c-core/09_core/core09Example_main.c

/*
 * Raima Database Manager
 *
 * Copyright (c) 2019 Raima Inc.,  All rights reserved.
 *
 * Use of this software, whether in source code format, or in executable,
 * binary object code form, is governed by the Raima LICENSE which
 * is fully described in the LICENSE.TXT file, included within this
 * distribution of files.
 */

#include <stdio.h>
#include <string.h>
#include "example_fcns.h"
#include "rdm.h"
#include "rdmstartupapi.h"

/* Generated \c struct and \c typedef definitions to be used with the RDM APIs
 */
#include "core09_structs.h"

/* Generated catalog definition to be used with the RDM rdm_dbSetCatalog() API
 */
#include "core09_cat.h"

RDM_CMDLINE cmd;
const char *const description = "Demonstrates database union read";
const RDM_CMDLINE_OPT opts[] = {{NULL, NULL, NULL, NULL}};

RDM_RETCODE display_offices (RDM_DB hDB) 
{
    RDM_RETCODE rc;
    OFFICE office_rec;
    RDM_CURSOR cursor = NULL;

    rc = rdm_dbStartRead (hDB, RDM_LOCK_ALL, 0, NULL);
    print_error (rc);

    if (rc == sOKAY)
    {
        /* The following cursor association call will allocate the cursor
         *  if the cursor is set to NULL. This short-cut can eliminate the
         *  requirement to call rdm_dbAllocCursor() before using the cursor
         *  in this function */
        rc = rdm_dbGetRowsByKey (hDB, KEY_OFFICE_NAME, &cursor);
        print_error (rc);

        for (rc = rdm_cursorMoveToFirst (cursor); rc == sOKAY;
             rc = rdm_cursorMoveToNext (cursor))
        {
            /* Read and display the current person record */
            rc = rdm_cursorReadRow (
                cursor, &office_rec, sizeof (office_rec), NULL);
            print_error (rc);
            printf ("%s\n", office_rec.name);
        }

        /* free the cursor if it was allocated */
        if (cursor)
            rdm_cursorFree (cursor);

        /* Expect rc to be S_NOTFOUND when we exit the loop */
        if (rc == sENDOFCURSOR)
        {
            rc = sOKAY;
        }
        rdm_dbEnd (hDB);
    }
    return rc;
}

RDM_RETCODE insertOffices (RDM_DB hDB, const char **officeList, size_t listSize)
{
    RDM_RETCODE rc;
    OFFICE office_rec;

    rc = rdm_dbStartUpdate (hDB, RDM_LOCK_ALL, 0, NULL, 0, NULL);
    print_error (rc);
    if (rc == sOKAY)
    {
        for (int ii = 0; ii < (int) listSize; ii++)
        {
            strncpy (office_rec.name, officeList[ii], sizeof (office_rec.name));
            rc = rdm_dbInsertRow (
                hDB, TABLE_OFFICE, &office_rec, sizeof (office_rec), NULL);
            print_error (rc);
        }

        if (rc == sOKAY)
            rc = rdm_dbEnd (hDB);
        else
            rc = rdm_dbEndRollback (hDB);

        print_error (rc);
    }
    return rc;
}

static const char *na_office_names[] = {"Seattle", "Boise", "San Francisco",
                                        "Dallas"};
static const char *emea_office_names[] = {"Paris", "London", "Dublin", "Zurich",
                                          "Madrid"};

RDM_RETCODE loadDatabase (RDM_TFS hTFS)
{
    RDM_RETCODE rc;
    RDM_DB hDB;

    rc = exampleOpenNextEmptyDatabase (hTFS, &hDB, "core09NA", core09_cat);
    if (rc == sOKAY)
    {
        /* create records in the NA database */
        rc = insertOffices (hDB, na_office_names, RLEN (na_office_names));
        rdm_dbFree (hDB);
    }

    rc = exampleOpenNextEmptyDatabase (hTFS, &hDB, "core09EMEA", core09_cat);
    if (rc == sOKAY)
    {
        /* create records in the NA database */
        rc = insertOffices (hDB, emea_office_names, RLEN (emea_office_names));
        rdm_dbFree (hDB);
    }
    return rc;
}

int main_core09 (int argc, const char *const *argv)
{
    RDM_RETCODE rc;
    RDM_TFS hTFS;
    RDM_DB hDB;

    rc = rdm_cmdlineInit (&cmd, argc, argv, description, opts);
    if (rc != sCMD_USAGE)
        print_error (rc);

    if (rc == sOKAY)
    {
        rc = exampleAllocTFS (&hTFS);
        if (rc == sOKAY)
        {
            rc = loadDatabase (hTFS);
        }
        if (rc == sOKAY)
        {
            rc = rdm_tfsAllocDatabase (hTFS, &hDB);
            print_error (rc);
        }
        if (rc == sOKAY)
        {
            /* Read from both databases (union read) */
            rc = rdm_dbOpen (hDB, "core09NA|core09EMEA", RDM_OPEN_READONLY);
            print_error (rc);

            if (rc == sOKAY)
            {
                /* Display all offices */
                printf ("\nAll Worldwide Offices\n");
                display_offices (hDB);
            }
            rdm_dbFree (hDB);
        }
        rdm_tfsFree (hTFS);
    }
    return (int) rc;
}

RDM_STARTUP_EXAMPLE (core09)