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/*-
* Public Domain 2008-2014 WiredTiger, Inc.
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ex_async.c
* demonstrates how to use the asynchronous API.
*/
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <wiredtiger.h>
const char *home = NULL;
const char *uri = "table:async";
uint64_t search_id = -1;
int global_error = 0;
/*! [example callback implementation] */
static int
cb_asyncop(WT_ASYNC_CALLBACK *cb, WT_ASYNC_OP *op, int ret, uint32_t flags)
{
WT_ASYNC_OPTYPE type;
WT_ITEM k, v;
const char *key, *value;
uint64_t id;
int t_ret;
(void)cb;
(void)flags;
/*! [Get type] */
type = op->get_type(op);
/*! [Get type] */
/*! [Get identifier] */
id = op->get_id(op);
/*! [Get identifier] */
t_ret = 0;
if (ret != 0) {
printf("ID %" PRIu64 " error %d\n", id, ret);
global_error = ret;
return (1);
}
if (type == WT_AOP_SEARCH) {
/*! [Get the op's string key] */
t_ret = op->get_key(op, &k);
key = k.data;
/*! [Get the op's string key] */
/*! [Get the op's string value] */
t_ret = op->get_value(op, &v);
value = v.data;
/*! [Get the op's string value] */
printf("Id %" PRIu64 " got record: %s : %s\n", id, key, value);
}
return (t_ret);
}
static WT_ASYNC_CALLBACK cb = { cb_asyncop };
/*! [example callback implementation] */
#define MAX_KEYS 15
int main(void)
{
/*! [example connection] */
WT_ASYNC_OP *op;
WT_CONNECTION *wt_conn;
WT_SESSION *session;
int i, ret;
char k[MAX_KEYS][16], v[MAX_KEYS][16];
if ((ret = wiredtiger_open(home, NULL,
"create,cache_size=100MB,async=(enabled=true,ops_max=10,threads=2)",
&wt_conn)) != 0) {
fprintf(stderr, "Error connecting to %s: %s\n",
home, wiredtiger_strerror(ret));
return (ret);
}
/*! [example connection] */
/*! [example table create] */
ret = wt_conn->open_session(wt_conn, NULL, NULL, &session);
ret = session->create(session, uri,
"key_format=S,value_format=S");
/*! [example table create] */
for (i = 0; i < MAX_KEYS; i++) {
/*! [Allocate a handle] */
op = NULL;
retry:
ret = wt_conn->async_new_op(wt_conn, uri, NULL, &cb, &op);
if (ret != 0) {
/*
* If we used up all the ops, pause and retry to
* give the workers a chance to process them.
*/
fprintf(stderr,
"Iteration %d: async_new_op ret %d\n",i,ret);
sleep(1);
goto retry;
}
/*! [Allocate a handle] */
snprintf(k[i], sizeof(k), "key%d", i);
snprintf(v[i], sizeof(v), "value%d", i);
/*! [Set the op's string key] */
op->set_key(op, k[i]);
/*! [Set the op's string key] */
/*! [Set the op's string value] */
op->set_value(op, v[i]);
/*! [Set the op's string value] */
/*! [example insert] */
ret = op->insert(op);
/*! [example insert] */
}
/*! [flush] */
wt_conn->async_flush(wt_conn);
/*! [flush] */
for (i = 0; i < MAX_KEYS; i++) {
op = NULL;
retry2:
ret = wt_conn->async_new_op(wt_conn, uri, NULL, &cb, &op);
if (ret != 0) {
/*
* If we used up all the ops, pause and retry to
* give the workers a chance to process them.
*/
fprintf(stderr,
"Iteration %d: async_new_op ret %d\n",i,ret);
sleep(1);
goto retry2;
}
snprintf(k[i], sizeof(k), "key%d", i);
op->set_key(op, k[i]);
/*! [search] */
op->search(op);
/*! [search] */
}
/*! [example close] */
/*
* Connection close automatically does an async_flush so it will
* allow all queued search operations to complete.
*/
ret = wt_conn->close(wt_conn, NULL);
/*! [example close] */
return (ret);
}
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