@Override
public int size(final DatabaseTable table) throws DatabaseException {
preOperationCheck();
final StringBuilder sb = new StringBuilder();
sb.append("SELECT COUNT(" + KEY_COLUMN + ") FROM ").append(table.toString());
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
statement = connection.prepareStatement(sb.toString());
resultSet = statement.executeQuery();
if (resultSet.next()) {
return resultSet.getInt(1);
}
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "size operation failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
} finally {
close(statement);
close(resultSet);
}
updateStats(true, false);
return 0;
}
/** INTERNAL: Print SQL onto the stream, using the ExpressionPrinter for context */
public void printSQL(ExpressionSQLPrinter printer) {
if (isAttribute()) {
printer.printField(getAliasedField());
}
// If the mapping is a direct collection then this falls into a gray area.
// It must be treated as an attribute at this moment for it has a direct field.
// However it is not an attribute in the sense that it also represents a foreign
// reference and a mapping criteria has been added.
// For bug 2900974 these are now handled as non-attributes during normalize but
// as attributes when printing SQL.
//
if ((!isAttribute()) && (getMapping() != null) && getMapping().isDirectCollectionMapping()) {
DirectCollectionMapping directCollectionMapping = (DirectCollectionMapping) getMapping();
// The aliased table comes for free as it was a required part of the join criteria.
TableExpression table =
(TableExpression) getTable(directCollectionMapping.getReferenceTable());
DatabaseTable aliasedTable = table.aliasForTable(table.getTable());
DatabaseField aliasedField = (DatabaseField) directCollectionMapping.getDirectField().clone();
aliasedField.setTable(aliasedTable);
printer.printField(aliasedField);
}
if ((getMapping() != null) && getMapping().isNestedTableMapping()) {
DatabaseTable tableAlias = aliasForTable(new NestedTable(this));
printer.printString(tableAlias.getName());
}
}
/** INTERNAL: Find the alias for a given table */
public DatabaseTable aliasForTable(DatabaseTable table) {
DatabaseMapping mapping = getMapping();
if (isAttribute()
|| ((mapping != null)
&& (mapping.isAggregateObjectMapping() || mapping.isTransformationMapping()))) {
return ((DataExpression) getBaseExpression()).aliasForTable(table);
}
// "ref" and "structure" mappings, no table printed in the FROM clause, need to get the table
// alias form the parent table
if ((mapping != null) && (mapping.isReferenceMapping() || mapping.isStructureMapping())) {
DatabaseTable alias =
getBaseExpression().aliasForTable(mapping.getDescriptor().getTables().firstElement());
alias.setName(alias.getName() + "." + mapping.getField().getName());
return alias;
}
// For direct-collection mappings the alias is store on the table expression.
if ((mapping != null) && (mapping.isDirectCollectionMapping())) {
if (tableAliases != null) {
DatabaseTable aliasedTable = tableAliases.keyAtValue(table);
if (aliasedTable != null) {
return aliasedTable;
}
}
return getTable(table).aliasForTable(table);
}
return super.aliasForTable(table);
}
/**
* INTERNAL: Returns the first field from each of the owned tables, used for fine-grained
* pessimistic locking.
*/
protected Vector getForUpdateOfFields() {
Vector allFields = getFields();
int expected = getTableAliases().size();
Vector firstFields = new Vector(expected);
DatabaseTable lastTable = null;
DatabaseField field = null;
int i = 0;
// The following loop takes O(n*m) time. n=# of fields. m=#tables.
// However, in the m=1 case this will take one pass only.
// Also assuming that fields are generally sorted by table, this will
// take O(n) time.
