[cx-oracle-users] Problem with query subscription using oracle 11.2.0.3
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[cx-oracle-users] Problem with query subscription using oracle 11.2.0.3
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From: Northrup, C. T <Car...@bo...> - 2013-06-18 22:54:27
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//-----------------------------------------------------------------------------
// Subscription.c
// Defines the routines for handling Oracle subscription information.
//-----------------------------------------------------------------------------
#include <sys/unistd.h>
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
//-----------------------------------------------------------------------------
// structures used for handling subscriptions
//-----------------------------------------------------------------------------
typedef struct {
PyObject_HEAD
OCISubscription *handle;
udt_Connection *connection;
PyObject *callback;
ub4 namespace;
ub4 protocol;
ub4 port;
ub4 timeout;
ub4 operations;
ub4 rowids;
} udt_Subscription;
typedef struct {
PyObject_HEAD
ub4 type;
PyObject *dbname;
PyObject *tables;
} udt_Message;
typedef struct {
PyObject_HEAD
PyObject *name;
PyObject *rows;
ub4 operation;
} udt_MessageTable;
typedef struct {
PyObject_HEAD
PyObject *rowid;
ub4 operation;
} udt_MessageRow;
static char* getIpAddr();
//-----------------------------------------------------------------------------
// Declaration of subscription functions
//-----------------------------------------------------------------------------
static void Subscription_Free(udt_Subscription*);
static PyObject *Subscription_Repr(udt_Subscription*);
static PyObject *Subscription_RegisterQuery(udt_Subscription*, PyObject*);
static void Message_Free(udt_Message*);
static void MessageTable_Free(udt_MessageTable*);
static void MessageRow_Free(udt_MessageRow*);
//-----------------------------------------------------------------------------
// declaration of members for Python types
//-----------------------------------------------------------------------------
static PyMemberDef g_SubscriptionTypeMembers[] = {
{ "callback", T_OBJECT, offsetof(udt_Subscription, callback), READONLY },
{ "connection", T_OBJECT, offsetof(udt_Subscription, connection),
READONLY },
{ "namespace", T_INT, offsetof(udt_Subscription, namespace), READONLY },
{ "protocol", T_INT, offsetof(udt_Subscription, protocol), READONLY },
{ "port", T_INT, offsetof(udt_Subscription, port), READONLY },
{ "timeout", T_INT, offsetof(udt_Subscription, timeout), READONLY },
{ "operations", T_INT, offsetof(udt_Subscription, operations), READONLY },
{ "rowids", T_BOOL, offsetof(udt_Subscription, rowids), READONLY },
{ NULL }
};
static PyMemberDef g_MessageTypeMembers[] = {
{ "type", T_INT, offsetof(udt_Message, type), READONLY },
{ "dbname", T_OBJECT, offsetof(udt_Message, dbname), READONLY },
{ "tables", T_OBJECT, offsetof(udt_Message, tables), READONLY },
{ NULL }
};
static PyMemberDef g_MessageTableTypeMembers[] = {
{ "name", T_OBJECT, offsetof(udt_MessageTable, name), READONLY },
{ "rows", T_OBJECT, offsetof(udt_MessageTable, rows), READONLY },
{ "operation", T_INT, offsetof(udt_MessageTable, operation), READONLY },
{ NULL }
};
static PyMemberDef g_MessageRowTypeMembers[] = {
{ "rowid", T_OBJECT, offsetof(udt_MessageRow, rowid), READONLY },
{ "operation", T_INT, offsetof(udt_MessageRow, operation), READONLY },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of methods for Python types
//-----------------------------------------------------------------------------
static PyMethodDef g_SubscriptionTypeMethods[] = {
{ "registerquery", (PyCFunction) Subscription_RegisterQuery,
METH_VARARGS },
{ NULL, NULL }
};
//-----------------------------------------------------------------------------
// Python type declarations
//-----------------------------------------------------------------------------
