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
|
// Copyright (C) 2015 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.metrics.dropwizard;
import com.codahale.metrics.Metric;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.gerrit.metrics.Description;
import com.google.gerrit.metrics.Field;
import com.google.gerrit.metrics.dropwizard.DropWizardMetricMaker.TimerImpl;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/** Abstract timer broken down into buckets by {@link Field} values. */
abstract class BucketedTimer implements BucketedMetric {
private final DropWizardMetricMaker metrics;
private final String name;
private final Description.FieldOrdering ordering;
protected final Field<?>[] fields;
protected final TimerImpl total;
private final Map<Object, TimerImpl> cells;
private final Object lock = new Object();
BucketedTimer(DropWizardMetricMaker metrics, String name, Description desc, Field<?>... fields) {
this.metrics = metrics;
this.name = name;
this.ordering = desc.getFieldOrdering();
this.fields = fields;
this.total = metrics.newTimerImpl(name + "_total");
this.cells = new ConcurrentHashMap<>();
}
void doRemove() {
for (TimerImpl c : cells.values()) {
c.remove();
}
total.remove();
metrics.remove(name);
}
TimerImpl forceCreate(Object f1, Object f2) {
return forceCreate(ImmutableList.of(f1, f2));
}
TimerImpl forceCreate(Object f1, Object f2, Object f3) {
return forceCreate(ImmutableList.of(f1, f2, f3));
}
TimerImpl forceCreate(Object key) {
TimerImpl c = cells.get(key);
if (c != null) {
return c;
}
synchronized (lock) {
c = cells.get(key);
if (c == null) {
c = metrics.newTimerImpl(submetric(key));
cells.put(key, c);
}
return c;
}
}
private String submetric(Object key) {
return DropWizardMetricMaker.name(ordering, name, name(key));
}
abstract String name(Object key);
@Override
public Metric getTotal() {
return total.metric;
}
@Override
public Field<?>[] getFields() {
return fields;
}
@Override
public Map<Object, Metric> getCells() {
return Maps.transformValues(cells, t -> t.metric);
}
}
|
