---

namingserviceimpl.cc

Go to the documentation of this file.

/**************************************************************************
 Copyright (c) 2000-2001, Tony Garnock-Jones
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:

     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.

     * Redistributions in binary form must reproduce the above
       copyright notice, this list of conditions and the following
       disclaimer in the documentation and/or other materials provided
       with the distribution.

     * Neither the names of the copyright holders nor the names of this
       software's contributors may be used to endorse or promote
       products derived from this software without specific prior
       written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>

#include <mps/mps.h>
#include <mps/mpsnaming.h>

#include <mps/transport_inet.h>

#include <string>
#include <map>
#include <exception>

using namespace org::hebe::mps::naming;

static bool debugOn = false;

class NamingServiceImpl: public NamingService {
private:
  typedef map<string, string> dict_t;

  dict_t dict;

public:
  NamingServiceImpl() {}
  virtual ~NamingServiceImpl() {}

  virtual string resolve(string const &objectName);
  virtual bool bind(string const &objectName, string const &address, bool replace);
  virtual bool unbind(string const &objectName);
  virtual vector<Binding> enumerate();
};

string NamingServiceImpl::resolve(string const &objectName) {
  if (objectName.substr(0, 4) == "mps:")
    return objectName;

  dict_t::iterator i = dict.find(objectName);
  return (i == dict.end()) ? "" : (*i).second;
}

bool NamingServiceImpl::bind(string const &objectName, string const &address, bool replace)
{
  if (objectName.substr(0, 4) == "mps:") {
    // Disallow binding of names that could be confused with addresses.
    return true;
  }

  dict_t::iterator i = dict.find(objectName);
  if (i != dict.end() && !replace)
    return false;

  if (debugOn)
    fprintf(stderr, "Binding \"%s\" to \"%s\"\n", objectName.c_str(), address.c_str());

  dict[objectName] = address;
  return true;
}

bool NamingServiceImpl::unbind(string const &objectName) {
  dict_t::iterator i = dict.find(objectName);
  if (i != dict.end()) {
    if (debugOn)
      fprintf(stderr, "Unbinding \"%s\" from \"%s\"\n", objectName.c_str(), (*i).second.c_str());

    dict.erase(i);
    return true;
  }

  return false;
}

vector<Binding> NamingServiceImpl::enumerate() {
  vector<Binding> results;

  for (dict_t::iterator i = dict.begin();
       i != dict.end();
       i++) {
    results.push_back(Binding((*i).first, (*i).second));
  }

  return results;
}

void usage() {
  fprintf(stderr,
          "Usage: mps_naming [-p <portnumber>] [-i <interfacename>] [-d]\n"
          "    <portnumber> defaults to 9091\n"
          "    <interfacename> defaults to \"localhost\"\n"
          "    -d is for debug information\n");
}

int main(int argc, char *argv[]) {
  int portNumber = 9091;
  string hostname = "";

  char optc;
  while ((optc = MPS_getopt(argc, argv, "dhp:i:")) != EOF) {
    switch (optc) {
      case 'd':
        debugOn = true;
        break;

      case 'h':
        usage();
        return 0;

      case 'p':
        portNumber = atoi(MPS_optarg);
        break;

      case 'i':
        hostname = MPS_optarg;
        break;

      default:
        fprintf(stderr, "mps_naming: invalid command-line parameter '%c'", optc);
        usage();
        return 1;
    }
  }

  try {

    ref<NamingServiceImpl> impl = new NamingServiceImpl();
    NamingServiceServer server("NamingService", impl);

    MPS::InetTransport::initialise(hostname,
                                   portNumber);

    impl->bind(server.getObjectName(),
               MPS::Transport::bindServer(&server, "mps:inet"),
               true);

    MPS::InetTransport::getFdMgr()->mainloop();

  } catch (FileDescriptor::Exception &e) {
    fprintf(stderr, "FileDescriptor::Exception: %s (%d %s)\n", e.what(),
            e.getErrno(), strerror(e.getErrno()));
    return 1;
  } catch (std::exception &se) {
    fprintf(stderr, "std::exception: %s\n", se.what());
    return 1;
  } catch (...) {
    fprintf(stderr, "UNCAUGHT EXCEPTION!\n");
    return 1;
  }

  return 0;
}

---