Lookup.h

#ifndef SCT_LOOKUP_H
#define SCT_LOOKUP_H



#include <string>
#include "ipc/partition.h"
#include "is/info.h"
#include "Sct/SctNames.h"
#include "Sct/MultiMessageDebugStream.h"

namespace Sct {

  template < class TT >
  typename TT::_ptr_type Lookup(const std::string & name, const IPCPartition & p){
    const bool PRINT_DEBUG = true;
    
    typename TT::_ptr_type ob = TT::_nil();
    bool valid=false;
    int ntries=0;
    const int maxtries=10; // must be >= 2
    
    while (valid==false && ntries<maxtries){

      if (PRINT_DEBUG) {
        MultiMessageDebugStream m(true,false,false);
        m << "Starting attempt " << ntries;
        m.flush();
      };
      
      const bool NIL=CORBA::is_nil(ob);
      bool NXT=true;
      try {
        if (PRINT_DEBUG) {
          MultiMessageDebugStream m(true,false,false);
          m << "about to test existence";
          m.flush();
        };
        NXT=ob->_non_existent();
      } catch (const ipc::CacheExpired & e) {
    NXT=true; // Since it appears not to exist yet !   :(
      };
      
      if (PRINT_DEBUG) {
        MultiMessageDebugStream m(true,false,false);
        m << "thingkinsdf";
        m.flush();
      };
      
      if (NIL || NXT) {
    if (PRINT_DEBUG) {
      MultiMessageDebugStream m(true,false,false);
      m << "At attempt "<<ntries<<" it was found that NIL="<<NIL<<" and NXT="<<NXT<<" so trying to lookup again!";
      m.flush();
        };    
    try {
          ob = (p.template lookup<TT>( name ));
      if (PRINT_DEBUG) {
        MultiMessageDebugStream m(true,false,false);
        m << "No exception here, fortunately";
        m.flush();
      };
    } catch (const ipc::CacheExpired & e) {
      ob = TT::_nil(); // let's try again
      if (PRINT_DEBUG) {
        MultiMessageDebugStream m(true,false,false);
        m << "Good job we caught that!";
        m.flush();
      };
    };
      } else {
    if (PRINT_DEBUG) {
      MultiMessageDebugStream m(true,false,false);
      m << "At attempt "<<ntries<<" we think we have a good answer.";
      m.flush();
    };    
        valid=true;
      }
      ++ntries;
    }
    if (!valid) {
      if (PRINT_DEBUG) {
        Sct::MultiMessageDebugStream m(true,true,false);
        m << "Our lookup wrapper failed to look up ["<<name<<"] after "<<maxtries<<" attempts.";
        m.flush();
      };
      return TT::_nil();
    } else {
      if (PRINT_DEBUG) {
    MultiMessageDebugStream m(true,false,false);
    m << "Lookup returning something successfully";
    m.flush();  
      };
      return ob;
    }
  };
  
};
#endif

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