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RabbitMQ.cpp
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RabbitMQ.cpp
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#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <cstdint>
#include <vector>
#include <map>
#include <boost/algorithm/string.hpp>
#include "RabbitMQ.h"
// https://github.com/alanxz/rabbitmq-c/issues/211
// Additionally: you should call amqp_maybe_release_buffers_on_channel() after consuming each message.
//
// 总体来说，rabbitmq-c内部的内存缓存，除非在发消息、收消息这种高频重复要主动调用
// amqp_maybe_release_buffers(_on_channel)来主动释放防止占用过多内存，其他情况下
// 调用这种函数收效甚微，而且在关闭的connection上调用该函数会crash
// 所以目前的策略是：仅在成功操作的情况下主动调用该函数，防止库导致服务异常挂起
namespace AMQP {
static int amqp_bytes_malloc_dup_failed(amqp_bytes_t bytes) {
if (bytes.len != 0 && bytes.bytes == NULL) {
return 1;
}
return 0;
}
std::string RabbitMQHelper::brokerVersion() {
const amqp_table_t *properties = amqp_get_server_properties(connection_);
const amqp_bytes_t version = amqp_cstring_bytes("version");
amqp_table_entry_t *version_entry = NULL;
for (int i = 0; i < properties->num_entries; ++i) {
if (0 == strncmp((const char *)properties->entries[i].key.bytes, (const char *)version.bytes, version.len)) {
version_entry = &properties->entries[i];
break;
}
}
if (NULL == version_entry)
return std::string();
std::string version_string(
static_cast<char *>(version_entry->value.value.bytes.bytes),
version_entry->value.value.bytes.len);
return version_string;
}
// class RabbitChannel
amqp_channel_t RabbitMQHelper::createChannel() {
amqp_channel_t t;
if ( (t = getChannelId()) <= 0) {
LOG_API("getChannelId failed!");
return -1;
}
std::shared_ptr<RabbitChannel> pChannel;
pChannel.reset(new RabbitChannel(t, *this));
if (!pChannel || pChannel->initChannel() < 0) {
freeChannelId(t);
return -1;
}
channels_[t] = pChannel; // insert it!!
LOG_API("created channel: %d", t);
return t;
}
int RabbitMQHelper::closeChannel(amqp_channel_t channel){
std::map<amqp_channel_t, std::shared_ptr<RabbitChannel> >::iterator it;
it = channels_.find(channel);
if (it == channels_.end()) {
return -1;
}
it->second->closeChannel();
return 0;
}
int RabbitMQHelper::freeChannel(amqp_channel_t channel) {
std::map<amqp_channel_t, std::shared_ptr<RabbitChannel> >::iterator it;
it = channels_.find(channel);
if (it == channels_.end()) {
return -1;
}
channels_.erase(channel); // auto call closeChannel()
freeChannelId(channel);
return 0;
}
bool RabbitMQHelper::isChannelOpen(amqp_channel_t channel) {
std::map<amqp_channel_t, std::shared_ptr<RabbitChannel> >::iterator it;
it = channels_.find(channel);
if (it == channels_.end())
return false;
return it->second->isChannelOpen();
}
void RabbitMQHelper::closeConnection() {
if (!is_connected_)
return;
is_connected_ = false;
// 我们必须在这里强迫先析构Channel，然后才能析构connection_，否则
// 顺序倒了会导致Channel析构的时候段错误 SIGSEGV
//
// though when connection close, close all channel. though the lib did these implicity
//
std::map<amqp_channel_t, std::shared_ptr<RabbitChannel> >::iterator it;
for (it=channels_.begin(); it!=channels_.end(); ++it) {
if (it->second)
it->second->closeChannel();
}
channels_.clear();
LOG_API("Connection is closing...");
amqp_connection_close(connection_, AMQP_REPLY_SUCCESS);
amqp_destroy_connection(connection_); //atomatically free resources
}
int RabbitMQHelper::checkAndRepairChannel(amqp_channel_t& channel,
RabbitChannelSetupFunc func, void* pArg){
if (isConnectionOpen() && isChannelOpen(channel))
return 0;
if (!isConnectionOpen()) {
if (!doConnect()) {
LOG_API("Connect Failed!");
return -1;
}
}
if (!isChannelOpen(channel)) {
freeChannel(channel);
channel = createChannel();
if (channel <= 0) {
LOG_API("Create Channel Failed!");
return -1;
}
if (!setupChannel(channel, func, pArg)) {
freeChannel(channel);
LOG_API("Setup Channel Failed!");
return -1;
}
}
return 0;
}
