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It doesn't appear to be a conventionally exposed interface for doing so, but if you have a look in stacks/ros_comm/clients/cpp/roscpp/src/libros you'll find param.cpp where ros does it's parameter handling for each node.

In:

   void init(const M_string& remappings)

you'll see that they set up a callback:

   XMLRPCManager::instance()->bind("paramUpdate", paramUpdateCallback);

Which is used to update the local parameter table. You might be able to set up your own callback to do this, but I'm unsure if it would interfere with the node's own parameter updating.

The signature of the callback looks like this btw:

    void callback(XmlRpc::XmlRpcValue& params, XmlRpc::XmlRpcValue& result)

You can look at param.cpp for details on how to use the arguments.

It doesn't appear to be a conventionally exposed interface for doing so, but if you have a look in stacks/ros_comm/clients/cpp/roscpp/src/libros you'll find param.cpp where ros does it's parameter handling for each node.node. (edit) You can try to emulate what they did.

In:

   void init(const M_string& remappings)

you'll see that they set up a callback:

   XMLRPCManager::instance()->bind("paramUpdate", paramUpdateCallback);

Which is used to update the local parameter table. You might be able to set up your own callback to do this, but I'm unsure if it would interfere with the node's own parameter updating.

The signature of the callback looks like this btw:

    void callback(XmlRpc::XmlRpcValue& params, XmlRpc::XmlRpcValue& result)

You can look at param.cpp for details on how to use the arguments.

It doesn't appear to be a conventionally exposed interface for doing so, and it's probably not a recommended route, but if you have a look in stacks/ros_comm/clients/cpp/roscpp/src/libros you'll find param.cpp where ros does it's parameter handling for each node. (edit) You can try to emulate what they did.

In:

   void init(const M_string& remappings)

you'll see that they set up a callback:

   XMLRPCManager::instance()->bind("paramUpdate", paramUpdateCallback);

Which is used to update the local parameter table. You might be able to set up your own callback to do this, but I'm unsure if it would interfere with the node's own parameter updating.

The signature of the callback looks like this btw:

    void callback(XmlRpc::XmlRpcValue& params, XmlRpc::XmlRpcValue& result)

You can look at param.cpp for details on how to use the arguments.

It doesn't appear to be a conventionally exposed interface for doing so, and it's probably not a recommended route, route, but if you have a look in stacks/ros_comm/clients/cpp/roscpp/src/libros you'll find param.cpp where ros does it's parameter handling for each node. (edit) You can try to emulate what they did.

In:

   void init(const M_string& remappings)

you'll see that they set up a callback:

   XMLRPCManager::instance()->bind("paramUpdate", paramUpdateCallback);

Which is used to update the local parameter table. You might be able to set up your own callback to do this, but I'm unsure if it would interfere with the node's own parameter updating.

The signature of the callback looks like this btw:

    void callback(XmlRpc::XmlRpcValue& params, XmlRpc::XmlRpcValue& result)

You can look at param.cpp for details on how to use the arguments.