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1443 lines (1258 loc) · 54.5 KB
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//-----------------------------------------------------------------------------
// Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
//
// Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
//
// Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
// Canada. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Connection.c
// Definition of the Python type OracleConnection.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// structure for the Python type "Connection"
//-----------------------------------------------------------------------------
typedef struct {
PyObject_HEAD
dpiConn *handle;
udt_SessionPool *sessionPool;
PyObject *inputTypeHandler;
PyObject *outputTypeHandler;
PyObject *username;
PyObject *dsn;
PyObject *version;
dpiEncodingInfo encodingInfo;
int autocommit;
} udt_Connection;
//-----------------------------------------------------------------------------
// functions for the Python type "Connection"
//-----------------------------------------------------------------------------
static void Connection_Free(udt_Connection*);
static PyObject *Connection_New(PyTypeObject*, PyObject*, PyObject*);
static int Connection_Init(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Repr(udt_Connection*);
static PyObject *Connection_Close(udt_Connection*, PyObject*);
static PyObject *Connection_Commit(udt_Connection*, PyObject*);
static PyObject *Connection_Begin(udt_Connection*, PyObject*);
static PyObject *Connection_Prepare(udt_Connection*, PyObject*);
static PyObject *Connection_Rollback(udt_Connection*, PyObject*);
static PyObject *Connection_NewCursor(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Cancel(udt_Connection*, PyObject*);
static PyObject *Connection_GetVersion(udt_Connection*, void*);
static PyObject *Connection_GetEncoding(udt_Connection*, void*);
static PyObject *Connection_GetNationalEncoding(udt_Connection*, void*);
static PyObject *Connection_GetMaxBytesPerCharacter(udt_Connection*, void*);
static PyObject *Connection_ContextManagerEnter(udt_Connection*, PyObject*);
static PyObject *Connection_ContextManagerExit(udt_Connection*, PyObject*);
static PyObject *Connection_ChangePassword(udt_Connection*, PyObject*);
static PyObject *Connection_GetType(udt_Connection*, PyObject*);
static PyObject *Connection_GetStmtCacheSize(udt_Connection*, void*);
static PyObject *Connection_NewEnqueueOptions(udt_Connection*, PyObject*);
static PyObject *Connection_NewDequeueOptions(udt_Connection*, PyObject*);
static PyObject *Connection_NewMessageProperties(udt_Connection*, PyObject*);
static PyObject *Connection_Dequeue(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Enqueue(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Ping(udt_Connection*, PyObject*);
static PyObject *Connection_Shutdown(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Startup(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_Subscribe(udt_Connection*, PyObject*, PyObject*);
static PyObject *Connection_GetLTXID(udt_Connection*, void*);
static PyObject *Connection_GetHandle(udt_Connection*, void*);
static PyObject *Connection_GetCurrentSchema(udt_Connection*, void*);
static PyObject *Connection_GetEdition(udt_Connection*, void*);
static PyObject *Connection_GetExternalName(udt_Connection*, void*);
static PyObject *Connection_GetInternalName(udt_Connection*, void*);
static int Connection_SetStmtCacheSize(udt_Connection*, PyObject*, void*);
static int Connection_SetAction(udt_Connection*, PyObject*, void*);
static int Connection_SetClientIdentifier(udt_Connection*, PyObject*, void*);
static int Connection_SetClientInfo(udt_Connection*, PyObject*, void*);
static int Connection_SetCurrentSchema(udt_Connection*, PyObject*, void*);
static int Connection_SetDbOp(udt_Connection*, PyObject*, void*);
static int Connection_SetExternalName(udt_Connection*, PyObject*, void*);
static int Connection_SetInternalName(udt_Connection*, PyObject*, void*);
static int Connection_SetModule(udt_Connection*, PyObject*, void*);
//-----------------------------------------------------------------------------
// declaration of methods for Python type "Connection"
//-----------------------------------------------------------------------------
static PyMethodDef g_ConnectionMethods[] = {
{ "cursor", (PyCFunction) Connection_NewCursor,
METH_VARARGS | METH_KEYWORDS },
{ "commit", (PyCFunction) Connection_Commit, METH_NOARGS },
{ "rollback", (PyCFunction) Connection_Rollback, METH_NOARGS },
{ "begin", (PyCFunction) Connection_Begin, METH_VARARGS },
{ "prepare", (PyCFunction) Connection_Prepare, METH_NOARGS },
