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// 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;
private final int accountBatchSize;
private final int changeBatchSize;
private final int groupBatchSize = 1;
@Inject
public Sequences(
@GerritServerConfig Config cfg,
GitRepositoryManager repoManager,
GitReferenceUpdated gitRefUpdated,
AllProjectsName allProjects,
AllUsersName allUsers,
MetricMaker metrics) {
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);
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);
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 changeBatchSize() {
return changeBatchSize;
}
public int groupBatchSize() {
return groupBatchSize;
}
public int accountBatchSize() {
return accountBatchSize;
}
public int currentChangeId() {
return changeSeq.current();
}
public int currentAccountId() {
return accountSeq.current();
}
public int currentGroupId() {
return groupSeq.current();
}
public int lastChangeId() {
return changeSeq.last();
}
public int lastGroupId() {
return groupSeq.last();
}
public int lastAccountId() {
return accountSeq.last();
}
public void setChangeIdValue(int value) {
changeSeq.storeNew(value);
}
public void setAccountIdValue(int value) {
accountSeq.storeNew(value);
}
public void setGroupIdValue(int value) {
groupSeq.storeNew(value);
}
}