-
Notifications
You must be signed in to change notification settings - Fork 18
/
LoadBalance.cpp
1260 lines (1161 loc) · 45.1 KB
/
LoadBalance.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
///////////////////////////////////////////////////////////////////////////////
/// @file LoadBalance.cpp
///
/// @author Ravi Akella <rcaq5c@mst.edu>
///
/// @project FREEDM DGI
///
/// @description Main file describing power management/load balancing algorithm
///
/// @citations A Distributed Drafting ALgorithm for Load Balancing,
/// Lionel Ni, Chong Xu, Thomas Gendreau, IEEE Transactions on
/// Software Engineering, 1985
///
/// @functions
/// LBAgent
/// Run
/// AddPeer
/// GetPeer
/// SendMsg
/// SendNormal
/// CollectState
/// LoadManage
/// LoadTable
/// SendDraftRequest
/// HandleRead
/// Step_PStar
/// PStar
/// StartStateTimer
/// HandleStateTimer
///
/// These source code files were created at Missouri University of Science and
/// Technology, and are intended for use in teaching or research. They may be
/// freely copied, modified, and redistributed as long as modified versions are
/// clearly marked as such and this notice is not removed. Neither the authors
/// nor Missouri S&T make any warranty, express or implied, nor assume any legal
/// responsibility for the accuracy, completeness, or usefulness of these files
/// or any information distributed with these files.
///
/// Suggested modifications or questions about these files can be directed to
/// Dr. Bruce McMillin, Department of Computer Science, Missouri University of
/// Science and Technology, Rolla, MO 65409 <ff@mst.edu>.
////////////////////////////////////////////////////////////////////////////////
#include "LoadBalance.hpp"
#include "CLogger.hpp"
#include "CMessage.hpp"
#include "gm/GroupManagement.hpp"
#include "CDeviceManager.hpp"
#include "CTimings.hpp"
#include "dnp3/DNP3Slave.hpp"
#include "CGlobalConfiguration.hpp"
#include <algorithm>
#include <cassert>
#include <cstdlib>
#include <exception>
#include <fstream>
#include <iomanip>
#include <set>
#include <string>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <boost/foreach.hpp>
#include <boost/function.hpp>
#include <boost/property_tree/ptree.hpp>
#include <boost/range/adaptor/map.hpp>
using boost::property_tree::ptree;
namespace freedm {
namespace broker {
namespace lb {
const int P_Migrate = 1;
namespace {
/// This file's logger.
CLocalLogger Logger(__FILE__);
}
///////////////////////////////////////////////////////////////////////////////
/// LBAgent
/// @description: Constructor for the load balancing module
/// @pre: Posix Main should register read handler and invoke this module
/// @post: Object is initialized and ready to run load balancing
/// @param uuid_: This object's uuid
/// @param broker: The Broker
/// @limitations: None
///////////////////////////////////////////////////////////////////////////////
LBAgent::LBAgent(std::string uuid_, CBroker &broker):
IPeerNode(uuid_, broker.GetConnectionManager()),
m_broker(broker)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
PeerNodePtr self_ = CGlobalPeerList::instance().GetPeer(uuid_);
InsertInPeerSet(m_AllPeers, self_);
m_Leader = GetUUID();
m_Normal = 0;
m_GlobalTimer = broker.AllocateTimer("lb");
m_StateTimer = broker.AllocateTimer("lb");
RegisterSubhandle("any.PeerList",boost::bind(&LBAgent::HandlePeerList, this, _1, _2));
RegisterSubhandle("lb.demand",boost::bind(&LBAgent::HandleDemand, this, _1, _2));
RegisterSubhandle("lb.normal",boost::bind(&LBAgent::HandleNormal, this, _1, _2));
RegisterSubhandle("lb.supply",boost::bind(&LBAgent::HandleSupply, this, _1, _2));
RegisterSubhandle("lb.request",boost::bind(&LBAgent::HandleRequest, this, _1, _2));
RegisterSubhandle("lb.yes",boost::bind(&LBAgent::HandleYes, this, _1, _2));
RegisterSubhandle("lb.no",boost::bind(&LBAgent::HandleNo, this, _1, _2));
RegisterSubhandle("lb.drafting",boost::bind(&LBAgent::HandleDrafting, this, _1, _2));
RegisterSubhandle("lb.accept",boost::bind(&LBAgent::HandleAccept, this, _1, _2));
RegisterSubhandle("lb.CollectedState",boost::bind(&LBAgent::HandleCollectedState, this, _1, _2));
RegisterSubhandle("lb.ComputedNormal",boost::bind(&LBAgent::HandleComputedNormal, this, _1, _2));
RegisterSubhandle("any",boost::bind(&LBAgent::HandleAny, this, _1, _2));
m_sstExists = false;
}
///////////////////////////////////////////////////////////////////////////////
/// ~LBAgent
/// @description: Class desctructor
/// @pre: None
/// @post: The object is ready to be destroyed.
