diff options
Diffstat (limited to 'services/services-onappf/src/main/java/org/onap/policy/apex/services/onappf/handler/PdpUpdateMessageHandler.java')
| -rw-r--r-- | services/services-onappf/src/main/java/org/onap/policy/apex/services/onappf/handler/PdpUpdateMessageHandler.java | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/services/services-onappf/src/main/java/org/onap/policy/apex/services/onappf/handler/PdpUpdateMessageHandler.java b/services/services-onappf/src/main/java/org/onap/policy/apex/services/onappf/handler/PdpUpdateMessageHandler.java new file mode 100644 index 000000000..31963ddc0 --- /dev/null +++ b/services/services-onappf/src/main/java/org/onap/policy/apex/services/onappf/handler/PdpUpdateMessageHandler.java @@ -0,0 +1,161 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2019 Nordix Foundation. + * ================================================================================ + * 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.apex.services.onappf.handler; + +import java.util.List; + +import org.onap.policy.apex.services.onappf.ApexStarterConstants; +import org.onap.policy.apex.services.onappf.comm.PdpStatusPublisher; +import org.onap.policy.apex.services.onappf.exception.ApexStarterException; +import org.onap.policy.common.endpoints.event.comm.TopicSink; +import org.onap.policy.common.utils.services.Registry; +import org.onap.policy.models.pdp.concepts.PdpResponseDetails; +import org.onap.policy.models.pdp.concepts.PdpStatus; +import org.onap.policy.models.pdp.concepts.PdpUpdate; +import org.onap.policy.models.pdp.enums.PdpResponseStatus; +import org.onap.policy.models.pdp.enums.PdpState; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * This class supports the handling of pdp update messages. + * + * @author Ajith Sreekumar (ajith.sreekumar@est.tech) + */ +public class PdpUpdateMessageHandler { + + private static final Logger LOGGER = LoggerFactory.getLogger(PdpUpdateMessageHandler.class); + + /** + * Method which handles a pdp update event from PAP. + * + * @param pdpUpdateMsg pdp update message + */ + public void handlePdpUpdateEvent(final PdpUpdate pdpUpdateMsg) { + final PdpMessageHandler pdpMessageHandler = new PdpMessageHandler(); + final PdpStatus pdpStatusContext = Registry.get(ApexStarterConstants.REG_PDP_STATUS_OBJECT, PdpStatus.class); + PdpResponseDetails pdpResponseDetails = null; + if (pdpUpdateMsg.appliesTo(pdpStatusContext.getName(), pdpStatusContext.getPdpGroup(), + pdpStatusContext.getPdpSubgroup())) { + final PdpStatusPublisher pdpStatusPublisher = Registry.get(ApexStarterConstants.REG_PDP_STATUS_PUBLISHER); + if (checkIfAlreadyHandled(pdpUpdateMsg, pdpStatusContext)) { + pdpResponseDetails = pdpMessageHandler.createPdpResonseDetails(pdpUpdateMsg.getRequestId(), + PdpResponseStatus.SUCCESS, "Pdp already updated"); + } else { + if (null != pdpUpdateMsg.getPdpHeartbeatIntervalMs() && pdpUpdateMsg.getPdpHeartbeatIntervalMs() > 0 + && pdpStatusPublisher.getInterval() != pdpUpdateMsg.getPdpHeartbeatIntervalMs()) { + updateInterval(pdpUpdateMsg.getPdpHeartbeatIntervalMs()); + } + pdpStatusContext.setPdpGroup(pdpUpdateMsg.getPdpGroup()); + pdpStatusContext.setPdpSubgroup(pdpUpdateMsg.getPdpSubgroup()); + pdpStatusContext + .setPolicies(new PdpMessageHandler().getToscaPolicyIdentifiers(pdpUpdateMsg.getPolicies())); + if (pdpStatusContext.getState().equals(PdpState.ACTIVE)) { + pdpResponseDetails = startOrStopApexEngineBasedOnPolicies(pdpUpdateMsg, pdpMessageHandler); + } + Registry.registerOrReplace(ApexStarterConstants.REG_APEX_TOSCA_POLICY_LIST, pdpUpdateMsg.getPolicies()); + if (null == pdpResponseDetails) { + pdpResponseDetails = pdpMessageHandler.createPdpResonseDetails(pdpUpdateMsg.getRequestId(), + PdpResponseStatus.SUCCESS, "Pdp update successful."); + } + } + final PdpStatusPublisher pdpStatusPublisherTemp = + Registry.get(ApexStarterConstants.REG_PDP_STATUS_PUBLISHER); + final