NetworkTable interface: Provide method to set persistent filename.

include/networktables/NetworkTable.h

@@ -17,6 +17,7 @@ class NetworkTable : public ITable {
   std::vector<Listener> m_listeners;
 
   static std::string s_ip_address;
+  static std::string s_persistent_filename;
   static bool s_client;
   static bool s_running;
 
@@ -62,6 +63,13 @@ class NetworkTable : public ITable {
    */
   static void SetIPAddress(llvm::StringRef address);
 
+  /**
+   * Sets the persistent filename.
+   * @param filename the filename that the network tables server uses for
+   * automatic loading and saving of persistent values
+   */
+  static void SetPersistentFilename(llvm::StringRef filename);
+
   /**
    * Sets the network identity.
    * This is provided in the connection info on the remote end.

java/src/edu/wpi/first/wpilibj/networktables/NetworkTable.java

@@ -112,6 +112,18 @@ public class NetworkTable implements ITable, IRemote {
     port = aport;
   }
 
+  /**
+   * Sets the persistent filename.
+   * @param filename the filename that the network tables server uses for
+   * automatic loading and saving of persistent values
+   */
+  public synchronized static void setPersistentFilename(final String filename) {
+    if (persistentFilename == filename)
+      return;
+    checkInit();
+    persistentFilename = filename;
+  }
+
   /**
    * Sets the network identity.
    * This is provided in the connection info on the remote end.

src/networktables/NetworkTable.cpp

@@ -10,6 +10,7 @@ using llvm::StringRef;
 
 const char NetworkTable::PATH_SEPARATOR_CHAR = '/';
 std::string NetworkTable::s_ip_address;
+std::string NetworkTable::s_persistent_filename = "networktables.ini";
 bool NetworkTable::s_client = false;
 bool NetworkTable::s_running = false;
 
@@ -18,7 +19,7 @@ void NetworkTable::Initialize() {
   if (s_client)
     nt::StartClient(s_ip_address.c_str(), NT_DEFAULT_PORT);
   else
-    nt::StartServer("networktables.ini", "", NT_DEFAULT_PORT);
+    nt::StartServer(s_persistent_filename, "", NT_DEFAULT_PORT);
   s_running = true;
 }
 
@@ -47,6 +48,10 @@ void NetworkTable::SetTeam(int team) {
 
 void NetworkTable::SetIPAddress(StringRef address) { s_ip_address = address; }
 
+void NetworkTable::SetPersistentFilename(StringRef filename) {
+  s_persistent_filename = filename;
+}
+
 void NetworkTable::SetNetworkIdentity(StringRef name) {
   nt::SetNetworkIdentity(name);
 }