2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.pdpx.main;
23 import java.util.Collections;
24 import org.apache.commons.lang3.StringUtils;
25 import org.onap.policy.common.utils.network.NetworkUtil;
26 import org.onap.policy.models.pdp.concepts.PdpMessage;
27 import org.onap.policy.models.pdp.concepts.PdpResponseDetails;
28 import org.onap.policy.models.pdp.concepts.PdpStateChange;
29 import org.onap.policy.models.pdp.concepts.PdpStatus;
30 import org.onap.policy.models.pdp.concepts.PdpUpdate;
31 import org.onap.policy.models.pdp.enums.PdpHealthStatus;
32 import org.onap.policy.models.pdp.enums.PdpResponseStatus;
33 import org.onap.policy.models.pdp.enums.PdpState;
34 import org.onap.policy.pdpx.main.rest.XacmlPdpApplicationManager;
35 import org.onap.policy.pdpx.main.startstop.XacmlPdpActivator;
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
40 * Current state of this XACML PDP.
42 public class XacmlState {
43 private static final Logger LOGGER = LoggerFactory.getLogger(XacmlState.class);
46 * Unique name for the xacml-pdp JVM, used in PdpStatus messages.
48 public static final String PDP_NAME = NetworkUtil.genUniqueName("xacml");
51 * The application manager.
53 private final XacmlPdpApplicationManager appManager;
56 * Records the current state of this PDP.
58 private final PdpStatus status;
61 * Constructs the object, initializing the state.
63 public XacmlState(XacmlPdpApplicationManager appManager, String pdpGroupName, String pdpType) {
64 this.appManager = appManager;
66 this.status = new PdpStatus();
67 this.status.setName(PDP_NAME);
68 this.status.setPdpType(pdpType);
69 this.status.setState(PdpState.PASSIVE);
70 this.status.setPolicies(Collections.emptyList());
71 this.status.setPdpGroup(pdpGroupName);
75 * Determines if this PDP should handle the given message.
77 * @param message message of interest
78 * @return {@code true} if this PDP should handle the message, {@code false} otherwise
80 public boolean shouldHandle(PdpMessage message) {
81 return message.appliesTo(status.getName(), status.getPdpGroup(), status.getPdpType());
85 * Generates a new heart beat message.
87 * @return a new heart beat message
89 public synchronized PdpStatus genHeartbeat() {
90 // first, update status fields
91 status.setHealthy(XacmlPdpActivator.getCurrent().isAlive() ? PdpHealthStatus.HEALTHY
92 : PdpHealthStatus.NOT_HEALTHY);
94 return new PdpStatus(status);
98 * Updates the internal state based on the given message.
100 * @param message message from which to update the internal state
101 * @return a response to the message
103 public synchronized PdpStatus updateInternalState(PdpStateChange message) {
104 LOGGER.info("set state of {} to {}", this, message.getState());
105 status.setState(message.getState());
108 * NOTE: Do NOT update group & subgroup as state-change requests do not set those
109 * fields to indicate new values; they only set them to do broadcasts to all PDPs
110 * within a group/subgroup.
113 PdpStatus status2 = makeResponse(message, "");
115 // these fields aren't needed in the response, so clear them out to avoid sending
116 status2.setPolicies(null);
122 * Updates the internal state based on the given message. Assumes that the policies
123 * have already been updated within the application manager.
125 * @param message message from which to update the internal state
126 * @return a response to the message
128 public synchronized PdpStatus updateInternalState(PdpUpdate message, String errMessage) {
129 status.setPdpSubgroup(message.getPdpSubgroup());
130 status.setPolicies(appManager.getToscaPolicyIdentifiers());
132 return makeResponse(message, errMessage);
136 * Updates the internal state to Terminated.
138 * @return the current PdpStatus with Terminated state
140 public synchronized PdpStatus terminatePdpMessage() {
141 LOGGER.info("set state of {} to {}", this, PdpState.TERMINATED);
142 status.setState(PdpState.TERMINATED);
143 return new PdpStatus(status);
147 * Makes a response to the given message, based on the current state.
149 * @param message message for which the response should be made
150 * @param errMessage the error message to be sent to PAP
151 * @return a new response
153 private PdpStatus makeResponse(PdpMessage message, String errMessage) {
154 var resp = new PdpResponseDetails();
156 if (StringUtils.isBlank(errMessage)) {
157 resp.setResponseStatus(PdpResponseStatus.SUCCESS);
159 resp.setResponseStatus(PdpResponseStatus.FAIL);
160 resp.setResponseMessage(errMessage);
162 resp.setResponseTo(message.getRequestId());
164 var status2 = new PdpStatus(status);
165 status2.setResponse(resp);