static PyTypeObject g_SubscriptionType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.Subscription", // tp_name
sizeof(udt_Subscription), // tp_basicsize
0, // tp_itemsize
(destructor) Subscription_Free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
(reprfunc) Subscription_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, // tp_flags
0, // tp_doc
0, // tp_traverse
0, // tp_clear
0, // tp_richcompare
0, // tp_weaklistoffset
0, // tp_iter
0, // tp_iternext
g_SubscriptionTypeMethods, // tp_methods
g_SubscriptionTypeMembers, // tp_members
0, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
0, // tp_init
0, // tp_alloc
0, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
static PyTypeObject g_MessageType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.Message", // tp_name
sizeof(udt_Message), // tp_basicsize
0, // tp_itemsize
(destructor) Message_Free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // 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, // tp_flags
0, // tp_doc
0, // tp_traverse
0, // tp_clear
0, // tp_richcompare
0, // tp_weaklistoffset
0, // tp_iter
0, // tp_iternext
0, // tp_methods
g_MessageTypeMembers, // tp_members
0, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
0, // tp_init
0, // tp_alloc
0, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
static PyTypeObject g_MessageTableType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.MessageTable", // tp_name
sizeof(udt_MessageTable), // tp_basicsize
0, // tp_itemsize
(destructor) MessageTable_Free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // 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, // tp_flags
0, // tp_doc
0, // tp_traverse
0, // tp_clear
0, // tp_richcompare
0, // tp_weaklistoffset
0, // tp_iter
0, // tp_iternext
0, // tp_methods
g_MessageTableTypeMembers, // tp_members
0, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
0, // tp_init
0, // tp_alloc
0, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
static PyTypeObject g_MessageRowType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.MessageRow", // tp_name
sizeof(udt_MessageRow), // tp_basicsize
0, // tp_itemsize
(destructor) MessageRow_Free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // 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, // tp_flags
0, // tp_doc
0, // tp_traverse
0, // tp_clear
0, // tp_richcompare
0, // tp_weaklistoffset
0, // tp_iter
0, // tp_iternext
0, // tp_methods
g_MessageRowTypeMembers, // tp_members
0, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
0, // tp_init
0, // tp_alloc
0, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
//-----------------------------------------------------------------------------
// MessageRow_Initialize()
// Initialize a new message row with the information from the descriptor.
//-----------------------------------------------------------------------------
static int MessageRow_Initialize(
udt_MessageRow *self, // object to initialize
udt_Environment *env, // environment to use
dvoid *descriptor) // descriptor to get information from
{
ub4 rowidLength;
sword status;
char *rowid;
// determine operation
status = OCIAttrGet(descriptor, OCI_DTYPE_ROW_CHDES, &self->operation,
NULL, OCI_ATTR_CHDES_ROW_OPFLAGS, env->errorHandle);
if (Environment_CheckForError(env, status,
"MessageRow_Initialize(): get operation") < 0)
return -1;
// determine table name
status = OCIAttrGet(descriptor, OCI_DTYPE_ROW_CHDES, &rowid, &rowidLength,
OCI_ATTR_CHDES_ROW_ROWID, env->errorHandle);
if (Environment_CheckForError(env, status,
"MessageRow_Initialize(): get rowid") < 0)
return -1;
self->rowid = cxString_FromEncodedString(rowid, rowidLength,
env->encoding);
if (!self->rowid)
return -1;
return 0;
}
//-----------------------------------------------------------------------------
// MessageTable_Initialize()
// Initialize a new message table with the information from the descriptor.
