[trac1061] Interface of the database connection and client

It will look something like this, hopefully. Let's see if it works.

src/lib/datasrc/Makefile.am

@@ -22,6 +22,7 @@ libdatasrc_la_SOURCES += zone.h
 libdatasrc_la_SOURCES += result.h
 libdatasrc_la_SOURCES += logger.h logger.cc
 libdatasrc_la_SOURCES += client.h
+libdatasrc_la_SOURCES += database.h database.cc
 nodist_libdatasrc_la_SOURCES = datasrc_messages.h datasrc_messages.cc
 
 libdatasrc_la_LIBADD = $(top_builddir)/src/lib/exceptions/libexceptions.la

src/lib/datasrc/client.h

@@ -15,6 +15,8 @@
 #ifndef __DATA_SOURCE_CLIENT_H
 #define __DATA_SOURCE_CLIENT_H 1
 
+#include <boost/noncopyable.hpp>
+
 #include <datasrc/zone.h>
 
 namespace isc {

src/lib/datasrc/database.cc

@@ -0,0 +1,21 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include <datasrc/database.h>
+
+namespace isc {
+namespace datasrc {
+
+}
+}

src/lib/datasrc/database.h

@@ -0,0 +1,40 @@
+// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef __DATABASE_DATASRC_H
+#define __DATABASE_DATASRC_H
+
+#include <datasrc/client.h>
+
+namespace isc {
+namespace datasrc {
+
+class DatabaseConnection : boost::noncopyable {
+public:
+    ~ DatabaseConnection() { }
+    virtual std::pair<bool, int> getZone() const;
+};
+
+class DatabaseClient : public DataSourceClient {
+public:
+    DatabaseClient(const std::auto_ptr<DatabaseConnection>& connection);
+    virtual FindResult findZone(const isc::dns::Name& name) const;
+private:
+    const std::auto_ptr<DatabaseConnection> connection_;
+};
+
+}
+}
+
+#endif