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//
// file : eventconsumer.h
//
// description : C++ include file for implementing the TANGO event related client classes - EventConsumer and others.
// These classes are used to receive events from the server and from the notification service.
//
// author(s) : E.Taurel (taurel@esrf.fr)
//
// Copyright (C) : 2011,2012,2013,2014,2015
// European Synchrotron Radiation Facility
// BP 220, Grenoble 38043
// FRANCE
//
// This file is part of Tango.
//
// Tango is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Tango is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License along with Tango.
// If not, see <http://www.gnu.org/licenses/>.
//
// $Revision$
//
//====================================================================================================================
#ifndef _EVENTCONSUMER_H
#define _EVENTCONSUMER_H
#include <attribute.h>
#include <except.h>
#include <tango_const.h>
#include <COS/CosNotification.hh>
#include <COS/CosNotifyChannelAdmin.hh>
#include <COS/CosNotifyComm.hh>
#include <omnithread.h>
#include <map>
#include <readers_writers_lock.h>
#include <zmq.hpp>
#ifdef ZMQ_VERSION
#if ZMQ_VERSION > 30201
#define ZMQ_HAS_DISCONNECT
#endif
#endif
namespace Tango
{
#ifndef _USRDLL
extern "C"
{
#endif
void leavefunc();
#ifndef _USRDLL
}
#endif
/********************************************************************************
* *
* ZMQ event unmarshalling related classes *
* *
*******************************************************************************/
/*** TangoCdrMemoryStream ***/
class TangoCdrMemoryStream : public cdrMemoryStream
{
public:
enum Unmarshal_type
{
UN_ATT,
UN_PIPE
};
TangoCdrMemoryStream(void *buf,size_t si):cdrMemoryStream(buf,si) {}
TangoCdrMemoryStream():cdrMemoryStream(512,false) {}
void tango_get_octet_array(int size);
void *get_end_out_buf() {return pd_outb_end;}
void *get_mkr_out_buf() {return pd_outb_mkr;}
void *get_end_in_buf() {return pd_inb_end;}
void *get_mkr_in_buf() {return pd_inb_mkr;}
void set_mkr_in_buf(void *_ptr) {pd_inb_mkr=_ptr;}
void rewind_in(int _nb) {pd_inb_mkr = (char *)pd_inb_mkr - _nb;}
void set_un_marshal_type(Unmarshal_type _ty) {un_type=_ty;}
Unmarshal_type get_un_marshal_type() {return un_type;}
omni::ptr_arith_t align_to(omni::ptr_arith_t p,omni::alignment_t align);
protected:
Unmarshal_type un_type;
};
inline omni::ptr_arith_t TangoCdrMemoryStream::align_to(omni::ptr_arith_t p,omni::alignment_t align)
{
return (p + ((omni::ptr_arith_t) align - 1)) & ~((omni::ptr_arith_t) align - 1);
}
inline void TangoCdrMemoryStream::tango_get_octet_array(int size)
{
pd_inb_mkr = (void*)((char *)pd_inb_mkr+size);
}
/*** ZmqAttrValUnion ***/
class ZmqAttrValUnion:public AttrValUnion
{
public:
void operator<<= (TangoCdrMemoryStream &);
template <typename T,typename TA>
void init_seq(char *,_CORBA_ULong &,TangoCdrMemoryStream &);
template <typename T>
void set_seq(T &) {cerr << "In default ZmqAttrValUnion::set_seq!" << endl;assert(false);}
template <typename T>
T &get_seq() {cerr << "In default ZmqAttrValUnion::get_seq!" << endl;assert(false);}
};
/*** ZmqAttributeValue_4 ***/
struct ZmqAttributeValue_4:public AttributeValue_4
{
ZmqAttrValUnion zvalue;
void operator<<= (TangoCdrMemoryStream &);
};
/*** ZmqAttributeValue_5 ***/
struct ZmqAttributeValue_5:public AttributeValue_5
{
ZmqAttrValUnion zvalue;
void operator<<= (TangoCdrMemoryStream &);
};
/*** ZmqDevPipeData ***/
struct ZmqDevPipeData:public DevPipeData
{
void operator<<= (TangoCdrMemoryStream &);
};
/*** ZmqDevPipeBlob ***/
struct ZmqDevPipeBlob:public DevPipeBlob
{
