NSMCommunicator.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#ifndef _Belle2_NSMCommunicator_hh
#define _Belle2_NSMCommunicator_hh
 
#include "daq/slc/nsm/NSMMessage.h"
#include "daq/slc/nsm/NSMNode.h"
 
#include <daq/slc/system/Mutex.h>
 
extern "C" {
#include <nsm2/nsm2.h>
}
 
#include <queue>
#include <vector>
 
namespace Belle2 {
  class NSMCallback;
  class NSMMessage;
 
  class NSMCommunicator {
 
    typedef std::vector<NSMCommunicator*> NSMCommunicatorList;
 
    friend class NSMData;
 
  public:
    static NSMCommunicator& select(double sec);
    static NSMCommunicator& connected(const std::string& node);
    static NSMCommunicatorList& get() { return g_comm; }
    static bool send(const NSMMessage& msg);
 
  private:
    static NSMCommunicatorList g_comm;
    static Mutex g_mutex;
    static Mutex g_mutex_select;
 
  public:
    NSMCommunicator(const std::string& host = "", int port = -1);
    explicit NSMCommunicator(NSMcontext* nsmc);
    ~NSMCommunicator() {}
 
  public:
    void init(const NSMNode& node, const std::string& host, int port)
    ;
    void setCallback(NSMCallback* callback);
    // 20191004 nakao
    // handling nsmlib_recv inside a user program is against the usage of NSM2
    void callContext();
 
  public:
    int getId() const { return m_id; }
    void setId(int id) { m_id = id; }
    NSMMessage& getMessage() { return m_message; }
    const NSMMessage& getMessage() const { return m_message; }
    void setMessage(const NSMMessage& msg);
    const NSMNode& getNode() const { return m_node; }
    int getNodeIdByName(const std::string& name);
    int getNodePidByName(const std::string& name);
    // 20191004 nakao
    // making hostname visible to application is against the philosophy of NSM2
    //const std::string getNodeHost(const std::string& nodename);
    //const std::string getNodeHost();
    const std::string& getHostName() { return m_host; }
    int getPort() { return m_port; }
    NSMCallback& getCallback();
    bool isConnected(const std::string& node);
    const std::string getNodeNameById(int id);
    void pushQueue(const NSMMessage& msg) { m_msg_q.push(msg); }
    bool hasQueue() const { return !m_msg_q.empty(); }
    NSMMessage popQueue();
 
  private:
    NSMcontext* getContext() { return m_nsmc; }
 
  private:
    bool sendRequest(const NSMMessage& msg);
 
  private:
    int m_id;
    NSMcontext* m_nsmc;
    NSMCallback* m_callback;
    NSMMessage m_message;
    std::string m_host;
    int m_port;
    NSMNode m_node;
    std::queue<NSMMessage> m_msg_q;
 
  };
 
  typedef std::vector<NSMCommunicator*> NSMCommunicatorList;
 
};
 
#endif