Add method to mark ulab servers as online or offline

database/mysql/remotelab.sql

@@ -103,6 +103,17 @@ CREATE TABLE `statistics` (
   PRIMARY KEY (`pk`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=latin1;
 
+/*Table structure for table `status` */
+
+DROP TABLE IF EXISTS `status`;
+
+CREATE TABLE `status` (
+  `pk` bigint(20) NOT NULL AUTO_INCREMENT,
+  `hostname` text NOT NULL,
+  `online` tinyint(4) NOT NULL,
+  PRIMARY KEY (`pk`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
 /*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
 /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
 /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;

servers/auth_server_lin/src/auth_conn.cpp

@@ -50,7 +50,7 @@ struct exit_exception {
 */
 AuthSocket::AuthSocket(int sock, int serverID, TQObject *parent, const char *name) :
 	TDEKerberosServerSocket(parent, name), m_criticalSection(0), m_stationID(-1), m_bound(false), m_serviceID(0), m_serverID(serverID), m_terminationStamp(0), m_servActive(false), m_servState(0), m_servClientSocket(NULL), m_servClientTimeout(NULL), m_loopTimer(NULL), m_pollTimer(NULL), m_config(static_cast<AuthServer*>(parent)->m_config), m_database(NULL), m_databaseStationsCursor(NULL),
-	m_databaseServicesCursor(NULL), m_databaseServiceTypesCursor(NULL), m_databasePermissionsCursor(NULL), m_databaseActivityCursor(NULL), m_databaseStatisticsCursor(NULL)
+	m_databaseServicesCursor(NULL), m_databaseServiceTypesCursor(NULL), m_databasePermissionsCursor(NULL), m_databaseActivityCursor(NULL), m_databaseStatisticsCursor(NULL), m_databaseStatusCursor(NULL)
 {
 
 	// Initialize timers
@@ -107,6 +107,9 @@ AuthSocket::~AuthSocket() {
 	if (m_databaseStatisticsCursor) {
 		delete m_databaseStatisticsCursor;
 	}
+	if (m_databaseStatusCursor) {
+		delete m_databaseStatusCursor;
+	}
 	if (m_servClientSocket) {
 		delete m_servClientSocket;
 	}
@@ -519,8 +522,21 @@ void AuthSocket::commandLoop() {
 						if (activeID < 0) {
 							for (StationList::Iterator it(m_slist.begin()); it != m_slist.end(); ++it) {
 								if ((*it).services == st.services) {
-									m_stationID = (*it).id;
-									break;
+									// Verify that all services provided by this candidate workspace are online before allocating the workspace to a user
+									bool online = true;
+									m_databaseServicesCursor->select(TQString("station=%1").arg((*it).id));
+									while (m_databaseServicesCursor->next()) {
+										m_databaseStatusCursor->select(TQString("serviceid=%1").arg(m_databaseServicesCursor->value("hostname").toString()));
+										if (m_databaseStatusCursor->next()) {
+											if (m_databaseStatusCursor->value("online").toInt() == 0) {
+												online = false;
+											}
+										}
+									}
+									if (online) {
+										m_stationID = (*it).id;
+										break;
+									}
 								}
 							}
 			
@@ -713,6 +729,7 @@ int AuthSocket::connectToDatabase() {
 	m_databasePermissionsCursor = new TQSqlCursor("permissions", TRUE, m_database);
 	m_databaseActivityCursor = new TQSqlCursor("activity", TRUE, m_database);
 	m_databaseStatisticsCursor = new TQSqlCursor("statistics", TRUE, m_database);
+	m_databaseStatusCursor = new TQSqlCursor("status", TRUE, m_database);
 
 	return 0;
 }

servers/auth_server_lin/src/auth_conn.h

@@ -95,6 +95,7 @@ class AuthSocket : public TDEKerberosServerSocket
 		TQSqlCursor* m_databasePermissionsCursor;
 		TQSqlCursor* m_databaseActivityCursor;
 		TQSqlCursor* m_databaseStatisticsCursor;
+		TQSqlCursor* m_databaseStatusCursor;
 
 		StationList m_slist;