bool RabbitMQHelper::setupChannel(amqp_channel_t channel, RabbitChannelSetupFunc func, void* pArg){
if (!isChannelOpen(channel))
return false;
return func(channelInstance(channel), pArg);
}
int RabbitMQHelper::basicRecover(amqp_channel_t channel, const std::string &consumer) {
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicRecover(consumer);
}
int RabbitMQHelper::basicPublish(amqp_channel_t channel, const std::string &exchange_name,
const std::string &routing_key, bool mandatory, bool immediate,
const std::string &message) {
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicPublish(exchange_name, routing_key, mandatory, immediate, message);
}
int RabbitMQHelper::basicGet(amqp_channel_t channel, RabbitMessage& rabbit_msg,
const std::string &queue, bool no_ack) {
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicGet(rabbit_msg, queue, no_ack);
}
int RabbitMQHelper::basicAck(amqp_channel_t channel, uint64_t delivery_tag,
bool multiple){
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicAck(delivery_tag, multiple);
}
int RabbitMQHelper::basicReject(amqp_channel_t channel, uint64_t delivery_tag,
bool requeue){
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicReject(delivery_tag, requeue);
}
int RabbitMQHelper::basicNack(amqp_channel_t channel, uint64_t delivery_tag,
bool requeue, bool multiple /* = false */ ){
if (!isChannelOpen(channel))
return -1;
return channelInstance(channel)->basicNack(delivery_tag, requeue, multiple);
}
//
// RabbitChannel
//
int RabbitChannel::amqpErrorCheck(amqp_rpc_reply_t x, const char* context) {
int retCode = -1;
switch (x.reply_type) {
case AMQP_RESPONSE_NORMAL:
retCode = 0;
break;
case AMQP_RESPONSE_NONE:
LOG_API("%s missing RPC reply type!\n", context); // conn error
break;
case AMQP_RESPONSE_LIBRARY_EXCEPTION:
// If we're getting this likely is the socket is already closed
LOG_API("%s: %s\n", context, amqp_error_string2(x.library_error));
closeConnection();
break;
case AMQP_RESPONSE_SERVER_EXCEPTION:
switch (x.reply.id) {
case AMQP_CONNECTION_CLOSE_METHOD: {
amqp_connection_close_t *m = (amqp_connection_close_t *) x.reply.decoded;
LOG_API("%s: server connection error %uh, message: %.*s\n",
context,
m->reply_code,
(int) m->reply_text.len, (char *) m->reply_text.bytes);
LOG_API("Close connection");
closeConnection();
break;
}
case AMQP_CHANNEL_CLOSE_METHOD: {
amqp_channel_close_t *m = (amqp_channel_close_t *) x.reply.decoded;
LOG_API("%s: server channel error %uh, message: %.*s\n",
context,
m->reply_code,
(int) m->reply_text.len, (char *) m->reply_text.bytes);
LOG_API("Close channel: %d", id_);
closeChannel();
break;
}
default: {
LOG_API("%s: unknown server error, method id 0x%08X\n", context, x.reply.id);
closeConnection();
break;
}
}
break;
default:
break;
}
return retCode;
}
int RabbitChannel::setConfirmSelect(){
if (!isChannelOpen())
return -1;
amqp_confirm_select_t select = {};
select.nowait = false;
amqp_confirm_select_ok_t *r = amqp_confirm_select(mqHelper_.connection_, id_);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("setConfirmSelect return with: %d", ret_code);
return -1;
}
if (res.reply.id != AMQP_CONFIRM_SELECT_OK_METHOD) {
LOG_API("expecting AMQP_CONFIRM_SELECT_OK_METHOD, but get reply.id: %d", res.reply.id);
return -1;
}
is_publish_confirm_ = true;
LOG_API("Channel will work in confirm mode...");
return 0;
}
int RabbitChannel::declareExchange(const std::string &exchange_name,
const std::string &exchange_type,
bool passive, bool durable, bool auto_delete) {
amqp_exchange_declare_t declare = {};
declare.exchange = amqp_cstring_bytes(exchange_name.c_str());
declare.type = amqp_cstring_bytes(exchange_type.c_str()); // direct fanout topic
declare.passive = passive;
declare.durable = durable;
declare.auto_delete = auto_delete;
declare.internal = false;
declare.nowait = false;
#if 1 //AMQP_VERSION_MINOR == 4
