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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.engine.jdbc.spi;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
import org.jboss.logging.Logger;
import org.jboss.logging.Logger.Level;
import org.hibernate.JDBCException;
import org.hibernate.exception.internal.SQLStateConverter;
import org.hibernate.exception.spi.SQLExceptionConverter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.StringHelper;
/**
* Helper for handling SQLExceptions in various manners.
*
* @author Steve Ebersole
*/
public class SqlExceptionHelper {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, SqlExceptionHelper.class.getName());
public static final String DEFAULT_EXCEPTION_MSG = "SQL Exception";
public static final String DEFAULT_WARNING_MSG = "SQL Warning";
public static final SQLExceptionConverter DEFAULT_CONVERTER = new SQLStateConverter(
new ViolatedConstraintNameExtracter() {
public String extractConstraintName(SQLException e) {
return null;
}
}
);
private SQLExceptionConverter sqlExceptionConverter;
/**
* Create an exception helper with a default exception converter.
*/
public SqlExceptionHelper() {
sqlExceptionConverter = DEFAULT_CONVERTER;
}
/**
* Create an exception helper with a specific exception converter.
*
* @param sqlExceptionConverter The exception converter to use.
*/
public SqlExceptionHelper(SQLExceptionConverter sqlExceptionConverter) {
this.sqlExceptionConverter = sqlExceptionConverter;
}
/**
* Access the current exception converter being used internally.
*
* @return The current exception converter.
*/
public SQLExceptionConverter getSqlExceptionConverter() {
return sqlExceptionConverter;
}
/**
* Inject the exception converter to use.
*
* NOTE : null is allowed and signifies to use the default.
*
* @param sqlExceptionConverter The converter to use.
*/
public void setSqlExceptionConverter(SQLExceptionConverter sqlExceptionConverter) {
this.sqlExceptionConverter = ( sqlExceptionConverter == null ? DEFAULT_CONVERTER : sqlExceptionConverter );
}
// SQLException ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Convert an SQLException using the current converter, doing some logging first.
*
* @param sqlException The exception to convert
* @param message An error message.
* @return The converted exception
*/
public JDBCException convert( SQLException sqlException,
String message ) {
return convert(sqlException, message, "n/a");
}
/**
* Convert an SQLException using the current converter, doing some logging first.
*
* @param sqlException The exception to convert
* @param message An error message.
* @param sql The SQL being executed when the exception occurred
* @return The converted exception
*/
public JDBCException convert( SQLException sqlException,
String message,
String sql ) {
logExceptions(sqlException, message + " [" + sql + "]");
return sqlExceptionConverter.convert(sqlException, message, sql);
}
/**
* Log the given (and any nested) exception.
*
* @param sqlException The exception to log
* @param message The message text to use as a preamble.
*/
public void logExceptions( SQLException sqlException,
String message ) {
if (LOG.isEnabled(Level.ERROR)) {
if (LOG.isDebugEnabled()) {
message = StringHelper.isNotEmpty(message) ? message : DEFAULT_EXCEPTION_MSG;
LOG.debug( message, sqlException );
}
final boolean warnEnabled = LOG.isEnabled( Level.WARN );
while (sqlException != null) {
if ( warnEnabled ) {
StringBuilder buf = new StringBuilder(30).append("SQL Error: ").append(sqlException.getErrorCode()).append(", SQLState: ").append(sqlException.getSQLState());
LOG.warn(buf.toString());
}
LOG.error(sqlException.getMessage());
sqlException = sqlException.getNextException();
}
}
}
// SQLWarning ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Contract for handling {@link SQLWarning warnings}
*/
public static interface WarningHandler {
/**
* Should processing be done? Allows short-circuiting if not.
*
* @return True to process warnings, false otherwise.
*/
public boolean doProcess();
/**
* Prepare for processing of a {@link SQLWarning warning} stack.
*
* Note that the warning here is also the first passed to {@link #handleWarning}
*
* @param warning The first warning in the stack.
*/
public void prepare( SQLWarning warning );
/**
* Handle an individual warning in the stack.
*
* @param warning The warning to handle.
*/
public void handleWarning( SQLWarning warning );
}
/**
* Basic support for {@link WarningHandler} implementations which log
*/
public static abstract class WarningHandlerLoggingSupport implements WarningHandler {
public final void handleWarning( SQLWarning warning ) {
StringBuilder buf = new StringBuilder(30).append("SQL Warning Code: ").append(warning.getErrorCode()).append(", SQLState: ").append(warning.getSQLState());
logWarning(buf.toString(), warning.getMessage());
}
/**
* Delegate to log common details of a {@link SQLWarning warning}
*
* @param description A description of the warning
* @param message The warning message
*/
protected abstract void logWarning( String description,
String message );
}
public static class StandardWarningHandler extends WarningHandlerLoggingSupport {
private final String introMessage;
public StandardWarningHandler( String introMessage ) {
this.introMessage = introMessage;
}
public boolean doProcess() {
return LOG.isEnabled(Level.WARN);
}
public void prepare( SQLWarning warning ) {
LOG.debug(introMessage, warning);
}
@Override
protected void logWarning( String description,
String message ) {
LOG.warn(description);
LOG.warn(message);
}
}
public static StandardWarningHandler STANDARD_WARNING_HANDLER = new StandardWarningHandler(DEFAULT_WARNING_MSG);
public void walkWarnings( SQLWarning warning,
WarningHandler handler ) {
if (warning == null || handler.doProcess()) {
return;
}
handler.prepare(warning);
while (warning != null) {
handler.handleWarning(warning);
warning = warning.getNextWarning();
}
}
/**
* Standard (legacy) behavior for logging warnings associated with a JDBC {@link Connection} and clearing them.
*
* Calls {@link #handleAndClearWarnings(Connection, WarningHandler)} using {@link #STANDARD_WARNING_HANDLER}
*
* @param connection The JDBC connection potentially containing warnings
*/
public void logAndClearWarnings( Connection connection ) {
handleAndClearWarnings(connection, STANDARD_WARNING_HANDLER);
}
/**
* General purpose handling of warnings associated with a JDBC {@link Connection}.
*
* @param connection The JDBC connection potentially containing warnings
* @param handler The handler for each individual warning in the stack.
* @see #walkWarnings
*/
@SuppressWarnings( {"ThrowableResultOfMethodCallIgnored"} )
public void handleAndClearWarnings( Connection connection,
WarningHandler handler ) {
try {
walkWarnings(connection.getWarnings(), handler);
} catch (SQLException sqle) {
// workaround for WebLogic
LOG.debug("could not log warnings", sqle);
}
try {
// Sybase fail if we don't do that, sigh...
connection.clearWarnings();
} catch (SQLException sqle) {
LOG.debug("could not clear warnings", sqle);
}
}
/**
* General purpose handling of warnings associated with a JDBC {@link Statement}.
*
* @param statement The JDBC statement potentially containing warnings
* @param handler The handler for each individual warning in the stack.
* @see #walkWarnings
*/
@SuppressWarnings( {"ThrowableResultOfMethodCallIgnored"} )
public void handleAndClearWarnings( Statement statement,
WarningHandler handler ) {
try {
walkWarnings(statement.getWarnings(), handler);
} catch (SQLException sqlException) {
// workaround for WebLogic
LOG.debug("could not log warnings", sqlException);
}
try {
// Sybase fail if we don't do that, sigh...
statement.clearWarnings();
} catch (SQLException sqle) {
LOG.debug("could not clear warnings", sqle);
}
}
}
