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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* ================================================================================
* Modifications Copyright (C) 2019 Ericsson
* =============================================================================
* 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.appc.dao.util.dbcp;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.apache.commons.dbcp2.BasicDataSource;
import org.onap.appc.dao.util.api.DBConnectionPoolService;
import org.onap.appc.dao.util.exception.DBConnectionPoolException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
/**
* This class provides ability to create database connection pool.
*/
public class DBConnectionPool implements DBConnectionPoolService {
private final EELFLogger logger = EELFManager.getInstance().getLogger(DBConnectionPool.class);
private BasicDataSource dataSource;
public enum DataSourceStatus {
ACTIVE_NUMBER("active_number"),
IDLE_NUMBER("idle_number");
private String attribute;
DataSourceStatus(String attribute) {
this.attribute = attribute;
}
public String getAttribute() {
return attribute;
}
}
public DBConnectionPool(String connectURI, String username, String password, String driverClass) {
this(connectURI, username, password, driverClass, null, null, null, null, null);
}
public DBConnectionPool(String connectURI, String username, String password,
String driverClass, Integer initialSize, Integer maxActive,
Integer maxIdle, Integer maxWait, Integer minIdle) {
this.dataSource = getBasicDataSource(connectURI, username, password, driverClass,
initialSize, maxActive, maxIdle, maxWait, minIdle);
}
/**
* Get a connection from datasource which is thread safe.
* {@inheritDoc}
*/
@Override
public Connection getConnection() throws DBConnectionPoolException {
if (dataSource == null) {
throw new DBConnectionPoolException();
}
Connection connection = null;
try {
connection = dataSource.getConnection();
} catch (SQLException e) {
logger.error("Get connection failure", e);
throw new DBConnectionPoolException(e);
}
if(connection == null){
//
throw new DBConnectionPoolException("Connection was not created");
}
return connection;
}
/**
* Closes and releases all idle connections that are currently stored in the connection pool associated with this
* data source.
*/
public void shutdown() {
if (dataSource != null) {
try {
dataSource.close();
} catch (SQLException e) {
logger.error("Datasource cannot be closed normally.", e.getMessage());
}
}
dataSource = null;
}
/**
* Get datasource status
*
* @return
*/
public Map<String, Integer> getDataSourceStatus() {
Map<String, Integer> map = new HashMap<>(2);
map.put(DataSourceStatus.ACTIVE_NUMBER.getAttribute(), dataSource.getNumActive());
map.put(DataSourceStatus.IDLE_NUMBER.getAttribute(), dataSource.getNumIdle());
return map;
}
protected BasicDataSource getBasicDataSource(String connectURI, String username, String password,
String driverClass, Integer initialSize, Integer maxtotal,
Integer maxIdle, Integer maxWaitMillis, Integer minIdle) {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUsername(username);
dataSource.setPassword(password);
dataSource.setUrl(connectURI);
if (initialSize != null) {
dataSource.setInitialSize(initialSize);
}
if (maxtotal != null) {
dataSource.setMaxTotal(maxtotal);
}
if (maxIdle != null) {
dataSource.setMaxIdle(maxIdle);
}
if (maxWaitMillis != null) {
dataSource.setMaxWaitMillis(maxWaitMillis);
}
if (minIdle != null) {
dataSource.setMinIdle(minIdle);
}
return dataSource;
}
}
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