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//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2022, Oracle and/or its affiliates.
//
// This software is dual-licensed to you under the Universal Permissive License
// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
// either license.
//
// If you elect to accept the software under the Apache License, Version 2.0,
// the following applies:
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoAppContext.c
// Demos the use of application context.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define APP_CTX_NAMESPACE "CLIENTCONTEXT"
#define APP_CTX_NUM_KEYS 3
#define SQL_TEXT_GET_CTX "select sys_context(:1, :2) from dual"
static const char *gc_ContextKeys[APP_CTX_NUM_KEYS] =
{ "ATTR1", "ATTR2", "ATTR3" };
static const char *gc_ContextValues[APP_CTX_NUM_KEYS] =
{ "VALUE1", "VALUE2", "VALUE3" };
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiData *namespaceData, *keyData, *valueData;
uint32_t numQueryColumns, i, bufferRowIndex;
dpiAppContext appContext[APP_CTX_NUM_KEYS];
dpiVar *namespaceVar, *keyVar, *valueVar;
dpiConnCreateParams createParams;
dpiSampleParams *params;
dpiStmt *stmt;
dpiConn *conn;
int found;
// get parameters
params = dpiSamples_getParams();
// populate app context
for (i = 0; i < APP_CTX_NUM_KEYS; i++) {
appContext[i].namespaceName = APP_CTX_NAMESPACE;
appContext[i].namespaceNameLength = strlen(APP_CTX_NAMESPACE);
appContext[i].name = gc_ContextKeys[i];
appContext[i].nameLength = strlen(gc_ContextKeys[i]);
appContext[i].value = gc_ContextValues[i];
appContext[i].valueLength = strlen(gc_ContextValues[i]);
}
// connect to the database
if (dpiContext_initConnCreateParams(params->context, &createParams) < 0)
return dpiSamples_showError();
createParams.appContext = appContext;
createParams.numAppContext = APP_CTX_NUM_KEYS;
if (dpiConn_create(params->context, params->mainUserName,
params->mainUserNameLength, params->mainPassword,
params->mainPasswordLength, params->connectString,
params->connectStringLength, NULL, &createParams, &conn) < 0)
return dpiSamples_showError();
// prepare statement for multiple execution
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_GET_CTX,
strlen(SQL_TEXT_GET_CTX), NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_setFetchArraySize(stmt, 1) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_VARCHAR, DPI_NATIVE_TYPE_BYTES,
1, 30, 1, 0, NULL, &namespaceVar, &namespaceData) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_VARCHAR, DPI_NATIVE_TYPE_BYTES,
1, 30, 1, 0, NULL, &keyVar, &keyData) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_VARCHAR, DPI_NATIVE_TYPE_BYTES,
1, 30, 1, 0, NULL, &valueVar, &valueData) < 0)
return dpiSamples_showError();
// get the values for each key
for (i = 0; i < APP_CTX_NUM_KEYS; i++) {
if (dpiVar_setFromBytes(namespaceVar, 0, APP_CTX_NAMESPACE,
strlen(APP_CTX_NAMESPACE)) < 0)
return dpiSamples_showError();
if (dpiVar_setFromBytes(keyVar, 0, gc_ContextKeys[i],
strlen(gc_ContextKeys[i])) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 1, namespaceVar) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 2, keyVar) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, DPI_MODE_EXEC_DEFAULT, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_define(stmt, 1, valueVar) < 0)
return dpiSamples_showError();
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
printf("Value of context key %s is %.*s\n", gc_ContextKeys[i],
valueData->value.asBytes.length,
valueData->value.asBytes.ptr);
}
// clean up
dpiVar_release(namespaceVar);
dpiVar_release(keyVar);
dpiVar_release(valueVar);
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}
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