{ "close", (PyCFunction) Connection_Close, METH_NOARGS },
{ "cancel", (PyCFunction) Connection_Cancel, METH_NOARGS },
{ "__enter__", (PyCFunction) Connection_ContextManagerEnter, METH_NOARGS },
{ "__exit__", (PyCFunction) Connection_ContextManagerExit, METH_VARARGS },
{ "ping", (PyCFunction) Connection_Ping, METH_NOARGS },
{ "shutdown", (PyCFunction) Connection_Shutdown,
METH_VARARGS | METH_KEYWORDS},
{ "startup", (PyCFunction) Connection_Startup,
METH_VARARGS | METH_KEYWORDS},
{ "subscribe", (PyCFunction) Connection_Subscribe,
METH_VARARGS | METH_KEYWORDS},
{ "changepassword", (PyCFunction) Connection_ChangePassword,
METH_VARARGS },
{ "gettype", (PyCFunction) Connection_GetType, METH_VARARGS },
{ "deqoptions", (PyCFunction) Connection_NewDequeueOptions, METH_NOARGS },
{ "enqoptions", (PyCFunction) Connection_NewEnqueueOptions, METH_NOARGS },
{ "msgproperties", (PyCFunction) Connection_NewMessageProperties,
METH_NOARGS },
{ "deq", (PyCFunction) Connection_Dequeue, METH_VARARGS | METH_KEYWORDS },
{ "enq", (PyCFunction) Connection_Enqueue, METH_VARARGS | METH_KEYWORDS },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of members for Python type "Connection"
//-----------------------------------------------------------------------------
static PyMemberDef g_ConnectionMembers[] = {
{ "username", T_OBJECT, offsetof(udt_Connection, username), READONLY },
{ "dsn", T_OBJECT, offsetof(udt_Connection, dsn), READONLY },
{ "tnsentry", T_OBJECT, offsetof(udt_Connection, dsn), READONLY },
{ "autocommit", T_INT, offsetof(udt_Connection, autocommit), 0 },
{ "inputtypehandler", T_OBJECT,
offsetof(udt_Connection, inputTypeHandler), 0 },
{ "outputtypehandler", T_OBJECT,
offsetof(udt_Connection, outputTypeHandler), 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of calculated members for Python type "Connection"
//-----------------------------------------------------------------------------
static PyGetSetDef g_ConnectionCalcMembers[] = {
{ "version", (getter) Connection_GetVersion, 0, 0, 0 },
{ "encoding", (getter) Connection_GetEncoding, 0, 0, 0 },
{ "nencoding", (getter) Connection_GetNationalEncoding, 0, 0, 0 },
{ "maxBytesPerCharacter", (getter) Connection_GetMaxBytesPerCharacter,
0, 0, 0 },
{ "stmtcachesize", (getter) Connection_GetStmtCacheSize,
(setter) Connection_SetStmtCacheSize, 0, 0 },
{ "module", 0, (setter) Connection_SetModule, 0, 0 },
{ "action", 0, (setter) Connection_SetAction, 0, 0 },
{ "clientinfo", 0, (setter) Connection_SetClientInfo, 0, 0 },
{ "client_identifier", 0, (setter) Connection_SetClientIdentifier, 0, 0 },
{ "current_schema", (getter) Connection_GetCurrentSchema,
(setter) Connection_SetCurrentSchema, 0, 0 },
{ "external_name", (getter) Connection_GetExternalName,
(setter) Connection_SetExternalName, 0, 0 },
{ "internal_name", (getter) Connection_GetInternalName,
(setter) Connection_SetInternalName, 0, 0 },
{ "dbop", 0, (setter) Connection_SetDbOp, 0, 0 },
{ "edition", (getter) Connection_GetEdition, 0, 0, 0 },
{ "ltxid", (getter) Connection_GetLTXID, 0, 0, 0 },
{ "handle", (getter) Connection_GetHandle, 0, 0, 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of Python type "Connection"
//-----------------------------------------------------------------------------
static PyTypeObject g_ConnectionType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.Connection", // tp_name
sizeof(udt_Connection), // tp_basicsize
0, // tp_itemsize
(destructor) Connection_Free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
(reprfunc) Connection_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,
// tp_flags
0, // tp_doc
0, // tp_traverse
0, // tp_clear
0, // tp_richcompare
0, // tp_weaklistoffset
0, // tp_iter
0, // tp_iternext
g_ConnectionMethods, // tp_methods
g_ConnectionMembers, // tp_members
g_ConnectionCalcMembers, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
(initproc) Connection_Init, // tp_init
0, // tp_alloc
(newfunc) Connection_New, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
//-----------------------------------------------------------------------------
// structure used to help in establishing a connection
//-----------------------------------------------------------------------------
typedef struct {
udt_Buffer userNameBuffer;
udt_Buffer passwordBuffer;
udt_Buffer newPasswordBuffer;
udt_Buffer dsnBuffer;
udt_Buffer connectionClassBuffer;
udt_Buffer editionBuffer;
udt_Buffer tagBuffer;
uint32_t numAppContext;
dpiAppContext *appContext;
udt_Buffer *ctxNamespaceBuffers;
udt_Buffer *ctxNameBuffers;
udt_Buffer *ctxValueBuffers;
} udt_ConnectionParams;
//-----------------------------------------------------------------------------
// ConnectionParams_Initialize()
// Initialize the parameters to default values.