PdpStatus pdpStatus = pdpMessageHandler.createPdpStatusFromContext(); + pdpStatus.setResponse(pdpResponseDetails); + pdpStatus.setDescription("Pdp status response message for PdpUpdate"); + pdpStatusPublisherTemp.send(pdpStatus); + } + } + + /** + * Method to start or stop apex engine based on the list of policies received from pap. When current state is + * active, if PAP sends PdpUpdate with empty policies list, stop apex engine, or, if there is a change in policies, + * stop the current running policies and the deploy the new ones. + * + * @param pdpUpdateMsg the pdp update message from pap + * @param pdpMessageHandler pdp message handler + * @param pdpStatusContext the pdp status object in memory + * @return pdpResponseDetails the pdp response + */ + private PdpResponseDetails startOrStopApexEngineBasedOnPolicies(final PdpUpdate pdpUpdateMsg, + final PdpMessageHandler pdpMessageHandler) { + PdpResponseDetails pdpResponseDetails = null; + if (pdpUpdateMsg.getPolicies().isEmpty()) { + final ApexEngineHandler apexEngineHandler = Registry.get(ApexStarterConstants.REG_APEX_ENGINE_HANDLER); + if (apexEngineHandler.isApexEngineRunning()) { + try { + apexEngineHandler.shutdown(); + } catch (final ApexStarterException e) { + LOGGER.error("Pdp update failed as the policies couldn't be undeployed.", e); + pdpResponseDetails = pdpMessageHandler.createPdpResonseDetails(pdpUpdateMsg.getRequestId(), + PdpResponseStatus.FAIL, "Pdp update failed as the policies couldn't be undeployed."); + } + } + } else { + try { + ApexEngineHandler apexEngineHandler = Registry.get(ApexStarterConstants.REG_APEX_ENGINE_HANDLER); + if (apexEngineHandler.isApexEngineRunning()) { + apexEngineHandler.shutdown(); + } + apexEngineHandler = new ApexEngineHandler( + (String) pdpUpdateMsg.getPolicies().get(0).getProperties().get("content")); + Registry.registerOrReplace(ApexStarterConstants.REG_APEX_ENGINE_HANDLER, apexEngineHandler); + pdpResponseDetails = pdpMessageHandler.createPdpResonseDetails(pdpUpdateMsg.getRequestId(), + PdpResponseStatus.SUCCESS, "Apex engine started and policies are running."); + } catch (final ApexStarterException e) { + LOGGER.error("Apex engine service running failed. ", e); + pdpResponseDetails = pdpMessageHandler.createPdpResonseDetails(pdpUpdateMsg.getRequestId(), + PdpResponseStatus.FAIL, "Apex engine service running failed. " + e.getMessage()); + } + } + return pdpResponseDetails; + } + + /** + * Method checks if the Pdp update message is already handled by checking the values in the context. + * + * @param pdpUpdateMsg pdp update message received from pap + * @param pdpStatusContext values saved in context memory + * @return boolean flag which tells if the information is same or not + */ + private boolean checkIfAlreadyHandled(final PdpUpdate pdpUpdateMsg, final PdpStatus pdpStatusContext) { + return null != pdpStatusContext.getPdpGroup() + && pdpStatusContext.getPdpGroup().equals(pdpUpdateMsg.getPdpGroup()) + && null != pdpStatusContext.getPdpSubgroup() + && pdpStatusContext.getPdpSubgroup().equals(pdpUpdateMsg.getPdpSubgroup()) + && null != pdpStatusContext.getPolicies() && new PdpMessageHandler() + .getToscaPolicyIdentifiers(pdpUpdateMsg.getPolicies()).equals(pdpStatusContext.getPolicies()); + } + + /** + * Method to update the time interval used by the timer task. + * + * @param interval time interval received in the pdp update message from pap + */ + public void updateInterval(final long interval) { + final PdpStatusPublisher pdpStatusPublisher = Registry.get(ApexStarterConstants.REG_PDP_STATUS_PUBLISHER); + pdpStatusPublisher.terminate(); + final List<TopicSink> topicSinks = Registry.get(ApexStarterConstants.REG_APEX_PDP_TOPIC_SINKS); + Registry.registerOrReplace(ApexStarterConstants.REG_PDP_STATUS_PUBLISHER, + new PdpStatusPublisher(topicSinks, interval)); + } +} |