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/* replication_message_type.c - python interface to ReplcationMessage objects
*
* Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
* Copyright (C) 2020 The Psycopg Team
*
* This file is part of psycopg.
*
* psycopg2 is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* In addition, as a special exception, the copyright holders give
* permission to link this program with the OpenSSL library (or with
* modified versions of OpenSSL that use the same license as OpenSSL),
* and distribute linked combinations including the two.
*
* You must obey the GNU Lesser General Public License in all respects for
* all of the code used other than OpenSSL.
*
* psycopg2 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.
*/
#define PSYCOPG_MODULE
#include "psycopg/psycopg.h"
#include "psycopg/replication_message.h"
#include "datetime.h"
RAISES_NEG int
replmsg_datetime_init(void)
{
PyDateTime_IMPORT;
if (!PyDateTimeAPI) {
PyErr_SetString(PyExc_ImportError, "datetime initialization failed");
return -1;
}
return 0;
}
static PyObject *
replmsg_repr(replicationMessageObject *self)
{
return PyString_FromFormat(
"<ReplicationMessage object at %p; data_size: %d; "
"data_start: "XLOGFMTSTR"; wal_end: "XLOGFMTSTR"; send_time: %ld>",
self, self->data_size, XLOGFMTARGS(self->data_start), XLOGFMTARGS(self->wal_end),
(long int)self->send_time);
}
static int
replmsg_init(PyObject *obj, PyObject *args, PyObject *kwargs)
{
PyObject *cur = NULL;
replicationMessageObject *self = (replicationMessageObject *)obj;
if (!PyArg_ParseTuple(
args, "O!O", &cursorType, &cur, &self->payload)) {
return -1;
}
Py_INCREF(cur);
self->cursor = (cursorObject *)cur;
Py_INCREF(self->payload);
self->data_size = 0;
self->data_start = 0;
self->wal_end = 0;
self->send_time = 0;
return 0;
}
static int
replmsg_traverse(replicationMessageObject *self, visitproc visit, void *arg)
{
Py_VISIT((PyObject *)self->cursor);
Py_VISIT(self->payload);
return 0;
}
static int
replmsg_clear(replicationMessageObject *self)
{
Py_CLEAR(self->cursor);
Py_CLEAR(self->payload);
return 0;
}
static void
replmsg_dealloc(PyObject* obj)
{
PyObject_GC_UnTrack(obj);
replmsg_clear((replicationMessageObject*) obj);
Py_TYPE(obj)->tp_free(obj);
}
#define replmsg_send_time_doc \
"send_time - Timestamp of the replication message departure from the server."
static PyObject *
replmsg_get_send_time(replicationMessageObject *self)
{
PyObject *tval, *res = NULL;
double t;
t = (double)self->send_time / USECS_PER_SEC +
((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
tval = Py_BuildValue("(d)", t);
if (tval) {
res = PyDateTime_FromTimestamp(tval);
Py_DECREF(tval);
}
return res;
}
#define OFFSETOF(x) offsetof(replicationMessageObject, x)
/* object member list */
static struct PyMemberDef replicationMessageObject_members[] = {
{"cursor", T_OBJECT, OFFSETOF(cursor), READONLY,
"Related ReplcationCursor object."},
{"payload", T_OBJECT, OFFSETOF(payload), READONLY,
"The actual message data."},
{"data_size", T_INT, OFFSETOF(data_size), READONLY,
"Raw size of the message data in bytes."},
{"data_start", T_ULONGLONG, OFFSETOF(data_start), READONLY,
"LSN position of the start of this message."},
{"wal_end", T_ULONGLONG, OFFSETOF(wal_end), READONLY,
"LSN position of the current end of WAL on the server."},
{NULL}
};
static struct PyGetSetDef replicationMessageObject_getsets[] = {
{ "send_time", (getter)replmsg_get_send_time, NULL,
replmsg_send_time_doc, NULL },
{NULL}
};
/* object type */
#define replicationMessageType_doc \
"A replication protocol message."
PyTypeObject replicationMessageType = {
PyVarObject_HEAD_INIT(NULL, 0)
"psycopg2.extensions.ReplicationMessage",
sizeof(replicationMessageObject), 0,
replmsg_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
(reprfunc)replmsg_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_HAVE_GC, /*tp_flags*/
replicationMessageType_doc, /*tp_doc*/
(traverseproc)replmsg_traverse, /*tp_traverse*/
(inquiry)replmsg_clear, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
0, /*tp_methods*/
replicationMessageObject_members, /*tp_members*/
replicationMessageObject_getsets, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
0, /*tp_dictoffset*/
replmsg_init, /*tp_init*/
0, /*tp_alloc*/
PyType_GenericNew, /*tp_new*/
};
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