SERVER-18070 Split ConnectionString out into its own library

1 files changed, 111 insertions, 0 deletions

diff --git a/src/mongo/client/connection_string_connect.cpp b/src/mongo/client/connection_string_connect.cpp
new file mode 100644
index 00000000000..303f4ef9fa0
--- /dev/null
+++ b/src/mongo/client/connection_string_connect.cpp
@@ -0,0 +1,111 @@
+/*    Copyright 2009 10gen Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects
+ *    for all of the code used other than as permitted herein. If you modify
+ *    file(s) with this exception, you may extend this exception to your
+ *    version of the file(s), but you are not obligated to do so. If you do not
+ *    wish to do so, delete this exception statement from your version. If you
+ *    delete this exception statement from all source files in the program,
+ *    then also delete it in the license file.
+ */
+
+#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kNetwork
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/client/connection_string.h"
+
+#include <list>
+
+#include "mongo/client/dbclientinterface.h"
+#include "mongo/client/dbclient_rs.h"
+#include "mongo/client/syncclusterconnection.h"
+#include "mongo/util/assert_util.h"
+#include "mongo/util/log.h"
+
+namespace mongo {
+
+    boost::mutex ConnectionString::_connectHookMutex;
+    ConnectionString::ConnectionHook* ConnectionString::_connectHook = NULL;
+
+    DBClientBase* ConnectionString::connect( std::string& errmsg, double socketTimeout ) const {
+
+        switch ( _type ) {
+        case MASTER: {
+            DBClientConnection * c = new DBClientConnection(true);
+            c->setSoTimeout( socketTimeout );
+            LOG(1) << "creating new connection to:" << _servers[0];
+            if ( ! c->connect( _servers[0] , errmsg ) ) {
+                delete c;
+                return 0;
+            }
+            LOG(1) << "connected connection!";
+            return c;
+        }
+
+        case PAIR:
+        case SET: {
+            DBClientReplicaSet * set = new DBClientReplicaSet( _setName , _servers , socketTimeout );
+            if( ! set->connect() ) {
+                delete set;
+                errmsg = "connect failed to replica set ";
+                errmsg += toString();
+                return 0;
+            }
+            return set;
+        }
+
+        case SYNC: {
+            // TODO , don't copy
+            std::list<HostAndPort> l;
+            for ( unsigned i=0; i<_servers.size(); i++ )
+                l.push_back( _servers[i] );
+            SyncClusterConnection* c = new SyncClusterConnection( l, socketTimeout );
+            return c;
+        }
+
+        case CUSTOM: {
+
+            // Lock in case other things are modifying this at the same time
+            boost::lock_guard<boost::mutex> lk( _connectHookMutex );
+
+            // Allow the replacement of connections with other connections - useful for testing.
+
+            uassert( 16335, "custom connection to " + this->toString() +
+                        " specified with no connection hook", _connectHook );
+
+            // Double-checked lock, since this will never be active during normal operation
+            DBClientBase* replacementConn = _connectHook->connect( *this, errmsg, socketTimeout );
+
+            log() << "replacing connection to " << this->toString() << " with "
+                  << ( replacementConn ? replacementConn->getServerAddress() : "(empty)" );
+
+            return replacementConn;
+        }
+
+        case INVALID:
+            throw UserException( 13421 , "trying to connect to invalid ConnectionString" );
+            break;
+        }
+
+        verify( 0 );
+        return 0;
+    }
+
+} // namepspace mongo