DimServerList.cc

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// **************************************************************************
// **************************************************************************
#include "DimServerList.h"

#include <sstream>
#include <algorithm>
#include <stdexcept>

using namespace std;



// --------------------------------------------------------------------------
//
//
DimServerList::DimServerList(DimServerListImp *list) : fList(list),
    fDimServers("DIS_DNS/SERVER_LIST", const_cast<char*>(""), this)
{
}

// --------------------------------------------------------------------------
//
//
void DimServerList::infoHandler()
{
    if (getInfo()!=&fDimServers)
        return;

    // Get the received string from the handler
    const string str = fDimServers.getString();

    // Check if it starts with + or -
    if (str[0]!='-' && str[0]!='+')
    {
        fList->RemoveAllServers();
        fServerList.clear();
    }

    // Create a stringstream to tokenize the received string
    stringstream stream(str);

    // Loop over the seperating tokens
    string buffer;
    while (getline(stream, buffer, '|'))
    {
        // The first part before the first @ is the server name
        const string server = buffer.substr(0, buffer.find_first_of('@'));
        if (server.empty())
            continue;

        // If it starts with a - we have to remove an entry
        if (server[0]=='-')
        {
            const string trunc = server.substr(1);

            // Check if this server is not found in the list.
            // This should never happen if Dim works reliable
            const ServerList::iterator v = find(fServerList.begin(), fServerList.end(), trunc);
            if (v==fServerList.end())
            {
                //stringstream err;
                //err << "DimServerList: Server '" << trunc << "' not in list as it ought to be.";
                //throw runtime_error(err.str());
            }

            fList->RemoveServer(trunc);
            fServerList.erase(v);

            continue;
        }

        // If it starts with a + we have to add an entry
        if (server[0]=='+')
        {
            const string trunc = server.substr(1);

            // Check if this server is already in the list.
            // This should never happen if Dim works reliable
            const ServerList::iterator v = find(fServerList.begin(), fServerList.end(), trunc);
            if (v!=fServerList.end())
            {
                fList->RemoveServer(trunc);
                fServerList.erase(v);

                //stringstream err;
                //err << "DimServerList: Server '" << trunc << "' in list not as it ought to be.";
                //throw runtime_error(err.str());
            }

            fServerList.push_back(trunc);
            fList->AddServer(trunc);

            continue;
        }

        // In any other case we just add the entry to the list
        fServerList.push_back(server);
        fList->AddServer(server);
    }
}

// --------------------------------------------------------------------------
//
bool DimServerList::HasServer(const std::string &server) const
{
    return find(fServerList.begin(), fServerList.end(), server)!=fServerList.end();
}