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//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2020, 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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// cxoConnection.c
// Definition of the Python type Connection.
//-----------------------------------------------------------------------------
#include "cxoModule.h"
//-----------------------------------------------------------------------------
// structure used to help in establishing a connection
//-----------------------------------------------------------------------------
typedef struct {
const char *encoding;
const char *nencoding;
cxoBuffer userNameBuffer;
cxoBuffer passwordBuffer;
cxoBuffer newPasswordBuffer;
cxoBuffer dsnBuffer;
cxoBuffer connectionClassBuffer;
cxoBuffer editionBuffer;
cxoBuffer tagBuffer;
uint32_t numAppContext;
dpiAppContext *appContext;
cxoBuffer *ctxNamespaceBuffers;
cxoBuffer *ctxNameBuffers;
cxoBuffer *ctxValueBuffers;
dpiShardingKeyColumn *shardingKeyColumns;
cxoBuffer *shardingKeyBuffers;
uint32_t numShardingKeyColumns;
dpiShardingKeyColumn *superShardingKeyColumns;
uint32_t numSuperShardingKeyColumns;
cxoBuffer *superShardingKeyBuffers;
} cxoConnectionParams;
//-----------------------------------------------------------------------------
// cxoConnectionParams_initialize()
// Initialize the parameters to default values.
//-----------------------------------------------------------------------------
static void cxoConnectionParams_initialize(cxoConnectionParams *params)
{
cxoBuffer_init(¶ms->userNameBuffer);
cxoBuffer_init(¶ms->passwordBuffer);
cxoBuffer_init(¶ms->newPasswordBuffer);
cxoBuffer_init(¶ms->dsnBuffer);
cxoBuffer_init(¶ms->connectionClassBuffer);
cxoBuffer_init(¶ms->editionBuffer);
cxoBuffer_init(¶ms->tagBuffer);
params->numAppContext = 0;
params->appContext = NULL;
params->ctxNamespaceBuffers = NULL;
params->ctxNameBuffers = NULL;
params->ctxValueBuffers = NULL;
params->numShardingKeyColumns = 0;
params->shardingKeyColumns = NULL;
params->shardingKeyBuffers = NULL;
params->numSuperShardingKeyColumns = 0;
params->superShardingKeyColumns = NULL;
params->superShardingKeyBuffers = NULL;
}
//-----------------------------------------------------------------------------
// cxoConnectionParams_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 cxoConnectionParams_processContext(cxoConnectionParams *params,
PyObject *context)
{
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(cxoBuffer);
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++) {
cxoBuffer_init(¶ms->ctxNamespaceBuffers[i]);
cxoBuffer_init(¶ms->ctxNameBuffers[i]);
cxoBuffer_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 (cxoBuffer_fromObject(¶ms->ctxNamespaceBuffers[i],
PyTuple_GET_ITEM(entryObj, 0), params->encoding) < 0)
return -1;
if (cxoBuffer_fromObject(¶ms->ctxNameBuffers[i],
PyTuple_GET_ITEM(entryObj, 1), params->encoding) < 0)
return -1;
if (cxoBuffer_fromObject(¶ms->ctxValueBuffers[i],
PyTuple_GET_ITEM(entryObj, 2), params->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;
}
//-----------------------------------------------------------------------------
// cxoConnectionParams_processShardingKeyValue()
// Process a single sharding key value.
//-----------------------------------------------------------------------------
static int cxoConnectionParams_processShardingKeyValue(
cxoConnectionParams *params, PyObject *value,
dpiShardingKeyColumn *column, cxoBuffer *buffer)
{
dpiNativeTypeNum nativeTypeNum;
cxoTransformNum transformNum;
transformNum = cxoTransform_getNumFromPythonValue(value, 0);
if (cxoTransform_fromPython(transformNum, &nativeTypeNum, value,
&column->value, buffer, params->encoding, params->nencoding, NULL,
0) < 0)
return -1;
cxoTransform_getTypeInfo(transformNum, &column->oracleTypeNum,
&column->nativeTypeNum);
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnectionParams_processShardingKey()
// Process either the sharding key or the super sharding key. A sharding key
// is expected to be a sequence of values. A null value or a sequence of size
// 0 is ignored.
