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/**
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*
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*/
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package eu.etaxonomy.cdm.database;
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import java.io.PrintWriter;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.sql.Connection;
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import java.sql.DatabaseMetaData;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.SQLFeatureNotSupportedException;
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import java.util.Map;
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import javax.sql.DataSource;
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import org.apache.log4j.Logger;
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import org.hibernate.cache.spi.RegionFactory;
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import org.springframework.beans.factory.config.BeanDefinition;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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import eu.etaxonomy.cdm.config.CdmSourceException;
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import eu.etaxonomy.cdm.model.metadata.CdmMetaData.MetaDataPropertyName;
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import eu.etaxonomy.cdm.model.name.NomenclaturalCode;
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/**
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* This class is a wrapper class to wrap an {@link javax.sql.DataSource} to an
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* {@link ICdmDataSource}. As the former is a very limited interface it is not possible
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* to implement all methods of {@link ICdmDataSource}. However, the aim is
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* to implement all those methods which are usually needed to work with a datasource
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* which represents a connection to a database such as transaction handling and
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* sending queries.
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* Those methods which are not supported by this wrapper class will throw an xxx
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* exception.
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*
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*
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* @author a.mueller
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*/
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//FIXME this class replicates lots of code in CdmDataSourceBase, we may want to merge it
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//in a common helper class to avoid redundant code
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public class WrappedCdmDataSource implements ICdmDataSource {
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private static final Logger logger = Logger.getLogger(WrappedCdmDataSource.class);
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private final DataSource datasource;
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private Connection connection;
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public WrappedCdmDataSource(DataSource datasource) {
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if (datasource == null){
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throw new NullPointerException("datasource must not be null for WrappedCdmDataSource");
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}
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this.datasource = datasource;
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}
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@Override
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public Connection getConnection() throws SQLException {
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Connection existingConnection = getExistingConnection();
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if (existingConnection != null){
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return existingConnection;
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}else{
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return datasource.getConnection();
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}
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}
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public Connection getExistingConnection(){
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return this.connection;
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}
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@Override
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public Connection getConnection(String username, String password) throws SQLException {
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Connection existingConnection = getExistingConnection();
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if (existingConnection != null){
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return existingConnection;
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}else{
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return datasource.getConnection(username, password);
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}
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}
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@Override
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public PrintWriter getLogWriter() throws SQLException {
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return datasource.getLogWriter();
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}
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@Override
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public void setLogWriter(PrintWriter out) throws SQLException {
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datasource.setLogWriter(out);
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}
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@Override
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public void setLoginTimeout(int seconds) throws SQLException {
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datasource.setLoginTimeout(seconds);
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}
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@Override
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public int getLoginTimeout() throws SQLException {
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return datasource.getLoginTimeout();
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}
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@Override
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public java.util.logging.Logger getParentLogger() throws SQLFeatureNotSupportedException {
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return datasource.getParentLogger();
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}
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@Override
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public <T> T unwrap(Class<T> iface) throws SQLException {
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return datasource.unwrap(iface);
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}
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@Override
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public boolean isWrapperFor(Class<?> iface) throws SQLException {
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return datasource.isWrapperFor(iface);
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}
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@Override
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public String getName() {
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throw new UnsupportedOperationException("getName() not supported by WrappedCdmDataSource");
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}
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@Override
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public void setName(String name) {
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throw new UnsupportedOperationException("setName(String) not supported by WrappedCdmDataSource");
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}
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@Override
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public String getServer() {
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//TODO we may want to use client info from connection here
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throw new UnsupportedOperationException("getServer() not supported by WrappedCdmDataSource");
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}
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@Override
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public void setServer(String server) {
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throw new UnsupportedOperationException("setServer() not supported by WrappedCdmDataSource");
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}
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@Override
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public int getPort() {
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//TODO we may want to use client info from connection here
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throw new UnsupportedOperationException("getPort() not supported by WrappedCdmDataSource");
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}
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@Override
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public void setPort(int port) {
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throw new UnsupportedOperationException("setPort(int) not supported by WrappedCdmDataSource");
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}
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@Override
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public NomenclaturalCode getNomenclaturalCode() {
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throw new UnsupportedOperationException("getNomenclaturalCode() not supported by WrappedCdmDataSource");
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}
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@Override
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public void setNomenclaturalCode(NomenclaturalCode nomenclaturalCode) {
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throw new UnsupportedOperationException("setNomenclaturalCode(nc) not supported by WrappedCdmDataSource");
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}
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@Override
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public String getDbSchemaVersion() throws CdmSourceException {
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try {
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return (String)getSingleValue(MetaDataPropertyName.DB_SCHEMA_VERSION.getSqlQuery());
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} catch (SQLException e) {
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throw new CdmSourceException(e.getMessage());
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}
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}
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@Override
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public boolean isDbEmpty() throws CdmSourceException {
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// Any CDM DB should have a schema version
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String dbSchemaVersion = getDbSchemaVersion();
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return (dbSchemaVersion == null || dbSchemaVersion.equals(""));
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}
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@Override
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public boolean checkConnection() throws CdmSourceException {
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try {
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return testConnection();
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} catch (ClassNotFoundException e) {
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throw new CdmSourceException(e.getMessage());
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} catch (SQLException e) {
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throw new CdmSourceException(e.getMessage());
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}
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}
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@Override
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public String getConnectionMessage() {
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try {
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Connection connection = getConnection();
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String message = "Connecting to datasource " + connection.getSchema() + ".";
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return message;
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} catch (SQLException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public void closeOpenConnections() {
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try {
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if(connection != null && !connection.isClosed()){
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connection.close();
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connection = null;
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}
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} catch (SQLException e) {
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logger.error("Error closing the connection");
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}
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}
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@Override
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public Map<MetaDataPropertyName, String> getMetaDataMap() throws CdmSourceException {
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//TODO is it possible/required to build a meta data map here?
