2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. 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.apex.context.impl.persistence;
23 import org.onap.policy.apex.context.ContextException;
24 import org.onap.policy.apex.context.Persistor;
25 import org.onap.policy.apex.context.parameters.ContextParameterConstants;
26 import org.onap.policy.apex.context.parameters.PersistorParameters;
27 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
28 import org.onap.policy.apex.model.utilities.Assertions;
29 import org.onap.policy.common.parameters.ParameterService;
30 import org.slf4j.ext.XLogger;
31 import org.slf4j.ext.XLoggerFactory;
34 * This class returns a persistor for the particular type of persistor mechanism that has been configured for use.
36 * @author Liam Fallon (liam.fallon@ericsson.com)
38 public class PersistorFactory {
39 // Get a reference to the logger
40 private static final XLogger LOGGER = XLoggerFactory.getXLogger(PersistorFactory.class);
43 * Return a persistor for the persistence mechanism configured for use.
45 * @param key The key for the persistor
47 * @throws ContextException on invalid persistor types
49 public Persistor createPersistor(final AxArtifactKey key) throws ContextException {
50 LOGGER.entry("persistor factory, key=" + key);
51 Assertions.argumentOfClassNotNull(key, ContextException.class, "Parameter \"key\" may not be null");
53 final PersistorParameters persistorParameters = ParameterService
54 .get(ContextParameterConstants.PERSISTENCE_GROUP_NAME);
56 // Get the class for the persistor using reflection
57 Object persistorObject = null;
58 final String pluginClass = persistorParameters.getPluginClass();
60 persistorObject = Class.forName(pluginClass).newInstance();
61 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
62 LOGGER.error("Apex context persistor class not found for context persistor plugin \"" + pluginClass + "\"",
64 throw new ContextException("Apex context persistor class not found for context persistor plugin \""
65 + pluginClass + "\"", e);
68 // Check the class is a persistor
69 if (!(persistorObject instanceof Persistor)) {
70 LOGGER.error("Specified Apex context persistor plugin class \"{}\" "
71 + "does not implement the ContextDistributor interface", pluginClass);
72 throw new ContextException("Specified Apex context persistor plugin class \"" + pluginClass
73 + "\" does not implement the ContextDistributor interface");
76 // The persistor to return
77 final Persistor persistor = (Persistor) persistorObject;
79 // Lock and load the persistor
82 LOGGER.exit("Persistor factory, key=" + key + ", selected persistor of class " + persistor.getClass());