void operator<<= (TangoCdrMemoryStream &);
};
/*** ZmqDevVarPipeDataEltArray ***/
class ZmqDevVarPipeDataEltArray:public DevVarPipeDataEltArray
{
public:
void operator<<= (TangoCdrMemoryStream &);
};
/*** ZmqDevPipeDataElt ***/
struct ZmqDevPipeDataElt:public DevPipeDataElt
{
void operator<<= (TangoCdrMemoryStream &);
};
/*** Macros to help coding ***/
#ifndef Swap16
#define Swap16(s) ((((s) & 0xff) << 8) | (((s) >> 8) & 0xff))
#else
#error "Swap16 has already been defined"
#endif
#ifndef Swap32
#define Swap32(l) ((((l) & 0xff000000) >> 24) | \
(((l) & 0x00ff0000) >> 8) | \
(((l) & 0x0000ff00) << 8) | \
(((l) & 0x000000ff) << 24))
#else
#error "Swap32 has already been defined"
#endif
//
// These template specialization allow us to set or get sequences within a AttrValUnion union.
// Union method to get/set sequence value are named short_att_value(), double_att_value(),
// float_att_value()....
//
#define SEQ_METH(NAME,TYPE) \
template <> \
inline void ZmqAttrValUnion::set_seq<TYPE>(TYPE &val) {NAME##_att_value(val);} \
\
template <> \
inline TYPE &ZmqAttrValUnion::get_seq<TYPE>() {return NAME##_att_value();}
/*** Macros call to generate required template specialisation ***/
SEQ_METH(short,DevVarShortArray)
SEQ_METH(double,DevVarDoubleArray)
SEQ_METH(float,DevVarFloatArray)
SEQ_METH(ushort,DevVarUShortArray)
SEQ_METH(bool,DevVarBooleanArray)
SEQ_METH(long,DevVarLongArray)
SEQ_METH(long64,DevVarLong64Array)
SEQ_METH(ulong,DevVarULongArray)
SEQ_METH(uchar,DevVarUCharArray)
SEQ_METH(ulong64,DevVarULong64Array)
SEQ_METH(state,DevVarStateArray)
/** Template methods definition ***/
//
// Create a dummy empty sequence and init union with this dummy sequence (minimun data copy)
// Retrieve a reference to that sequence once it is in the union and replace its data pointer
// by the data in the CdrMemoryStream.
// Use set_seq(), get_seq() specialized template created just above to set/get union sequences
// T is the basic data type (DevShort)
// TA is the sequence data type (DevVarShortArray)
//
// Also manage big and litle endian!!
//
template <typename T,typename TA>
inline void ZmqAttrValUnion::init_seq(char *base_ptr,_CORBA_ULong &length,TangoCdrMemoryStream &_n)
{
TA dummy_val;
set_seq<TA>(dummy_val);
T *ptr;
if (_n.get_un_marshal_type() == TangoCdrMemoryStream::UN_ATT)
ptr = (T *)(base_ptr + _n.currentInputPtr());
else
{
char *tmp = (char *)_n.get_mkr_in_buf();
int delta = tmp - base_ptr;
ptr = (T *)(base_ptr + delta);
}
if (_n.unmarshal_byte_swap() == true)
{
if (sizeof(T) == 2)
{
for (_CORBA_ULong i = 0;i < length;i++)
{
_CORBA_UShort *tmp_ptr = (_CORBA_UShort *)ptr;
_CORBA_UShort tt = *(tmp_ptr + i);
*(tmp_ptr + i) = Swap16(tt);
}
}
else if (sizeof(T) == 4)
{
for (_CORBA_ULong i = 0;i < length;i++)
{
_CORBA_ULong *tmp_ptr = (_CORBA_ULong *)ptr;
_CORBA_ULong t = *(tmp_ptr + i);
*(tmp_ptr + i) = Swap32(t);
}
}
else if (sizeof(T) == 8)
{
_CORBA_ULong double_length = length * 2;
for (_CORBA_ULong i = 0;i < double_length;i += 2)
{
_CORBA_ULong *tmp_ptr = (_CORBA_ULong *)ptr;
_CORBA_ULong tl1 = *(tmp_ptr + i + 1);
_CORBA_ULong tl2 = Swap32(tl1);
tl1 = *(tmp_ptr + i);
*(tmp_ptr + i) = tl2;
*(tmp_ptr + i + 1) = Swap32(tl1);
}
}
}
TA &the_seq = get_seq<TA>();
the_seq.replace(length,length,ptr,false);
_n.tango_get_octet_array((length * sizeof(T)));
}
/********************************************************************************
* *
* KeepAliveThCmd class *
* *
*******************************************************************************/
class KeepAliveThCmd:public omni_mutex
{
public :
KeepAliveThCmd():cmd_pending(false),cond(this) {};
