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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright (C) 2021 Samsung Electronics
* 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 org.onap.a1pesimulator.service.a1;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import lombok.Getter;
import org.onap.a1pesimulator.data.ue.UserEquipment;
import org.onap.a1pesimulator.data.ue.UserEquipmentNotification;
import org.onap.a1pesimulator.service.cell.RanCellService;
import org.onap.a1pesimulator.service.ue.RanUeService;
import org.onap.a1pesimulator.util.JsonUtils;
import org.onap.a1pesimulator.util.JsonUtils.JsonUtilsException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Service;
@Service
public class RanUeHandoverOnPolicyAction implements OnPolicyAction {
private static final String TOPIC_UE = "/topic/userEquipment";
private static final String POLICY_EXAMPLE =
"{ \"scope\": { \"ueId\": \"emergency_samsung_s10_01\" }, \"resources\": [ { \"cellIdList\": [ \"Cell1\" ], \"preference\": \"AVOID\" } ] }";
private static final Logger log = LoggerFactory.getLogger(RanUeHandoverOnPolicyAction.class);
private final RanUeService ranUeService;
private final SimpMessagingTemplate messagingTemplate;
private final RanCellService ranCellService;
private final PolicyInstancesHolder policyHolder;
public RanUeHandoverOnPolicyAction(SimpMessagingTemplate messagingTemplate, RanUeService ranUeService,
RanCellService ranCellService, PolicyInstancesHolder policyHolder) {
this.messagingTemplate = messagingTemplate;
this.ranUeService = ranUeService;
this.ranCellService = ranCellService;
this.policyHolder = policyHolder;
}
@Override
public boolean isForMe(Integer policyTypeId, String policyId, String body) {
try {
JsonUtils.INSTANCE.deserialize(body, UeHandoverPolicy.class);
return true;
} catch (JsonUtilsException ex) {
log.info(
"Policy {} is not for me because policy body doesn't comply with Ue Handover policy. Follow example: {}",
policyId, POLICY_EXAMPLE);
return false;
}
}
@Override
public void onPolicy(Integer policyTypeId, String policyId, String body) {
UeHandoverPolicy policy = JsonUtils.INSTANCE.deserialize(body, UeHandoverPolicy.class);
String ueId = policy.getScope().getUeId();
List<String> cellId = policy.getResources().stream().flatMap(resources -> resources.getCellIdList().stream())
.collect(Collectors.toList());
if (ueId == null || cellId.isEmpty()) {
log.warn("Cannot handover because {} is not provided in preload! Follow example: {}",
ueId == null ? "ueId" : "cellId", POLICY_EXAMPLE);
return;
}
Optional<String> activeCellId = getActiveCellForUE(ueId);
if (!activeCellId.isPresent()) {
log.warn("Cannot handover ue {} because there is no active cell in range", ueId);
return;
}
ranUeService.handover(ueId, activeCellId.get());
messagingTemplate.convertAndSend(TOPIC_UE, new UserEquipmentNotification(ueId, activeCellId.get()));
}
private Optional<String> getActiveCellForUE(String ue) {
Optional<UserEquipment> equipment = ranUeService.getUserEquipment(ue);
if (!equipment.isPresent()) {
log.warn("Cannot handover because is not ue with id: {}", ue);
return Optional.empty();
}
return ranCellService.getAllCellsWithStatus().stream().filter(c -> !c.isFailureMode())
.map(cellWithStatus -> cellWithStatus.getCell().getIdentifier())
.filter(cell -> ranUeService.canHandover(ue, cell))
.filter(cell -> !policyHolder.containsPoliciesForCell(cell)).findFirst();
}
@Getter
public static class UeHandoverPolicy {
private Scope scope;
private List<Resources> resources;
}
@Getter
public static class Scope {
private String ueId;
}
@Getter
public static class Resources {
private List<String> cellIdList;
private Preference preference;
}
public enum Preference {
SHALL("SHALL"), PREFER("PREFER"), AVOID("AVOID"), FORBID("FORBID");
public final String value;
Preference(String stateName) {
this.value = stateName;
}
}
}
|
