/*- * ============LICENSE_START======================================================= * feature-state-management * ================================================================================ * Copyright (C) 2017-2021 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. * ============LICENSE_END========================================================= */ package org.onap.policy.drools.statemanagement; import java.io.IOException; import org.onap.policy.common.im.AllSeemsWellException; import org.onap.policy.common.im.IntegrityMonitorException; import org.onap.policy.common.im.StateChangeNotifier; import org.onap.policy.common.im.StateManagement; import org.onap.policy.common.im.StateManagementException; import org.onap.policy.drools.core.PolicySessionFeatureApi; import org.onap.policy.drools.features.PolicyEngineFeatureApi; import org.onap.policy.drools.utils.PropertyUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * If this feature is supported, there is a single instance of it. * It adds persistence to Drools sessions, but it is also intertwined with * active/standby state management and IntegrityMonitor. For now, they are * all treated as a single feature, but it would be nice to separate them. * *
The bulk of the code here was once in other classes, such as * 'PolicyContainer' and 'Main'. It was moved here as part of making this * a separate optional feature. */ public class StateManagementFeature implements StateManagementFeatureApi, PolicySessionFeatureApi, PolicyEngineFeatureApi { // get an instance of logger private static final Logger logger = LoggerFactory.getLogger(StateManagementFeature.class); private DroolsPdpIntegrityMonitor droolsPdpIntegrityMonitor = null; private StateManagement stateManagement = null; public StateManagementFeature() { logger.debug("StateManagementFeature() constructor"); } @Override public void globalInit(String[] args, String configDir) { // Initialization code associated with 'PolicyContainer' logger.debug("StateManagementFeature.globalInit({}) entry", configDir); try { droolsPdpIntegrityMonitor = DroolsPdpIntegrityMonitor.init(configDir); } catch (Exception e) { logger.debug("DroolsPDPIntegrityMonitor initialization exception: ", e); logger.error("DroolsPDPIntegrityMonitor.init()", e); } initializeProperties(configDir); //At this point the DroolsPDPIntegrityMonitor instance must exist. Let's check it. try { droolsPdpIntegrityMonitor = DroolsPdpIntegrityMonitor.getInstance(); stateManagement = droolsPdpIntegrityMonitor.getStateManager(); if (stateManagement == null) { logger.debug("StateManagementFeature.globalInit(): stateManagement is NULL!"); } else { logger.debug("StateManagementFeature.globalInit(): " + "stateManagement.getAdminState(): {}", stateManagement.getAdminState()); } } catch (Exception e1) { logger.debug("StateManagementFeature.globalInit(): DroolsPDPIntegrityMonitor" + " initialization failed with exception:", e1); logger.error("DroolsPDPIntegrityMonitor.init(): StateManagementFeature startup failed " + "to get DroolsPDPIntegrityMonitor instance:", e1); } } /** * {@inheritDoc}. */ @Override public void addObserver(StateChangeNotifier stateChangeObserver) { logger.debug("StateManagementFeature.addObserver() entry\n" + "StateManagementFeature.addObserver(): " + "stateManagement.getAdminState(): {}", stateManagement.getAdminState()); stateManagement.addObserver(stateChangeObserver); logger.debug("StateManagementFeature.addObserver() exit"); } /** * {@inheritDoc}. */ @Override public String getAdminState() { return stateManagement.getAdminState(); } /** * {@inheritDoc}. */ @Override public String getOpState() { return stateManagement.getOpState(); } /** * {@inheritDoc}. */ @Override public String getAvailStatus() { return stateManagement.getAvailStatus(); } /** * {@inheritDoc}. */ @Override public String getStandbyStatus() { return stateManagement.getStandbyStatus(); } /** * {@inheritDoc}. */ @Override public String getStandbyStatus(String resourceName) { return stateManagement.getStandbyStatus(resourceName); } /** * {@inheritDoc}. */ @Override public void disableFailed(String resourceName) throws StateManagementException { stateManagement.disableFailed(resourceName); } /** * {@inheritDoc}. */ @Override public void disableFailed() throws StateManagementException { stateManagement.disableFailed(); } /** * {@inheritDoc}. */ @Override public void promote() throws IntegrityMonitorException { stateManagement.promote(); } /** * {@inheritDoc}. */ @Override public void demote() throws StateManagementException { stateManagement.demote(); } /** * {@inheritDoc}. */ @Override public String getResourceName() { return StateManagementProperties.getProperty(StateManagementProperties.NODE_NAME); } /** * {@inheritDoc}. * * @return true if locked or false if failed */ @Override public boolean lock() { try { stateManagement.lock(); } catch (Exception e) { logger.error("StateManagementFeature.lock() failed with exception", e); return false; } return true; } /** * {@inheritDoc}. * * @throws Exception exception */ @Override public boolean unlock() { try { stateManagement.unlock(); } catch (Exception e) { logger.error("StateManagementFeature.unlock() failed with exception", e); return false; } return true; } /** * {@inheritDoc}. * * @throws Exception exception */ @Override public boolean isLocked() { return StateManagement.LOCKED.equals(stateManagement.getAdminState()); } @Override public int getSequenceNumber() { return StateManagementFeatureApiConstants.SEQ_NUM; } /** * Read in the properties and initialize the StateManagementProperties. */ private static void initializeProperties(String configDir) { //Get the state management properties try { var props = PropertyUtil.getProperties(configDir + "/feature-state-management.properties"); StateManagementProperties.initProperties(props); logger.info("initializeProperties: resourceName= {}", StateManagementProperties.getProperty(StateManagementProperties.NODE_NAME)); } catch (IOException e1) { logger.error("initializeProperties", e1); } } @Override public void allSeemsWell(String key, Boolean asw, String msg) throws AllSeemsWellException { droolsPdpIntegrityMonitor.allSeemsWell(key, asw, msg); } }