amqp_exchange_declare_ok_t *r = amqp_exchange_declare(mqHelper_.connection_, id_, declare.exchange,
declare.type, declare.passive, declare.durable, amqp_empty_table);
#else
amqp_exchange_declare_ok_t *r = amqp_exchange_declare(mqHelper_.connection_, id_, declare.exchange,
declare.type, declare.passive, declare.durable,
declare.auto_delete, declare.internal, amqp_empty_table);
#endif
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_exchange_declare error with: %d", ret_code);
return -1;
}
return 0;
}
int RabbitChannel::deleteExchange(const std::string &exchange_name,
bool if_unused) {
amqp_exchange_delete_t del = {};
del.exchange = amqp_cstring_bytes(exchange_name.c_str());
del.if_unused = if_unused;
del.nowait = false;
amqp_exchange_delete_ok_t *r = amqp_exchange_delete(mqHelper_.connection_, id_, del.exchange, del.if_unused);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_exchange_delete error with: %d", ret_code);
return -1;
}
return 0;
}
int RabbitChannel::bindExchange(const std::string &destination,
const std::string &source, const std::string &routing_key) {
amqp_exchange_bind_t bind = {};
bind.destination = amqp_cstring_bytes(destination.c_str());
bind.source = amqp_cstring_bytes(source.c_str());
bind.routing_key = amqp_cstring_bytes(routing_key.c_str());
bind.nowait = false;
amqp_exchange_bind_ok_t *r = amqp_exchange_bind(mqHelper_.connection_, id_, bind.destination,
bind.source, bind.routing_key ,
amqp_empty_table);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_exchange_bind error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::unbindExchange(const std::string &destination,
const std::string &source, const std::string &routing_key) {
amqp_exchange_unbind_t unbind = {};
unbind.destination = amqp_cstring_bytes(destination.c_str());
unbind.source = amqp_cstring_bytes(source.c_str());
unbind.routing_key = amqp_cstring_bytes(routing_key.c_str());
unbind.nowait = false;
amqp_exchange_unbind_ok_t *r = amqp_exchange_unbind(mqHelper_.connection_, id_, unbind.destination,
unbind.source, unbind.routing_key,
amqp_empty_table);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_exchange_unbind error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
// QUEUE
int RabbitChannel::declareQueue(const std::string &queue_name,
uint32_t &message_count, uint32_t &consumer_count,
bool passive, bool durable,
bool exclusive, bool auto_delete) {
amqp_queue_declare_t declare = {};
declare.queue = amqp_cstring_bytes(queue_name.c_str());
declare.passive = passive;
declare.durable = durable;
declare.exclusive = exclusive;
declare.auto_delete = auto_delete;
declare.nowait = false;
amqp_queue_declare_ok_t *r = amqp_queue_declare(mqHelper_.connection_, id_, declare.queue, declare.passive, declare.durable,
declare.exclusive, declare.auto_delete, amqp_empty_table);
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_queue_declare error with: %d", ret_code);
return -1;
}
std::string ret((char *)r->queue.bytes, r->queue.len);
message_count = r->message_count;
consumer_count = r->consumer_count;
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::deleteQueue(const std::string &queue_name,
bool if_unused, bool if_empty) {
amqp_queue_delete_t del = {};
del.queue = amqp_cstring_bytes(queue_name.c_str());
del.if_unused = if_unused;
del.if_empty = if_empty;
del.nowait = false;
amqp_queue_delete_ok_t *r = amqp_queue_delete(mqHelper_.connection_, id_, del.queue, del.if_unused, del.if_empty);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_queue_delete error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::bindQueue(const std::string &queue_name,
const std::string &exchange_name,
const std::string &routing_key) {
amqp_queue_bind_t bind = {};
bind.queue = amqp_cstring_bytes(queue_name.c_str());
bind.exchange = amqp_cstring_bytes(exchange_name.c_str());