bool cmd_pending; // The new command flag
KeepAliveCmdCode cmd_code; // The command code
omni_condition cond;
};
/********************************************************************************
* *
* Map structures *
* *
*******************************************************************************/
typedef struct event_not_connected
{
DeviceProxy *device;
string attribute;
EventType event_type;
string event_name;
int event_id;
CallBack *callback;
EventQueue *ev_queue;
vector<string> filters;
time_t last_heartbeat;
string prefix;
} EventNotConnected;
//------------------------ Event Callback related info --------------------------------------
typedef struct event_subscribe
{
EventQueue *ev_queue;
CallBack *callback;
int id;
} EventSubscribeStruct;
typedef struct event_callback_base
{
DeviceProxy *device;
string obj_name;
string event_name;
string channel_name;
string fully_qualified_event_name;
time_t last_subscribed;
TangoMonitor *callback_monitor;
vector<EventSubscribeStruct> callback_list;
bool alias_used;
} EventCallBackBase;
typedef struct event_callback_zmq
{
DevLong device_idl;
DevULong ctr;
string endpoint;
bool discarded_event;
bool fwd_att;
}EventCallBackZmq;
typedef struct event_callback: public EventCallBackBase, public EventCallBackZmq
{
string filter_constraint;
CosNotifyFilter::FilterID filter_id;
bool filter_ok;
} EventCallBackStruct;
//------------------------ Event Channel related info --------------------------------------
typedef struct event_channel_base
{
DeviceProxy *adm_device_proxy;
string full_adm_name;
time_t last_subscribed;
time_t last_heartbeat;
bool heartbeat_skipped;
TangoMonitor *channel_monitor;
ChannelType channel_type;
} EventChannelBase;
typedef struct event_channel_zmq
{
string endpoint;
size_t valid_endpoint;
}EventChannelZmq;
typedef struct channel_struct: public EventChannelBase, public EventChannelZmq
{
CosNotifyChannelAdmin::EventChannel_var eventChannel;
CosNotifyChannelAdmin::StructuredProxyPushSupplier_var structuredProxyPushSupplier;
CosNotifyFilter::FilterID heartbeat_filter_id;
string notifyd_host;
bool event_system_failed;
long has_notifd_closed_the_connection;
} EventChannelStruct;
typedef std::map<std::string,EventChannelStruct>::iterator EvChanIte;
typedef std::map<std::string,EventCallBackStruct>::iterator EvCbIte;
/********************************************************************************
* *
* EventConsumer class *
* *
*******************************************************************************/
class EventConsumer
{
typedef void (*EventCallbackFunction)(string event_name,string event_type,Tango::DeviceAttribute *attr_value);
public :
EventConsumer(ApiUtil *ptr);
virtual ~EventConsumer() {}
int connect_event(DeviceProxy *,const string &,EventType,CallBack *,EventQueue *,const vector<string> &,string &,int event_id = 0);
void connect(DeviceProxy *,string &,DeviceData &,string &,bool &);
void shutdown();
void shutdown_keep_alive_thread();
ChannelType get_event_system_for_event_id(int);
virtual void cleanup_EventChannel_map() = 0;
virtual void get_subscription_command_name(string &) = 0;
int subscribe_event(DeviceProxy *device, const string &attribute, EventType event,
CallBack *callback, const vector<string> &filters, bool stateless = false);
int subscribe_event(DeviceProxy *device, const string &attribute, EventType event,
int event_queue_size, const vector<string> &filters, bool stateless = false);
int subscribe_event(DeviceProxy *device, EventType event,CallBack *callback,bool stateless = false);
int subscribe_event(DeviceProxy *device, EventType event,int event_queue_size,bool stateless = false);