//-----------------------------------------------------------------------------
static void ConnectionParams_Initialize(udt_ConnectionParams *params)
{
cxBuffer_Init(¶ms->userNameBuffer);
cxBuffer_Init(¶ms->passwordBuffer);
cxBuffer_Init(¶ms->newPasswordBuffer);
cxBuffer_Init(¶ms->dsnBuffer);
cxBuffer_Init(¶ms->connectionClassBuffer);
cxBuffer_Init(¶ms->editionBuffer);
cxBuffer_Init(¶ms->tagBuffer);
params->numAppContext = 0;
params->appContext = NULL;
params->ctxNamespaceBuffers = NULL;
params->ctxNameBuffers = NULL;
params->ctxValueBuffers = NULL;
}
//-----------------------------------------------------------------------------
// ConnectionParams_ProcessContext()
// Process context for the connection parameters. This validates that the
// context passed in is a list of 3-tuples (namespace, name, value) and
// populates the parametrs with buffers for each of these.
//-----------------------------------------------------------------------------
static int ConnectionParams_ProcessContext(udt_ConnectionParams *params,
PyObject *context, const char *encoding)
{
uint32_t numEntries, i;
dpiAppContext *entry;
PyObject *entryObj;
size_t memorySize;
// validate context is a list with at least one entry in it
if (!context)
return 0;
if (!PyList_Check(context)) {
PyErr_SetString(PyExc_TypeError,
"appcontext should be a list of 3-tuples");
return -1;
}
numEntries = (uint32_t) PyList_GET_SIZE(context);
if (numEntries == 0)
return 0;
// allocate memory for the buffers used to communicate with DPI
params->appContext = PyMem_Malloc(numEntries * sizeof(dpiAppContext));
memorySize = numEntries * sizeof(udt_Buffer);
params->ctxNamespaceBuffers = PyMem_Malloc(memorySize);
params->ctxNameBuffers = PyMem_Malloc(memorySize);
params->ctxValueBuffers = PyMem_Malloc(memorySize);
if (!params->appContext || !params->ctxNamespaceBuffers ||
!params->ctxNameBuffers || !params->ctxValueBuffers) {
PyErr_NoMemory();
return -1;
}
// initialize buffers
for (i = 0; i < numEntries; i++) {
cxBuffer_Init(¶ms->ctxNamespaceBuffers[i]);
cxBuffer_Init(¶ms->ctxNameBuffers[i]);
cxBuffer_Init(¶ms->ctxValueBuffers[i]);
}
params->numAppContext = numEntries;
// process each entry
for (i = 0; i < numEntries; i++) {
entryObj = PyList_GET_ITEM(context, i);
if (!PyTuple_Check(entryObj) || PyTuple_GET_SIZE(entryObj) != 3) {
PyErr_SetString(PyExc_TypeError,
"appcontext should be a list of 3-tuples");
return -1;
}
if (cxBuffer_FromObject(¶ms->ctxNamespaceBuffers[i],
PyTuple_GET_ITEM(entryObj, 0), encoding) < 0)
return -1;
if (cxBuffer_FromObject(¶ms->ctxNameBuffers[i],
PyTuple_GET_ITEM(entryObj, 1), encoding) < 0)
return -1;
if (cxBuffer_FromObject(¶ms->ctxValueBuffers[i],
PyTuple_GET_ITEM(entryObj, 2), encoding) < 0)
return -1;
entry = ¶ms->appContext[i];
entry->namespaceName = params->ctxNamespaceBuffers[i].ptr;
entry->namespaceNameLength = params->ctxNamespaceBuffers[i].size;
entry->name = params->ctxNameBuffers[i].ptr;
entry->nameLength = params->ctxNameBuffers[i].size;
entry->value = params->ctxValueBuffers[i].ptr;
entry->valueLength = params->ctxValueBuffers[i].size;
}
return 0;
}
//-----------------------------------------------------------------------------
// ConnectionParams_Finalize()
// Finalize the parameters, freeing any resources that were allocated. The
// return value is a convenience to the caller.