bind.routing_key = amqp_cstring_bytes(routing_key.c_str());
bind.nowait = false;
amqp_queue_bind_ok_t *r = amqp_queue_bind(mqHelper_.connection_, id_, bind.queue, bind.exchange, bind.routing_key, amqp_empty_table);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_queue_bind error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::unbindQueue(const std::string &queue_name,
const std::string &exchange_name, const std::string &routing_key) {
amqp_queue_unbind_t unbind = {};
unbind.queue = amqp_cstring_bytes(queue_name.c_str());
unbind.exchange = amqp_cstring_bytes(exchange_name.c_str());
unbind.routing_key = amqp_cstring_bytes(routing_key.c_str());
amqp_queue_unbind_ok_t *r = amqp_queue_unbind(mqHelper_.connection_, id_, unbind.queue, unbind.exchange, unbind.routing_key, amqp_empty_table);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_queue_unbind error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::purgeQueue(const std::string &queue_name) {
amqp_queue_purge_t purge = {};
purge.queue = amqp_cstring_bytes(queue_name.c_str());
purge.nowait = false;
amqp_queue_purge_ok_t *r = amqp_queue_purge(mqHelper_.connection_, id_, purge.queue);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_queue_purge error with: %d", ret_code);
return -1;
}
return 0;
}
int RabbitChannel::basicAck(uint64_t delivery_tag, bool multiple /* = false */ ) {
amqp_basic_ack_t info = {};
info.delivery_tag = delivery_tag;
info.multiple = multiple;
int retCode = amqp_basic_ack(mqHelper_.connection_, id_, info.delivery_tag, info.multiple);
if (retCode == 0)
return 0;
closeConnection();
return -1;
}
int RabbitChannel::basicReject(uint64_t delivery_tag, bool requeue) {
if (!isChannelOpen())
return -1;
amqp_basic_reject_t req;
req.delivery_tag = delivery_tag;
req.requeue = requeue;
int retCode = amqp_basic_reject(mqHelper_.connection_, id_, req.delivery_tag, req.requeue);
if (retCode == 0)
return 0;
closeConnection();
return -1;
}
// 相比basicReject，可以批量的否决
int RabbitChannel::basicNack(uint64_t delivery_tag, bool requeue, bool multiple /* = false */ ) {
if (!isChannelOpen())
return -1;
amqp_basic_nack_t req;
req.delivery_tag = delivery_tag;
req.requeue = requeue;
req.multiple = multiple;
int retCode = amqp_basic_nack(mqHelper_.connection_, id_, req.delivery_tag, req.multiple, req.requeue);
if (retCode == 0)
return 0;
closeConnection();
return -1;
}
int RabbitChannel::basicQos(uint16_t message_prefetch_count, bool global_set) {
if (!isChannelOpen()){
LOG_API("channel is not open");
return -1;
}
amqp_basic_qos_t qos = {};
qos.prefetch_size = 0; // not implemented for RabbitMQ
qos.prefetch_count = message_prefetch_count;
qos.global = global_set;
if (qos.prefetch_count != 1) {
LOG_API("Attention: qos.prefetch_count = %d", qos.prefetch_count);
}
amqp_basic_qos_ok_t *r = amqp_basic_qos(mqHelper_.connection_, id_, qos.prefetch_size, qos.prefetch_count, qos.global);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_basic_qos error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::basicCancel(const std::string &consumer_tag) {
if (!isChannelOpen())
return -1;
amqp_basic_cancel_t cancel = {};
cancel.consumer_tag = amqp_cstring_bytes(consumer_tag.c_str());
cancel.nowait = false;
amqp_basic_cancel_ok_t *r = amqp_basic_cancel(mqHelper_.connection_, id_, cancel.consumer_tag);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
if( amqpErrorCheck(res) < 0) {
return -1;
}
closeChannel();
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::basicRecover(const std::string &consumer) {
if (!isChannelOpen())
return -1;
amqp_basic_recover_t recover = {};
recover.requeue = true;
amqp_basic_recover_ok_t *r = amqp_basic_recover(mqHelper_.connection_, id_, recover.requeue);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_basic_recover error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitChannel::basicPublish(const std::string &exchange_name,