void unsubscribe_event(int event_id);
// methods to access data in event queues
void get_events (int event_id, EventDataList &event_list);
void get_events (int event_id, AttrConfEventDataList &event_list);
void get_events (int event_id, DataReadyEventDataList &event_list);
void get_events (int event_id, DevIntrChangeEventDataList &event_list);
void get_events (int event_id, PipeEventDataList &event_list);
void get_events (int event_id, CallBack *cb);
int event_queue_size(int event_id);
TimeVal get_last_event_date(int event_id);
bool is_event_queue_empty(int event_id);
int get_thread_id() {return thread_id;}
void add_not_connected_event(DevFailed &,EventNotConnected &);
static ReadersWritersLock &get_map_modification_lock() {return map_modification_lock;};
static KeepAliveThCmd cmd;
static EventConsumerKeepAliveThread *keep_alive_thread;
protected :
int subscribe_event(DeviceProxy *device, const string &attribute, EventType event,
CallBack *callback, EventQueue *ev_queue,
const vector<string> &filters, bool stateless = false);
friend class EventConsumerKeepAliveThread;
void attr_to_device(const AttributeValue *,const AttributeValue_3 *,long,DeviceAttribute *);
void attr_to_device(const AttributeValue_4 *,DeviceAttribute *);
void attr_to_device(const ZmqAttributeValue_4 *,DeviceAttribute *);
void attr_to_device(const ZmqAttributeValue_5 *,DeviceAttribute *);
template <typename T> void base_attr_to_device(const T *,DeviceAttribute *);
void att_union_to_device(const AttrValUnion *union_ptr,DeviceAttribute *dev_attr);
void conf_to_info(AttributeConfig_2 &,AttributeInfoEx **);
void get_cs_tango_host(Database *);
static map<std::string,std::string> device_channel_map; // key - device_name, value - channel name (full adm name)
static map<std::string,EventChannelStruct> channel_map; // key - channel_name (full adm name), value - Event Channel info
static map<std::string,EventCallBackStruct> event_callback_map; // key - callback_key, value - Event CallBack info
static ReadersWritersLock map_modification_lock;
static vector<EventNotConnected> event_not_connected;
static int subscribe_event_id; // unique event id
static vector<string> env_var_fqdn_prefix;
static map<std::string,std::string> alias_map; // key - real host name, value - alias
static omni_mutex ev_consumer_inst_mutex;
string device_name;
string obj_name_lower;
int thread_id;
int add_new_callback(EvCbIte &,CallBack *,EventQueue *,int);
void get_fire_sync_event(DeviceProxy *,CallBack *,EventQueue *,EventType,string &,const string &,EventCallBackStruct &,string &);
virtual void connect_event_channel(string &,Database *,bool,DeviceData &) = 0;
virtual void disconnect_event_channel(TANGO_UNUSED(string &channel_name),TANGO_UNUSED(string &endpoint),TANGO_UNUSED(string &endpoint_event)) {}
virtual void connect_event_system(string &,string &,string &e,const vector<string> &,EvChanIte &,EventCallBackStruct &,DeviceData &,size_t) = 0;
virtual void disconnect_event(string &,string &) {}
virtual void set_channel_type(EventChannelStruct &) = 0;
virtual void zmq_specific(DeviceData &,string &,DeviceProxy *,const string &) = 0;
};
/********************************************************************************
* *
* NotifdEventConsumer class *
* *
*******************************************************************************/
class NotifdEventConsumer : public POA_CosNotifyComm::StructuredPushConsumer ,
public EventConsumer ,
public omni_thread
{
public :
static NotifdEventConsumer *create();
TANGO_IMP_EXP static void cleanup() {if (_instance != NULL){_instance=NULL;}}
