[3696] It is allowed to not specify lease database configuration.

In such case, the server will use a default configuration - memfile
lease database backend.

1 files changed, 64 insertions, 0 deletions

diff --git a/src/lib/dhcpsrv/cfg_db_access.cc b/src/lib/dhcpsrv/cfg_db_access.cc
new file mode 100644
index 0000000000..571ae18ff0
--- /dev/null
+++ b/src/lib/dhcpsrv/cfg_db_access.cc
@@ -0,0 +1,64 @@
+// Copyright (C) 2016 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+#include <dhcpsrv/cfg_db_access.h>
+#include <dhcpsrv/host_data_source_factory.h>
+#include <dhcpsrv/lease_mgr_factory.h>
+#include <sstream>
+
+namespace isc {
+namespace dhcp {
+
+CfgDbAccess::CfgDbAccess()
+    : appended_parameters_(), lease_db_access_("type=memfile"),
+      host_db_access_() {
+}
+
+std::string
+CfgDbAccess::getLeaseDbAccessString() const {
+    return (getAccessString(lease_db_access_));
+}
+
+
+std::string
+CfgDbAccess::getHostDbAccessString() const {
+    return (getAccessString(host_db_access_));
+}
+
+
+void
+CfgDbAccess::createManagers() const {
+    // Recreate lease manager.
+    LeaseMgrFactory::destroy();
+    LeaseMgrFactory::create(getLeaseDbAccessString());
+
+    // Recreate host data source.
+    HostDataSourceFactory::destroy();
+    if (!host_db_access_.empty()) {
+        HostDataSourceFactory::create(getHostDbAccessString());
+    }
+}
+
+std::string 
+CfgDbAccess::getAccessString(const std::string& access_string) const {
+    std::ostringstream s;
+    s << access_string;
+    // Only append additional parameters if any parameters are specified
+    // in a configuration. For host database, no parameters mean that
+    // database access is disabled and thus we don't want to append any
+    // parameters.
+    if ((s.tellp() != std::streampos(0)) && (!appended_parameters_.empty())) {
+        s << " " << appended_parameters_;
+    }
+
+    return (s.str());
+}
+
+
+
+} // end of isc::dhcp namespace
+} // end of isc namespace