const std::string &routing_key, bool mandatory, bool immediate,
const std::string &message) {
if (!isChannelOpen())
return -1;
amqp_bytes_t message_bytes;
message_bytes.bytes = (void *)(message.c_str());
message_bytes.len = message.size();
//消息持久化的三要素之一:消息的投递模式为持久
amqp_basic_properties_t props;
props._flags = AMQP_BASIC_DELIVERY_MODE_FLAG;
props.delivery_mode = 2; /* persistent delivery mode */
int retCode = amqp_basic_publish(mqHelper_.connection_, id_,
amqp_cstring_bytes(exchange_name.c_str()),
amqp_cstring_bytes(routing_key.c_str()),
mandatory, immediate,
&props, message_bytes);
if (retCode < 0) {
LOG_API("amqp_basic_publish fail! ret:%d", retCode);
goto connection_err;
}
if (!is_publish_confirm_) {
return 0;
}
// Publish Confirm mode
// - basic.ack - our channel is in confirm mode, messsage was 'dealt with' by the broker
// - basic.return then basic.ack - the message wasn't delievered, but was dealt with
amqp_frame_t frame;
if (AMQP_STATUS_OK != amqp_simple_wait_frame(mqHelper_.connection_, &frame)) {
LOG_API("publish ok, but confirm may fail!");
goto connection_err;
}
if (frame.payload.method.id == AMQP_BASIC_ACK_METHOD) {
// Broker ACK message
return 0;
} else if(frame.payload.method.id == AMQP_BASIC_RETURN_METHOD) {
/* Message was published with mandatory = true and the message
* wasn't routed to a queue, so the message is returned */
// read the return message
{
amqp_message_t message_dummy;
amqp_rpc_reply_t res = amqp_read_message(mqHelper_.connection_, frame.channel, &message_dummy, 0);
if (AMQP_RESPONSE_NORMAL == res.reply_type)
amqp_destroy_message(&message_dummy);
}
LOG_API("basic.return called!");
goto connection_err;
} else {
LOG_API("Unexpeced method.id: %d", frame.payload.method.id);
goto connection_err;
}
connection_err:
closeConnection();
return -1;
}
int RabbitChannel::basicGet(RabbitMessage& rabbit_msg, const std::string &queue,
bool no_ack) {
if (!isChannelOpen())
return -1;
rabbit_msg.safe_clear();
#if 0
//
amqp_rpc_reply_t res = amqp_read_message(mqHelper_.connection_, id_, &rabbit_msg.envelope.message, 0);
#endif
size_t received_size = 0;
size_t body_size = 0;
amqp_basic_properties_t * properties = NULL;
amqp_basic_get_ok_t * get_ok = NULL;
amqp_basic_get_t get = {};
get.queue = amqp_cstring_bytes(queue.c_str());
get.no_ack = no_ack;
amqp_rpc_reply_t res = amqp_basic_get(mqHelper_.connection_, id_, get.queue, get.no_ack);
if( amqpErrorCheck(res) < 0 ||
res.reply_type == AMQP_RESPONSE_NONE ||
AMQP_BASIC_GET_EMPTY_METHOD == res.reply.id) {
goto error_out1;
}
if (res.reply.id != AMQP_BASIC_GET_OK_METHOD) {
LOG_API("unexpeced reply.id: %d", res.reply.id);
goto error_out1;
}
get_ok = (amqp_basic_get_ok_t *)res.reply.decoded;
if (!get_ok) {
goto error_out1;
}
rabbit_msg.safe_clear();
rabbit_msg.envelope.delivery_tag = get_ok->delivery_tag;
rabbit_msg.envelope.redelivered = get_ok->redelivered;
rabbit_msg.envelope.exchange = amqp_bytes_malloc_dup(get_ok->exchange);
rabbit_msg.envelope.routing_key = amqp_bytes_malloc_dup(get_ok->routing_key);
if (amqp_bytes_malloc_dup_failed(rabbit_msg.envelope.exchange) ||
amqp_bytes_malloc_dup_failed(rabbit_msg.envelope.routing_key)) {
LOG_API("malloc failed!");
goto error_out2;
}
amqp_frame_t frame;
// check first frame header
amqp_maybe_release_buffers(mqHelper_.connection_);
if(amqp_simple_wait_frame(mqHelper_.connection_, &frame) != AMQP_STATUS_OK){
LOG_API("wait for frame header error!");
goto error_out2;
}
if (frame.frame_type != AMQP_FRAME_HEADER){
LOG_API("expecting AMQP_FRAME_HEADER, but get: %d", frame.frame_type);
goto error_out2;
}
rabbit_msg.envelope.channel = frame.channel;
init_amqp_pool(&rabbit_msg.envelope.message.pool, 1); // init but not used
properties = reinterpret_cast<amqp_basic_properties_t *>(frame.payload.properties.decoded);
(void)properties;
received_size = 0;
