Find string in file and go back up in file to extract process name

If you need to search for a text string from time to time there is no problem searching line by line if it contains what you want or not. I also use a text file of the size you say and it takes less time to scroll through the refresh rate of the file you tell us.

I would make a copy of the file so that in the middle of the search it would not be a coincidence that it would refresh and search the chain from the beginning to the end of the file in case it comes out several times throughout the file and would save that copy in case I need more information later.

Finally I would go back to the previous line that contains "pid" and I would take that line or up to the first space if you only want the name of the executable. If your search appears in several lines it would give several concatenated results.

If that does not work for you, tell us and we look for another solution, but it should be enough.

I would not use a BD if you do not make much use of searches since being kept up to date is going to make you lose more control than the searches you have to do

UPDATE:

This is a code example:

public static void main(String[] args){
    String descarga = args[0];
    String buscado = args[1];

    boolean encontrado = false;
    String strLineaPid = null;

    try {
        // Abrimos el archivo
        FileReader fstream = new FileReader(descarga);
        // Creamos el Buffer de Lectura
        BufferedReader buffer = new BufferedReader(fstream);
        // Leer el archivo linea por linea
        String strLinea;

        while ((strLinea = buffer.readLine()) != null)   {
            //Guardo temporalmente la linea del proceso
            if(strLinea.contains("pid"))
                strLineaPid = strLinea;

            //Rompo el bucle y finalizo
            if(strLinea.contains(buscado)){
                encontrado = true;
                break;
            }
        }

        buffer.close();

    }catch (Exception e){
        System.err.println("Ocurrió un error: " + e.getMessage());
        e.printStackTrace();
    }

    if(encontrado)
        System.out.println("El proceso con " + buscado + " es " + strLineaPid);
    else
        System.out.println("Ningún processor con la palabra " + buscado);
}

It is done to pass parameters for the route and the searched word. I executed it by putting the "Test route-to-file wordSearch" The output I got was:

  

The process with wordSearch is anotherProcess.exe pid: 2 lele

The file used contained the following:

proces.exe pid: 1 lala

another line

another line

-

anotherProcess.exe pid: 2 lele

line searched

-

another ProcessMas.exe pid: 3 lili

another line

I hope that with this you are worth it.