//-----------------------------------------------------------------------------
static int cxoConnectionParams_processShardingKey(cxoConnectionParams *params,
PyObject *shardingKeyObj, int isSuperShardingKey)
{
dpiShardingKeyColumn *columns;
uint32_t i, numColumns;
cxoBuffer *buffers;
PyObject *value;
// validate sharding key
if (!shardingKeyObj || shardingKeyObj == Py_None)
return 0;
if (!PySequence_Check(shardingKeyObj)) {
PyErr_SetString(PyExc_TypeError, "expecting a sequence");
return -1;
}
numColumns = (uint32_t) PySequence_Size(shardingKeyObj);
if (numColumns == 0)
return 0;
// allocate memory for the sharding key values
columns = PyMem_Calloc(numColumns, sizeof(dpiShardingKeyColumn));
buffers = PyMem_Calloc(numColumns, sizeof(cxoBuffer));
if (!columns || !buffers) {
PyErr_NoMemory();
return -1;
}
if (isSuperShardingKey) {
params->superShardingKeyColumns = columns;
params->superShardingKeyBuffers = buffers;
params->numSuperShardingKeyColumns = numColumns;
} else {
params->shardingKeyColumns = columns;
params->shardingKeyBuffers = buffers;
params->numShardingKeyColumns = numColumns;
}
// process each value
for (i = 0; i < numColumns; i++) {
value = PySequence_GetItem(shardingKeyObj, i);
if (!value)
return -1;
if (cxoConnectionParams_processShardingKeyValue(params, value,
&columns[i], &buffers[i]) < 0)
return -1;
Py_DECREF(value);
}
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnectionParams_finalize()
// Finalize the parameters, freeing any resources that were allocated. The
// return value is a convenience to the caller.
//-----------------------------------------------------------------------------
static int cxoConnectionParams_finalize(cxoConnectionParams *params)
{
uint32_t i;
cxoBuffer_clear(¶ms->userNameBuffer);
cxoBuffer_clear(¶ms->passwordBuffer);
cxoBuffer_clear(¶ms->newPasswordBuffer);
cxoBuffer_clear(¶ms->dsnBuffer);
cxoBuffer_clear(¶ms->connectionClassBuffer);
cxoBuffer_clear(¶ms->editionBuffer);
cxoBuffer_clear(¶ms->tagBuffer);
for (i = 0; i < params->numAppContext; i++) {
cxoBuffer_clear(¶ms->ctxNamespaceBuffers[i]);
cxoBuffer_clear(¶ms->ctxNameBuffers[i]);
cxoBuffer_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;
}
for (i = 0; i < params->numShardingKeyColumns; i++)
cxoBuffer_clear(¶ms->shardingKeyBuffers[i]);
if (params->shardingKeyColumns) {
PyMem_Free(params->shardingKeyColumns);
params->shardingKeyColumns = NULL;
}
if (params->shardingKeyBuffers) {
PyMem_Free(params->shardingKeyBuffers);
params->shardingKeyBuffers = NULL;
}
for (i = 0; i < params->numSuperShardingKeyColumns; i++)
cxoBuffer_clear(¶ms->superShardingKeyBuffers[i]);
if (params->superShardingKeyColumns) {
PyMem_Free(params->superShardingKeyColumns);
params->superShardingKeyColumns = NULL;
}
if (params->superShardingKeyBuffers) {
PyMem_Free(params->superShardingKeyBuffers);
params->superShardingKeyBuffers = NULL;
}
return -1;
}
//-----------------------------------------------------------------------------
// cxoConnection_getSodaFlags()
// Get the flags to use for SODA. This checks the autocommit flag and enables
// atomic commit if set to a true value. It also checks to ensure that the
// connection is valid.
//-----------------------------------------------------------------------------
int cxoConnection_getSodaFlags(cxoConnection *conn, uint32_t *flags)
{
if (cxoConnection_isConnected(conn) < 0)
return -1;
*flags = (conn->autocommit) ? DPI_SODA_FLAGS_ATOMIC_COMMIT :
DPI_SODA_FLAGS_DEFAULT;
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_isConnected()
// Determines if the connection object is connected to the database. If not,
// a Python exception is raised.