///////////////////////////////////////////////////////////////////////////////
LBAgent::~LBAgent()
{
}
////////////////////////////////////////////////////////////
/// LB
/// @description Main function which initiates the algorithm
/// @pre: Posix Main should invoke this function
/// @post: Triggers the drafting algorithm by calling LoadManage()
/// @limitations None
/////////////////////////////////////////////////////////
int LBAgent::Run()
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
// This initializes the algorithm
LoadManage();
StartStateTimer( CTimings::LB_STATE_TIMER );
return 0;
}
////////////////////////////////////////////////////////////
/// AddPeer
/// @description Adds the peer to the set of all peers
/// @pre: This module should have received the list of peers in the group from leader
/// @post: Peer set is populated with a pointer to the added node
/// @limitations Addition of new peers is strictly based on group membership
/////////////////////////////////////////////////////////
LBAgent::PeerNodePtr LBAgent::AddPeer(PeerNodePtr peer)
{
InsertInPeerSet(m_AllPeers,peer);
InsertInPeerSet(m_NoNodes,peer);
return peer;
}
////////////////////////////////////////////////////////////
/// GetPeer
/// @description Returns the pointer to a peer from the set of all peers
/// @pre: none
/// @post: Returns a pointer to the requested peer, if exists
/// @limitations Limited to members in this group
/////////////////////////////////////////////////////////
LBAgent::PeerNodePtr LBAgent::GetPeer(std::string uuid)
{
PeerSet::iterator it = m_AllPeers.find(uuid);
if(it != m_AllPeers.end())
{
return it->second;
}
else
{
return PeerNodePtr();
}
}
////////////////////////////////////////////////////////////
/// SendMsg
/// @description Prepares a generic message and sends to a specific group
/// @pre: The caller passes the message to be sent, as a string
/// @post: Message is prepared and sent
/// @param msg: The message to be sent
/// @param peerSet_: The group of peers that should receive the message
/// @peers Each peer that exists in the peerSet_
/// @ErrorHandling If the message cannot be sent, an exception is thrown and the
/// process continues
/// @limitations Group should be a PeerSet
/////////////////////////////////////////////////////////
void LBAgent::SendMsg(std::string msg, PeerSet peerSet_)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
CMessage m_;
m_.m_submessages.put("lb.source", GetUUID());
m_.SetHandler("lb."+ msg);
Logger.Notice << "Sending '" << msg << "' from: "
<< m_.m_submessages.get<std::string>("lb.source") << std::endl;
BOOST_FOREACH( PeerNodePtr peer, peerSet_ | boost::adaptors::map_values)
{
if( peer->GetUUID() == GetUUID())
{
continue;
}
else
{
try
{
peer->Send(m_);
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't Send Message To Peer" << std::endl;
}
}
}
}
////////////////////////////////////////////////////////////
/// SendNormal
/// @description Compute Normal if you are the Leader and push
/// it to the group members
/// @pre: You should be the leader and you should have called StateNormalize()
/// prior to this
/// @post: The group members are sent the computed normal
/// @param Normal: The value of normal to be sent to the group memebers
/// @peers Each peer that exists in the peer set, m_AllPeers
/// @ErrorHandling If the message cannot be sent, an exception is thrown and the
/// process continues
/// @limitations None
/////////////////////////////////////////////////////////
void LBAgent::SendNormal(double Normal)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(m_Leader == GetUUID())
{
Logger.Status <<"Sending Computed Normal to the group members" <<std::endl;
CMessage m_;
m_.m_submessages.put("lb.source", GetUUID());
m_.SetHandler("lb.ComputedNormal");
m_.m_submessages.put("lb.cnorm", boost::lexical_cast<std::string>(Normal));
BOOST_FOREACH( PeerNodePtr peer, m_AllPeers | boost::adaptors::map_values)
{
try
{
peer->Send(m_);
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't Send Message To Peer" << std::endl;
}
}//end foreach
}
}
////////////////////////////////////////////////////////////
/// CollectState
/// @description Prepares and sends a state collection request to SC
/// @pre: Called only on state timeout or when you are the new leader
/// @post: SC module receives the request and initiates state collection
/// @peers This node (SC module)
/// @ErrorHandling If the message cannot be sent, an exception
/// is thrown and the process continues
/// @limitations
/// TODO: Have a generic request message with exact entity to be included in
/// state collection; eg., LB requests gateways only.
