1 package org.onap.config.impl;
3 import org.apache.commons.configuration2.ImmutableConfiguration;
4 import org.apache.commons.dbcp2.BasicDataSource;
5 import org.apache.commons.lang3.StringUtils;
6 import org.onap.config.ConfigurationUtils;
7 import org.onap.config.Constants;
9 import java.sql.Driver;
12 * The type Configuration data source.
14 public final class ConfigurationDataSource {
16 private static BasicDataSource configDBDatasource = null;
17 private static Set<String> validCallers = Collections.unmodifiableSet(new HashSet<>(
18 Arrays.asList(ConfigurationUtils.class.getName(), CliConfigurationImpl.class.getName())));
20 private ConfigurationDataSource() {
21 //Hide constructor to prevent instantiation using the default implicit constructor
26 configDBDatasource = initDataSource();
27 } catch (Exception exception) {
28 System.err.println("Datasource initialization error. Configuration management will be using"
29 + "in-memory persistence.");
34 * Lookup basic data source.
36 * @return the basic data source
37 * @throws Exception the exception
39 public static BasicDataSource lookup() throws Exception {
40 if (validCallers.contains(Thread.currentThread().getStackTrace()[2].getClassName())) {
41 return configDBDatasource;
48 * Init data source basic data source.
50 * @return the basic data source
51 * @throws Exception the exception
53 public static BasicDataSource initDataSource() throws Exception {
54 ImmutableConfiguration dbConfig = ConfigurationRepository.lookup()
55 .getConfigurationFor(Constants.DEFAULT_TENANT, Constants.DB_NAMESPACE);
56 if (StringUtils.isEmpty(dbConfig.getString("dbhost"))) {
59 BasicDataSource datasource = new BasicDataSource();
60 String driverClassName = dbConfig.getString("driverClassName");
61 String jdbcUrl = dbConfig.getString("jdbcURL");
62 if (!isDriverSuitable(driverClassName, jdbcUrl)) {
63 driverClassName = getDriverFor(jdbcUrl);
65 datasource.setDriverClassName(driverClassName);
66 datasource.setUrl(jdbcUrl);
67 String dbuser = dbConfig.getString("dbuser");
68 String dbpassword = dbConfig.getString("dbpassword");
69 if (dbuser != null && dbuser.trim().length() > 0) {
70 datasource.setUsername(dbuser);
72 if (dbpassword != null && dbpassword.trim().length() > 0) {
73 datasource.setPassword(dbpassword);
78 private static boolean isDriverSuitable(String driverClassName, String url) {
79 if (driverClassName == null || driverClassName.trim().length() == 0) {
83 Driver driver = Driver.class.cast(Class.forName(driverClassName).newInstance());
84 return driver.acceptsURL(url);
85 } catch (Exception exception) {
90 private static String getDriverFor(String url) throws Exception {
91 ServiceLoader<Driver> loader = ServiceLoader.load(Driver.class);
92 for (Driver driver : loader) {
93 if (driver.acceptsURL(url)) {
94 return driver.getClass().getName();
97 throw new RuntimeException("No Suitable driver found for " + url);