//-----------------------------------------------------------------------------
int cxoConnection_isConnected(cxoConnection *conn)
{
if (!conn->handle) {
cxoError_raiseFromString(cxoInterfaceErrorException, "not connected");
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_getAttrText()
// Get the value of the attribute returned from the given function. The value
// is assumed to be a text value.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getAttrText(cxoConnection *conn,
int (*func)(dpiConn *conn, const char **value, uint32_t *valueLength))
{
uint32_t valueLength;
const char *value;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if ((*func)(conn->handle, &value, &valueLength) < 0)
return cxoError_raiseAndReturnNull();
if (!value)
Py_RETURN_NONE;
return PyUnicode_Decode(value, valueLength, conn->encodingInfo.encoding,
NULL);
}
//-----------------------------------------------------------------------------
// cxoConnection_setAttrText()
// Set the value of the attribute using the given function. The value is
// assumed to be a text value.
//-----------------------------------------------------------------------------
static int cxoConnection_setAttrText(cxoConnection *conn, PyObject *value,
int (*func)(dpiConn *conn, const char *value, uint32_t valueLength))
{
cxoBuffer buffer;
int status;
if (cxoConnection_isConnected(conn) < 0)
return -1;
if (cxoBuffer_fromObject(&buffer, value, conn->encodingInfo.encoding))
return -1;
status = (*func)(conn->handle, buffer.ptr, buffer.size);
cxoBuffer_clear(&buffer);
if (status < 0)
return cxoError_raiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_changePassword()
// Change the password for the given connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_changePassword(cxoConnection *conn,
PyObject *args)
{
cxoBuffer usernameBuffer, oldPasswordBuffer, newPasswordBuffer;
PyObject *oldPasswordObj, *newPasswordObj;
int status;
// parse the arguments
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (!PyArg_ParseTuple(args, "OO", &oldPasswordObj, &newPasswordObj))
return NULL;
// populate buffers
cxoBuffer_init(&usernameBuffer);
cxoBuffer_init(&oldPasswordBuffer);
cxoBuffer_init(&newPasswordBuffer);
if (cxoBuffer_fromObject(&usernameBuffer, conn->username,
conn->encodingInfo.encoding) < 0 ||
cxoBuffer_fromObject(&oldPasswordBuffer, oldPasswordObj,
conn->encodingInfo.encoding) < 0 ||
cxoBuffer_fromObject(&newPasswordBuffer, newPasswordObj,
conn->encodingInfo.encoding) < 0) {
cxoBuffer_clear(&usernameBuffer);
cxoBuffer_clear(&oldPasswordBuffer);
cxoBuffer_clear(&newPasswordBuffer);
return NULL;
}
// change the password
Py_BEGIN_ALLOW_THREADS
status = dpiConn_changePassword(conn->handle, usernameBuffer.ptr,
usernameBuffer.size, oldPasswordBuffer.ptr, oldPasswordBuffer.size,
newPasswordBuffer.ptr, newPasswordBuffer.size);
Py_END_ALLOW_THREADS
cxoBuffer_clear(&usernameBuffer);
cxoBuffer_clear(&oldPasswordBuffer);
cxoBuffer_clear(&newPasswordBuffer);
if (status < 0)
return cxoError_raiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// cxoConnection_new()
// Create a new connection object and return it.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_new(PyTypeObject *type, PyObject *args,
PyObject *keywordArgs)
{
return type->tp_alloc(type, 0);
}
//-----------------------------------------------------------------------------
// cxoConnection_splitComponent()
// Split the component out of the source if the split string is found and
// return the "before" and "after" parts.
//-----------------------------------------------------------------------------
static int cxoConnection_splitComponent(PyObject *sourceObj,
const char *splitString, const char *methodName,
PyObject **beforePartObj, PyObject **afterPartObj)
{
Py_ssize_t size, pos;
PyObject *posObj;
posObj = PyObject_CallMethod(sourceObj, methodName, "s", splitString);
if (!posObj)
return -1;
pos = PyLong_AsLong(posObj);
Py_DECREF(posObj);
if (PyErr_Occurred())
return -1;
if (pos < 0) {
*beforePartObj = *afterPartObj = NULL;
} else {
size = PySequence_Size(sourceObj);
if (PyErr_Occurred())
return -1;
*afterPartObj = PySequence_GetSlice(sourceObj, pos + 1, size);
if (!*afterPartObj)
return -1;
*beforePartObj = PySequence_GetSlice(sourceObj, 0, pos);
if (!*beforePartObj) {
Py_DECREF(*afterPartObj);
*afterPartObj = NULL;
return -1;
}
}
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_init()
// Initialize the connection members.
