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salome-kernel  6.5.0
Salome_file

This page introduces the Salome_file feature.

Salome_file is based on the SALOME_FileTransfer. It extends it to enable a higher model for managing files into SALOME applications.

Principles

Salome_file is a CORBA object. It's role is to managed many system files. When a Salome_file is created, no files are managed. Then, files are added using Salome_file_i interface. A file is represented by a name and a path.

There is two different cases when a file is added :

To be able to get a distributed file, the Salome_file has to be connected with an another Salome_file that managed this file. This distributed Salome_file could be located into a distributed resource.

Simple example

This section shows a simple example of the use of Salome_file. The objective is to create two Salome_file; one is managing a local file, the other is managing a distributed file. Then, these Salome_files are connected to enable the copy of the real file gbetween the two Salome_files.

Firstly, two Salome_files are created :

#include "Salome_file_i.hxx"

int main (int argc, char * argv[])
{
  Salome_file_i file_source;
  Salome_file_i file_dest;

Secondly, the real files are registered into the Salome_files.

 file_source.setLocalFile("/bin/cat");
 file_dest.setDistributedFile("/tmp/cat_copy");

Thirdly, we connect the destination file with the source file :

  file_dest.connect(file_source);

Finally, the file is sended using Salome_file interface.

  file_dest.recvFiles();
  // Status check
  state = file_dest.getSalome_fileState();
  print_state(state); // You have to implement this function.
};

Advanced example

This advanced example illustrates a part of the Salome_file API dedicated for situations where multiple files are managed.

This is the situation :

#include "Salome_file_i.hxx"

int main (int argc, char * argv[])
{
  Salome_file_i file_source_a;
  Salome_file_i file_source_b;
  Salome_file_i file_dest;

  file_source_a.setLocalFile("/bin/cat");
  file_source_a.setLocalFile("/bin/ls");

  file_source_b.setLocalFile("/bin/echo");
  file_source_b.setLocalFile("/bin/cp");

  file_dest.setDistributedFile("/tmp/cat_copy");
  file_dest.setDistributedFile("/tmp/echo_copy");

There is two problems in this case.

The first problem is in the file_dest Salome_file, there is two files. If the method connect is used, the Salome_file cannot know if the reference is for cat_copy or echo_copy. Indeed echo_copy could be provided by another Salome_file that for cat_copy.

The second problem comes from the two files of file_source_a Salome_file. Indeed when connect is used, there is no information about the choice of the source file into the source Salome_file. For cat_copy, did the used want cat or echo ?

To avoid these cases, Salome_file API provides advanced methods :

  file_dest.connectDistributedFile("cat_copy", file_source_a);
  file_dest.setDistributedSourceFile("cat_copy", "cat");

  file_dest.connectDistributedFile("cat_echo", file_source_b);
  file_dest.setDistributedSourceFile("cat_echo", "echo");

  file_dest.recvFiles();
  // Status check
  state = file_dest.getSalome_fileState();
  print_state(state); // You have to implement this function.
};