rabbitmq-c初探
RabbitMQ着实是个好东西，当然了也有对C语言client开发的支持。例子和文档少的可怜，只能去项目里去查看example来理解，简单整理了一些，以免走些弯路。主要是在版本对应上，这点就没Maven好了，只能对好类库和例子。接下来我们简单看看需要的东东。
环境：Ubuntu 13.04
rabbitmq-server 默认的3.0.2-1
librabbitmq-dev 默认的0.0.1.hg216-1
项目构造用的qmake（这样简单不少）
1 consumer
1.1 consumer.pro的内容
SOURCES=utils.cpp amqp_consumer.cpp platform_utils.cpp
HEADERS=utils.h
VPATH+=/usr/include
CONFIG+=release
TARGET=consumer
LIBS += -lrabbitmq
1.2 amqp_consumer.cpp代码
这里的代码来自于rabbitmq-c-v0.3.0 具体查看 https://github.com/alanxz/rabbitmq-c/blob/rabbitmq-c-v0.3.0/examples/amqp_consumer.c。（对于几个特殊的宏引用作了调整）
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <amqp.h>
#include <amqp_framing.h>
#include <assert.h>
#include "utils.h"
#define SUMMARY_EVERY_US 1000000
static void run(amqp_connection_state_t conn)
{
uint64_t start_time = now_microseconds();
int received = 0;
int previous_received = 0;
uint64_t previous_report_time = start_time;
uint64_t next_summary_time = start_time + SUMMARY_EVERY_US;
amqp_frame_t frame;
int result;
size_t body_received;
size_t body_target;
uint64_t now;
while (1) {
now = now_microseconds();
if (now > next_summary_time) {
int countOverInterval = received - previous_received;
double intervalRate = countOverInterval / ((now - previous_report_time) / 1000000.0);
printf("%d ms: Received %d - %d since last report (%d Hz)\n",
(int)(now - start_time) / 1000, received, countOverInterval, (int) intervalRate);
previous_received = received;
previous_report_time = now;
next_summary_time += SUMMARY_EVERY_US;
}
amqp_maybe_release_buffers(conn);
result = amqp_易做图_wait_frame(conn, &frame);
if (result < 0)
return;
if (frame.frame_type != AMQP_FRAME_METHOD)
continue;
if (frame.payload.method.id != AMQP_BASIC_DELIVER_METHOD)
continue;
result = amqp_易做图_wait_frame(conn, &frame);
if (result < 0)
return;
if (frame.frame_type != AMQP_FRAME_HEADER) {
fprintf(stderr, "Expected header!");
abort();
}
body_target = frame.payload.properties.body_size;
body_received = 0;
while (body_received < body_target) {
result = amqp_易做图_wait_frame(conn, &frame);
if (result < 0)
return;
if (frame.frame_type != AMQP_FRAME_BODY) {
fprintf(stderr, "Expected body!");
abort();
}
body_received += frame.payload.body_fragment.len;
assert(body_received <= body_target);
amqp_dump(frame.payload.body_fragment.bytes,frame.payload.body_fragment.len);
}
received++;
}
}
int main(int argc, char const * const *argv) {
char const *hostname;
int port;
char const *exchange;
char const *bindingkey;
int sockfd;
amqp_connection_state_t conn;
amqp_bytes_t queuename;
if (argc < 3) {
fprintf(stderr, "Usage: amqp_consumer host port\n");
return 1;
}
hostname = argv[1];
port = atoi(argv[2]);
exchange = "amq.direct"; /* argv[3]; */
bindingkey = "test queue"; /* argv[4]; */
conn = amqp_new_connection();
die_on_error(sockfd = amqp_open_socket(hostname, port), "Opening socket");
amqp_set_sockfd(conn, sockfd);
die_on_amqp_error(amqp_login(conn, "/", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN, "guest", "guest"),
"Logging in");
amqp_channel_open(conn, 1);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Opening channel");
{
amqp_queue_declare_ok_t *r = amqp_queue_declare(conn, 1, AMQP_EMPTY_BYTES/*amqp_empty_bytes*/, 0, 0, 0, 1,
AMQP_EMPTY_TABLE/*amqp_empty_table*/);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Declaring queue");
queuename = amqp_bytes_malloc_dup(r->queue);
if (queuename.bytes == NULL) {
fprintf(stderr, "Out of memory while copying queue name");
return 1;
}
}
amqp_queue_bind(conn, 1, queuename, amqp_cstring_bytes(exchange), amqp_cstring_bytes(bindingkey),
AMQP_EMPTY_TABLE/*amqp_empty_table*/);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Binding queue");
amqp_basic_consume(conn, 1, queuename, AMQP_EMPTY_BYTES/*amqp_empty_bytes*/, 0, 1, 0, AMQP_EMPTY_TABLE/*amqp_empty_table*/);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Consuming");
run(conn);
die_on_amqp_error(amqp_channel_close(conn, 1, AMQP_REPLY_SUCCESS), "Closing channel");
die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS), "Closing connection");
die_on_error(amqp_destroy_connection(conn), "Ending connection");
return 0;
}
2 producer
2.1 producer.pro的内容
SOURCES=utils.cpp amqp_producer.cpp platform_utils.cpp
HEADERS=utils.h
VPATH+=/usr/include
CONFIG+=release
TARGET=producer
LIBS += -lrabbitmq
2.2 amqp_producer.cpp代码
这里的代码来自于rabbitmq-c-v0.3.0 具体查看https://github.com/alanxz/rabbitmq-c/blob/rabbitmq-c-v0.3.0/examples/amqp_producer.c。(对于几个特殊的宏引用作了调整)
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <amqp.h>
#include <amqp_framing.h>
#include "utils.h"
#define SUMMARY_EVERY_US 1000000
static void send_batch(amqp_connection_state_t conn,
char const *queue_name,
补充：软件开发 , C++ ,