//-----------------------------------------------------------------------------
static int cxoConnection_init(cxoConnection *conn, PyObject *args,
PyObject *keywordArgs)
{
PyObject *usernameObj, *passwordObj, *dsnObj, *cclassObj, *editionObj;
int status, temp, invokeSessionCallback, threaded, events;
PyObject *shardingKeyObj, *superShardingKeyObj, *tempObj;
PyObject *beforePartObj, *afterPartObj;
dpiCommonCreateParams dpiCommonParams;
dpiConnCreateParams dpiCreateParams;
unsigned long long externalHandle;
PyObject *tagObj, *contextObj;
unsigned int stmtCacheSize;
cxoConnectionParams params;
PyObject *newPasswordObj;
cxoSessionPool *pool;
// define keyword arguments
static char *keywordList[] = { "user", "password", "dsn", "mode",
"handle", "pool", "threaded", "events", "cclass", "purity",
"newpassword", "encoding", "nencoding", "edition", "appcontext",
"tag", "matchanytag", "shardingkey", "supershardingkey",
"stmtcachesize", NULL };
// parse arguments
pool = NULL;
tagObj = Py_None;
threaded = 0;
externalHandle = 0;
newPasswordObj = usernameObj = NULL;
passwordObj = dsnObj = cclassObj = editionObj = NULL;
contextObj = shardingKeyObj = superShardingKeyObj = NULL;
stmtCacheSize = DPI_DEFAULT_STMT_CACHE_SIZE;
if (cxoUtils_initializeDPI(NULL) < 0)
return -1;
if (dpiContext_initCommonCreateParams(cxoDpiContext, &dpiCommonParams) < 0)
return cxoError_raiseAndReturnInt();
if (dpiContext_initConnCreateParams(cxoDpiContext, &dpiCreateParams) < 0)
return cxoError_raiseAndReturnInt();
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs,
"|OOOiKO!ppOiOssOOOpOOI", keywordList, &usernameObj, &passwordObj,
&dsnObj, &dpiCreateParams.authMode, &externalHandle,
&cxoPyTypeSessionPool, &pool, &threaded, &events, &cclassObj,
&dpiCreateParams.purity, &newPasswordObj,
&dpiCommonParams.encoding, &dpiCommonParams.nencoding, &editionObj,
&contextObj, &tagObj, &dpiCreateParams.matchAnyTag,
&shardingKeyObj, &superShardingKeyObj, &stmtCacheSize))
return -1;
dpiCreateParams.externalHandle = (void*) externalHandle;
if (threaded)
dpiCommonParams.createMode |= DPI_MODE_CREATE_THREADED;
if (events)
dpiCommonParams.createMode |= DPI_MODE_CREATE_EVENTS;
// keep a copy of the user name and connect string (DSN)
Py_XINCREF(usernameObj);
conn->username = usernameObj;
Py_XINCREF(dsnObj);
conn->dsn = dsnObj;
Py_XINCREF(passwordObj);
// perform some parsing, if no password and DSN are provided but the user
// name is provided
if (conn->username && !passwordObj && !dsnObj) {
if (cxoConnection_splitComponent(conn->username, "/", "find",
&beforePartObj, &afterPartObj) < 0)
return -1;
if (beforePartObj) {
Py_DECREF(conn->username);
conn->username = beforePartObj;
passwordObj = afterPartObj;
if (cxoConnection_splitComponent(passwordObj, "@", "rfind",
&beforePartObj, &afterPartObj) < 0)
return -1;
if (beforePartObj) {
Py_DECREF(passwordObj);
passwordObj = beforePartObj;
conn->dsn = afterPartObj;
}
}
}
// setup parameters
cxoConnectionParams_initialize(¶ms);
if (pool) {
dpiCreateParams.pool = pool->handle;
params.encoding = pool->encodingInfo.encoding;
params.nencoding = pool->encodingInfo.nencoding;
} else {
params.encoding =
cxoUtils_getAdjustedEncoding(dpiCommonParams.encoding);
params.nencoding =
cxoUtils_getAdjustedEncoding(dpiCommonParams.nencoding);
}
if (cxoConnectionParams_processContext(¶ms, contextObj) < 0)
return cxoConnectionParams_finalize(¶ms);
if (cxoConnectionParams_processShardingKey(¶ms, shardingKeyObj, 0) < 0)
return cxoConnectionParams_finalize(¶ms);
