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diff --git a/appc-dispatcher/appc-dispatcher-common/appc-data-access-lib/src/main/java/org/onap/appc/dao/util/AppcDatabaseConnectionPool.java b/appc-dispatcher/appc-dispatcher-common/appc-data-access-lib/src/main/java/org/onap/appc/dao/util/AppcDatabaseConnectionPool.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * 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.
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.appc.dao.util;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import org.onap.appc.configuration.Configuration;
+import org.onap.appc.configuration.ConfigurationFactory;
+import org.onap.appc.dao.util.api.DBConnectionPoolService;
+import org.onap.appc.dao.util.dbcp.DBConnectionPool;
+import org.onap.appc.dao.util.exception.DBConnectionPoolException;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Map;
+
+/**
+ * This class implements
+ *
+ * @see org.onap.appc.dao.util.dbcp.DBConnectionPool
+ * that provides concrete implemenation of accessing appc database which basic setup
+ * data would be got from global configuration.
+ * @see org.onap.appc.configuration.Configuration
+ * <p>
+ * The singleton instance of this class has been instantiated by blueprint.
+ * An example is shown in the {@link DBConnectionPoolService}
+ */
+public class AppcDatabaseConnectionPool implements DBConnectionPoolService {
+ enum PropertyPattern {
+ DBURL("org.onap.appc.db.url.%s"),
+ USERNAME("org.onap.appc.db.user.%s"),
+ PASSWORD("org.onap.appc.db.pass.%s"),
+ DRIVER("org.onap.appc.db.jdbc.driver");
+
+ private String pattern;
+
+ PropertyPattern(String pattern) {
+ this.pattern = pattern;
+ }
+
+ public String getPattern() {
+ return pattern;
+ }
+ }
+
+ private final EELFLogger logger = EELFManager.getInstance().getLogger(AppcDatabaseConnectionPool.class);
+
+ private DBConnectionPool dbConnectionPool;
+ private String dbName;
+
+ public AppcDatabaseConnectionPool() {
+ // do nothing
+ }
+
+ public AppcDatabaseConnectionPool(String dbUrl, String userName, String password, String jdbcDriver) {
+ dbConnectionPool = new DBConnectionPool(dbUrl, userName, password, jdbcDriver);
+ }
+
+ /**
+ * Injected by blueprint
+ *
+ * @param dbName
+ */
+ public void setDbName(String dbName) {
+ this.dbName = dbName;
+ }
+
+ /**
+ * Bean init method used by blueprint
+ */
+ public void init() {
+ Configuration configuration = ConfigurationFactory.getConfiguration();
+ String dbUrl = getConnectionProperty(configuration, PropertyPattern.DBURL);
+ String userName = getConnectionProperty(configuration, PropertyPattern.USERNAME);
+ String password = getConnectionProperty(configuration, PropertyPattern.PASSWORD);
+ String jdbcDriver = getJDBCDriver(configuration);
+
+ dbConnectionPool = new DBConnectionPool(dbUrl, userName, password, jdbcDriver);
+
+ // a simple health check
+ Connection connection = null;
+ try {
+ connection = dbConnectionPool.getConnection();
+ } catch (DBConnectionPoolException e) {
+ logger.error("DB connection pool is created failed." +
+ "Please make sure the provided information is correct.");
+ }
+
+ if (connection != null) {
+ try {
+ connection.close();
+ } catch (SQLException e) {
+ logger.error("DB connection cannot be closed:", e.getMessage());
+ }
+ }
+ }
+
+ /**
+ * Bean destroy method used by blueprint
+ */
+ public void destroy() {
+ if (dbConnectionPool != null) {
+ dbConnectionPool.shutdown();
+ }
+ }
+
+ /**
+ * Get the connection from connection pool.
+ *
+ * @return Connection. If the provided db information is not correct,
+ * the return value might be null.
+ */
+ @Override
+ public Connection getConnection() throws DBConnectionPoolException {
+ return dbConnectionPool.getConnection();
+ }
+
+ /**
+ * Get dbcp status like active_status.
+ * <p>
+ * More details about status of DBConnectionPool,
+ * go check {@link org.onap.appc.dao.util.dbcp.DBConnectionPool#getDataSourceStatus()}
+ *
+ * @return a map contains some dbcp information.
+ */
+ @Override
+ public Map<String, Integer> getDataSourceStatus() {
+ return dbConnectionPool.getDataSourceStatus();
+ }
+
+ private String getConnectionProperty(Configuration configuration, PropertyPattern propertyPattern) {
+ String property = configuration.getProperty(String.format(propertyPattern.getPattern(), dbName), "");
+ return property;
+ }
+
+ private String getJDBCDriver(Configuration configuration) {
+ return configuration.getProperty(PropertyPattern.DRIVER.getPattern(), "");
+ }
+}