//-----------------------------------------------------------------------------
static int MessageTable_Initialize(
udt_MessageTable *self, // object to initialize
udt_Environment *env, // environment to use
dvoid *descriptor) // descriptor to get information from
{
dvoid **rowDescriptor, *indicator;
ub4 nameLength, i;
udt_MessageRow *row;
boolean exists;
OCIColl *rows;
sword status;
sb4 numRows;
char *name;
// determine operation
status = OCIAttrGet(descriptor, OCI_DTYPE_TABLE_CHDES, &self->operation,
NULL, OCI_ATTR_CHDES_TABLE_OPFLAGS, env->errorHandle);
if (Environment_CheckForError(env, status,
"MessageTable_Initialize(): get operation") < 0)
return -1;
// determine table name
status = OCIAttrGet(descriptor, OCI_DTYPE_TABLE_CHDES, &name, &nameLength,
OCI_ATTR_CHDES_TABLE_NAME, env->errorHandle);
if (Environment_CheckForError(env, status,
"MessageTable_Initialize(): get table name") < 0)
return -1;
self->name = cxString_FromEncodedString(name, nameLength, env->encoding);
if (!self->name)
return -1;
// if change invalidated all rows, nothing to do
if (self->operation & OCI_OPCODE_ALLROWS)
return 0;
// determine rows collection
status = OCIAttrGet(descriptor, OCI_DTYPE_TABLE_CHDES, &rows, NULL,
OCI_ATTR_CHDES_TABLE_ROW_CHANGES, env->errorHandle);
if (Environment_CheckForError(env, status,
"MessageTable_Initialize(): get rows collection") < 0)
return -1;
// determine number of rows in collection
status = OCICollSize(env->handle, env->errorHandle, rows, &numRows);
if (Environment_CheckForError(env, status,
"MessageTable_Initialize(): get size of rows collection") < 0)
return -1;
// populate the rows attribute
self->rows = PyList_New(numRows);
if (!self->rows)
return -1;
for (i = 0; i < numRows; i++) {
status = OCICollGetElem(env->handle, env->errorHandle, rows, i,
&exists, (dvoid*) &rowDescriptor, &indicator);
if (Environment_CheckForError(env, status,
"MessageTable_Initialize(): get element from collection") < 0)
return -1;
row = (udt_MessageRow*)
g_MessageRowType.tp_alloc(&g_MessageRowType, 0);
if (!row)
return -1;
PyList_SET_ITEM(self->rows, i, (PyObject*) row);
if (MessageRow_Initialize(row, env, *rowDescriptor) < 0)
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// Message_Initialize()
// Initialize a new message with the information from the descriptor.
//-----------------------------------------------------------------------------
static int Message_Initialize(
udt_Message *self, // object to initialize
udt_Environment *env, // environment to use
dvoid *descriptor) // descriptor to get information from
{
dvoid **tableDescriptor, *indicator;
udt_MessageTable *table;
ub4 dbnameLength, i;
OCIColl *tables;
boolean exists;
sb4 numTables;
char *dbname;
sword status;
// determine type
status = OCIAttrGet(descriptor, OCI_DTYPE_CHDES, &self->type, NULL,
OCI_ATTR_CHDES_NFYTYPE, env->errorHandle);
if (Environment_CheckForError(env, status,
"Message_Initialize(): get type") < 0)
return -1;
// determine database name
status = OCIAttrGet(descriptor, OCI_DTYPE_CHDES, &dbname, &dbnameLength,
OCI_ATTR_CHDES_DBNAME, env->errorHandle);
if (Environment_CheckForError(env, status,
"Message_Initialize(): get database name") < 0)
return -1;
self->dbname = cxString_FromEncodedString(dbname, dbnameLength,
env->encoding);
if (!self->dbname)
return -1;
// determine table collection
status = OCIAttrGet(descriptor, OCI_DTYPE_CHDES, &tables, NULL,
OCI_ATTR_CHDES_TABLE_CHANGES, env->errorHandle);
if (Environment_CheckForError(env, status,
"Message_Initialize(): get tables collection") < 0)
return -1;
// determine number of tables
if (!tables)
numTables = 0;
else {
status = OCICollSize(env->handle, env->errorHandle, tables,
&numTables);
if (Environment_CheckForError(env, status,
"Message_Initialize(): get size of collection") < 0)
return -1;
}
// create list to hold results
self->tables = PyList_New(numTables);
if (!self->tables)
return -1;
// populate each entry with a message table instance
for (i = 0; i < numTables; i++) {
status = OCICollGetElem(env->handle, env->errorHandle, tables, i,
&exists, (dvoid*) &tableDescriptor, &indicator);
if (Environment_CheckForError(env, status,
"Message_Initialize(): get element from collection") < 0)
return -1;
table = (udt_MessageTable*)
g_MessageTableType.tp_alloc(&g_MessageTableType, 0);
if (!table)
return -1;
PyList_SET_ITEM(self->tables, i, (PyObject*) table);
if (MessageTable_Initialize(table, env, *tableDescriptor) < 0)
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// Subscription_CallbackHandler()
// Routine that performs the actual call.