//-----------------------------------------------------------------------------
static int ConnectionParams_Finalize(udt_ConnectionParams *params)
{
uint32_t i;
cxBuffer_Clear(¶ms->userNameBuffer);
cxBuffer_Clear(¶ms->passwordBuffer);
cxBuffer_Clear(¶ms->newPasswordBuffer);
cxBuffer_Clear(¶ms->dsnBuffer);
cxBuffer_Clear(¶ms->connectionClassBuffer);
cxBuffer_Clear(¶ms->editionBuffer);
cxBuffer_Clear(¶ms->tagBuffer);
for (i = 0; i < params->numAppContext; i++) {
cxBuffer_Clear(¶ms->ctxNamespaceBuffers[i]);
cxBuffer_Clear(¶ms->ctxNameBuffers[i]);
cxBuffer_Clear(¶ms->ctxValueBuffers[i]);
}
params->numAppContext = 0;
if (params->appContext) {
PyMem_Free(params->appContext);
params->appContext = NULL;
}
if (params->ctxNamespaceBuffers) {
PyMem_Free(params->ctxNamespaceBuffers);
params->ctxNamespaceBuffers = NULL;
}
if (params->ctxNameBuffers) {
PyMem_Free(params->ctxNameBuffers);
params->ctxNameBuffers = NULL;
}
if (params->ctxValueBuffers) {
PyMem_Free(params->ctxValueBuffers);
params->ctxValueBuffers = NULL;
}
return -1;
}
//-----------------------------------------------------------------------------
// Connection_IsConnected()
// Determines if the connection object is connected to the database. If not,
// a Python exception is raised.
//-----------------------------------------------------------------------------
static int Connection_IsConnected(udt_Connection *self)
{
if (!self->handle) {
PyErr_SetString(g_InterfaceErrorException, "not connected");
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// Connection_GetAttrText()
// Get the value of the attribute returned from the given function. The value
// is assumed to be a text value.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetAttrText(udt_Connection *self,
int (*func)(dpiConn *conn, const char **value, uint32_t *valueLength))
{
uint32_t valueLength;
const char *value;
if (Connection_IsConnected(self) < 0)
return NULL;
if ((*func)(self->handle, &value, &valueLength) < 0)
return Error_RaiseAndReturnNull();
if (!value)
Py_RETURN_NONE;
return cxString_FromEncodedString(value, valueLength,
self->encodingInfo.encoding);
}
//-----------------------------------------------------------------------------
// Connection_SetAttrText()
// Set the value of the attribute using the given function. The value is
// assumed to be a text value.
