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//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2019, 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"
//-----------------------------------------------------------------------------
// functions for the Python type "Connection"
//-----------------------------------------------------------------------------
static void cxoConnection_free(cxoConnection*);
static PyObject *cxoConnection_new(PyTypeObject*, PyObject*, PyObject*);
static int cxoConnection_init(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_repr(cxoConnection*);
static PyObject *cxoConnection_close(cxoConnection*, PyObject*);
static PyObject *cxoConnection_commit(cxoConnection*, PyObject*);
static PyObject *cxoConnection_begin(cxoConnection*, PyObject*);
static PyObject *cxoConnection_prepare(cxoConnection*, PyObject*);
static PyObject *cxoConnection_rollback(cxoConnection*, PyObject*);
static PyObject *cxoConnection_newCursor(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_cancel(cxoConnection*, PyObject*);
static PyObject *cxoConnection_getCallTimeout(cxoConnection*, void*);
static PyObject *cxoConnection_getVersion(cxoConnection*, void*);
static PyObject *cxoConnection_getEncoding(cxoConnection*, void*);
static PyObject *cxoConnection_getNationalEncoding(cxoConnection*, void*);
static PyObject *cxoConnection_getMaxBytesPerCharacter(cxoConnection*, void*);
static PyObject *cxoConnection_contextManagerEnter(cxoConnection*, PyObject*);
static PyObject *cxoConnection_contextManagerExit(cxoConnection*, PyObject*);
static PyObject *cxoConnection_changePassword(cxoConnection*, PyObject*);
static PyObject *cxoConnection_getType(cxoConnection*, PyObject*);
static PyObject *cxoConnection_createLob(cxoConnection*, PyObject*);
static PyObject *cxoConnection_getStmtCacheSize(cxoConnection*, void*);
static PyObject *cxoConnection_newEnqueueOptions(cxoConnection*, PyObject*);
static PyObject *cxoConnection_newDequeueOptions(cxoConnection*, PyObject*);
static PyObject *cxoConnection_newMessageProperties(cxoConnection*, PyObject*,
PyObject*);
static PyObject *cxoConnection_dequeue(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_enqueue(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_ping(cxoConnection*, PyObject*);
static PyObject *cxoConnection_queue(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_shutdown(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_startup(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_subscribe(cxoConnection*, PyObject*, PyObject*);
static PyObject *cxoConnection_unsubscribe(cxoConnection*, PyObject*,
PyObject*);
static PyObject *cxoConnection_getSodaDatabase(cxoConnection*, PyObject*);
static PyObject *cxoConnection_getLTXID(cxoConnection*, void*);
static PyObject *cxoConnection_getHandle(cxoConnection*, void*);
static PyObject *cxoConnection_getCurrentSchema(cxoConnection*, void*);
static PyObject *cxoConnection_getEdition(cxoConnection*, void*);
static PyObject *cxoConnection_getExternalName(cxoConnection*, void*);
static PyObject *cxoConnection_getInternalName(cxoConnection*, void*);
static PyObject *cxoConnection_getException(cxoConnection*, void*);
static int cxoConnection_setCallTimeout(cxoConnection*, PyObject*, void*);
static int cxoConnection_setStmtCacheSize(cxoConnection*, PyObject*, void*);
static int cxoConnection_setAction(cxoConnection*, PyObject*, void*);
static int cxoConnection_setClientIdentifier(cxoConnection*, PyObject*, void*);
static int cxoConnection_setClientInfo(cxoConnection*, PyObject*, void*);
static int cxoConnection_setCurrentSchema(cxoConnection*, PyObject*, void*);
static int cxoConnection_setDbOp(cxoConnection*, PyObject*, void*);
static int cxoConnection_setExternalName(cxoConnection*, PyObject*, void*);
static int cxoConnection_setInternalName(cxoConnection*, PyObject*, void*);