// An even faster way may be to go getDescriptor().getAdditionalPrimaryKeyFields.
while ((i < allFields.size()) && (firstFields.size() < expected)) {
field = (DatabaseField) allFields.elementAt(i++);
if ((lastTable == null) || !field.getTable().equals(lastTable)) {
lastTable = field.getTable();
int j = 0;
while (j < firstFields.size()) {
if (lastTable.equals(((DatabaseField) firstFields.elementAt(j)).getTable())) {
break;
}
j++;
}
if (j == firstFields.size()) {
firstFields.addElement(field);
}
}
}
return firstFields;
}
private static void checkIfTableExists(final Connection connection, final DatabaseTable table)
throws SQLException {
final StringBuilder sb = new StringBuilder();
sb.append("SELECT * FROM ").append(table.toString()).append(" WHERE " + KEY_COLUMN + " = '0'");
Statement statement = null;
ResultSet resultSet = null;
try {
statement = connection.createStatement();
resultSet = statement.executeQuery(sb.toString());
} finally {
close(statement);
close(resultSet);
}
}
private ResultSet init() throws DatabaseException {
final StringBuilder sb = new StringBuilder();
sb.append("SELECT " + KEY_COLUMN + " FROM ").append(table.toString());
try {
final PreparedStatement statement = connection.prepareStatement(sb.toString());
return statement.executeQuery();
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "get iterator failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
}
}
@Override
public String get(final DatabaseTable table, final String key) throws DatabaseException {
if (traceLogging) {
LOGGER.trace("attempting get operation for table=" + table + ", key=" + key);
}
preOperationCheck();
final StringBuilder sb = new StringBuilder();
sb.append("SELECT * FROM ").append(table.toString()).append(" WHERE " + KEY_COLUMN + " = ?");
PreparedStatement statement = null;
ResultSet resultSet = null;
String returnValue = null;
try {
statement = connection.prepareStatement(sb.toString());
statement.setString(1, key);
statement.setMaxRows(1);
resultSet = statement.executeQuery();
if (resultSet.next()) {
returnValue = resultSet.getString(VALUE_COLUMN);
}
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "get operation failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
} finally {
close(statement);
close(resultSet);
}
if (traceLogging) {
final LinkedHashMap<String, Object> debugOutput = new LinkedHashMap<>();
debugOutput.put("table", table);
debugOutput.put("key", key);
debugOutput.put("result", returnValue);
LOGGER.trace(
"get operation result: " + JsonUtil.serializeMap(debugOutput, JsonUtil.Flag.PrettyPrint));
}
updateStats(true, false);
return returnValue;
}
@Override
public boolean remove(final DatabaseTable table, final String key) throws DatabaseException {
if (traceLogging) {
LOGGER.trace("attempting remove operation for table=" + table + ", key=" + key);
}
boolean result = contains(table, key);
if (result) {
final StringBuilder sqlText = new StringBuilder();
sqlText.append("DELETE FROM ").append(table.toString()).append(" WHERE " + KEY_COLUMN + "=?");
PreparedStatement statement = null;
try {
statement = connection.prepareStatement(sqlText.toString());
statement.setString(1, key);
statement.executeUpdate();
LOGGER.trace("remove operation succeeded for table=" + table + ", key=" + key);
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "remove operation failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
} finally {
close(statement);
}
}
if (traceLogging) {
final Map<String, Object> debugOutput = new LinkedHashMap<>();
debugOutput.put("table", table);
debugOutput.put("key", key);
debugOutput.put("result", result);
LOGGER.trace(
"remove operation result: "
+ JsonUtil.serializeMap(debugOutput, JsonUtil.Flag.PrettyPrint));
}
updateStats(true, false);
return result;
}
private synchronized void init() throws DatabaseException {
status = PwmService.STATUS.OPENING;
LOGGER.debug("opening connection to database " + this.dbConfiguration.getConnectionString());
connection = openDB(dbConfiguration);