void push_structured_event(const CosNotification::StructuredEvent&);
virtual void cleanup_EventChannel_map();
void disconnect_structured_push_consumer();
void offer_change(const CosNotification::EventTypeSeq &,const CosNotification::EventTypeSeq &);
virtual void get_subscription_command_name(string &cmd) {cmd="EventSubscriptionChange";}
CORBA::ORB_var orb_;
protected :
NotifdEventConsumer(ApiUtil *ptr);
virtual void connect_event_channel(string &,Database *,bool,DeviceData &);
virtual void connect_event_system(string &,string &,string &e,const vector<string> &,EvChanIte &,EventCallBackStruct &,DeviceData &,size_t);
virtual void set_channel_type(EventChannelStruct &ecs) {ecs.channel_type = NOTIFD;}
virtual void zmq_specific(DeviceData &,string &,DeviceProxy *,const string &) {}
private :
TANGO_IMP static NotifdEventConsumer *_instance;
CosNotifyChannelAdmin::EventChannel_var eventChannel;
CosNotifyChannelAdmin::ConsumerAdmin_var consumerAdmin;
CosNotifyChannelAdmin::ProxyID proxyId;
CosNotifyChannelAdmin::ProxySupplier_var proxySupplier;
CosNotifyChannelAdmin::StructuredProxyPushSupplier_var structuredProxyPushSupplier;
CosNotifyChannelAdmin::EventChannelFactory_var eventChannelFactory;
void *run_undetached(void *arg);
};
/********************************************************************************
* *
* ZmqEventConsumer class *
* *
*******************************************************************************/
class ZmqEventConsumer : public EventConsumer ,
public omni_thread
{
public :
static ZmqEventConsumer *create();
TANGO_IMP_EXP static void cleanup() {if (_instance != NULL){_instance=NULL;}}
virtual void cleanup_EventChannel_map();
virtual void get_subscription_command_name(string &cmd) {cmd="ZmqEventSubscriptionChange";}
void get_subscribed_event_ids(DeviceProxy *,vector<int> &);
enum UserDataEventType
{
ATT_CONF = 0,
ATT_READY,
ATT_VALUE,
DEV_INTR,
PIPE
};
enum SocketCmd
{
SUBSCRIBE = 0,
UNSUBSCRIBE
};
protected :
ZmqEventConsumer(ApiUtil *ptr);
virtual void connect_event_channel(string &,Database *,bool,DeviceData &);
virtual void disconnect_event_channel(string &channel_name,string &endpoint,string &endpoint_event);
virtual void connect_event_system(string &,string &,string &e,const vector<string> &,EvChanIte &,EventCallBackStruct &,DeviceData &,size_t);
virtual void disconnect_event(string &,string &);
virtual void set_channel_type(EventChannelStruct &ecs) {ecs.channel_type = ZMQ;}
virtual void zmq_specific(DeviceData &,string &,DeviceProxy *,const string &);
private :
TANGO_IMP static ZmqEventConsumer *_instance;
zmq::context_t zmq_context; // ZMQ context
zmq::socket_t *heartbeat_sub_sock; // heartbeat subscriber socket
zmq::socket_t *control_sock; // control socket
zmq::socket_t *event_sub_sock; // event subscriber socket
map<string,zmq::socket_t *> event_mcast; // multicast socket(s)
vector<string> connected_pub; //
vector<string> connected_heartbeat; //
AttributeValue_var av;
AttributeValue_3_var av3;
ZmqAttributeValue_4 zav4;
ZmqAttributeValue_5 zav5;
AttributeConfig_2_var ac2;
AttributeConfig_3_var ac3;
AttributeConfig_5_var ac5;
AttDataReady_var adr;
DevIntrChange_var dic;
ZmqDevPipeData zdpd;
DevErrorList_var del;
int old_poll_nb;
TangoMonitor subscription_monitor;
omni_mutex sock_bound_mutex;
bool ctrl_socket_bound;
void *run_undetached(void *arg);
void push_heartbeat_event(string &);
void push_zmq_event(string &,unsigned char,zmq::message_t &,bool,const DevULong &);
bool process_ctrl(zmq::message_t &,zmq::pollitem_t *,int &);
void process_heartbeat(zmq::message_t &,zmq::message_t &,zmq::message_t &);