/////////////////////////////////////////////////////////
void LBAgent::CollectState()
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
CMessage m_cs;
m_cs.SetHandler("sc.request");
m_cs.m_submessages.put("sc.source", GetUUID());
m_cs.m_submessages.put("sc.module", "lb");
/*
//for only one device
m_cs.m_submessages.put("sc.deviceType", "Sst");
m_cs.m_submessages.put("sc.valueType", "gateway");
*/
//for multiple devices
m_cs.m_submessages.put("sc.deviceNum", 4);
//SST device
ptree subPtree1;
subPtree1.add("deviceType", "Sst");
subPtree1.add("valueType", "gateway");
m_cs.m_submessages.add_child("sc.devices.device", subPtree1);
//DRER device
ptree subPtree2;
subPtree2.add("deviceType", "Drer");
subPtree2.add("valueType", "generation");
m_cs.m_submessages.add_child("sc.devices.device", subPtree2);
//LOAD device
ptree subPtree3;
subPtree3.add("deviceType", "Load");
subPtree3.add("valueType", "drain");
m_cs.m_submessages.add_child("sc.devices.device", subPtree3);
//FID device
ptree subPtree4;
subPtree4.add("deviceType", "Fid");
subPtree4.add("valueType", "state");
m_cs.m_submessages.add_child("sc.devices.device", subPtree4);
try
{
GetPeer(GetUUID())->Send(m_cs);
Logger.Status << "LB module requested State Collection" << std::endl;
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't Send Message To Peer" << std::endl;
}
}
////////////////////////////////////////////////////////////
/// LoadManage
/// @description: Manages the execution of the load balancing algorithm by
/// broadcasting load changes computed by LoadTable() and
/// initiating SendDraftRequest() if in Supply
/// @pre: Node is not in Fail state
/// @post: Load state change is monitored, specific load changes are
/// advertised to peers and restarts on timeout
/// @peers All peers in case of Demand state and transition to Normal from
/// Demand;
/// @limitations
/////////////////////////////////////////////////////////
void LBAgent::LoadManage()
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
// Schedule the NEXT LB before starting this one. So ensure that after this
// LB completes, there's still time to run another before scheduling it.
// Otherwise we'll steal time from the next broker module.
if (m_broker.TimeRemaining() >
boost::posix_time::milliseconds(2*CTimings::LB_GLOBAL_TIMER))
{
m_broker.Schedule(m_GlobalTimer,
boost::posix_time::milliseconds(
CTimings::LB_GLOBAL_TIMER),
boost::bind(&LBAgent::LoadManage,
this,
boost::asio::placeholders::error));
Logger.Info << "Scheduled another LoadManage in "
<< CTimings::LB_GLOBAL_TIMER << "ms" << std::endl;
}
else
{
// Schedule past the end of our phase so control will pass to the broker
// after this LB, and we won't go again until it's our turn.