//-----------------------------------------------------------------------------
static int Subscription_CallbackHandler(
udt_Subscription *self, // subscription object
udt_Environment *env, // environment to use
dvoid *descriptor) // descriptor to get information from
{
PyObject *result, *args;
udt_Message *message;
// create the message
message = (udt_Message*) g_MessageType.tp_alloc(&g_MessageType, 0);
if (!message)
return -1;
if (Message_Initialize(message, env, descriptor) < 0) {
Py_DECREF(message);
return -1;
}
// create the arguments for the call
args = PyTuple_Pack(1, message);
Py_DECREF(message);
if (!args)
return -1;
// make the actual call
result = PyObject_Call(self->callback, args, NULL);
Py_DECREF(args);
if (!result)
return -1;
Py_DECREF(result);
return 0;
}
//-----------------------------------------------------------------------------
// Subscription_Callback()
// Routine that is called when a callback needs to be invoked.
//-----------------------------------------------------------------------------
static void Subscription_Callback(
udt_Subscription *self, // subscription object
OCISubscription *handle, // subscription handle
dvoid *payload, // payload
ub4 *payloadLength, // payload length
dvoid *descriptor, // descriptor
ub4 mode) // mode used
{
#ifdef WITH_THREAD
PyGILState_STATE gstate = PyGILState_Ensure();
#endif
udt_Environment *env;
// perform the call
env = Environment_NewFromScratch(0, 0, NULL, NULL);
if (!env)
PyErr_Print();
else {
if (Subscription_CallbackHandler(self, env, descriptor) < 0)
PyErr_Print();
Py_DECREF(env);
}
// restore thread state, if necessary
#ifdef WITH_THREAD
PyGILState_Release(gstate);
#endif
}
//-----------------------------------------------------------------------------
// Subscription_Register()
// Register the subscription.
//-----------------------------------------------------------------------------
static int Subscription_Register(
udt_Subscription *self) // subscription to register
{
udt_Environment *env;
sword status;
// create the subscription handle
env = self->connection->environment;
status = OCIHandleAlloc(env->handle, (dvoid**) &self->handle,
OCI_HTYPE_SUBSCRIPTION, 0, 0);
if (Environment_CheckForError(env, status,
"Subscription_Register(): allocate handle") < 0)
return -1;
// set the namespace
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) &self->namespace, sizeof(ub4), OCI_ATTR_SUBSCR_NAMESPACE,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set namespace") < 0)
return -1;
// set the protocol
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) &self->protocol, sizeof(ub4), OCI_ATTR_SUBSCR_RECPTPROTO,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set protocol") < 0)
return -1;
// set the timeout
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) &self->timeout, sizeof(ub4), OCI_ATTR_SUBSCR_TIMEOUT,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set timeout") < 0)
return -1;
// set the IP address
char* ip_addr = getIpAddr(); // "134.51.168.81";
printf("using ip : %s\n", ip_addr);
status = OCIAttrSet(env->handle, OCI_HTYPE_ENV,
(dvoid *) ip_addr, (ub4) strlen(ip_addr),
OCI_ATTR_SUBSCR_IPADDR, env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set ipaddr") < 0)
return -1;
// set the TCP port used on client to listen for callback from DB server
if (self->port > 0) {
status = OCIAttrSet(env->handle, OCI_HTYPE_ENV,
(dvoid*) &(self->port), (ub4) 0, OCI_ATTR_SUBSCR_PORTNO,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set port") < 0)
return -1;
}
// set the context for the callback
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) self, 0, OCI_ATTR_SUBSCR_CTX, env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set context") < 0)
return -1;
// set the callback, if applicable
if (self->callback) {
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) Subscription_Callback, 0, OCI_ATTR_SUBSCR_CALLBACK,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set callback") < 0)
return -1;
}
// set whether or not rowids are desired
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) &self->rowids, sizeof(ub4), OCI_ATTR_CHNF_ROWIDS,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set rowids") < 0)
return -1;
// set which operations are desired
status = OCIAttrSet(self->handle, OCI_HTYPE_SUBSCRIPTION,
(dvoid*) &self->operations, sizeof(ub4), OCI_ATTR_CHNF_OPERATIONS,
env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_Register(): set operations") < 0)
return -1;
// register the subscription
Py_BEGIN_ALLOW_THREADS
status = OCISubscriptionRegister(self->connection->handle,
&self->handle, 1, env->errorHandle, OCI_DEFAULT);
Py_END_ALLOW_THREADS
if (Environment_CheckForError(env, status,
"Subscription_Register(): register") < 0)
return -1;
return 0;
}
//-----------------------------------------------------------------------------
// Subscription_New()
// Allocate a new subscription object.