for (final DatabaseTable table : DatabaseTable.values()) {
initTable(connection, table, dbConfiguration);
}
status = PwmService.STATUS.OPEN;
try {
put(
DatabaseTable.PWM_META,
KEY_ENGINE_START_PREFIX + instanceID,
PwmConstants.DEFAULT_DATETIME_FORMAT.format(new java.util.Date()));
} catch (DatabaseException e) {
final String errorMsg = "error writing engine start time value: " + e.getMessage();
throw new DatabaseException(new ErrorInformation(PwmError.ERROR_DB_UNAVAILABLE, errorMsg));
}
}
@Override
public boolean put(final DatabaseTable table, final String key, final String value)
throws DatabaseException {
preOperationCheck();
if (traceLogging) {
LOGGER.trace("attempting put operation for table=" + table + ", key=" + key);
}
if (!contains(table, key)) {
final String sqlText =
"INSERT INTO "
+ table.toString()
+ "("
+ KEY_COLUMN
+ ", "
+ VALUE_COLUMN
+ ") VALUES(?,?)";
PreparedStatement statement = null;
try {
statement = connection.prepareStatement(sqlText);
statement.setString(1, key);
statement.setString(2, value);
statement.executeUpdate();
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "put operation failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
} finally {
close(statement);
}
return false;
}
final String sqlText =
"UPDATE " + table.toString() + " SET " + VALUE_COLUMN + "=? WHERE " + KEY_COLUMN + "=?";
PreparedStatement statement = null;
try {
statement = connection.prepareStatement(sqlText);
statement.setString(1, value);
statement.setString(2, key);
statement.executeUpdate();
} catch (SQLException e) {
final ErrorInformation errorInformation =
new ErrorInformation(
PwmError.ERROR_DB_UNAVAILABLE, "put operation failed: " + e.getMessage());
lastError = errorInformation;
throw new DatabaseException(errorInformation);
} finally {
close(statement);
}
if (traceLogging) {
final Map<String, Object> debugOutput = new LinkedHashMap<>();
debugOutput.put("table", table);
debugOutput.put("key", key);
debugOutput.put("value", value);
LOGGER.trace(
"put operation result: " + JsonUtil.serializeMap(debugOutput, JsonUtil.Flag.PrettyPrint));
}
updateStats(false, true);
return true;
}
private static void initTable(
final Connection connection, final DatabaseTable table, final DBConfiguration dbConfiguration)
throws DatabaseException {
try {
checkIfTableExists(connection, table);
LOGGER.trace("table " + table + " appears to exist");
} catch (SQLException e) { // assume error was due to table missing;
{
final StringBuilder sqlString = new StringBuilder();
sqlString.append("CREATE table ").append(table.toString()).append(" (").append("\n");
sqlString
.append(" " + KEY_COLUMN + " ")
.append(dbConfiguration.getColumnTypeKey())
.append("(")
.append(KEY_COLUMN_LENGTH)
.append(") NOT NULL PRIMARY KEY,")
.append("\n");
sqlString
.append(" " + VALUE_COLUMN + " ")
.append(dbConfiguration.getColumnTypeValue())
.append(" ");
sqlString.append("\n");
sqlString.append(")").append("\n");
LOGGER.trace(
"attempting to execute the following sql statement:\n " + sqlString.toString());
Statement statement = null;
try {
statement = connection.createStatement();
statement.execute(sqlString.toString());
LOGGER.debug("created table " + table.toString());
} catch (SQLException ex) {
LOGGER.error("error creating new table " + table.toString() + ": " + ex.getMessage());
} finally {
close(statement);
}
}
{
final String indexName = table.toString() + "_IDX";
final StringBuilder sqlString = new StringBuilder();
sqlString.append("CREATE index ").append(indexName);
sqlString.append(" ON ").append(table.toString());
sqlString.append(" (").append(KEY_COLUMN).append(")");
Statement statement = null;
LOGGER.trace(
"attempting to execute the following sql statement:\n " + sqlString.toString());
try {
statement = connection.createStatement();
statement.execute(sqlString.toString());
LOGGER.debug("created index " + indexName);
} catch (SQLException ex) {
LOGGER.error("error creating new index " + indexName + ": " + ex.getMessage());
} finally {
close(statement);
}
}
}
}
