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/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* 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.
*/
package com.amazon.carbonado.repo.jdbc;
import java.sql.SQLException;
import com.amazon.carbonado.ConstraintException;
import com.amazon.carbonado.FetchDeadlockException;
import com.amazon.carbonado.FetchException;
import com.amazon.carbonado.FetchTimeoutException;
import com.amazon.carbonado.PersistDeadlockException;
import com.amazon.carbonado.PersistDeniedException;
import com.amazon.carbonado.PersistException;
import com.amazon.carbonado.PersistTimeoutException;
import com.amazon.carbonado.UniqueConstraintException;
import com.amazon.carbonado.spi.ExceptionTransformer;
/**
* Custom exception transform rules.
*
* @author Brian S O'Neill
*/
class JDBCExceptionTransformer extends ExceptionTransformer {
// Getting actual SQLSTATE codes is quite difficult, unless you shell out
// cash for the proper manuals. SQLSTATE codes are five characters long,
// where the first two indicate error class. Although the following links
// are for DB2 SQLSTATE codes, the codes are fairly standard across all
// major database implementations.
//
// ftp://ftp.software.ibm.com/ps/products/db2/info/vr6/htm/db2m0/db2state.htm
// http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/core/r0sttmsg.htm
/** Two digit SQLSTATE class prefix for all constraint violations */
public static String SQLSTATE_CONSTRAINT_VIOLATION_CLASS_CODE = "23";
/**
* Five digit SQLSTATE code for "A violation of the constraint imposed by a
* unique index or a unique constraint occurred"
*/
public static String SQLSTATE_UNIQUE_CONSTRAINT_VIOLATION = "23505";
/**
* Five digit SQLSTATE code for "Deadlock or timeout with automatic
* rollback occurred"
*/
public static String SQLSTATE_DEADLOCK_WITH_ROLLBACK = "40001";
public static String SQLSTATE_PROCESSING_CANCELED = "57014";
/**
* Examines the SQLSTATE code of the given SQL exception and determines if
* it is a generic constaint violation.
*/
public boolean isConstraintError(SQLException e) {
if (e != null) {
String sqlstate = e.getSQLState();
if (sqlstate != null) {
return sqlstate.startsWith(SQLSTATE_CONSTRAINT_VIOLATION_CLASS_CODE);
}
}
return false;
}
/**
* Examines the SQLSTATE code of the given SQL exception and determines if
* it is a unique constaint violation.
*/
public boolean isUniqueConstraintError(SQLException e) {
if (isConstraintError(e)) {
String sqlstate = e.getSQLState();
return SQLSTATE_UNIQUE_CONSTRAINT_VIOLATION.equals(sqlstate);
}
return false;
}
/**
* Examines the SQLSTATE code of the given SQL exception and determines if
* it indicates insufficient privileges.
*/
public boolean isInsufficientPrivilegesError(SQLException e) {
return false;
}
public boolean isDeadlockError(SQLException e) {
if (e != null) {
String sqlstate = e.getSQLState();
if (sqlstate != null) {
return sqlstate.startsWith(SQLSTATE_DEADLOCK_WITH_ROLLBACK);
}
}
return false;
}
public boolean isTimeoutError(SQLException e) {
if (e != null) {
String sqlstate = e.getSQLState();
if (sqlstate != null) {
return SQLSTATE_PROCESSING_CANCELED.equals(sqlstate);
}
}
return false;
}
JDBCExceptionTransformer() {
}
@Override
protected FetchException transformIntoFetchException(Throwable e) {
FetchException fe = super.transformIntoFetchException(e);
if (fe != null) {
return fe;
}
if (e instanceof SQLException) {
SQLException se = (SQLException) e;
if (isDeadlockError(se)) {
return new FetchDeadlockException(e);
}
if (isTimeoutError(se)) {
return new FetchTimeoutException(e);
}
}
return null;
}
@Override
protected PersistException transformIntoPersistException(Throwable e) {
PersistException pe = super.transformIntoPersistException(e);
if (pe != null) {
return pe;
}
if (e instanceof SQLException) {
SQLException se = (SQLException) e;
if (isUniqueConstraintError(se)) {
return new UniqueConstraintException(e);
}
if (isConstraintError(se)) {
return new ConstraintException(e);
}
if (isInsufficientPrivilegesError(se)) {
return new PersistDeniedException(e);
}
if (isDeadlockError(se)) {
return new PersistDeadlockException(e);
}
if (isTimeoutError(se)) {
return new PersistTimeoutException(e);
}
}
return null;
}
}
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