Examples with XdrOutputStream org.firebirdsql.gds.impl.wire.XdrOutputStream used on opensource projects

Example 21 with XdrOutputStream

use of org.firebirdsql.gds.impl.wire.XdrOutputStream in project jaybird by FirebirdSQL.

the class V10InputBlob method seek.

@Override
public void seek(int offset, SeekMode seekMode) throws SQLException {
    try {
        synchronized (getSynchronizationObject()) {
            checkDatabaseAttached();
            checkTransactionActive();
            final FbWireDatabase database = getDatabase();
            try {
                final XdrOutputStream xdrOut = database.getXdrStreamAccess().getXdrOut();
                xdrOut.writeInt(op_seek_blob);
                xdrOut.writeInt(getHandle());
                xdrOut.writeInt(seekMode.getSeekModeId());
                xdrOut.writeInt(offset);
                xdrOut.flush();
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_write_err).cause(e).toSQLException();
            }
            try {
                database.readResponse(null);
            // object handle in response is the current position in the blob (see .NET provider source)
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_read_err).cause(e).toSQLException();
            }
        }
    } catch (SQLException e) {
        exceptionListenerDispatcher.errorOccurred(e);
        throw e;
    }
}

Example 22 with XdrOutputStream

use of org.firebirdsql.gds.impl.wire.XdrOutputStream in project jaybird by FirebirdSQL.

the class V10InputBlob method getSegment.

@Override
public byte[] getSegment(final int sizeRequested) throws SQLException {
    try {
        if (sizeRequested <= 0) {
            throw new FbExceptionBuilder().exception(jb_blobGetSegmentNegative).messageParameter(sizeRequested).toSQLException();
        }
        // TODO Is this actually a real limitation, or are larger sizes possible?
        int actualSize = 2 + Math.min(sizeRequested, getMaximumSegmentSize());
        synchronized (getSynchronizationObject()) {
            checkDatabaseAttached();
            checkTransactionActive();
            checkBlobOpen();
            final GenericResponse response;
            final FbWireDatabase database = getDatabase();
            try {
                final XdrOutputStream xdrOut = database.getXdrStreamAccess().getXdrOut();
                xdrOut.writeInt(op_get_segment);
                xdrOut.writeInt(getHandle());
                xdrOut.writeInt(actualSize);
                // length of segment send buffer (always 0 in get)
                xdrOut.writeInt(0);
                xdrOut.flush();
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_write_err).cause(e).toSQLException();
            }
            try {
                response = database.readGenericResponse(null);
                // TODO Meaning of 2
                if (response.getObjectHandle() == 2) {
                    // TODO what if I seek on a stream blob?
                    setEof();
                }
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_read_err).cause(e).toSQLException();
            }
            final byte[] responseBuffer = response.getData();
            if (responseBuffer.length == 0) {
                return responseBuffer;
            }
            final ByteArrayOutputStream bos = new ByteArrayOutputStream(actualSize);
            int position = 0;
            while (position < responseBuffer.length) {
                final int segmentLength = iscVaxInteger2(responseBuffer, position);
                position += 2;
                bos.write(responseBuffer, position, segmentLength);
                position += segmentLength;
            }
            return bos.toByteArray();
        }
    } catch (SQLException e) {
        exceptionListenerDispatcher.errorOccurred(e);
        throw e;
    }
}

Example 23 with XdrOutputStream

use of org.firebirdsql.gds.impl.wire.XdrOutputStream in project jaybird by FirebirdSQL.

the class V10InputBlob method open.