// FIXME - This should be using LB_GLOBAL_TIMER not the state timer,
// but it's pointless to fix it now because Issue #146
m_broker.Schedule(m_GlobalTimer,
boost::posix_time::milliseconds(
CTimings::LB_STATE_TIMER),
boost::bind(&LBAgent::LoadManage,
this,
boost::asio::placeholders::error));
Logger.Info << "Won't run over phase, scheduling another LoadManage in "
<< CTimings::LB_STATE_TIMER << "ms" << std::endl;
}
//Remember previous load before computing current load
m_prevStatus = m_Status;
//Call LoadTable to update load state of the system as observed by this node
LoadTable();
//Send Demand message when the current state is Demand
//NOTE: (changing the original architecture in which Demand broadcast is done
//only when the Normal->Demand or Demand->Normal cases happen)
if (LBAgent::DEMAND == m_Status)
{
// Create Demand message and send it to all nodes
SendMsg("demand", m_AllPeers);
}
//On load change from Demand to Normal, broadcast the change
else if (LBAgent::DEMAND == m_prevStatus && LBAgent::NORM == m_Status)
{
// Create Normal message and send it to all nodes
SendMsg("normal", m_AllPeers);
}
// If you are in Supply state
else if (LBAgent::SUPPLY == m_Status)
{
//initiate draft request
SendDraftRequest();
}
}//end LoadManage
////////////////////////////////////////////////////////////
/// LoadManage
/// @description: Overloaded function of LoadManage
/// @pre: Timer expired, sending an error code
/// @post: Restarts the timer
/// @param err: Error associated with calling timer
/////////////////////////////////////////////////////////
void LBAgent::LoadManage( const boost::system::error_code& err )
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(!err)
{
LoadManage();
}
else if(boost::asio::error::operation_aborted == err )
{
Logger.Info << "LoadManage(operation_aborted error) " << __LINE__
<< std::endl;
}
else
{
// An error occurred or timer was canceled
Logger.Error << err << std::endl;
throw boost::system::system_error(err);
}
}
////////////////////////////////////////////////////////////
/// Dnp3Update
/// @description Updates the values for one device using the DNP3Slave
/// @pre None
/// @post Updates the buffered values for the device
/// @param devid The identifier for the device in the device manager
/// @param index The index for the device in the DNP3 buffer
/// @limitations The DNP3 buffer is not flushed during this call
////////////////////////////////////////////////////////////
void LBAgent::Dnp3Update(std::string devid, unsigned int index)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
device::IDevice::Pointer dev = device::CDeviceManager::Instance().GetDevice(devid);
device::CDeviceDesd::Pointer desd = device::device_cast<device::CDeviceDesd>(dev);
if( !dev || !desd )
{
DNP3Slave::Instance().Update(index, 0);
}
else
{
DNP3Slave::Instance().Update(index++, 1);
DNP3Slave::Instance().Update(index++, desd->GetCurrent());
DNP3Slave::Instance().Update(index++, desd->GetV1());
DNP3Slave::Instance().Update(index++, desd->GetV2());
DNP3Slave::Instance().Update(index++, desd->GetV3());
DNP3Slave::Instance().Update(index++, desd->GetV4());
DNP3Slave::Instance().Update(index++, desd->GetT1());
DNP3Slave::Instance().Update(index++, desd->GetT2());
DNP3Slave::Instance().Update(index++, desd->GetT3());
DNP3Slave::Instance().Update(index++, desd->GetT4());
DNP3Slave::Instance().Update(index++, desd->GetSoc1());
DNP3Slave::Instance().Update(index++, desd->GetSoc2());
DNP3Slave::Instance().Update(index++, desd->GetSoc3());
DNP3Slave::Instance().Update(index++, desd->GetSoc4());
}
}
