get_property.cc

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#include "Common/Compat.h"
#include "Common/Init.h"

#include "AsyncComm/Config.h"

#include <iostream>

using namespace Hypertable;
using namespace Config;
using namespace std;

namespace {

  String lookup_property;

  const char *usage =
    "\n"
    "Usage: get_property [options] <property>\n\nOptions"
    ;

  struct AppPolicy : Policy {
    static void init_options() {
      cmdline_desc(usage);
      cmdline_hidden_desc().add_options()("property", str(), "");
      cmdline_positional_desc().add("property", -1);
    }
    static void init() {
      if (has("property"))
        lookup_property = get_str("property");
    }
  };

  typedef Cons<AppPolicy, DefaultCommPolicy> Policies;

} // local namespace

#define TRY(exp, t)        \
    try { cout << exp; goto bail; } catch (Exception &e) { if (t) throw e; }

int main(int argc, char **argv)
{
  try {
    init_with_policy<Policies>(argc, argv);
    if (properties->has(lookup_property)) {
      // issue 869: in order to avoid type conversion errors we have to try
      // all available conversion functions
      TRY(properties->get_str(lookup_property), false)
      TRY(properties->get_bool(lookup_property), false)
      TRY(properties->get_i16(lookup_property), false)
      TRY(properties->get_i32(lookup_property), false)
      TRY(properties->get_i64(lookup_property), false)
      TRY(properties->get_f64(lookup_property), true)
    }
    else {
      cout << lookup_property << "-PROPERTY-DOES-NOT-EXIST";
    }
  }
  catch (Exception &e) {
    HT_ERROR_OUT << e << HT_END;
  }

bail:
  cout << flush;
  quick_exit(EXIT_SUCCESS);
}