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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;
import static com.google.gerrit.server.Sequence.NAME_ACCOUNTS;
import static com.google.gerrit.server.Sequence.NAME_CHANGES;
import static com.google.gerrit.server.Sequence.NAME_GROUPS;
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.Sequence.SequenceType;
import com.google.gerrit.server.logging.Metadata;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
@Singleton
public class Sequences {
public static final int FIRST_CHANGE_ID = 1;
public static final int FIRST_GROUP_ID = 1;
public static final int FIRST_ACCOUNT_ID = 1000000;
private final Sequence accountSeq;
private final Sequence changeSeq;
private final Sequence groupSeq;
private final Timer2<SequenceType, Boolean> nextIdLatency;
@Inject
public Sequences(
MetricMaker metrics,
@Named(NAME_ACCOUNTS) Sequence accountsSeq,
@Named(NAME_GROUPS) Sequence groupsSeq,
@Named(NAME_CHANGES) Sequence changesSeq) {
this.accountSeq = accountsSeq;
this.groupSeq = groupsSeq;
this.changeSeq = changesSeq;
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(Sequence.SequenceType.ACCOUNTS, false)) {
return accountSeq.next();
}
}
public int nextChangeId() {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(Sequence.SequenceType.CHANGES, false)) {
return changeSeq.next();
}
}
public ImmutableList<Integer> nextChangeIds(int count) {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(Sequence.SequenceType.CHANGES, count > 1)) {
return changeSeq.next(count);
}
}
public int nextGroupId() {
try (Timer2.Context<SequenceType, Boolean> timer =
nextIdLatency.start(Sequence.SequenceType.GROUPS, false)) {
return groupSeq.next();
}
}
public int changeBatchSize() {
return changeSeq.getBatchSize();
}
public int groupBatchSize() {
return groupSeq.getBatchSize();
}
public int accountBatchSize() {
return accountSeq.getBatchSize();
}
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);
}
}