// TODO Need blob specific warning callback?
@Override
public void open() throws SQLException {
    try {
        synchronized (getSynchronizationObject()) {
            checkDatabaseAttached();
            checkTransactionActive();
            checkBlobClosed();
            final FbWireDatabase database = getDatabase();
            try {
                final XdrOutputStream xdrOut = database.getXdrStreamAccess().getXdrOut();
                final BlobParameterBuffer blobParameterBuffer = getBlobParameterBuffer();
                if (blobParameterBuffer == null) {
                    xdrOut.writeInt(op_open_blob);
                } else {
                    xdrOut.writeInt(op_open_blob2);
                    xdrOut.writeTyped(blobParameterBuffer);
                }
                xdrOut.writeInt(getTransaction().getHandle());
                xdrOut.writeLong(getBlobId());
                xdrOut.flush();
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_write_err).cause(e).toSQLException();
            }
            try {
                final GenericResponse genericResponse = database.readGenericResponse(null);
                setHandle(genericResponse.getObjectHandle());
                setOpen(true);
                resetEof();
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_read_err).cause(e).toSQLException();
            }
        // TODO Request information on the blob?
        }
    } catch (SQLException e) {
        exceptionListenerDispatcher.errorOccurred(e);
        throw e;
    }
}

Example 24 with XdrOutputStream

use of org.firebirdsql.gds.impl.wire.XdrOutputStream in project jaybird by FirebirdSQL.

the class V10OutputBlob method open.

// TODO Need blob specific warning callback?
@Override
public void open() throws SQLException {
    try {
        synchronized (getSynchronizationObject()) {
            checkDatabaseAttached();
            checkTransactionActive();
            checkBlobClosed();
            if (getBlobId() != FbBlob.NO_BLOB_ID) {
                throw new FbExceptionBuilder().nonTransientException(ISCConstants.isc_segstr_no_op).toSQLException();
            }
            final FbWireDatabase database = getDatabase();
            try {
                final XdrOutputStream xdrOut = database.getXdrStreamAccess().getXdrOut();
                final BlobParameterBuffer blobParameterBuffer = getBlobParameterBuffer();
                if (blobParameterBuffer == null) {
                    xdrOut.writeInt(op_create_blob);
                } else {
                    xdrOut.writeInt(op_create_blob2);
                    xdrOut.writeTyped(blobParameterBuffer);
                }
                xdrOut.writeInt(getTransaction().getHandle());
                xdrOut.writeLong(FbBlob.NO_BLOB_ID);
                xdrOut.flush();
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_write_err).cause(e).toSQLException();
            }
            try {
                final GenericResponse genericResponse = database.readGenericResponse(null);
                setHandle(genericResponse.getObjectHandle());
                setBlobId(genericResponse.getBlobId());
                setOpen(true);
            } catch (IOException e) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_read_err).cause(e).toSQLException();
            }
        // TODO Request information on the blob?
        }
    } catch (SQLException e) {
        exceptionListenerDispatcher.errorOccurred(e);
        throw e;
    }
}

Example 25 with XdrOutputStream

use of org.firebirdsql.gds.impl.wire.XdrOutputStream in project jaybird by FirebirdSQL.

the class V12Database method cancelOperation.

@Override
public void cancelOperation(int kind) throws SQLException {
    try {
        if (kind == ISCConstants.fb_cancel_abort) {
            try {
                // In case of abort we forcibly close the connection
                closeConnection();
            } catch (IOException ioe) {
                throw new SQLNonTransientConnectionException("Connection abort failed", ioe);
            }
        } else {
            checkConnected();
            try {
                // We circumvent the normal xdrOut to minimize the chance of interleaved writes
                // TODO We may still need to do separate write / read synchronization to ensure this works correctly
                final ByteArrayOutputStream out = new ByteArrayOutputStream(8);
                final XdrOutputStream xdr = new XdrOutputStream(out, false);
                xdr.writeInt(WireProtocolConstants.op_cancel);
                xdr.writeInt(kind);
                wireOperations.writeDirect(out.toByteArray());
            } catch (IOException ioe) {
                throw new FbExceptionBuilder().exception(ISCConstants.isc_net_write_err).cause(ioe).toSQLException();
            }
        }
    } catch (SQLException ex) {
        exceptionListenerDispatcher.errorOccurred(ex);
        throw ex;
    }
}