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
|
// Copyright (C) 2016 The Android Open Source Project
//
// 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 com.google.gerrit.server.notedb;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.metrics.Description;
import com.google.gerrit.metrics.Description.Units;
import com.google.gerrit.metrics.Field;
import com.google.gerrit.metrics.MetricMaker;
import com.google.gerrit.metrics.Timer2;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.config.AllUsersName;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.logging.Metadata;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.jgit.lib.Config;
@Singleton
public class Sequences {
private static final String SECTION_NOTEDB = "noteDb";
private static final String KEY_SEQUENCE_BATCH_SIZE = "sequenceBatchSize";
private static final int DEFAULT_ACCOUNTS_SEQUENCE_BATCH_SIZE = 1;
private static final int DEFAULT_CHANGES_SEQUENCE_BATCH_SIZE = 20;
public static final String NAME_ACCOUNTS = "accounts";
public static final String NAME_GROUPS = "groups";
public static final String NAME_CHANGES = "changes";
public static final int FIRST_ACCOUNT_ID = 1000000;
public static final int FIRST_GROUP_ID = 1;
public static final int FIRST_CHANGE_ID = 1;
private enum SequenceType {
ACCOUNTS,
CHANGES,
GROUPS;
}
private final RepoSequence accountSeq;
private final RepoSequence changeSeq;
private final RepoSequence groupSeq;
private final Timer2<SequenceType, Boolean> nextIdLatency;
@Inject
public Sequences(
@GerritServerConfig Config cfg,
GitRepositoryManager repoManager,
GitReferenceUpdated gitRefUpdated,
AllProjectsName allProjects,
AllUsersName allUsers,
MetricMaker metrics) {
int accountBatchSize =
cfg.getInt(
SECTION_NOTEDB,
NAME_ACCOUNTS,
KEY_SEQUENCE_BATCH_SIZE,
DEFAULT_ACCOUNTS_SEQUENCE_BATCH_SIZE);
accountSeq =
new RepoSequence(
repoManager,
gitRefUpdated,
allUsers,
NAME_ACCOUNTS,
() -> FIRST_ACCOUNT_ID,
accountBatchSize);
int changeBatchSize =
cfg.getInt(
SECTION_NOTEDB,
NAME_CHANGES,
KEY_SEQUENCE_BATCH_SIZE,
DEFAULT_CHANGES_SEQUENCE_BATCH_SIZE);
changeSeq =
new RepoSequence(
repoManager,
gitRefUpdated,
allProjects,
NAME_CHANGES,
() -> FIRST_CHANGE_ID,
changeBatchSize);
int groupBatchSize = 1;
groupSeq =
new RepoSequence(
repoManager,
gitRefUpdated,
allUsers,
NAME_GROUPS,
() -> FIRST_GROUP_ID,
groupBatchSize);
nextIdLatency =
metrics.newTimer(
"sequence/next_id_latency",
new Description("Latency of requesting IDs from repo sequences")
.setCumulative()
.setUnit(Units.MILLISECONDS),
Field.ofEnum(SequenceType.class, "sequence", Metadata.Builder::noteDbSequenceType)
.description("The sequence from which IDs were retrieved.")
.build(),
Field.ofBoolean("multiple", Metadata.Builder::multiple)
.description("Whether more than one ID was retrieved.")
.build());
}
public int nextAccountId() {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(SequenceType.ACCOUNTS, false)) {
return accountSeq.next();
}
}
public int nextChangeId() {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(SequenceType.CHANGES, false)) {
return changeSeq.next();
}
}
public ImmutableList<Integer> nextChangeIds(int count) {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(SequenceType.CHANGES, count > 1)) {
return changeSeq.next(count);
}
}
public int nextGroupId() {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(SequenceType.GROUPS, false)) {
return groupSeq.next();
}
}
public int currentChangeId() {
return changeSeq.current();
}
public int currentAccountId() {
return accountSeq.current();
}
public int currentGroupId() {
return groupSeq.current();
}
public void setChangeIdValue(int value) {
changeSeq.storeNew(value);
}
public void setAccountIdValue(int value) {
accountSeq.storeNew(value);
}
public void setGroupIdValue(int value) {
groupSeq.storeNew(value);
}
}
|