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throw new UnsupportedOperationException("getMetaDataMap() not supported by WrappedCdmDataSource");
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}
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@Override
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public BeanDefinition getDatasourceBean() {
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//TODO is it possible/required to build a datasource bean here?
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throw new UnsupportedOperationException("getDatasourceBean() not supported by WrappedCdmDataSource");
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}
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@Override
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public BeanDefinition getHibernatePropertiesBean(DbSchemaValidation hbm2dll) {
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//TODO is it possible/required to build a properties bean here?
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throw new UnsupportedOperationException("getHibernatePropertiesBean() not supported by WrappedCdmDataSource");
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}
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@Override
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public BeanDefinition getHibernatePropertiesBean(DbSchemaValidation hbm2dll,
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Boolean showSql, Boolean formatSql, Boolean registerSearchListener,
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Class<? extends RegionFactory> cacheProviderClass) {
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//TODO is it possible/required to build a properties bean here?
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throw new UnsupportedOperationException("getHibernatePropertiesBean() not supported by WrappedCdmDataSource");
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}
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@Override
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public String getFilePath() {
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throw new UnsupportedOperationException("getFilePath() not supported by WrappedCdmDataSource");
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}
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@Override
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public H2Mode getMode() {
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throw new UnsupportedOperationException("getMode() not supported by WrappedCdmDataSource");
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}
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@Override
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public String getUsername() {
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//TODO maybe this can be implemented by connection meta data
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throw new UnsupportedOperationException("getUsername() not supported by WrappedCdmDataSource");
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}
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@Override
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public String getPassword() {
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throw new UnsupportedOperationException("getPassword() not supported by WrappedCdmDataSource");
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}
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@Override
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public String getDatabase() {
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if(datasource instanceof ComboPooledDataSource) {
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String jdbcUrl = ((ComboPooledDataSource)datasource).getJdbcUrl();
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try {
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return getDatabaseFrom(jdbcUrl);
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} catch (URISyntaxException e) {
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throw new RuntimeException(e);
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}
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} else {
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throw new UnsupportedOperationException("getDatabase() not implemented for " + datasource.getClass() + " in WrappedCdmDataSource");
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}
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}
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/**
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* @param jdbcUrl
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* @return
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* @throws URISyntaxException
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*/
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private String getDatabaseFrom(String jdbcUrl) throws URISyntaxException {
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URI url = new URI(jdbcUrl.substring(5));
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return url.getPath().substring(1);
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}
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@Override
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public void setMode(H2Mode h2Mode) {
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throw new UnsupportedOperationException("setMode(H2Mode) not supported by WrappedCdmDataSource");
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}
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@Override
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public void setUsername(String username) {
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throw new UnsupportedOperationException("setUsername(String) not supported by WrappedCdmDataSource");
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}
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@Override
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public void setPassword(String password) {
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throw new UnsupportedOperationException("setPassword(String) not supported by WrappedCdmDataSource");
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}
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@Override
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public void setDatabase(String database) {
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throw new UnsupportedOperationException("setDatabase(String) not supported by WrappedCdmDataSource");
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}
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@Override
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public DatabaseTypeEnum getDatabaseType() {
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if (this.datasource instanceof ICdmDataSource){
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return ((ICdmDataSource)this.datasource).getDatabaseType();
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}
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try {
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getConnection();
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} catch (SQLException e1) {
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throw new RuntimeException("SQL Exception while trying to establish connection to datasource");
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}
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String driverName = null;
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if (connection != null){
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DatabaseMetaData metaData = null;
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try {
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metaData = connection.getMetaData();
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} catch (SQLException e) {
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throw new RuntimeException("SQL Exception while trying to read datasource metadata");
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}
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try {
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driverName = metaData != null ? metaData.getDriverName() : null;
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} catch (SQLException e) {
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//throw exception at end
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}
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if (metaData != null){
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DatabaseTypeEnum type = DatabaseTypeEnum.byDatabaseMetaData(metaData);
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if (type != null){
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return type;
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}
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}
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throw new IllegalStateException("datasource type (MySQL, SQL Server, ...) could not be retrieved from generic datasource");
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}
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throw new IllegalStateException("datasource type (MySQL, SQL Server, ...) could not be retrieved from generic datasource");
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}
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@Override
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public boolean testConnection() throws ClassNotFoundException, SQLException {
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return getConnection() != null;
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}
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@Override
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public ResultSet executeQuery(String query) throws SQLException {
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PreparedStatement a = getConnection().prepareStatement(query);
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return a.executeQuery();
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}
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@Override
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public int executeUpdate(String sqlUpdate) throws SQLException {
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PreparedStatement a = getConnection().prepareStatement(sqlUpdate);
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return a.executeUpdate();
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}
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@Override
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public void startTransaction() {
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try {
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Connection connection = getConnection();
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this.connection = connection;
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connection.setAutoCommit(false);
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} catch (SQLException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public void commitTransaction() throws SQLException {
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getConnection().commit();
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}
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@Override
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public void rollback() throws SQLException {
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getConnection().rollback();
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}
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@Override
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public Object getSingleValue(String query) throws SQLException {
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ResultSet rs = this.executeQuery(query);
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if (rs.next()){
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int count = rs.getMetaData().getColumnCount();
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if (count > 0){
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return rs.getObject(1);
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}
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}
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return null;
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}
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@Override
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public DatabaseMetaData getMetaData() {
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try {
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return getConnection().getMetaData();
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} catch (SQLException e) {
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throw new RuntimeException(e);
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}
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}
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}
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