////////////////////////////////////////////////////////////
/// LoadTable
/// @description Reads values from attached physical devices via the physical
/// device manager, determines the demand state of this node
/// and prints the load table
/// @pre: LoadManage calls this function
/// @post: Aggregate attributes are computed, new demand state is determined and
/// demand states of peers are printed
/// @limitations Some entries in Load table could become stale relative to the
/// global state. The definition of Supply/Normal/Demand could
/// change in future
/////////////////////////////////////////////////////////
void LBAgent::LoadTable()
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
using namespace device;
// device typedef for convenience
typedef CDeviceDrer DRER;
typedef CDeviceDesd DESD;
typedef CDeviceLoad LOAD;
typedef CDeviceSst SST;
int numDRERs = CDeviceManager::Instance().GetDevicesOfType<DRER>().size();
int numDESDs = CDeviceManager::Instance().GetDevicesOfType<DESD>().size();
int numLOADs = CDeviceManager::Instance().GetDevicesOfType<LOAD>().size();
int numSSTs = CDeviceManager::Instance().GetDevicesOfType<SST>().size();
int numDevices = CDeviceManager::Instance().DeviceCount();
m_Gen = CDeviceManager::Instance().GetNetValue<DRER>(&DRER::GetGeneration);
m_Storage = CDeviceManager::Instance().GetNetValue<DESD>(&DESD::GetStorage);
m_Load = CDeviceManager::Instance().GetNetValue<LOAD>(&LOAD::GetLoad);
m_SstGateway = CDeviceManager::Instance().GetNetValue<SST>(&SST::GetGateway);
if (numSSTs >= 1)
{
m_sstExists = true;
// FIXME should consider other devices
m_NetGateway = m_SstGateway;
}
else
{
m_sstExists = false;
// FIXME should consider Gateway
m_NetGateway = m_Load - m_Gen - m_Storage;
}
std::string prefix = CGlobalConfiguration::instance().GetDnp3Prefix();
Dnp3Update(prefix+":1", 1);
Dnp3Update(prefix+":2", 16);
Dnp3Update(prefix+":3", 31);
DNP3Slave::Instance().Flush();
typedef CDeviceLogger LOGGER;
std::multiset<LOGGER::Pointer> LSet;
LSet = device::CDeviceManager::Instance().GetDevicesOfType<LOGGER>();
if( !LSet.empty() )
{
(*LSet.begin())->SetGateway(m_NetGateway);
(*LSet.begin())->SetDeviceCount(numDevices);
}
// used to ensure three digits before the decimal, two after
unsigned int genWidth = (m_Gen > 0 ? 6 : 7);
unsigned int storageWidth = (m_Storage > 0 ? 6 : 7);
unsigned int loadWidth = (m_Load > 0 ? 6 : 7);
unsigned int sstGateWidth = (m_SstGateway > 0 ? 6 : 7);
std::string extraGenSpace = (genWidth == 6 ? " " : "");
std::string extraStorageSpace = (storageWidth == 6 ? " " : "");
std::string extraLoadSpace = (loadWidth == 6 ? " " : "");
std::string extraSstSpace = (sstGateWidth == 6 ? " " : "");
std::stringstream ss;
ss << std::setprecision(2) << std::fixed;
ss << " ----------- LOAD TABLE (Power Management) ------------"
<< std::endl;
ss << "\t| " << "Net DRER (" << std::setfill('0') << std::setw(2)
<< numDRERs << "): " << extraGenSpace << std::setfill(' ')
<< std::setw(genWidth) << m_Gen << " Net DESD ("
<< std::setfill('0') << std::setw(2) << numDESDs << "): "
<< extraStorageSpace << std::setfill(' ') << std::setw(storageWidth)
<< m_Storage << " |" << std::endl;
ss << "\t| " << "Net Load (" << std::setfill('0') << std::setw(2)
<< numLOADs << "): " << extraLoadSpace << std::setfill(' ')
<< std::setw(loadWidth) << m_Load << " SST Gateway ("
<< std::setfill('0') << std::setw(2) << numSSTs << "): "
<< extraSstSpace << std::setfill(' ') << std::setw(sstGateWidth)
<< m_SstGateway << " |" << std::endl;
//
// We will hide Overall Gateway for the time being as it is useless until
// we properly support multiple device LBs.
