UVM- Using my own configuration files vs using config db - configuration

Question

I wrote a sequence which can be generic to a variety of tests. I want to do it by adding configuration files for each test.
The code for the sequnce:
//----------------------------------------------------------------------
//Sequence
//----------------------------------------------------------------------
class axi_sequence extends uvm_sequence#(axi_transaction);
`uvm_object_utils(axi_sequence)
//new
function new (string name = "axi_sequence");
super.new(name);
endfunction: new
//main task
task body();
int file_p, temp, len;
byte mode;
bit [31:0] addr;
string str;
axi_transaction axi_trx;
bit [31:0] transfers [$];
bit [31:0] data;
//open file
file_p = $fopen("./sv/write_only.txt", "r"); //the name of the file should be same as the name of the test
//in case file doesn't exist
`my_fatal(file_p != 0, "FILE OPENED FAILED")
//read file
while ($feof(file_p) == 0)
begin
temp = $fgets(str, file_p);
axi_trx = axi_transaction::type_id::create(.name("axi_trx"), .contxt(get_full_name()));
// ~start_item~ and <finish_item> together will initiate operation of
// a sequence item.
start_item(axi_trx);
transfers = {};
$sscanf(str, "%c %d %h", mode, len, addr);
//assign the data to str
str = str.substr(12,str.len()-1);
//create and assign to transfers queue
if(mode == "w")
begin
for (int i = 0; i <= len; i++) begin
temp = $sscanf(str, "%h", data);
`my_fatal(temp > 0, "THE LENGHT PARAM IS WRONG- too big")
transfers. push_back(data);
str = str.substr(13+(i+1)*8,str.len()-1);
end//end for
`my_fatal($sscanf(str, "%h", temp) <= 0, "THE LENGHT PARAM IS WRONG- too small")
end//if
axi_trx.init(mode,len,addr,transfers);
if (to_random == 1) to_random should be a part of the configuration file.
trx.my_random(); //trx is transaction instance
else
trx.delay = const_config; //const_delay should be a part of the configuration file.
//contains the send_request which send the request item to the sequencer, which will forward
// it to the driver.
finish_item(axi_trx);
end//begin
endtask: body
endclass: axi_sequence
Should I do it by using different configuration file, or can I do it by values that will be passed from the test to the agent through the config db?
And how can I pass different path (for the file_p = $fopen()) for each test?

Answer 1

You shouldn't need a separate configuration file for each test. Ideally, you would just pass down the configuration from the test level down into the env through the config_db (or through a separate configuration object for your agent)
When you create your sequence in your test (or virtual sequencer), you should be able to set your variables as needed.