/
KubernetesDiscoveryClient.java
100 lines (84 loc) · 3.6 KB
/
KubernetesDiscoveryClient.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
90
91
92
93
94
95
96
97
98
99
100
/*
* Copyright 2013-2021 the original author or authors.
*
* 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
*
* https://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.springframework.cloud.kubernetes.discovery;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.kubernetes.commons.discovery.DefaultKubernetesServiceInstance;
import org.springframework.cloud.kubernetes.commons.discovery.KubernetesDiscoveryProperties;
import org.springframework.cloud.kubernetes.commons.discovery.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.client.RestTemplate;
/**
* @author Ryan Baxter
*/
public class KubernetesDiscoveryClient implements DiscoveryClient {
private final RestTemplate rest;
private final boolean emptyNamespaces;
private final Set<String> namespaces;
private final String discoveryServerUrl;
@Deprecated(forRemoval = true)
public KubernetesDiscoveryClient(RestTemplate rest, KubernetesDiscoveryClientProperties properties) {
if (!StringUtils.hasText(properties.getDiscoveryServerUrl())) {
throw new DiscoveryServerUrlInvalidException();
}
this.rest = rest;
this.emptyNamespaces = properties.getNamespaces().isEmpty();
this.namespaces = properties.getNamespaces();
this.discoveryServerUrl = properties.getDiscoveryServerUrl();
}
KubernetesDiscoveryClient(RestTemplate rest, KubernetesDiscoveryProperties kubernetesDiscoveryProperties) {
if (!StringUtils.hasText(kubernetesDiscoveryProperties.discoveryServerUrl())) {
throw new DiscoveryServerUrlInvalidException();
}
this.rest = rest;
this.emptyNamespaces = kubernetesDiscoveryProperties.namespaces().isEmpty();
this.namespaces = kubernetesDiscoveryProperties.namespaces();
this.discoveryServerUrl = kubernetesDiscoveryProperties.discoveryServerUrl();
}
@Override
public String description() {
return "Kubernetes Discovery Client";
}
@Override
public List<ServiceInstance> getInstances(String serviceId) {
DefaultKubernetesServiceInstance[] responseBody = rest
.getForEntity(discoveryServerUrl + "/apps/" + serviceId, DefaultKubernetesServiceInstance[].class)
.getBody();
if (responseBody != null && responseBody.length > 0) {
return Arrays.stream(responseBody).filter(this::matchNamespaces).collect(Collectors.toList());
}
return List.of();
}
@Override
public List<String> getServices() {
Service[] services = rest.getForEntity(discoveryServerUrl + "/apps", Service[].class).getBody();
if (services != null && services.length > 0) {
return Arrays.stream(services).filter(this::matchNamespaces).map(Service::name).toList();
}
return List.of();
}
private boolean matchNamespaces(DefaultKubernetesServiceInstance kubernetesServiceInstance) {
return emptyNamespaces || namespaces.contains(kubernetesServiceInstance.getNamespace());
}
private boolean matchNamespaces(Service service) {
return service.serviceInstances().isEmpty()
|| service.serviceInstances().stream().anyMatch(this::matchNamespaces);
}
}