//
// ss << "\t| Normal: " << m_Normal << " Overall Gateway: "
// << m_NetGateway << " |" << std::endl;
ss << "\t| Normal: " << std::setw(7) << m_Normal << std::setfill(' ')
<< std::setw(32) << "|" << std::endl;
ss << "\t| ---------------------------------------------------- |"
<< std::endl;
//
ss << "\t| " << std::setw(20) << "Node" << std::setw(27) << "State"
<< std::setw(7) << "|" << std::endl;
ss << "\t| " << std::setw(20) << "----" << std::setw(27) << "-----"
<< std::setw(7) << "|" << std::endl;
bool isActive = (m_sstExists || numDESDs > 0);
//Compute the Load state based on the current gateway value and Normal
if(isActive && m_NetGateway < m_Normal - NORMAL_TOLERANCE)
{
m_Status = LBAgent::SUPPLY;
}
else if(isActive && m_NetGateway > m_Normal + NORMAL_TOLERANCE)
{
m_Status = LBAgent::DEMAND;
m_DemandVal = m_SstGateway-m_Normal;
}
else
{
m_Status = LBAgent::NORM;
}
//Update info about this node in the load table based on above computation
BOOST_FOREACH( PeerNodePtr self_, m_AllPeers | boost::adaptors::map_values)
{
if( self_->GetUUID() == GetUUID())
{
EraseInPeerSet(m_LoNodes,self_);
EraseInPeerSet(m_HiNodes,self_);
EraseInPeerSet(m_NoNodes,self_);
if (LBAgent::SUPPLY == m_Status)
{
InsertInPeerSet(m_LoNodes,self_);
}
else if (LBAgent::NORM == m_Status)
{
InsertInPeerSet(m_NoNodes,self_);
}
else if (LBAgent::DEMAND == m_Status)
{
InsertInPeerSet(m_HiNodes,self_);
}
}
}
//Print the load information you have about the rest of the system
BOOST_FOREACH( PeerNodePtr p, m_AllPeers | boost::adaptors::map_values)
{
std::string centeredUUID = p->GetUUID();
std::string pad = " ";
if (centeredUUID.size() >= 36)
{
centeredUUID.erase(35);
pad = "... ";
}
else
{
unsigned int padding = (36 - centeredUUID.length())/2;
centeredUUID.insert(0, padding, ' ');
if (p->GetUUID().size()%2 == 0)
{
padding--;
}
centeredUUID.append(padding, ' ');
}
ss.setf(std::ios::internal, std::ios::adjustfield);
if (CountInPeerSet(m_HiNodes,p) > 0 )
{
ss << "\t| " << centeredUUID << pad << "Demand |" << std::endl;
}
else if (CountInPeerSet(m_NoNodes,p) > 0 )
{
ss << "\t| " << centeredUUID << pad << "Normal |" << std::endl;
}
else if (CountInPeerSet(m_LoNodes,p) > 0 )
{
ss << "\t| " << centeredUUID << pad << "Supply |" << std::endl;
}
else
{
ss << "\t| " << centeredUUID << pad << "------ |" << std::endl;
}
}
ss << "\t ------------------------------------------------------";
Logger.Status << ss.str() << std::endl;
}//end LoadTable
////////////////////////////////////////////////////////////
/// SendDraftRequest
/// @description Advertise willingness to share load whenever you can supply
/// @pre: Current load state of this node is 'Supply'
/// @post: Send "request" message to peers in demand state
/// @limitations Currently broadcasts request to all the entries in the list of
/// demand nodes.
/////////////////////////////////////////////////////////
void LBAgent::SendDraftRequest()
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(LBAgent::SUPPLY == m_Status)
{
if(m_HiNodes.empty())
{
Logger.Notice << "No known Demand nodes at the moment" <<std::endl;
}
else
{
//Create new request and send it to all DEMAND nodes
SendMsg("request", m_HiNodes);
}//end else
}//end if
}//end SendDraftRequest
#pragma GCC diagnostic ignored "-Wunused-parameter"
////////////////////////////////////////////////////////////
/// HandleRead
/// @description: Handles the incoming messages meant for lb module and performs
/// action accordingly
/// @pre: The message obtained as ptree should be intended for this module
/// @post: The sender of the message always gets a response from this node
/// @return: Multiple objectives depending on the message received and
/// power migration on successful negotiation
/// @param msg: The message dispatched by broker read handler
/// @param peer
/// @peers The members of the group or a subset of, from whom message was received
/// @limitations:
/////////////////////////////////////////////////////////
void LBAgent::HandleAny(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
PeerSet tempSet_;
MessagePtr m_;
std::string line_;
std::stringstream ss_;
line_ = msg->GetSourceUUID();
ptree &pt = msg->GetSubMessages();
