UVM - db_config question on parameterization

UVM
,
1

Just another question on setting up the parameters in uvm_config_db get and set method.

// always need 2 things
`include "uvm_macros.svh"
import uvm_pkg::*;

// sharing across 2 components
class comp1 extends uvm_component;
    `uvm_component_utils(comp1)

    int comp1_data = 0; 

    function new(input string path = "comp1", uvm_component parent = null);
        super.new(path, parent);

    endfunction

    virtual function void build_phase(uvm_phase phase);
        super.build_phase(phase);

        if(!uvm_config_db#(int)::get(this, "", "data", comp1_data))              uvm_test_top.myenv_myagent.comp1.comp1_data
            `uvm_error("comp1", "Unable to share data");

    endfunction 

    virtual task run_phase(uvm_phase phase);
        phase.raise_objection(this);
            `uvm_info("comp1", $sformatf("Data rcvd comp1 : %0d", comp1_data), UVM_NONE);
        phase.drop_objection(this); 

    endtask

endclass


class myagent extends uvm_agent; 
    `uvm_component_utils(myagent)

    function new(input string path = "myagent", uvm_component c);
        super.new(path, c);

    endfunction


    comp1 c1; 

    virtual function void build_phase(uvm_phase phase);
        super.build_phase(phase);
        c1 = comp1::type_id::create("comp1", this);

    endfunction
endclass


class myenv extends uvm_env;
    `uvm_component_utils(myenv)

    int data; 

    function new(string path = "myenv", uvm_component parent = null);
        super.new(path, parent);
        
    endfunction

    myagent a; 

    virtual function void build_phase(uvm_phase phase);
        super.build_phase(phase);

        // declare agent here 
        a = myagent::type_id::create("myagent", this);

    endfunction

endclass

// the test to change values

class the_test extends uvm_test; 
    `uvm_component_utils(the_test)

    myenv the_env; 

    function new(string path = "the_test", uvm_component parent = null);
        super.new(path, parent);

    endfunction

    virtual function void build_phase(uvm_phase phase);
        super.build_phase(phase);

        // define component hierarchy 
        the_env = myenv::type_id::create("the_env", this);

    endfunction

endclass 


// top level
module tb (

);
    int data1 = 256; 

    initial begin
        uvm_config_db #(int)::set(null, "uvm_test_top.myenv.myagent.comp1", "data", data1);

        run_test("the_test");

    end


endmodule

So I wanted to see if instead of using null as the first parameter of the get function in comp1, I used ‘this’ instead and for the second parameter, I did not include in the instance name; however, in the tb part of the code, I did list out the entire hierarchy path in the second parameter of the tb module. However, this sends an error to the compiler, and I was wondering if there are other ways of writing out the parameters that would allow sharing data across different components.