import java.sql.*;
import javax.sql.*;
public class MyJDBCDriver implements Driver {
public Connection connect(String url, Properties info) throws SQLException {
}
}
import org.osgi.framework.*;
public class MyActivator implements BundleActivator {
public void start(BundleContext context) throws Exception {
context.registerService(Driver.class.getName(), new MyJDBCDriver(), null);
}
public void stop(BundleContext context) throws Exception {
}
}
import org.osgi.framework.*;
import java.util.*;
public class MyDatabaseService {
private BundleContext context;
public MyDatabaseService(BundleContext context) {
this.context = context;
}
public Connection getConnection(String url, Properties info) throws SQLException {
ServiceReference<Driver>[] driverRefs = context.getServiceReferences(Driver.class, null);
for (ServiceReference<Driver> ref : driverRefs) {
Driver driver = context.getService(ref);
if (driver.acceptsURL(url)) {
return driver.connect(url, info);
}
}
throw new SQLException("No suitable JDBC driver found for URL: " + url);
}
}
import java.sql.*;
import java.util.*;
public class MyDatabaseServiceClient {
private MyDatabaseService databaseService;
public MyDatabaseServiceClient(MyDatabaseService databaseService) {
this.databaseService = databaseService;
}
public void executeQuery(String sql) throws SQLException {
Properties info = new Properties();
info.put("user", "myuser");
info.put("password", "mypassword");
try (Connection connection = databaseService.getConnection("jdbc:mysql://localhost:3306/mydb", info);
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(sql)) {
}
}
}