Logger.Debug << "Message '" <<pt.get<std::string>("lb","NOEXECPTION")
<<"' received from "<< line_<<std::endl;
if(msg->GetHandler().find("lb") == 0)
{
Logger.Error<<"Unhandled Load Balancing Message"<<std::endl;
msg->Save(Logger.Error);
Logger.Error<<std::endl;
throw std::runtime_error("Unhandled Load Balancing Message");
}
}
void LBAgent::HandlePeerList(MessagePtr msg, PeerNodePtr peer)
{
// --------------------------------------------------------------
// If you receive a peerList from your new leader, process it and
// identify your new group members
// --------------------------------------------------------------
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
PeerSet temp;
Logger.Notice << "\nPeer List received from Group Leader: " << peer->GetUUID() <<std::endl;
m_Leader = peer->GetUUID();
if(m_Leader == GetUUID())
{
//Initiate state collection if you are the leader
//CollectState();
}
//Update the PeerNode lists accordingly
//TODO:Not sure if similar loop is needed to erase each peerset
//individually. peerset.clear() doesn`t work for obvious reasons
BOOST_FOREACH( PeerNodePtr p_, m_AllPeers | boost::adaptors::map_values)
{
if( p_->GetUUID() == GetUUID())
{
continue;
}
EraseInPeerSet(m_AllPeers,p_);
//Assuming that any node in m_AllPeers exists in one of the following
EraseInPeerSet(m_HiNodes,p_);
EraseInPeerSet(m_LoNodes,p_);
EraseInPeerSet(m_NoNodes,p_);
}
temp = gm::GMAgent::ProcessPeerList(msg,GetConnectionManager());
BOOST_FOREACH( PeerNodePtr p_, temp | boost::adaptors::map_values )
{
if(CountInPeerSet(m_AllPeers,p_) == 0)
{
AddPeer(p_);
}
}
}
void LBAgent::HandleDemand(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
// --------------------------------------------------------------
// You received a Demand message from the source
// --------------------------------------------------------------
if(peer->GetUUID() == GetUUID())
return;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
ptree &pt = msg->GetSubMessages();
Logger.Notice << "Demand message received from: "
<< pt.get<std::string>("lb.source") <<std::endl;
EraseInPeerSet(m_HiNodes,peer);
EraseInPeerSet(m_NoNodes,peer);
EraseInPeerSet(m_LoNodes,peer);
InsertInPeerSet(m_HiNodes,peer);
}
void LBAgent::HandleNormal(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
if(peer->GetUUID() == GetUUID())
return;
// --------------------------------------------------------------
// You received a Load change of source to Normal state
// --------------------------------------------------------------
ptree &pt = msg->GetSubMessages();
Logger.Notice << "Normal message received from: "
<< pt.get<std::string>("lb.source") <<std::endl;
EraseInPeerSet(m_NoNodes,peer);
EraseInPeerSet(m_HiNodes,peer);
EraseInPeerSet(m_LoNodes,peer);
InsertInPeerSet(m_NoNodes,peer);
}
void LBAgent::HandleSupply(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
if(peer->GetUUID() == GetUUID())
return;
// --------------------------------------------------------------
// You received a message saying the source is in Supply state, which means
// you are (were, recently) in Demand state; else you would not have received
// --------------------------------------------------------------
ptree &pt = msg->GetSubMessages();
Logger.Notice << "Supply message received from: "
<< pt.get<std::string>("lb.source") <<std::endl;
EraseInPeerSet(m_LoNodes,peer);
EraseInPeerSet(m_HiNodes,peer);
EraseInPeerSet(m_NoNodes,peer);
InsertInPeerSet(m_LoNodes,peer);
}
#pragma GCC diagnostic ignored "-Wunused-parameter"
void LBAgent::HandleRequest(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
// --------------------------------------------------------------
// You received a draft request
// --------------------------------------------------------------
if(peer->GetUUID() == GetUUID())
return;
Logger.Notice << "Request message received from: " << peer->GetUUID() << std::endl;
// Just not to duplicate the peer, erase the existing entries of it
EraseInPeerSet(m_LoNodes,peer);
EraseInPeerSet(m_HiNodes,peer);
EraseInPeerSet(m_NoNodes,peer);
// Insert into set of Supply nodes
InsertInPeerSet(m_LoNodes,peer);
// Create your response to the Draft request sent by the source
CMessage m_;