//-----------------------------------------------------------------------------
static udt_Subscription *Subscription_New(
udt_Connection *connection, // connection object
ub4 namespace, // namespace to use
ub4 protocol, // protocol to use
ub4 port, // client port for callbacks
PyObject *callback, // callback routine
ub4 timeout, // timeout (in seconds)
ub4 operations, // operations to notify
int rowids) // retrieve rowids?
{
udt_Subscription *self;
self = (udt_Subscription*)
g_SubscriptionType.tp_alloc(&g_SubscriptionType, 0);
if (!self)
return NULL;
Py_INCREF(connection);
self->connection = connection;
Py_XINCREF(callback);
self->callback = callback;
self->namespace = namespace;
self->protocol = protocol;
self->port = port;
self->timeout = timeout;
self->rowids = rowids;
self->operations = operations;
self->handle = NULL;
if (Subscription_Register(self) < 0) {
Py_DECREF(self);
return NULL;
}
return self;
}
//-----------------------------------------------------------------------------
// Subscription_Free()
// Free the memory associated with a subscription.
//-----------------------------------------------------------------------------
static void Subscription_Free(
udt_Subscription *self) // subscription to free
{
if (self->handle)
OCISubscriptionUnRegister(self->connection->handle,
self->handle, self->connection->environment->errorHandle,
OCI_DEFAULT);
Py_CLEAR(self->connection);
Py_CLEAR(self->callback);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// Subscription_Repr()
// Return a string representation of the subscription.
//-----------------------------------------------------------------------------
static PyObject *Subscription_Repr(
udt_Subscription *subscription) // subscription to repr
{
PyObject *connectionRepr, *module, *name, *result, *format, *formatArgs;
format = cxString_FromAscii("<%s.%s on %s>");
if (!format)
return NULL;
connectionRepr = PyObject_Repr((PyObject*) subscription->connection);
if (!connectionRepr) {
Py_DECREF(format);
return NULL;
}
if (GetModuleAndName(Py_TYPE(subscription), &module, &name) < 0) {
Py_DECREF(format);
Py_DECREF(connectionRepr);
return NULL;
}
formatArgs = PyTuple_Pack(3, module, name, connectionRepr);
Py_DECREF(module);
Py_DECREF(name);
Py_DECREF(connectionRepr);
if (!formatArgs) {
Py_DECREF(format);
return NULL;
}
result = cxString_Format(format, formatArgs);
Py_DECREF(format);
Py_DECREF(formatArgs);
return result;
}
//-----------------------------------------------------------------------------
// Subscription_RegisterQuery()
// Register a query for database change notification.