static int cxoConnection_setModule(cxoConnection*, PyObject*, void*);
//-----------------------------------------------------------------------------
// declaration of methods for Python type "Connection"
//-----------------------------------------------------------------------------
static PyMethodDef cxoConnectionMethods[] = {
{ "cursor", (PyCFunction) cxoConnection_newCursor,
METH_VARARGS | METH_KEYWORDS },
{ "commit", (PyCFunction) cxoConnection_commit, METH_NOARGS },
{ "rollback", (PyCFunction) cxoConnection_rollback, METH_NOARGS },
{ "begin", (PyCFunction) cxoConnection_begin, METH_VARARGS },
{ "prepare", (PyCFunction) cxoConnection_prepare, METH_NOARGS },
{ "close", (PyCFunction) cxoConnection_close, METH_NOARGS },
{ "cancel", (PyCFunction) cxoConnection_cancel, METH_NOARGS },
{ "__enter__", (PyCFunction) cxoConnection_contextManagerEnter,
METH_NOARGS },
{ "__exit__", (PyCFunction) cxoConnection_contextManagerExit,
METH_VARARGS },
{ "ping", (PyCFunction) cxoConnection_ping, METH_NOARGS },
{ "shutdown", (PyCFunction) cxoConnection_shutdown,
METH_VARARGS | METH_KEYWORDS},
{ "startup", (PyCFunction) cxoConnection_startup,
METH_VARARGS | METH_KEYWORDS},
{ "subscribe", (PyCFunction) cxoConnection_subscribe,
METH_VARARGS | METH_KEYWORDS},
{ "unsubscribe", (PyCFunction) cxoConnection_unsubscribe,
METH_VARARGS | METH_KEYWORDS},
{ "changepassword", (PyCFunction) cxoConnection_changePassword,
METH_VARARGS },
{ "gettype", (PyCFunction) cxoConnection_getType, METH_O },
{ "deqoptions", (PyCFunction) cxoConnection_newDequeueOptions,
METH_NOARGS },
{ "enqoptions", (PyCFunction) cxoConnection_newEnqueueOptions,
METH_NOARGS },
{ "msgproperties", (PyCFunction) cxoConnection_newMessageProperties,
METH_VARARGS | METH_KEYWORDS },
{ "deq", (PyCFunction) cxoConnection_dequeue,
METH_VARARGS | METH_KEYWORDS },
{ "enq", (PyCFunction) cxoConnection_enqueue,
METH_VARARGS | METH_KEYWORDS },
{ "queue", (PyCFunction) cxoConnection_queue,
METH_VARARGS | METH_KEYWORDS },
{ "createlob", (PyCFunction) cxoConnection_createLob, METH_O },
{ "getSodaDatabase", (PyCFunction) cxoConnection_getSodaDatabase,
METH_NOARGS },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of members for Python type "Connection"
//-----------------------------------------------------------------------------
static PyMemberDef cxoConnectionMembers[] = {
{ "username", T_OBJECT, offsetof(cxoConnection, username), READONLY },
{ "dsn", T_OBJECT, offsetof(cxoConnection, dsn), READONLY },
{ "tnsentry", T_OBJECT, offsetof(cxoConnection, dsn), READONLY },
{ "tag", T_OBJECT, offsetof(cxoConnection, tag), 0 },
{ "autocommit", T_INT, offsetof(cxoConnection, autocommit), 0 },
{ "inputtypehandler", T_OBJECT,
offsetof(cxoConnection, inputTypeHandler), 0 },
{ "outputtypehandler", T_OBJECT,
offsetof(cxoConnection, outputTypeHandler), 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of calculated members for Python type "Connection"
//-----------------------------------------------------------------------------
static PyGetSetDef cxoConnectionCalcMembers[] = {
{ "version", (getter) cxoConnection_getVersion, 0, 0, 0 },
{ "encoding", (getter) cxoConnection_getEncoding, 0, 0, 0 },
{ "nencoding", (getter) cxoConnection_getNationalEncoding, 0, 0, 0 },
{ "callTimeout", (getter) cxoConnection_getCallTimeout,
(setter) cxoConnection_setCallTimeout, 0, 0 },
{ "maxBytesPerCharacter", (getter) cxoConnection_getMaxBytesPerCharacter,
0, 0, 0 },
{ "stmtcachesize", (getter) cxoConnection_getStmtCacheSize,
(setter) cxoConnection_setStmtCacheSize, 0, 0 },
{ "module", 0, (setter) cxoConnection_setModule, 0, 0 },
{ "action", 0, (setter) cxoConnection_setAction, 0, 0 },
{ "clientinfo", 0, (setter) cxoConnection_setClientInfo, 0, 0 },
{ "client_identifier", 0, (setter) cxoConnection_setClientIdentifier, 0,
0 },
{ "current_schema", (getter) cxoConnection_getCurrentSchema,
(setter) cxoConnection_setCurrentSchema, 0, 0 },
