Function consumer

lib_acl_cpp/samples/beanstalk2/beanstalk.cpp:12–40

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// ���ն�����Ϣ���������߳�
static void consumer(void)
{
	acl::beanstalk conn(__addr, 10);
	// ��ָ����Ϣ�����н�����Ϣ
	if (conn.watch(__tube) == false)
	{
		printf("watch %s faile\r\n", __tube);
		return;
	}

	acl::string buf;
	unsigned long long id;

	// ��ʱ����һ����Ϣ
	if ((id = conn.reserve(buf)) == 0)
		printf("reserve failed, error: %s\r\n", conn.get_error());
	else
	{
		printf("id: %llu, buf: %s\r\n", id, buf.c_str());
		conn.delete_id(id);
	}

	// ��������һ����Ϣ
	if ((id = conn.reserve(buf, 1)) == 0)
		printf("reserve failed, error: %s\r\n", conn.get_error());
	else
		printf("id: %llu, buf: %s\r\n", id, buf.c_str());

}

static void usage(const char* procname)
{