->options_parsed_ = true;
+        auto srv (instance<M> ());
+        bool& parsed (srv->options_parsed_);
+
+        if (!parsed)
+        {
+          log l (s);
+          srv->exemplar_.version (l);
+          parsed = true;
+        }
+
         return OK;
       }
 
       template <typename M>
       static void
-      worker_initializer (apr_pool_t*, server_rec* server) noexcept
+      worker_initializer (apr_pool_t*, server_rec* s) noexcept
       {
-        log l (server);
+        log l (s);
         instance<M> ()->init_worker (l);
       }
 
@@ -125,7 +134,8 @@ namespace web
       add_option (const char* name, optional<std::string> value);
 
       template <typename M>
-      int handle (request& r, log& l) noexcept;
+      int
+      handle (request& r, log& l) noexcept;
 
     private:
       std::string name_;
diff --git a/web/module b/web/module
index 50cc6be..704fa6d 100644
--- a/web/module
+++ b/web/module
@@ -195,6 +195,15 @@ namespace web
     options () = 0;
 
     // During startup the web server calls this function on the module
+    // exemplar to log the module version information. It is up to the web
+    // server whether to call this function once per module implementation
+    // type. Therefore, it is expected that this function will log the same
+    // information for all the module exemplars.
+    //
+    virtual void
+    version (log&) = 0;
+
+    // During startup the web server calls this function on the module
     // exemplar passing a list of configuration options. The place these
     // configuration options come from is implementation-specific (normally
     // a configuration file). The web server guarantees that only options
-- 
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