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JDBC Driver for the Firebird RDBMS
/*
* Firebird Open Source JavaEE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* 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
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a source control history command.
*
* All rights reserved.
*/
package org.firebirdsql.gds.ng.wire;
import org.firebirdsql.encodings.Encoding;
import org.firebirdsql.gds.ISCConstants;
import org.firebirdsql.gds.JaybirdErrorCodes;
import org.firebirdsql.gds.impl.wire.XdrInputStream;
import org.firebirdsql.gds.impl.wire.XdrOutputStream;
import org.firebirdsql.gds.ng.FbExceptionBuilder;
import org.firebirdsql.gds.ng.IAttachProperties;
import org.firebirdsql.gds.ng.WarningMessageCallback;
import org.firebirdsql.gds.ng.wire.auth.ClientAuthBlock;
import org.firebirdsql.gds.ng.wire.crypt.EncryptionIdentifier;
import org.firebirdsql.logging.Logger;
import org.firebirdsql.logging.LoggerFactory;
import java.io.IOException;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.util.List;
import static org.firebirdsql.gds.ISCConstants.*;
import static org.firebirdsql.gds.impl.wire.WireProtocolConstants.*;
/**
* @author Mark Rotteveel
* @since 3.0
*/
public abstract class AbstractWireOperations implements FbWireOperations {
private static final Logger log = LoggerFactory.getLogger(AbstractWireOperations.class);
private final WireConnection connection;
private final WarningMessageCallback defaultWarningMessageCallback;
private final Object syncObject;
protected AbstractWireOperations(WireConnection connection,
WarningMessageCallback defaultWarningMessageCallback, Object syncObject) {
this.connection = connection;
this.defaultWarningMessageCallback = defaultWarningMessageCallback;
this.syncObject = syncObject;
}
@Override
public final XdrStreamAccess getXdrStreamAccess() {
return connection.getXdrStreamAccess();
}
protected final Encoding getEncoding() {
return connection.getEncoding();
}
/**
* Gets the XdrInputStream.
*
* @return Instance of XdrInputStream
* @throws SQLException
* If no connection is opened or when exceptions occur
* retrieving the InputStream
*/
protected final XdrInputStream getXdrIn() throws SQLException {
return getXdrStreamAccess().getXdrIn();
}
/**
* Gets the XdrOutputStream.
*
* @return Instance of XdrOutputStream
* @throws SQLException
* If no connection is opened or when exceptions occur
* retrieving the OutputStream
*/
protected final XdrOutputStream getXdrOut() throws SQLException {
return getXdrStreamAccess().getXdrOut();
}
@Override
public final SQLException readStatusVector() throws SQLException {
boolean debug = log.isDebugEnabled();
final FbExceptionBuilder builder = new FbExceptionBuilder();
final XdrInputStream xdrIn = getXdrIn();
try {
while (true) {
int arg = xdrIn.readInt();
int errorCode;
switch (arg) {
case isc_arg_gds:
errorCode = xdrIn.readInt();
if (debug) log.debug("readStatusVector arg:isc_arg_gds int: " + errorCode);
if (errorCode != 0) {
builder.exception(errorCode);
}
break;
case isc_arg_warning:
errorCode = xdrIn.readInt();
if (debug) log.debug("readStatusVector arg:isc_arg_warning int: " + errorCode);
if (errorCode != 0) {
builder.warning(errorCode);
}
break;
case isc_arg_interpreted:
case isc_arg_string:
String stringValue = xdrIn.readString(getEncoding());
if (debug) log.debug("readStatusVector string: " + stringValue);
builder.messageParameter(stringValue);
break;
case isc_arg_sql_state:
String sqlState = xdrIn.readString(getEncoding());
if (debug) log.debug("readStatusVector sqlstate: " + sqlState);
builder.sqlState(sqlState);
break;
case isc_arg_number:
int intValue = xdrIn.readInt();
if (debug) log.debug("readStatusVector arg:isc_arg_number int: " + intValue);
builder.messageParameter(intValue);
break;
case isc_arg_end:
if (builder.isEmpty()) {
return null;
}
return builder.toFlatSQLException();
default:
int e = xdrIn.readInt();
if (debug) log.debug("readStatusVector arg: " + arg + " int: " + e);
builder.messageParameter(e);
break;
}
}
} catch (IOException ioe) {
throw new FbExceptionBuilder().exception(ISCConstants.isc_net_read_err).cause(ioe).toSQLException();
}
}
@Override
public final Response readResponse(WarningMessageCallback warningCallback) throws SQLException, IOException {
Response response = readSingleResponse(warningCallback);
processResponse(response);
return response;
}
@Override
public final Response readOperationResponse(int operationCode, WarningMessageCallback warningCallback)
throws SQLException, IOException {
Response response = processOperation(operationCode);
processResponseWarnings(response, warningCallback);
processResponse(response);
return response;
}
@Override
public final Response readSingleResponse(WarningMessageCallback warningCallback) throws SQLException, IOException {
Response response = processOperation(readNextOperation());
processResponseWarnings(response, warningCallback);
return response;
}
/**
* Reads the next operation. Forwards call to {@link WireConnection#readNextOperation()}.