{ "external_name", (getter) cxoConnection_getExternalName,
(setter) cxoConnection_setExternalName, 0, 0 },
{ "internal_name", (getter) cxoConnection_getInternalName,
(setter) cxoConnection_setInternalName, 0, 0 },
{ "dbop", 0, (setter) cxoConnection_setDbOp, 0, 0 },
{ "edition", (getter) cxoConnection_getEdition, 0, 0, 0 },
{ "ltxid", (getter) cxoConnection_getLTXID, 0, 0, 0 },
{ "handle", (getter) cxoConnection_getHandle, 0, 0, 0 },
{ "Error", (getter) cxoConnection_getException, NULL, NULL,
&cxoErrorException },
{ "Warning", (getter) cxoConnection_getException, NULL, NULL,
&cxoWarningException },
{ "InterfaceError", (getter) cxoConnection_getException, NULL, NULL,
&cxoInterfaceErrorException },
{ "DatabaseError", (getter) cxoConnection_getException, NULL, NULL,
&cxoDatabaseErrorException },
{ "InternalError", (getter) cxoConnection_getException, NULL, NULL,
&cxoInternalErrorException },
{ "OperationalError", (getter) cxoConnection_getException, NULL, NULL,
&cxoOperationalErrorException },
{ "ProgrammingError", (getter) cxoConnection_getException, NULL, NULL,
&cxoProgrammingErrorException },
{ "IntegrityError", (getter) cxoConnection_getException, NULL, NULL,
&cxoIntegrityErrorException },
{ "DataError", (getter) cxoConnection_getException, NULL, NULL,
&cxoDataErrorException },
{ "NotSupportedError", (getter) cxoConnection_getException, NULL, NULL,
&cxoNotSupportedErrorException },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of Python type "Connection"
//-----------------------------------------------------------------------------
PyTypeObject cxoPyTypeConnection = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.Connection", // tp_name
sizeof(cxoConnection), // tp_basicsize
0, // tp_itemsize
(destructor) cxoConnection_free, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
(reprfunc) cxoConnection_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
cxoConnectionMethods, // tp_methods
cxoConnectionMembers, // tp_members
cxoConnectionCalcMembers, // tp_getset
0, // tp_base
0, // tp_dict
0, // tp_descr_get
0, // tp_descr_set
0, // tp_dictoffset
(initproc) cxoConnection_init, // tp_init
0, // tp_alloc
(newfunc) cxoConnection_new, // tp_new
0, // tp_free
0, // tp_is_gc
0 // tp_bases
};
//-----------------------------------------------------------------------------
// 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_getNumFromValue(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_Malloc(numColumns * sizeof(dpiShardingKeyColumn));
buffers = PyMem_Malloc(numColumns * sizeof(cxoBuffer));
if (isSuperShardingKey) {
params->superShardingKeyColumns = columns;
params->superShardingKeyBuffers = buffers;
params->numSuperShardingKeyColumns = numColumns;
} else {
params->shardingKeyColumns = columns;
params->shardingKeyBuffers = buffers;
params->numShardingKeyColumns = numColumns;
}
if (!columns || !buffers) {
PyErr_NoMemory();
return -1;
}
// process each value
for (i = 0; i < numColumns; i++) {
cxoBuffer_init(&buffers[i]);
value = PySequence_GetItem(shardingKeyObj, i);
if (!value)
return -1;
if (cxoConnectionParams_processShardingKeyValue(params, value,
&columns[i], &buffers[i]) < 0)
return -1;
}
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 cxoPyString_fromEncodedString(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 (!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 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 cxoConnection_splitComponent(PyObject **sourceObj,
PyObject **targetObj, const char *splitString, int first)
{
PyObject *temp, *posObj;
Py_ssize_t size, pos;
char *methodName;
if (!*sourceObj || *targetObj)
return 0;
methodName = (first) ? "find" : "rfind";
posObj = PyObject_CallMethod(*sourceObj, methodName, "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;
}
//-----------------------------------------------------------------------------
// cxoConnection_init()
// Initialize the connection members.
