/
service.go
144 lines (126 loc) · 4.95 KB
/
service.go
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
// Copyright © 2021 Weald Technology Trading.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package individual
import (
"context"
"time"
execclient "github.com/attestantio/go-execution-client"
"github.com/pkg/errors"
"github.com/rs/zerolog"
zerologger "github.com/rs/zerolog/log"
"github.com/wealdtech/execd/services/execdb"
"github.com/wealdtech/execd/services/scheduler"
"golang.org/x/sync/semaphore"
)
// Service is a chain database service.
type Service struct {
scheduler scheduler.Service
chainHeightProvider execclient.ChainHeightProvider
blocksProvider execclient.BlocksProvider
blockReplaysProvider execclient.BlockReplaysProvider
issuanceProvider execclient.IssuanceProvider
transactionReceiptsProvider execclient.TransactionReceiptsProvider
blocksSetter execdb.BlocksSetter
transactionsSetter execdb.TransactionsSetter
transactionStateDiffsSetter execdb.TransactionStateDiffsSetter
eventsSetter execdb.EventsSetter
trackDistance uint32
activitySem *semaphore.Weighted
enableTransactions bool
enableTransactionEvents bool
enableBalanceChanges bool
enableStorageChanges bool
interval time.Duration
}
// module-wide log.
var log zerolog.Logger
// New creates a new service.
func New(ctx context.Context, params ...Parameter) (*Service, error) {
parameters, err := parseAndCheckParameters(params...)
if err != nil {
return nil, errors.Wrap(err, "problem with parameters")
}
// Set logging.
log = zerologger.With().Str("service", "blocks").Str("impl", "individual").Logger().Level(parameters.logLevel)
if err := registerMetrics(ctx, parameters.monitor); err != nil {
return nil, errors.New("failed to register metrics")
}
s := &Service{
scheduler: parameters.scheduler,
chainHeightProvider: parameters.chainHeightProvider,
blocksProvider: parameters.blocksProvider,
blockReplaysProvider: parameters.blockReplaysProvider,
issuanceProvider: parameters.issuanceProvider,
transactionReceiptsProvider: parameters.transactionReceiptsProvider,
blocksSetter: parameters.blocksSetter,
transactionsSetter: parameters.transactionsSetter,
transactionStateDiffsSetter: parameters.transactionStateDiffsSetter,
eventsSetter: parameters.eventsSetter,
trackDistance: parameters.trackDistance,
activitySem: semaphore.NewWeighted(1),
enableTransactions: parameters.enableTransactions,
enableTransactionEvents: parameters.enableTransactionEvents,
enableBalanceChanges: parameters.enableBalanceChanges,
enableStorageChanges: parameters.enableStorageChanges,
interval: parameters.interval,
}
// Update to current block before starting (in the background).
go s.updateOnRestart(ctx, parameters.startHeight)
return s, nil
}
func (s *Service) updateOnRestart(ctx context.Context, startHeight int64) {
// Work out the slot from which to start.
md, err := s.getMetadata(ctx)
if err != nil {
log.Fatal().Err(err).Msg("Failed to obtain metadata before catchup")
}
if startHeight >= 0 {
// Explicit requirement to start at a given height.
// Subtract one to state that the block higher than the required start is the last processed.
md.LatestHeight = startHeight - 1
}
log.Info().Int64("height", md.LatestHeight).Msg("Catching up from slot")
s.catchup(ctx, md)
log.Info().Msg("Caught up; starting periodic update")
runtimeFunc := func(ctx context.Context, data interface{}) (time.Time, error) {
return time.Now().Add(s.interval), nil
}
if err := s.scheduler.SchedulePeriodicJob(ctx,
"Updates",
"Block updates",
runtimeFunc,
nil,
s.updateOnScheduleTick,
nil,
); err != nil {
log.Fatal().Err(err).Msg("Failed to schedule block updates.")
}
}
func (s *Service) updateOnScheduleTick(ctx context.Context, data interface{}) {
// Only allow 1 handler to be active.
acquired := s.activitySem.TryAcquire(1)
if !acquired {
log.Debug().Msg("Another handler running")
return
}
defer s.activitySem.Release(1)
// Work out the slot from which to start.
md, err := s.getMetadata(ctx)
if err != nil {
log.Error().Err(err).Msg("Failed to obtain metadata for update")
return
}
log.Trace().Int64("height", md.LatestHeight).Msg("Catching up from slot")
s.catchup(ctx, md)
log.Trace().Msg("Caught up")
}