//-----------------------------------------------------------------------------
static int Connection_SetAttrText(udt_Connection *self, PyObject *value,
int (*func)(dpiConn *conn, const char *value, uint32_t valueLength))
{
udt_Buffer buffer;
int status;
if (Connection_IsConnected(self) < 0)
return -1;
if (cxBuffer_FromObject(&buffer, value, self->encodingInfo.encoding))
return -1;
status = (*func)(self->handle, buffer.ptr, buffer.size);
cxBuffer_Clear(&buffer);
if (status < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Connection_ChangePassword()
// Change the password for the given connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_ChangePassword(udt_Connection *self,
PyObject *args)
{
udt_Buffer usernameBuffer, oldPasswordBuffer, newPasswordBuffer;
PyObject *oldPasswordObj, *newPasswordObj;
int status;
// parse the arguments
if (!PyArg_ParseTuple(args, "OO", &oldPasswordObj, &newPasswordObj))
return NULL;
// populate buffers
cxBuffer_Init(&usernameBuffer);
cxBuffer_Init(&oldPasswordBuffer);
cxBuffer_Init(&newPasswordBuffer);
if (cxBuffer_FromObject(&usernameBuffer, self->username,
self->encodingInfo.encoding) < 0 ||
cxBuffer_FromObject(&oldPasswordBuffer, oldPasswordObj,
self->encodingInfo.encoding) < 0 ||
cxBuffer_FromObject(&newPasswordBuffer, newPasswordObj,
self->encodingInfo.encoding) < 0) {
cxBuffer_Clear(&usernameBuffer);
cxBuffer_Clear(&oldPasswordBuffer);
cxBuffer_Clear(&newPasswordBuffer);
return NULL;
}
// change the password
Py_BEGIN_ALLOW_THREADS
status = dpiConn_changePassword(self->handle, usernameBuffer.ptr,
usernameBuffer.size, oldPasswordBuffer.ptr, oldPasswordBuffer.size,
newPasswordBuffer.ptr, newPasswordBuffer.size);
Py_END_ALLOW_THREADS
cxBuffer_Clear(&usernameBuffer);
cxBuffer_Clear(&oldPasswordBuffer);
cxBuffer_Clear(&newPasswordBuffer);
if (status < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
#include "LOB.c"
#include "Cursor.c"
#include "Subscription.c"
#include "DeqOptions.c"
#include "EnqOptions.c"
#include "MsgProps.c"
//-----------------------------------------------------------------------------
// Connection_New()
// Create a new connection object and return it.
//-----------------------------------------------------------------------------
static PyObject* Connection_New(PyTypeObject *type, PyObject *args,
PyObject *keywordArgs)
{
udt_Connection *self;
// create the object
self = (udt_Connection*) type->tp_alloc(type, 0);
if (!self)
return NULL;
return (PyObject*) self;
}
//-----------------------------------------------------------------------------
// Connection_SplitComponent()
// Split the component out of the source and replace the source with the
// characters up to the split string and put the characters after the split
// string in to the target.
//-----------------------------------------------------------------------------
static int Connection_SplitComponent(PyObject **sourceObj,
PyObject **targetObj, const char *splitString)
{
PyObject *temp, *posObj;
Py_ssize_t size, pos;
if (!*sourceObj || *targetObj)
return 0;
posObj = PyObject_CallMethod(*sourceObj, "find", "s", splitString);
if (!posObj)
return -1;
pos = PyInt_AsLong(posObj);
Py_DECREF(posObj);
if (PyErr_Occurred())
return -1;
if (pos >= 0) {
size = PySequence_Size(*sourceObj);
if (PyErr_Occurred())
return -1;
*targetObj = PySequence_GetSlice(*sourceObj, pos + 1, size);
if (!*targetObj)
return -1;
temp = PySequence_GetSlice(*sourceObj, 0, pos);
if (!temp)
return -1;
*sourceObj = temp;
}
return 0;
}
//-----------------------------------------------------------------------------
// Connection_Init()
// Initialize the connection members.
//-----------------------------------------------------------------------------
static int Connection_Init(udt_Connection *self, PyObject *args,
PyObject *keywordArgs)
{
PyObject *tagObj, *matchAnyTagObj, *threadedObj, *eventsObj, *contextObj;
PyObject *usernameObj, *passwordObj, *dsnObj, *cclassObj, *editionObj;
dpiCommonCreateParams dpiCommonParams;
dpiConnCreateParams dpiCreateParams;
udt_ConnectionParams params;
PyObject *newPasswordObj;
udt_SessionPool *pool;
const char *encoding;
int status, temp;
// define keyword arguments
static char *keywordList[] = { "user", "password", "dsn", "mode",
"handle", "pool", "threaded", "events", "cclass", "purity",
"newpassword", "encoding", "nencoding", "edition", "appcontext",
