/
ClusterCostCache.java
89 lines (76 loc) · 2.75 KB
/
ClusterCostCache.java
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
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.druid.server.coordinator.cost;
import com.google.common.base.Preconditions;
import org.apache.druid.timeline.DataSegment;
import org.apache.druid.utils.CollectionUtils;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class ClusterCostCache
{
private final Map<String, ServerCostCache> serversCostCache;
ClusterCostCache(Map<String, ServerCostCache> serversCostCache)
{
this.serversCostCache = Preconditions.checkNotNull(serversCostCache);
}
public double computeCost(String serverName, DataSegment dataSegment)
{
ServerCostCache serverCostCache = serversCostCache.get(serverName);
return (serverCostCache != null) ? serverCostCache.computeCost(dataSegment) : 0.0;
}
public static Builder builder()
{
return new Builder();
}
public static Builder builder(Map<String, Set<DataSegment>> segmentsByServerName)
{
Builder builder = builder();
segmentsByServerName.forEach(
(serverName, segments) -> segments.forEach(segment -> builder.addSegment(serverName, segment))
);
return builder;
}
public static class Builder
{
private final Map<String, ServerCostCache.Builder> serversCostCache = new HashMap<>();
public void addSegment(String serverName, DataSegment dataSegment)
{
ServerCostCache.Builder builder = serversCostCache.computeIfAbsent(serverName, s -> ServerCostCache.builder());
builder.addSegment(dataSegment);
}
public void removeSegment(String serverName, DataSegment dataSegment)
{
serversCostCache.computeIfPresent(
serverName,
(s, builder) -> builder.removeSegment(dataSegment).isEmpty() ? null : builder
);
}
public void removeServer(String serverName)
{
serversCostCache.remove(serverName);
}
public ClusterCostCache build()
{
return new ClusterCostCache(
CollectionUtils.mapValues(serversCostCache, ServerCostCache.Builder::build)
);
}
}
}