//-----------------------------------------------------------------------------
static PyObject *Subscription_RegisterQuery(
udt_Subscription *self, // subscription to use
PyObject *args) // arguments
{
PyObject *statement, *executeArgs;
udt_Buffer statementBuffer;
udt_Environment *env;
udt_Cursor *cursor;
sword status;
// parse arguments
executeArgs = NULL;
if (!PyArg_ParseTuple(args, "O!|O", cxString_Type, &statement,
&executeArgs))
return NULL;
if (executeArgs) {
if (!PyDict_Check(executeArgs) && !PySequence_Check(executeArgs)) {
PyErr_SetString(PyExc_TypeError,
"expecting a dictionary or sequence");
return NULL;
}
}
// create cursor to perform query
env = self->connection->environment;
cursor = (udt_Cursor*) Connection_NewCursor(self->connection, NULL);
if (!cursor)
return NULL;
// allocate the handle so the subscription handle can be set
if (Cursor_AllocateHandle(cursor) < 0) {
Py_DECREF(cursor);
return NULL;
}
// prepare the statement for execution
if (cxBuffer_FromObject(&statementBuffer, statement,
env->encoding) < 0) {
Py_DECREF(cursor);
return NULL;
}
status = OCIStmtPrepare(cursor->handle, env->errorHandle,
(text*) statementBuffer.ptr, statementBuffer.size, OCI_NTV_SYNTAX,
OCI_DEFAULT);
cxBuffer_Clear(&statementBuffer);
if (Environment_CheckForError(env, status,
"Subscription_RegisterQuery(): prepare statement") < 0) {
Py_DECREF(cursor);
return NULL;
}
// perform binds
if (executeArgs && Cursor_SetBindVariables(cursor, executeArgs, 1, 0,
0) < 0) {
Py_DECREF(cursor);
return NULL;
}
if (Cursor_PerformBind(cursor) < 0) {
Py_DECREF(cursor);
return NULL;
}
// parse the query in order to get the defined variables
Py_BEGIN_ALLOW_THREADS
status = OCIStmtExecute(self->connection->handle, cursor->handle,
env->errorHandle, 0, 0, 0, 0, OCI_DESCRIBE_ONLY);
Py_END_ALLOW_THREADS
if (Environment_CheckForError(env, status,
"Subscription_RegisterQuery(): parse statement") < 0) {
Py_DECREF(cursor);
return NULL;
}
// perform define as needed
if (Cursor_PerformDefine(cursor) < 0) {
Py_DECREF(cursor);
return NULL;
}
// set the subscription handle
status = OCIAttrSet(cursor->handle, OCI_HTYPE_STMT, self->handle, 0,
OCI_ATTR_CHNF_REGHANDLE, env->errorHandle);
if (Environment_CheckForError(env, status,
"Subscription_RegisterQuery(): set subscription handle") < 0) {
Py_DECREF(cursor);
return NULL;
}
// execute the query which registers it
if (Cursor_InternalExecute(cursor, 0) < 0) {
Py_DECREF(cursor);
return NULL;
}
Py_DECREF(cursor);
Py_INCREF(Py_None);
return Py_None;
}
//-----------------------------------------------------------------------------
// Message_Free()
// Free the memory associated with a message.
//-----------------------------------------------------------------------------
static void Message_Free(
udt_Message *self) // object to free
{
Py_CLEAR(self->dbname);
Py_CLEAR(self->tables);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// MessageTable_Free()
// Free the memory associated with a table in a message.
//-----------------------------------------------------------------------------
static void MessageTable_Free(
udt_MessageTable *self) // object to free
{
Py_CLEAR(self->name);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// MessageRow_Free()
// Free the memory associated with a row in a message.
//-----------------------------------------------------------------------------
static void MessageRow_Free(
udt_MessageRow *self) // object to free
{
Py_CLEAR(self->rowid);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// getIpAddr()
// Gets the IP address of eth0 to use with subscription registration
//-----------------------------------------------------------------------------
static char* getIpAddr()
{
char* ipaddr = "127.0.0.1"; //"134.51.168.81";
struct ifaddrs * ifAddrStruct=NULL;
struct ifaddrs * ifa=NULL;
void * tmpAddrPtr=NULL;
getifaddrs(&ifAddrStruct);
for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa ->ifa_addr->sa_family==AF_INET) { // check it is IP4
// is a valid IP4 Address
tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
char addressBuffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
//printf("%s IP Address %s\n", ifa->ifa_name, addressBuffer);
//use the eth0 interface
if(strncmp(ifa->ifa_name, "eth0", 50) == 0) {
ipaddr = addressBuffer;
//printf("returning '%s'\n", ipaddr);
return ipaddr;
}
}
/* add back to support IP_V6
else if (ifa->ifa_addr->sa_family==AF_INET6) { // check it is IP6
// is a valid IP6 Address
tmpAddrPtr=&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
char addressBuffer[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
printf("%s IP Address %s\n", ifa->ifa_name, addressBuffer);
}
*/
}
return ipaddr;
}
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