"tag", "matchanytag", NULL };
// parse arguments
pool = NULL;
threadedObj = eventsObj = newPasswordObj = usernameObj = NULL;
passwordObj = dsnObj = cclassObj = editionObj = tagObj = NULL;
matchAnyTagObj = contextObj = NULL;
if (dpiContext_initCommonCreateParams(g_DpiContext, &dpiCommonParams) < 0)
return Error_RaiseAndReturnInt();
dpiCommonParams.driverName = DRIVER_NAME;
dpiCommonParams.driverNameLength =
(uint32_t) strlen(dpiCommonParams.driverName);
if (dpiContext_initConnCreateParams(g_DpiContext, &dpiCreateParams) < 0)
return Error_RaiseAndReturnInt();
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs,
"|OOOikO!OOOiOssOOOO", keywordList, &usernameObj, &passwordObj,
&dsnObj, &dpiCreateParams.authMode,
&dpiCreateParams.externalHandle, &g_SessionPoolType, &pool,
&threadedObj, &eventsObj, &cclassObj, &dpiCreateParams.purity,
&newPasswordObj, &dpiCommonParams.encoding,
&dpiCommonParams.nencoding, &editionObj, &contextObj, &tagObj,
&matchAnyTagObj))
return -1;
if (GetBooleanValue(threadedObj, 0, &temp) < 0)
return -1;
if (temp)
dpiCommonParams.createMode |= DPI_MODE_CREATE_THREADED;
if (GetBooleanValue(eventsObj, 0, &temp) < 0)
return -1;
if (temp)
dpiCommonParams.createMode |= DPI_MODE_CREATE_EVENTS;
if (GetBooleanValue(matchAnyTagObj, 0, &dpiCreateParams.matchAnyTag) < 0)
return -1;
// keep a copy of the user name and connect string (DSN)
Py_XINCREF(usernameObj);
self->username = usernameObj;
Py_XINCREF(dsnObj);
self->dsn = dsnObj;
// perform some parsing, if necessary
if (Connection_SplitComponent(&self->username, &passwordObj, "/") < 0)
return -1;
if (Connection_SplitComponent(&passwordObj, &self->dsn, "@") < 0)
return -1;
// setup parameters
if (pool) {
dpiCreateParams.pool = pool->handle;
encoding = pool->encodingInfo.encoding;
} else encoding = GetAdjustedEncoding(dpiCommonParams.encoding);
ConnectionParams_Initialize(¶ms);
if (ConnectionParams_ProcessContext(¶ms, contextObj, encoding) < 0)
return ConnectionParams_Finalize(¶ms);
if (cxBuffer_FromObject(¶ms.userNameBuffer, self->username,
encoding) < 0 ||
cxBuffer_FromObject(¶ms.passwordBuffer, passwordObj,
encoding) < 0 ||
cxBuffer_FromObject(¶ms.dsnBuffer, self->dsn, encoding) < 0 ||
cxBuffer_FromObject(¶ms.connectionClassBuffer, cclassObj,
encoding) < 0 ||
cxBuffer_FromObject(¶ms.newPasswordBuffer, newPasswordObj,
encoding) < 0 ||
cxBuffer_FromObject(¶ms.editionBuffer, editionObj,
encoding) < 0 ||
cxBuffer_FromObject(¶ms.tagBuffer, tagObj, encoding) < 0)
return ConnectionParams_Finalize(¶ms);
if (params.userNameBuffer.size == 0 && params.passwordBuffer.size == 0)
dpiCreateParams.externalAuth = 1;
dpiCreateParams.connectionClass = params.connectionClassBuffer.ptr;
dpiCreateParams.connectionClassLength = params.connectionClassBuffer.size;
dpiCreateParams.newPassword = params.newPasswordBuffer.ptr;
dpiCreateParams.newPasswordLength = params.newPasswordBuffer.size;
dpiCommonParams.edition = params.editionBuffer.ptr;
dpiCommonParams.editionLength = params.editionBuffer.size;
dpiCreateParams.tag = params.tagBuffer.ptr;
dpiCreateParams.tagLength = params.tagBuffer.size;
dpiCreateParams.appContext = params.appContext;
dpiCreateParams.numAppContext = params.numAppContext;
if (pool && !pool->homogeneous && pool->username && self->username) {
temp = PyObject_RichCompareBool(self->username, pool->username, Py_EQ);
if (temp < 0)
return ConnectionParams_Finalize(¶ms);
if (temp)
params.userNameBuffer.size = 0;
}
// create connection
Py_BEGIN_ALLOW_THREADS
status = dpiConn_create(g_DpiContext, params.userNameBuffer.ptr,
params.userNameBuffer.size, params.passwordBuffer.ptr,
params.passwordBuffer.size, params.dsnBuffer.ptr,
params.dsnBuffer.size, &dpiCommonParams, &dpiCreateParams,
&self->handle);
Py_END_ALLOW_THREADS
ConnectionParams_Finalize(¶ms);
if (status < 0)
return Error_RaiseAndReturnInt();
// determine encodings to use
if (pool)
self->encodingInfo = pool->encodingInfo;
else {
if (dpiConn_getEncodingInfo(self->handle, &self->encodingInfo) < 0)
return Error_RaiseAndReturnInt();
self->encodingInfo.encoding =
GetAdjustedEncoding(self->encodingInfo.encoding);
self->encodingInfo.nencoding =
GetAdjustedEncoding(self->encodingInfo.nencoding);
}
return 0;
}
//-----------------------------------------------------------------------------
// Connection_Free()
// Deallocate the connection, disconnecting from the database if necessary.
