mail-log: Add mail_log_cached_only setting.

If enabled, everything except "save" event will log only the fields that can
be looked up from cache. This improves performance if some of the fields
aren't cached and it's not a strict requirement to log them.

diff --git a/src/plugins/mail-log/mail-log-plugin.c b/src/plugins/mail-log/mail-log-plugin.c
index 4bc9427efcc01d2b6dac299a91462f564b246dc0..bc4e87a79d3ef7230c298cecbad84dd447f5f6d2 100644 (file)
--- a/src/plugins/mail-log/mail-log-plugin.c
+++ b/src/plugins/mail-log/mail-log-plugin.c
@@ -78,6 +78,7 @@ struct mail_log_user {
 
        enum mail_log_field fields;
        enum mail_log_event events;
+       bool cached_only;
 };
 
 struct mail_log_message {
@@ -165,6 +166,9 @@ static void mail_log_mail_user_created(struct mail_user *user)
        str = mail_user_plugin_getenv(user, "mail_log_events");
        muser->events = str == NULL ? MAIL_LOG_DEFAULT_EVENTS :
                mail_log_parse_events(str);
+
+       muser->cached_only =
+               mail_user_plugin_getenv_bool(user, "mail_log_cached_only");
 }
 
 static void mail_log_append_mailbox_name(string_t *str, struct mail *mail)
@@ -333,7 +337,12 @@ mail_log_append_mail_message(struct mail_log_mail_txn_context *ctx,
        }
 
        T_BEGIN {
+               enum mail_lookup_abort orig_lookup_abort = mail->lookup_abort;
+
+               if (event != MAIL_LOG_EVENT_SAVE && muser->cached_only)
+                       mail->lookup_abort = MAIL_LOOKUP_ABORT_NOT_IN_CACHE;
                mail_log_append_mail_message_real(ctx, mail, event, desc);
+               mail->lookup_abort = orig_lookup_abort;
        } T_END;
 }