//-----------------------------------------------------------------------------
static int cxoConnection_init(cxoConnection *conn, PyObject *args,
PyObject *keywordArgs)
{
PyObject *tagObj, *matchAnyTagObj, *threadedObj, *eventsObj, *contextObj;
PyObject *usernameObj, *passwordObj, *dsnObj, *cclassObj, *editionObj;
PyObject *shardingKeyObj, *superShardingKeyObj, *tempObj;
int status, temp, invokeSessionCallback;
dpiCommonCreateParams dpiCommonParams;
dpiConnCreateParams dpiCreateParams;
unsigned long long externalHandle;
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", NULL };
// parse arguments
pool = NULL;
tagObj = Py_None;
externalHandle = 0;
passwordObj = dsnObj = cclassObj = editionObj = NULL;
threadedObj = eventsObj = newPasswordObj = usernameObj = NULL;
matchAnyTagObj = contextObj = shardingKeyObj = superShardingKeyObj = NULL;
if (cxoUtils_initializeDPI() < 0)
return -1;
if (dpiContext_initCommonCreateParams(cxoDpiContext, &dpiCommonParams) < 0)
return cxoError_raiseAndReturnInt();
dpiCommonParams.driverName = CXO_DRIVER_NAME;
dpiCommonParams.driverNameLength =
(uint32_t) strlen(dpiCommonParams.driverName);
if (dpiContext_initConnCreateParams(cxoDpiContext, &dpiCreateParams) < 0)
return cxoError_raiseAndReturnInt();
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs,
"|OOOiKO!OOOiOssOOOOOO", keywordList, &usernameObj, &passwordObj,
&dsnObj, &dpiCreateParams.authMode, &externalHandle,
&cxoPyTypeSessionPool, &pool, &threadedObj, &eventsObj, &cclassObj,
&dpiCreateParams.purity, &newPasswordObj,
&dpiCommonParams.encoding, &dpiCommonParams.nencoding, &editionObj,
&contextObj, &tagObj, &matchAnyTagObj, &shardingKeyObj,
&superShardingKeyObj))
return -1;
dpiCreateParams.externalHandle = (void*) externalHandle;
if (cxoUtils_getBooleanValue(threadedObj, 0, &temp) < 0)
return -1;
if (temp)
dpiCommonParams.createMode |= DPI_MODE_CREATE_THREADED;
if (cxoUtils_getBooleanValue(eventsObj, 0, &temp) < 0)
return -1;
if (temp)
dpiCommonParams.createMode |= DPI_MODE_CREATE_EVENTS;
if (cxoUtils_getBooleanValue(matchAnyTagObj, 0,
&dpiCreateParams.matchAnyTag) < 0)
return -1;
// keep a copy of the user name and connect string (DSN)
Py_XINCREF(usernameObj);
conn->username = usernameObj;
Py_XINCREF(dsnObj);
conn->dsn = dsnObj;
// perform some parsing, if necessary
if (cxoConnection_splitComponent(&conn->username, &passwordObj, "/", 1) < 0)
return -1;
if (cxoConnection_splitComponent(&passwordObj, &conn->dsn, "@", 0) < 0)
return -1;
// 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)
return cxoConnectionParams_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;
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 actal 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 = cxoPyString_fromEncodedString(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 PyInt_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 (!PyInt_Check(value)) {
PyErr_SetString(PyExc_TypeError, "value must be an integer");
return -1;
}
cacheSize = (uint32_t) PyInt_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 PyInt_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;
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