//-----------------------------------------------------------------------------
static void Connection_Free(udt_Connection *self)
{
if (self->handle) {
Py_BEGIN_ALLOW_THREADS
dpiConn_release(self->handle);
Py_END_ALLOW_THREADS
self->handle = NULL;
}
Py_CLEAR(self->sessionPool);
Py_CLEAR(self->username);
Py_CLEAR(self->dsn);
Py_CLEAR(self->version);
Py_CLEAR(self->inputTypeHandler);
Py_CLEAR(self->outputTypeHandler);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// Connection_Repr()
// Return a string representation of the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_Repr(udt_Connection *connection)
{
PyObject *module, *name, *result, *format, *formatArgs = NULL;
if (GetModuleAndName(Py_TYPE(connection), &module, &name) < 0)
return NULL;
if (connection->username && connection->username != Py_None &&
connection->dsn && connection->dsn != Py_None) {
format = cxString_FromAscii("<%s.%s to %s@%s>");
if (format)
formatArgs = PyTuple_Pack(4, module, name, connection->username,
connection->dsn);
} else if (connection->username && connection->username != Py_None) {
format = cxString_FromAscii("<%s.%s to user %s@local>");
if (format)
formatArgs = PyTuple_Pack(3, module, name, connection->username);
} else {
format = cxString_FromAscii("<%s.%s to externally identified user>");
if (format)
formatArgs = PyTuple_Pack(2, module, name);
}
Py_DECREF(module);
Py_DECREF(name);
if (!format)
return NULL;
if (!formatArgs) {
Py_DECREF(format);
return NULL;
}
result = cxString_Format(format, formatArgs);
Py_DECREF(format);
Py_DECREF(formatArgs);
return result;
}
//-----------------------------------------------------------------------------
// Connection_GetStmtCacheSize()
// Return the Oracle statement cache size.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetStmtCacheSize(udt_Connection* self, void* arg)
{
uint32_t cacheSize;
if (Connection_IsConnected(self) < 0)
return NULL;
if (dpiConn_getStmtCacheSize(self->handle, &cacheSize) < 0)
return Error_RaiseAndReturnNull();
return PyInt_FromLong(cacheSize);
}
//-----------------------------------------------------------------------------
// Connection_SetStmtCacheSize()
// Set the Oracle statement cache size.
//-----------------------------------------------------------------------------
static int Connection_SetStmtCacheSize(udt_Connection* self, PyObject *value,
void* arg)
{
uint32_t cacheSize;
if (Connection_IsConnected(self) < 0)
return -1;
if (!PyInt_Check(value)) {
PyErr_SetString(PyExc_TypeError, "value must be an integer");
return -1;
}
cacheSize = (uint32_t) PyInt_AsLong(value);
if (dpiConn_setStmtCacheSize(self->handle, cacheSize) < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Connection_GetType()
// Return a type object given its name.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetType(udt_Connection *self, PyObject *args)
{
PyObject *nameObj = NULL;
// parse the arguments
if (!PyArg_ParseTuple(args, "O", &nameObj))
return NULL;
return (PyObject*) ObjectType_NewByName(self, nameObj);
}
//-----------------------------------------------------------------------------
// Connection_GetVersion()
// Retrieve the version of the database and return it. Note that this
// function also places the result in the associated dictionary so it is only
// calculated once.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetVersion(udt_Connection *self, void *unused)
{
uint32_t releaseStringLength;
dpiVersionInfo versionInfo;
const char *releaseString;
char buffer[25];
if (dpiConn_getServerVersion(self->handle, &releaseString,
&releaseStringLength, &versionInfo) < 0)
return Error_RaiseAndReturnNull();
snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d.%d", versionInfo.versionNum,
versionInfo.releaseNum, versionInfo.updateNum,
versionInfo.portReleaseNum, versionInfo.portUpdateNum);
return cxString_FromAscii(buffer);
}
//-----------------------------------------------------------------------------
// Connection_GetEncoding()
// Return the encoding associated with the environment of the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetEncoding(udt_Connection *self, void *unused)
{
return cxString_FromAscii(self->encodingInfo.encoding);
}
//-----------------------------------------------------------------------------
// Connection_GetLTXID()
// Return the logical transaction id used with Transaction Guard.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetLTXID(udt_Connection *self, void *unused)
