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
|
/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* Modifications Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.models.sim.pdp.handler;
import java.util.List;
import org.onap.policy.common.utils.services.Registry;
import org.onap.policy.models.pdp.concepts.PdpResponseDetails;
import org.onap.policy.models.pdp.concepts.PdpStateChange;
import org.onap.policy.models.pdp.concepts.PdpStatus;
import org.onap.policy.models.pdp.enums.PdpResponseStatus;
import org.onap.policy.models.pdp.enums.PdpState;
import org.onap.policy.models.sim.pdp.PdpSimulatorConstants;
import org.onap.policy.models.sim.pdp.comm.PdpStatusPublisher;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
/**
* This class supports the handling of pdp state change messages.
*
* @author Ajith Sreekumar (ajith.sreekumar@est.tech)
*/
public class PdpStateChangeMessageHandler {
/**
* Method which handles a pdp state change event from PAP.
*
* @param pdpStateChangeMsg pdp state change message
*/
public void handlePdpStateChangeEvent(final PdpStateChange pdpStateChangeMsg) {
final var pdpStatusContext = Registry.get(PdpSimulatorConstants.REG_PDP_STATUS_OBJECT, PdpStatus.class);
final var pdpStatusPublisher =
Registry.get(PdpSimulatorConstants.REG_PDP_STATUS_PUBLISHER, PdpStatusPublisher.class);
final var pdpMessageHandler = new PdpMessageHandler();
PdpResponseDetails pdpResponseDetails = null;
if (pdpStateChangeMsg.appliesTo(pdpStatusContext.getName(), pdpStatusContext.getPdpGroup(),
pdpStatusContext.getPdpSubgroup())) {
switch (pdpStateChangeMsg.getState()) {
case PASSIVE:
pdpResponseDetails = handlePassiveState(pdpStateChangeMsg, pdpStatusContext, pdpMessageHandler);
break;
case ACTIVE:
pdpResponseDetails = handleActiveState(pdpStateChangeMsg, pdpStatusContext, pdpMessageHandler);
break;
default:
break;
}
final var pdpStatus = pdpMessageHandler.createPdpStatusFromContext();
pdpStatus.setResponse(pdpResponseDetails);
pdpStatus.setDescription("Pdp status response message for PdpStateChange");
pdpStatusPublisher.send(pdpStatus);
}
}
/**
* Method to handle when the new state from pap is active.
*
* @param pdpStateChangeMsg pdp state change message
* @param pdpStatusContext pdp status object in memory
* @param pdpMessageHandler the pdp message handler
* @return pdpResponseDetails pdp response
*/
private PdpResponseDetails handleActiveState(final PdpStateChange pdpStateChangeMsg,
final PdpStatus pdpStatusContext, final PdpMessageHandler pdpMessageHandler) {
PdpResponseDetails pdpResponseDetails = null;
if (pdpStatusContext.getState().equals(PdpState.ACTIVE)) {
pdpResponseDetails = pdpMessageHandler.createPdpResponseDetails(pdpStateChangeMsg.getRequestId(),
PdpResponseStatus.SUCCESS, "Pdp already in active state");
} else {
final List<ToscaPolicy> policies = Registry.get(PdpSimulatorConstants.REG_PDP_TOSCA_POLICY_LIST);
if (policies.isEmpty()) {
pdpStatusContext.setState(PdpState.ACTIVE);
pdpResponseDetails = pdpMessageHandler.createPdpResponseDetails(pdpStateChangeMsg.getRequestId(),
PdpResponseStatus.SUCCESS, "State changed to active. No policies found.");
} else {
pdpResponseDetails = pdpMessageHandler.createPdpResponseDetails(pdpStateChangeMsg.getRequestId(),
PdpResponseStatus.SUCCESS, "Pdp started. State changed to active.");
pdpStatusContext.setState(PdpState.ACTIVE);
}
}
return pdpResponseDetails;
}
/**
* Method to handle when the new state from pap is passive.
*
* @param pdpStateChangeMsg pdp state change message
* @param pdpStatusContext pdp status object in memory
* @param pdpMessageHandler the pdp message handler
* @return pdpResponseDetails pdp response
*/
private PdpResponseDetails handlePassiveState(final PdpStateChange pdpStateChangeMsg,
final PdpStatus pdpStatusContext, final PdpMessageHandler pdpMessageHandler) {
PdpResponseDetails pdpResponseDetails = null;
if (pdpStatusContext.getState().equals(PdpState.PASSIVE)) {
pdpResponseDetails = pdpMessageHandler.createPdpResponseDetails(pdpStateChangeMsg.getRequestId(),
PdpResponseStatus.SUCCESS, "Pdp already in passive state");
} else {
pdpResponseDetails = pdpMessageHandler.createPdpResponseDetails(pdpStateChangeMsg.getRequestId(),
PdpResponseStatus.SUCCESS, "Pdp state changed from Active to Passive.");
pdpStatusContext.setState(PdpState.PASSIVE);
}
return pdpResponseDetails;
}
}
|