if (cxoConnectionParams_processShardingKey(¶ms, superShardingKeyObj,
1) < 0)
return cxoConnectionParams_finalize(¶ms);
if (cxoBuffer_fromObject(¶ms.userNameBuffer, conn->username,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.passwordBuffer, passwordObj,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.dsnBuffer, conn->dsn,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.connectionClassBuffer, cclassObj,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.newPasswordBuffer, newPasswordObj,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.editionBuffer, editionObj,
params.encoding) < 0 ||
cxoBuffer_fromObject(¶ms.tagBuffer, tagObj,
params.encoding) < 0) {
Py_XDECREF(passwordObj);
return cxoConnectionParams_finalize(¶ms);
}
Py_XDECREF(passwordObj);
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;
dpiCommonParams.stmtCacheSize = stmtCacheSize;
dpiCreateParams.tag = params.tagBuffer.ptr;
dpiCreateParams.tagLength = params.tagBuffer.size;
dpiCreateParams.appContext = params.appContext;
dpiCreateParams.numAppContext = params.numAppContext;
dpiCreateParams.shardingKeyColumns = params.shardingKeyColumns;
dpiCreateParams.numShardingKeyColumns = params.numShardingKeyColumns;
dpiCreateParams.superShardingKeyColumns = params.superShardingKeyColumns;
dpiCreateParams.numSuperShardingKeyColumns =
params.numSuperShardingKeyColumns;
if (pool && !pool->homogeneous && pool->username && conn->username) {
temp = PyObject_RichCompareBool(conn->username, pool->username, Py_EQ);
if (temp < 0)
return cxoConnectionParams_finalize(¶ms);
if (temp)
params.userNameBuffer.size = 0;
}
// create connection
Py_BEGIN_ALLOW_THREADS
status = dpiConn_create(cxoDpiContext, params.userNameBuffer.ptr,
params.userNameBuffer.size, params.passwordBuffer.ptr,
params.passwordBuffer.size, params.dsnBuffer.ptr,
params.dsnBuffer.size, &dpiCommonParams, &dpiCreateParams,
&conn->handle);
Py_END_ALLOW_THREADS
if (status < 0) {
cxoConnectionParams_finalize(¶ms);
return cxoError_raiseAndReturnInt();
}
// determine if session callback should be invoked; this takes place if
// the connection is newly created by the pool or if the requested tag
// does not match the actual tag
invokeSessionCallback = 0;
if (dpiCreateParams.outNewSession ||
dpiCreateParams.outTagLength != params.tagBuffer.size ||
(dpiCreateParams.outTagLength > 0 &&
strncmp(dpiCreateParams.outTag, params.tagBuffer.ptr,
dpiCreateParams.outTagLength) != 0))
invokeSessionCallback = 1;
cxoConnectionParams_finalize(¶ms);
// determine encodings to use
if (pool)
conn->encodingInfo = pool->encodingInfo;
else {
if (dpiConn_getEncodingInfo(conn->handle, &conn->encodingInfo) < 0)
return cxoError_raiseAndReturnInt();
conn->encodingInfo.encoding =
cxoUtils_getAdjustedEncoding(conn->encodingInfo.encoding);
conn->encodingInfo.nencoding =
cxoUtils_getAdjustedEncoding(conn->encodingInfo.nencoding);
}
// set tag property
if (dpiCreateParams.outTagLength > 0) {
conn->tag = PyUnicode_Decode(dpiCreateParams.outTag,
dpiCreateParams.outTagLength, conn->encodingInfo.encoding,
NULL);
if (!conn->tag)
return -1;
}
// invoke the session callback if applicable
if (invokeSessionCallback && pool && pool->sessionCallback &&
PyCallable_Check(pool->sessionCallback)) {
tempObj = PyObject_CallFunctionObjArgs(pool->sessionCallback,
(PyObject*) conn, tagObj, NULL);
if (!tempObj)
return -1;
Py_DECREF(tempObj);
}
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_free()
// Deallocate the connection, disconnecting from the database if necessary.