{
uint32_t ltxidLength;
const char *ltxid;
if (Connection_IsConnected(self) < 0)
return NULL;
if (dpiConn_getLTXID(self->handle, <xid, <xidLength) < 0)
return Error_RaiseAndReturnNull();
return PyBytes_FromStringAndSize(ltxid, ltxidLength);
}
//-----------------------------------------------------------------------------
// Connection_GetHandle()
// Return the OCI handle used by the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetHandle(udt_Connection *self, void *unused)
{
void *handle;
if (Connection_IsConnected(self) < 0)
return NULL;
if (dpiConn_getHandle(self->handle, &handle) < 0)
return Error_RaiseAndReturnNull();
return PyInt_FromLong((long) handle);
}
//-----------------------------------------------------------------------------
// Connection_GetNationalEncoding()
// Return the national encoding associated with the environment of the
// connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetNationalEncoding(udt_Connection *self,
void *unused)
{
return cxString_FromAscii(self->encodingInfo.nencoding);
}
//-----------------------------------------------------------------------------
// Connection_GetMaxBytesPerCharacter()
// Return the maximum number of bytes per character.
//-----------------------------------------------------------------------------
static PyObject *Connection_GetMaxBytesPerCharacter(udt_Connection *self,
void *unused)
{
return PyInt_FromLong(self->encodingInfo.maxBytesPerCharacter);
}
//-----------------------------------------------------------------------------
// Connection_Close()
// Close the connection, disconnecting from the database.
//-----------------------------------------------------------------------------
static PyObject *Connection_Close(udt_Connection *self, PyObject *args)
{
int status;
if (Connection_IsConnected(self) < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_close(self->handle, DPI_MODE_CONN_CLOSE_DEFAULT, NULL, 0);
Py_END_ALLOW_THREADS
if (status < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Connection_Commit()
// Commit the transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_Commit(udt_Connection *self, PyObject *args)
{
int status;
if (Connection_IsConnected(self) < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_commit(self->handle);
Py_END_ALLOW_THREADS
if (status < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Connection_Begin()
// Begin a new transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_Begin(udt_Connection *self, PyObject *args)
{
uint32_t transactionIdLength, branchIdLength;
const char *transactionId, *branchId;
int formatId, status;
// parse the arguments
formatId = -1;
transactionId = branchId = NULL;
transactionIdLength = branchIdLength = 0;
if (!PyArg_ParseTuple(args, "|is#s#", &formatId, &transactionId,
&transactionIdLength, &branchId, &branchIdLength))
return NULL;
// make sure we are actually connected
if (Connection_IsConnected(self) < 0)
return NULL;
// begin the distributed transaction
Py_BEGIN_ALLOW_THREADS
status = dpiConn_beginDistribTrans(self->handle, formatId, transactionId,
transactionIdLength, branchId, branchIdLength);
Py_END_ALLOW_THREADS
if (status < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Connection_Prepare()
// Commit the transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_Prepare(udt_Connection *self, PyObject *args)
{
int status, commitNeeded;
// make sure we are actually connected
if (Connection_IsConnected(self) < 0)
return NULL;
// perform the prepare
Py_BEGIN_ALLOW_THREADS
status = dpiConn_prepareDistribTrans(self->handle, &commitNeeded);
Py_END_ALLOW_THREADS
if (status < 0)
return Error_RaiseAndReturnNull();
// return whether a commit is needed in order to allow for avoiding the
// call to commit() which will fail with ORA-24756 (transaction does not
// exist)
return PyBool_FromLong(commitNeeded);
}
//-----------------------------------------------------------------------------
// Connection_Rollback()
// Rollback the transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *Connection_Rollback(udt_Connection *self, PyObject *args)
{
int status;
if (Connection_IsConnected(self) < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_rollback(self->handle);
Py_END_ALLOW_THREADS
if (status < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Connection_NewCursor()
// Create a new cursor (statement) referencing the connection.
You can’t perform that action at this time.