*
* @return next operation
* @throws java.io.IOException For errors reading the operation from the connection
*/
public final int readNextOperation() throws IOException {
synchronized (syncObject) {
processDeferredActions();
return connection.readNextOperation();
}
}
/**
* Reads the response based on the specified operation.
*
* @param operation
* Database operation
* @return Response object for the operation
* @throws SQLException
* For errors reading the response from the connection.
* @throws IOException
* For errors reading the response from the connection.
*/
protected final Response processOperation(int operation) throws SQLException, IOException {
final XdrInputStream xdrIn = getXdrIn();
switch (operation) {
case op_response:
return new GenericResponse(xdrIn.readInt(), xdrIn.readLong(), xdrIn.readBuffer(), readStatusVector());
case op_fetch_response:
return new FetchResponse(xdrIn.readInt(), xdrIn.readInt());
case op_sql_response:
return new SqlResponse(xdrIn.readInt());
default:
throw new FbExceptionBuilder().nonTransientException(JaybirdErrorCodes.jb_unexpectedOperationCode)
.messageParameter(operation)
.messageParameter("processOperation")
.toFlatSQLException();
}
}
/**
* @param response
* Response to process
* @throws java.sql.SQLException
* For errors returned from the server.
*/
public final void processResponse(Response response) throws SQLException {
if (response instanceof GenericResponse) {
GenericResponse genericResponse = (GenericResponse) response;
SQLException exception = genericResponse.getException();
if (exception != null && !(exception instanceof SQLWarning)) {
throw exception;
}
}
}
/**
* Checks if the response included a warning and signals that warning to the
* WarningMessageCallback.
*
* @param response
* Response to process
*/
public final void processResponseWarnings(final Response response, WarningMessageCallback warningCallback) {
if (warningCallback == null) {
warningCallback = defaultWarningMessageCallback;
}
if (response instanceof GenericResponse) {
GenericResponse genericResponse = (GenericResponse) response;
@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
SQLException exception = genericResponse.getException();
if (exception != null && exception instanceof SQLWarning) {
warningCallback.processWarning((SQLWarning) exception);
}
}
}
@Override
public final GenericResponse readGenericResponse(WarningMessageCallback warningCallback)
throws SQLException, IOException {
return (GenericResponse) readResponse(warningCallback);
}
@Override
public final SqlResponse readSqlResponse(WarningMessageCallback warningCallback) throws SQLException, IOException {
return (SqlResponse) readResponse(warningCallback);
}
@Override
public final void consumePackets(int numberOfResponses, WarningMessageCallback warningCallback) {
while (numberOfResponses > 0) {
numberOfResponses--;
try {
readResponse(warningCallback);
} catch (Exception e) {
warningCallback.processWarning(new SQLWarning(e));
// ignoring exceptions
log.warn("Exception in consumePackets", e);
}
}
}
@Override
public final void writeDirect(byte[] data) throws IOException {
connection.writeDirect(data);
}
protected final Object getSynchronizationObject() {
return syncObject;
}
protected final void addServerKeys(byte[] serverKeys) throws SQLException {
connection.addServerKeys(serverKeys);
}
protected final void clearServerKeys() {
connection.clearServerKeys();
}
protected final ClientAuthBlock getClientAuthBlock() {
return connection.getClientAuthBlock();
}
/**
* @return Immutable attach properties
*/
protected final IAttachProperties getAttachProperties() {
return connection.getAttachProperties().asImmutable();
}
protected final List getEncryptionIdentifiers() {
return connection.getEncryptionIdentifiers();
}
protected final WireConnection getConnection() {
return connection;
}
protected final WarningMessageCallback getDefaultWarningMessageCallback() {
return defaultWarningMessageCallback;
}
}
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