void process_event(zmq::message_t &,zmq::message_t &,zmq::message_t &,zmq::message_t &);
void process_event(zmq_msg_t &,zmq_msg_t &,zmq_msg_t &,zmq_msg_t &);
void multi_tango_host(zmq::socket_t *,SocketCmd,string &);
void print_error_message(const char *mess) {ApiUtil *au=ApiUtil::instance();au->print_error_message(mess);}
void set_ctrl_sock_bound() {sock_bound_mutex.lock();ctrl_socket_bound=true;sock_bound_mutex.unlock();}
bool is_ctrl_sock_bound() {bool _b;sock_bound_mutex.lock();_b=ctrl_socket_bound;sock_bound_mutex.unlock();return _b;}
bool check_zmq_endpoint(const string &);
friend class DelayEvent;
};
class DelayEvent
{
public:
DelayEvent(EventConsumer *);
~DelayEvent();
void release();
private:
bool released;
ZmqEventConsumer *eve_con;
};
/********************************************************************************
* *
* EventConsumerKeepAliveThread class *
* *
*******************************************************************************/
class EventConsumerKeepAliveThread : public omni_thread
{
public :
EventConsumerKeepAliveThread(const EventConsumer&);
EventConsumerKeepAliveThread(KeepAliveThCmd &cmd):shared_cmd(cmd){};
void start() {start_undetached();}
void stateless_subscription_failed(vector<EventNotConnected>::iterator &,DevFailed &,time_t &);
void fwd_not_conected_event(ZmqEventConsumer *);
protected :
KeepAliveThCmd &shared_cmd;
private :
void *run_undetached(void *arg);
bool reconnect_to_channel(EvChanIte &,EventConsumer *);
void reconnect_to_event(EvChanIte &,EventConsumer *);
void re_subscribe_event(EvCbIte &,EvChanIte &);
bool reconnect_to_zmq_channel(EvChanIte &,EventConsumer *,DeviceData &);
void reconnect_to_zmq_event(EvChanIte &,EventConsumer *,DeviceData &);
void not_conected_event(ZmqEventConsumer *,time_t,NotifdEventConsumer *);
void confirm_subscription(ZmqEventConsumer *,map<string,EventChannelStruct>::iterator &);
void main_reconnect(ZmqEventConsumer *,NotifdEventConsumer *,map<string,EventCallBackStruct>::iterator &,map<string,EventChannelStruct>::iterator &);
void re_subscribe_after_reconnect(ZmqEventConsumer *,NotifdEventConsumer *,map<string,EventCallBackStruct>::iterator &,map<string,EventChannelStruct>::iterator &,string &);
};
/********************************************************************************
* *
* DelayedEventUnsubThread class *
* *
*******************************************************************************/
class DelayedEventUnsubThread: public omni_thread
{
public:
DelayedEventUnsubThread(EventConsumer *ec,int id,TangoMonitor *m):omni_thread(),event_id(id),ev_cons(ec),the_mon(m) {}
void run(void *);
private:
int event_id;
EventConsumer *ev_cons;
TangoMonitor *the_mon;
};
/********************************************************************************
* *
* DelayedEventSubThread class *
* *
*******************************************************************************/
class DelayedEventSubThread: public omni_thread
{
public:
DelayedEventSubThread(EventConsumer *ec,DeviceProxy *_device,
const string &_attribute,
EventType _event,
CallBack *_callback,
EventQueue *_ev_queue,
bool _stateless,
const string &_ev_name,
int _id):omni_thread(),ev_cons(ec),device(_device),
attribute(_attribute),et(_event),callback(_callback),ev_queue(_ev_queue),
stateless(_stateless),ev_id(_id),event_name(_ev_name) {}
void run(void *);
private:
EventConsumer *ev_cons;
DeviceProxy *device;
string attribute;
EventType et;
CallBack *callback;
EventQueue *ev_queue;
bool stateless;
int ev_id;
string event_name;
};
} // End of namespace
#endif // _EVENTCONSUMER_H
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