m_.m_submessages.put("lb.source", GetUUID());
std::stringstream ss_;
// If you are in Demand State, accept the request with a 'yes'
if(LBAgent::DEMAND == m_Status)
{
ss_.clear();
ss_.str("yes");
m_.SetHandler("lb."+ ss_.str());
}
// Otherwise, inform the source that you are not interested
// NOTE: This may change in future when we incorporate advanced economics
else
{
ss_.clear();
ss_.str("no");
m_.SetHandler("lb."+ ss_.str());
}
// Send your response
if( peer->GetUUID() != GetUUID())
{
try
{
peer->Send(m_);
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't Send Message To Peer" << std::endl;
}
}
}
void LBAgent::HandleYes(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
// --------------------------------------------------------------
// You received a response from source, to your draft request
// --------------------------------------------------------------
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
if(peer->GetUUID() == GetUUID())
return;
Logger.Notice << "(Yes) from " << peer->GetUUID() << std::endl;
//Initiate drafting with a message accordingly
//TODO: Selection of node that you are drafting with needs to be performed
// Currently, whoever responds to draft request gets the slice
CMessage m_;
m_.m_submessages.put("lb.source", GetUUID());
std::stringstream ss_;
ss_.clear();
ss_.str("drafting");
m_.SetHandler("lb."+ ss_.str());
//Its better to check your status again before initiating drafting
if( peer->GetUUID() != GetUUID() && LBAgent::SUPPLY == m_Status )
{
try
{
peer->Send(m_);
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't send Message To Peer" << std::endl;
}
}
}
void LBAgent::HandleNo(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
if(peer->GetUUID() == GetUUID())
return;
Logger.Notice << "(No) from " << peer->GetUUID() << std::endl;
}
void LBAgent::HandleDrafting(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
// --------------------------------------------------------------
//You received a Drafting message in reponse to your Demand
//Ackowledge by sending an 'Accept' message
// --------------------------------------------------------------
if(peer->GetUUID() == GetUUID())
return;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
Logger.Notice << "Drafting message received from: " << peer->GetUUID() << std::endl;
if(LBAgent::DEMAND == m_Status)
{
CMessage m_;
m_.m_submessages.put("lb.source", GetUUID());
std::stringstream ss_;
ss_.clear();
ss_.str("accept");
m_.SetHandler("lb."+ ss_.str());
ss_.clear();
//TODO: Demand cost should be sent with draft response (yes/no) so
// that the supply node can select
ss_ << m_DemandVal;
m_.m_submessages.put("lb.value", ss_.str());
if( peer->GetUUID() != GetUUID() && LBAgent::DEMAND == m_Status )
{
try
{
peer->Send(m_);
}
catch (boost::system::system_error& e)
{
Logger.Info << "Couldn't Send Message To Peer" << std::endl;
}
// Make necessary power setting accordingly to allow power migration
// !!!NOTE: You may use Step_PStar() or PStar(m_DemandVal) currently
if (m_sstExists)
Step_PStar();
else
Desd_PStar();
}
else
{
//Nothing; Local Load change from Demand state (Migration will not proceed)
}
}
}
void LBAgent::HandleAccept(MessagePtr msg, PeerNodePtr peer)
{
Logger.Trace << __PRETTY_FUNCTION__ << std::endl;
if(peer->GetUUID() == GetUUID())
return;
if(CountInPeerSet(m_AllPeers,peer) == 0)
return;
// --------------------------------------------------------------
// The Demand node you agreed to supply power to, is awaiting migration
// --------------------------------------------------------------
device::SignalValue DemValue;
std::stringstream ss_;
ptree &pt = msg->GetSubMessages();
ss_ << pt.get<std::string>("lb.value");
ss_ >> DemValue;
Logger.Notice << " Draft Accept message received from: " << peer->GetUUID()
<< " with demand of "<< DemValue << std::endl;
if( LBAgent::SUPPLY == m_Status)
{
// Make necessary power setting accordingly to allow power migration
Logger.Warn<<"Migrating power on request from: "<< peer->GetUUID() << std::endl;
// !!!NOTE: You may use Step_PStar() or PStar(DemandValue) currently
if (m_sstExists)
Step_PStar();
else
Desd_PStar();
}//end if( LBAgent::SUPPLY == m_Status)
else