recursive_file_copy.cpp

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#ifndef RECURSIVE_FILE_COPY_IMPLEMENTATION_FILE
#define RECURSIVE_FILE_COPY_IMPLEMENTATION_FILE

/*****************************************************************************\
*                                                                             *
*  Name   : recursive_file_copy                                               *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2005-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include "file_transfer_infoton.h"
#include "file_transfer_tentacle.h"
#include "recursive_file_copy.h"

#include <basis/guards.h>
#include <basis/log_base.h>
#include <octopus/entity_defs.h>
#include <octopus/octopus.h>
#include <opsystem/application_shell.h>
#include <loggers/console_logger.h>
#include <opsystem/directory.h>
#include <opsystem/directory_tree.h>
#include <opsystem/filename.h>
#include <opsystem/filename_list.h>
#include <opsystem/heavy_file_ops.h>
#include <opsystem/huge_file.h>
#include <data_struct/static_memory_gremlin.h>
#include <textual/string_manipulation.h>

using namespace basis;

#define FAKE_HOSTNAME "internal_fake_host"

#undef LOG
#define LOG(s) CLASS_EMERGENCY_LOG(program_wide_logger(), s)

const int MAX_CHUNK_RFC_COPY_HIER = 1 * MEGABYTE;
  // maximum size for each transfer chunk.

recursive_file_copy::~recursive_file_copy() {}

const char *recursive_file_copy::outcome_name(const outcome &to_name)
{ return common::outcome_name(to_name); }

#define RETURN_ERROR_RFC(msg, err) { \
  LOG(msg); \
  return err; \
}

outcome recursive_file_copy::copy_hierarchy(const istring &source_dir,
    const istring &target_dir, const string_array &includes,
    const istring &source_start)
{
  FUNCDEF("copy_hierarchy");

/*
  string_array includes;
  if (__argc >= 5) {
    for (int i = 4; i < __argc; i++) {
      includes += __argv[i];
    }
  }
*/

  istring source_root = "snootums";
  if (source_start.t()) {
    source_root += filename::default_separator() + source_start;
  }

  octopus ring_leader(FAKE_HOSTNAME, 10 * MEGABYTE);
  file_transfer_tentacle *tran = new file_transfer_tentacle
      (MAX_CHUNK_RFC_COPY_HIER, false);
  ring_leader.add_tentacle(tran);

  outcome add_ret = tran->add_correspondence("snootums", source_dir,
      10 * MINUTE_ms);
  if (add_ret != tentacle::OKAY)
    RETURN_ERROR_RFC("failed to add the correspondence", NOT_FOUND);

  file_transfer_infoton *initiate = new file_transfer_infoton;
  initiate->_request = true;
  initiate->_command = file_transfer_infoton::TREE_COMPARISON;
  initiate->_src_root = source_root;
  initiate->_dest_root = target_dir;
  directory_tree target_area(target_dir);
  target_area.calculate();
  initiate->package_tree_info(target_area, includes);

  octopus_entity ent = ring_leader.issue_identity();
  octopus_request_id req_id(ent, 1);
  outcome start_ret = ring_leader.evaluate(initiate, req_id);
  if (start_ret != tentacle::OKAY)
    RETURN_ERROR_RFC("failed to start the comparison", NONE_READY);

  file_transfer_infoton *reply_from_init
      = (file_transfer_infoton *)ring_leader.acquire_specific_result(req_id);
  if (!reply_from_init)
    RETURN_ERROR_RFC("no response to tree compare start", NONE_READY);

  filename_list diffs;
  byte_array pack_copy = reply_from_init->_packed_data;
  if (!diffs.unpack(pack_copy)) {
    RETURN_ERROR_RFC("could not unpack filename list!", GARBAGE);
  }
//  LOG(istring("got list of diffs:\n") + diffs.text_form());

  octopus client_spider(FAKE_HOSTNAME, 10 * MEGABYTE);
  file_transfer_tentacle *tran2 = new file_transfer_tentacle
      (MAX_CHUNK_RFC_COPY_HIER, false);
  tran2->register_file_transfer(ent, source_root, target_dir, includes);
  client_spider.add_tentacle(tran2);

  octopus_request_id resp_id(ent, 2);
  outcome ini_resp_ret = client_spider.evaluate(reply_from_init, resp_id);
  if (ini_resp_ret != tentacle::OKAY)
    RETURN_ERROR_RFC("failed to process the start response!", FAILURE);

  infoton *junk = client_spider.acquire_specific_result(resp_id);
  if (junk)
    RETURN_ERROR_RFC("got a response we shouldn't have!", FAILURE);

  int iter = 0;
  while (true) {
//LOG(isprintf("ongoing chunk %d", ++iter));

    // keep going until we find a broken reply.
    file_transfer_infoton *ongoing = new file_transfer_infoton;
    ongoing->_request = true;
    ongoing->_command = file_transfer_infoton::PLACE_FILE_CHUNKS;
    ongoing->_src_root = source_root;
    ongoing->_dest_root = target_dir;

    octopus_request_id chunk_id(ent, iter + 10);
    outcome place_ret = ring_leader.evaluate(ongoing, chunk_id);
    if (place_ret != tentacle::OKAY)
      RETURN_ERROR_RFC("failed to run ongoing transfer", FAILURE);
  
    file_transfer_infoton *reply = (file_transfer_infoton *)ring_leader
         .acquire_specific_result(chunk_id);
    if (!reply)
      RETURN_ERROR_RFC("failed to get ongoing transfer reply", NONE_READY);

    if (!reply->_packed_data.length()) {
      LOG("hit termination condition: no data packed in for file chunks.");
      break;
    }

    byte_array copy = reply->_packed_data;
    while (copy.length()) {
      file_transfer_header head;
      if (!head.unpack(copy)) 
        RETURN_ERROR_RFC("failed to unpack header", GARBAGE);
//LOG(istring("header: ") + head.text_form());
//LOG(isprintf("size in array: %d", copy.length()));
      if (copy.length() < head._length)
        RETURN_ERROR_RFC("not enough length in array", GARBAGE);
      copy.zap(0, head._length - 1);
//LOG(isprintf("size in array now: %d", copy.length()));
    }
    if (copy.length())
      RETURN_ERROR_RFC("still had data in array", GARBAGE);

    octopus_request_id resp_id(ent, iter + 11);
    outcome resp_ret = client_spider.evaluate(reply, resp_id);
    if (resp_ret != tentacle::OKAY)
      RETURN_ERROR_RFC("failed to process the transfer reply!", FAILURE);
  }

  return OKAY;
}



#endif //RECURSIVE_FILE_COPY_IMPLEMENTATION_FILE

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