/* * $Id: zoomtst6.c,v 1.9 2002/02/20 14:40:42 adam Exp $ * * Asynchronous multi-target client doing two searches */#include <stdio.h>#include <yaz/nmem.h>#include <yaz/xmalloc.h>#include <yaz/zoom.h>static void display_records (const char *tname, ZOOM_resultset r){    /* OK, no major errors. Look at the result count */    int pos;    printf ("%s: %d hits\n", tname, ZOOM_resultset_size(r));    /* go through all records at target */    for (pos = 0; pos < 4; pos++)    {        ZOOM_record rec = ZOOM_resultset_record (r, pos);        if (rec)        {            /* get database for record and record itself at pos */            const char *db = ZOOM_record_get (rec, "database", 0);            int len;            const char *render = ZOOM_record_get (rec, "render", &len);            /* if rec is non-null, we got a record for display */            if (rec)            {                printf ("%d %s\n", pos+1, (db ? db : "unknown"));                if (render)                    fwrite (render, 1, len, stdout);                printf ("\n");            }        }    }}int main(int argc, char **argv){    int i;    int no = argc-3;    ZOOM_connection z[500];  /* allow at most 500 connections */    ZOOM_resultset r1[500];  /* and result sets .. */    ZOOM_resultset r2[500];  /* and result sets .. */    ZOOM_query q;    ZOOM_options o;    o = ZOOM_options_create ();    if (argc < 4)    {	fprintf (stderr, "usage:\n%s target1 .. targetN query1 query2\n",		 *argv);	exit (1);    }    if (no > 500)        no = 500;    ZOOM_options_set (o, "async", "1");    /* get 3 (at most) records from beginning */    ZOOM_options_set (o, "count", "3");    ZOOM_options_set (o, "preferredRecordSyntax", "sutrs");    ZOOM_options_set (o, "elementSetName", "B");    /* create query */    q = ZOOM_query_create ();    if (ZOOM_query_prefix (q, argv[argc-2]))    {	printf ("bad PQF: %s\n", argv[argc-2]);	exit (2);    }    /* connect - and search all */    for (i = 0; i<no; i++)    {    	z[i] = ZOOM_connection_create (o);    	ZOOM_connection_connect (z[i], argv[i+1], 0);        r1[i] = ZOOM_connection_search (z[i], q);    }    if (ZOOM_query_prefix (q, argv[argc-1]))    {	printf ("bad sort spec: %s\n", argv[argc-1]);	exit (2);    }    /* queue second search */    for (i = 0; i<no; i++)        r2[i] = ZOOM_connection_search (z[i], q);    /* fetch 5th record from first result set as well */    for (i = 0; i<no; i++)        ZOOM_resultset_records (r1[i], 0, 4, 1);    /* network I/O */    while (ZOOM_event (no, z))	;    /* handle errors */    for (i = 0; i<no; i++)    {	int error;	const char *errmsg, *addinfo;	if ((error = ZOOM_connection_error(z[i], &errmsg, &addinfo)))	    fprintf (stderr, "%s error: %s (%d) %s\n",		     ZOOM_connection_option_get(z[i], "host"),		     errmsg, error, addinfo);	else	{	    display_records (ZOOM_connection_option_get(z[i], "host"), r1[i]);	    display_records (ZOOM_connection_option_get(z[i], "host"), r2[i]);	}    }    /* destroy stuff and exit */    ZOOM_query_destroy (q);    for (i = 0; i<no; i++)    {        ZOOM_connection_destroy (z[i]);        ZOOM_resultset_destroy (r1[i]);        ZOOM_resultset_destroy (r2[i]);    }    ZOOM_options_destroy(o);    exit (0);}