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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// NAME
// DemoTokenPoolWithCallback.c
//
// DESCRIPTION
// This demo file shows connection pooling with token based authentication to
// Oracle Autonomous Database from Oracle Compute Infrastructure. It shows
// how to create a connection pool and update expired tokens.
//
// PREREQUISITES
// - Oracle Client libraries 19.14 (or later), or 21.5 (or later).
//
// - The Oracle Cloud Infrastructure command line interface (OCI-CLI). The
// command line interface (CLI) is a tool that enables you to work with
// Oracle Cloud Infrastructure objects and services at a command line, see
// https://docs.oracle.com/en-us/iaas/Content/API/Concepts/cliconcepts.htm
//
// - Set these environment variables (see the code explanation):
// ODPIC_SAMPLES_ACCESS_TOKEN_LOC
// ODPIC_SAMPLES_CONNECT_STRING
// ODPIC_SAMPLES_EXPIRED_ACCESS_TOKEN_LOC
//-----------------------------------------------------------------------------
#include "SampleLib.h"
//-----------------------------------------------------------------------------
// tokenCallback()
//-----------------------------------------------------------------------------
int tokenCallback(void *context, dpiAccessToken *tokenRefresh)
{
printf("Token callback is called.\n");
// used for extracting the token and private key from files generated
// through the OCI-CLI.
dpiAccessToken *accessToken;
accessToken = dpiSamples_getAccessToken();
tokenRefresh->token = accessToken->token;
tokenRefresh->tokenLength = accessToken->tokenLength;
tokenRefresh->privateKey = accessToken->privateKey;
tokenRefresh->privateKeyLength = accessToken->privateKeyLength;
return DPI_SUCCESS;
}
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiConn *conn1, *conn2;
dpiPool *pool;
dpiSampleParams *params;
dpiAccessToken *accessToken;
accessToken = dpiSamples_getAccessToken();
params = dpiSamples_getParams();
dpiPoolCreateParams poolCreateParams;
if (dpiContext_initPoolCreateParams(params->context,
&poolCreateParams) < 0)
return dpiSamples_showError();
// params for token based authentication:
// accessTokenCallback: A callback function to provide a refreshed token
// externalAuth: Must be set to true for token based authentication
// homogeneous: Must be set to true for token based authentication
poolCreateParams.minSessions = 1;
poolCreateParams.maxSessions = 10;
poolCreateParams.sessionIncrement = 1;
poolCreateParams.externalAuth = 1;
poolCreateParams.homogeneous = 1;
poolCreateParams.accessTokenCallback = tokenCallback;
dpiCommonCreateParams commonCreateParams;
if (dpiContext_initCommonCreateParams(params->context,
&commonCreateParams) < 0)
return dpiSamples_showError();
commonCreateParams.accessToken = accessToken;
if (dpiPool_create(params->context, NULL, 0, NULL, 0,
params->connectString, params->connectStringLength,
&commonCreateParams, &poolCreateParams, &pool) < 0)
return dpiSamples_showError();
printf("Connection pool is created.\n");
if (dpiPool_acquireConnection(pool, NULL, 0, NULL, 0, NULL,
&conn1) < 0)
return dpiSamples_showError();
printf("Session is acquired from connection pool.\n");
// set expired token and private key in connection pool
dpiAccessToken expiredAccessToken;
dpiSamples_populateAccessToken(&expiredAccessToken,
"ODPIC_SAMPLES_EXPIRED_ACCESS_TOKEN_LOC");
if (dpiPool_setAccessToken(pool, &expiredAccessToken) < 0)
return dpiSamples_showError();
// accessTokenCallback will get invoked to get refreshed tokens
if (dpiPool_acquireConnection(pool, NULL, 0, NULL, 0, NULL,
&conn2) < 0)
return dpiSamples_showError();
printf("Session is acquired from connection pool.\n");
printf("Done.\n");
return 0;
}
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