//-----------------------------------------------------------------------------
static void cxoConnection_free(cxoConnection *conn)
{
if (conn->handle) {
Py_BEGIN_ALLOW_THREADS
dpiConn_release(conn->handle);
Py_END_ALLOW_THREADS
conn->handle = NULL;
}
Py_CLEAR(conn->sessionPool);
Py_CLEAR(conn->username);
Py_CLEAR(conn->dsn);
Py_CLEAR(conn->version);
Py_CLEAR(conn->inputTypeHandler);
Py_CLEAR(conn->outputTypeHandler);
Py_CLEAR(conn->tag);
Py_TYPE(conn)->tp_free((PyObject*) conn);
}
//-----------------------------------------------------------------------------
// cxoConnection_repr()
// Return a string representation of the connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_repr(cxoConnection *connection)
{
PyObject *module, *name, *result;
if (cxoUtils_getModuleAndName(Py_TYPE(connection), &module, &name) < 0)
return NULL;
if (connection->username && connection->username != Py_None &&
connection->dsn && connection->dsn != Py_None) {
result = cxoUtils_formatString("<%s.%s to %s@%s>",
PyTuple_Pack(4, module, name, connection->username,
connection->dsn));
} else if (connection->username && connection->username != Py_None) {
result = cxoUtils_formatString("<%s.%s to user %s@local>",
PyTuple_Pack(3, module, name, connection->username));
} else {
result = cxoUtils_formatString("<%s.%s to externally identified user>",
PyTuple_Pack(2, module, name));
}
Py_DECREF(module);
Py_DECREF(name);
return result;
}
//-----------------------------------------------------------------------------
// cxoConnection_getStmtCacheSize()
// Return the Oracle statement cache size.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getStmtCacheSize(cxoConnection* conn, void* arg)
{
uint32_t cacheSize;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (dpiConn_getStmtCacheSize(conn->handle, &cacheSize) < 0)
return cxoError_raiseAndReturnNull();
return PyLong_FromLong(cacheSize);
}
//-----------------------------------------------------------------------------
// cxoConnection_setStmtCacheSize()
// Set the Oracle statement cache size.
//-----------------------------------------------------------------------------
static int cxoConnection_setStmtCacheSize(cxoConnection* conn, PyObject *value,
void* arg)
{
uint32_t cacheSize;
if (cxoConnection_isConnected(conn) < 0)
return -1;
if (!PyLong_Check(value)) {
PyErr_SetString(PyExc_TypeError, "value must be an integer");
return -1;
}
cacheSize = (uint32_t) PyLong_AsLong(value);
if (dpiConn_setStmtCacheSize(conn->handle, cacheSize) < 0)
return cxoError_raiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_getCallTimeout()
// Return the call timeout (in milliseconds) for round-trips performed with
// this connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getCallTimeout(cxoConnection* conn, void* arg)
{
uint32_t callTimeout;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (dpiConn_getCallTimeout(conn->handle, &callTimeout) < 0)
return cxoError_raiseAndReturnNull();
return PyLong_FromLong(callTimeout);
}
//-----------------------------------------------------------------------------
// cxoConnection_setCallTimeout()
// Set the call timeout (in milliseconds) for round-trips performed with this
// connection.
//-----------------------------------------------------------------------------
static int cxoConnection_setCallTimeout(cxoConnection* conn, PyObject *value,
void* arg)
{
uint32_t callTimeout;
if (cxoConnection_isConnected(conn) < 0)
return -1;
callTimeout = (uint32_t) PyLong_AsLong(value);
if (PyErr_Occurred())
return -1;
if (dpiConn_setCallTimeout(conn->handle, callTimeout) < 0)
return cxoError_raiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// cxoConnection_getType()
// Return a type object given its name.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getType(cxoConnection *conn, PyObject *nameObj)
{
if (cxoConnection_isConnected(conn) < 0)
return NULL;
return (PyObject*) cxoObjectType_newByName(conn, nameObj);
}
//-----------------------------------------------------------------------------
// cxoConnection_createLob()
// Create a new temporary LOB and return it.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_createLob(cxoConnection *conn,
PyObject *lobType)
{
cxoDbType *dbType;
dpiLob *handle;
PyObject *lob;
// verify connection is open
if (cxoConnection_isConnected(conn) < 0)
return NULL;
// verify the LOB type
if (lobType != (PyObject*) cxoDbTypeClob &&
lobType != (PyObject*) cxoDbTypeBlob &&
lobType != (PyObject*) cxoDbTypeNclob) {
PyErr_SetString(PyExc_TypeError,
"parameter should be one of cx_Oracle.DB_TYPE_CLOB, "
"cx_Oracle.DB_TYPE_BLOB or cx_Oracle.DB_TYPE_NCLOB");
return NULL;
}
// create a temporary LOB
dbType = (cxoDbType*) lobType;
