/*- * ============LICENSE_START======================================================= * Copyright (C) 2019-2021, 2023 Nordix Foundation. * Modifications Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved. * Modifications Copyright (C) 2020, 2022 Bell Canada. 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.provider.impl; import jakarta.ws.rs.core.Response; import lombok.Getter; import lombok.NonNull; import org.onap.policy.models.base.PfModelException; import org.onap.policy.models.dao.PfDao; import org.onap.policy.models.provider.PolicyModelsProviderParameters; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class provides an implementation of the Policy Models Provider for the ONAP Policy Framework that works towards * a relational database. * * @author Liam Fallon (liam.fallon@est.tech) */ public class DatabasePolicyModelsProviderImpl extends AbstractPolicyModelsProvider { private static final Logger LOGGER = LoggerFactory.getLogger(DatabasePolicyModelsProviderImpl.class); private final PolicyModelsProviderParameters parameters; // Database connection and the DAO for reading and writing Policy Framework concepts @Getter private PfDao pfDao; /** * Constructor that takes the parameters. * * @param parameters the parameters for the provider */ public DatabasePolicyModelsProviderImpl(@NonNull final PolicyModelsProviderParameters parameters) { this.parameters = parameters; } @Override public synchronized void init() throws PfModelException { LOGGER.debug("opening the database connection to {} using persistence unit {}", parameters.getDatabaseUrl(), parameters.getPersistenceUnit()); if (pfDao != null) { var errorMessage = "provider is already initialized"; throw new PfModelException(Response.Status.NOT_ACCEPTABLE, errorMessage); } pfDao = ModelsProvider.init(parameters); } @Override public synchronized void close() throws PfModelException { LOGGER.debug("closing the database connection to {} using persistence unit {}", parameters.getDatabaseUrl(), parameters.getPersistenceUnit()); if (pfDao != null) { pfDao.close(); pfDao = null; } LOGGER.debug("closed the database connection to {} using persistence unit {}", parameters.getDatabaseUrl(), parameters.getPersistenceUnit()); } }