if (dpiConn_newTempLob(conn->handle, dbType->num, &handle) < 0)
return cxoError_raiseAndReturnNull();
lob = cxoLob_new(conn, dbType, handle);
if (!lob)
dpiLob_release(handle);
return lob;
}
//-----------------------------------------------------------------------------
// cxoConnection_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 *cxoConnection_getVersion(cxoConnection *conn, void *unused)
{
dpiVersionInfo versionInfo;
char buffer[25];
int status, len;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_getServerVersion(conn->handle, NULL, NULL, &versionInfo);
Py_END_ALLOW_THREADS
if (status < 0)
return cxoError_raiseAndReturnNull();
len = snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d.%d",
versionInfo.versionNum, versionInfo.releaseNum,
versionInfo.updateNum, versionInfo.portReleaseNum,
versionInfo.portUpdateNum);
return PyUnicode_DecodeASCII(buffer, len, NULL);
}
//-----------------------------------------------------------------------------
// cxoConnection_getEncoding()
// Return the encoding associated with the environment of the connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getEncoding(cxoConnection *conn, void *unused)
{
return PyUnicode_DecodeASCII(conn->encodingInfo.encoding,
strlen(conn->encodingInfo.encoding), NULL);
}
//-----------------------------------------------------------------------------
// cxoConnection_getLTXID()
// Return the logical transaction id used with Transaction Guard.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getLTXID(cxoConnection *conn, void *unused)
{
uint32_t ltxidLength;
const char *ltxid;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (dpiConn_getLTXID(conn->handle, <xid, <xidLength) < 0)
return cxoError_raiseAndReturnNull();
return PyBytes_FromStringAndSize(ltxid, ltxidLength);
}
//-----------------------------------------------------------------------------
// cxoConnection_getHandle()
// Return the OCI handle used by the connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getHandle(cxoConnection *conn, void *unused)
{
void *handle;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (dpiConn_getHandle(conn->handle, &handle) < 0)
return cxoError_raiseAndReturnNull();
return PyLong_FromUnsignedLongLong((unsigned long long) handle);
}
//-----------------------------------------------------------------------------
// cxoConnection_getNationalEncoding()
// Return the national encoding associated with the environment of the
// connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getNationalEncoding(cxoConnection *conn,
void *unused)
{
return PyUnicode_DecodeASCII(conn->encodingInfo.nencoding,
strlen(conn->encodingInfo.nencoding), NULL);
}
//-----------------------------------------------------------------------------
// cxoConnection_getMaxBytesPerCharacter()
// Return the maximum number of bytes per character.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_getMaxBytesPerCharacter(cxoConnection *conn,
void *unused)
{
return PyLong_FromLong(conn->encodingInfo.maxBytesPerCharacter);
}
//-----------------------------------------------------------------------------
// cxoConnection_close()
// Close the connection, disconnecting from the database.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_close(cxoConnection *conn, PyObject *args)
{
cxoBuffer tagBuffer;
uint32_t mode;
int status;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
if (cxoBuffer_fromObject(&tagBuffer, conn->tag,
conn->encodingInfo.encoding) < 0)
return NULL;
mode = DPI_MODE_CONN_CLOSE_DEFAULT;
if (conn->tag && conn->tag != Py_None)
mode |= DPI_MODE_CONN_CLOSE_RETAG;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_close(conn->handle, mode, (char*) tagBuffer.ptr,
tagBuffer.size);
if (status == DPI_SUCCESS)
dpiConn_release(conn->handle);
Py_END_ALLOW_THREADS
cxoBuffer_clear(&tagBuffer);
if (status < 0)
return cxoError_raiseAndReturnNull();
conn->handle = NULL;
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// cxoConnection_commit()
// Commit the transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_commit(cxoConnection *conn, PyObject *args)
{
int status;
if (cxoConnection_isConnected(conn) < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
status = dpiConn_commit(conn->handle);
Py_END_ALLOW_THREADS
if (status < 0)
return cxoError_raiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// cxoConnection_begin()
// Begin a new transaction on the connection.
//-----------------------------------------------------------------------------
static PyObject *cxoConnection_begin(cxoConnection *conn, PyObject *args)
{
Py_ssize_t transactionIdLength, branchIdLength;
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