body_size = static_cast<size_t>(frame.payload.properties.body_size);
if (0 == frame.payload.properties.body_size) {
rabbit_msg.envelope.message.body = amqp_empty_bytes;
} else {
rabbit_msg.envelope.message.body = amqp_bytes_malloc(body_size); // already set body.len
if (!rabbit_msg.envelope.message.body.bytes) {
LOG_API("malloc for message body failed!");
goto error_out3;
}
}
while (received_size < body_size) {
if(amqp_simple_wait_frame(mqHelper_.connection_, &frame) < 0){
LOG_API("wait for frame header error!");
goto error_out3;
}
if (frame.frame_type != AMQP_FRAME_BODY) {
LOG_API("expecting AMQP_FRAME_BODY, but get: %d", frame.frame_type);
goto error_out3;
}
// copy and store message
void *body_ptr = reinterpret_cast<char *>(rabbit_msg.envelope.message.body.bytes) + received_size;
memcpy(body_ptr, frame.payload.body_fragment.bytes, frame.payload.body_fragment.len);
received_size += frame.payload.body_fragment.len;
}
rabbit_msg.touch();
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
error_out3:
empty_amqp_pool(&rabbit_msg.envelope.message.pool);
error_out2:
amqp_bytes_free(rabbit_msg.envelope.message.body); // safe
amqp_bytes_free(rabbit_msg.envelope.routing_key);
amqp_bytes_free(rabbit_msg.envelope.exchange);
error_out1:
return -1;
}
int RabbitChannel::basicConsume(const std::string &queue,
const std::string &consumer_tag,
bool no_local, bool no_ack, bool exclusive) {
if (!isChannelOpen())
return -1;
amqp_basic_consume_t consume = {};
consume.queue = amqp_cstring_bytes(queue.c_str());
if (consumer_tag.empty() || consumer_tag == "*") {
consume.consumer_tag = amqp_empty_bytes;
} else {
consume.consumer_tag = amqp_cstring_bytes(consumer_tag.c_str());
}
consume.no_local = no_local;
consume.no_ack = no_ack;
consume.exclusive = exclusive;
consume.nowait = false;
amqp_basic_consume_ok_t *r = amqp_basic_consume(mqHelper_.connection_, id_, consume.queue, consume.consumer_tag,
consume.no_local, consume.no_ack, consume.exclusive, amqp_empty_table);
(void)r;
amqp_rpc_reply_t res = amqp_get_rpc_reply(mqHelper_.connection_);
int ret_code = amqpErrorCheck(res);
if( ret_code < 0 ) {
LOG_API("rabbitmq amqp_basic_consume error with: %d", ret_code);
return -1;
}
amqp_maybe_release_buffers_on_channel(mqHelper_.connection_, id_);
return 0;
}
int RabbitMQHelper::basicConsumeMessage(RabbitMessage& rabbit_msg,
struct timeval *timeout, int flags) {
int retCode = 0;
amqp_rpc_reply_t ret;
amqp_frame_t frame;
rabbit_msg.safe_clear();
ret = amqp_consume_message(connection_, &rabbit_msg.envelope, timeout/*blocking*/, 0);
// un-normal condition
if (AMQP_RESPONSE_NORMAL != ret.reply_type) {
if (AMQP_RESPONSE_LIBRARY_EXCEPTION == ret.reply_type && AMQP_STATUS_TIMEOUT == ret.library_error) {
return WAIT_MSG_TIMEOUT;
}
else if (AMQP_RESPONSE_LIBRARY_EXCEPTION == ret.reply_type && AMQP_STATUS_UNEXPECTED_STATE == ret.library_error) {
if (AMQP_STATUS_OK != amqp_simple_wait_frame(connection_, &frame)) {
return -1;
}
if (AMQP_FRAME_METHOD == frame.frame_type) {
switch (frame.payload.method.id) {
case AMQP_BASIC_ACK_METHOD:
/* if we've turned publisher confirms on, and we've published a message
* here is a message being confirmed
*/
retCode = 0;
break;
case AMQP_BASIC_RETURN_METHOD:
/* if a published message couldn't be routed and the mandatory flag was set
* this is what would be returned. The message then needs to be read.
*/
{
amqp_message_t message;
ret = amqp_read_message(connection_, frame.channel, &message, 0);
if (AMQP_RESPONSE_NORMAL != ret.reply_type) {
retCode = -1;
break;
}
amqp_destroy_message(&message);
}
break;
case AMQP_CHANNEL_CLOSE_METHOD:
/* a channel.close method happens when a channel exception occurs, this
* can happen by publishing to an exchange that doesn't exist for example
*
* In this case you would need to open another channel redeclare any queues
* that were declared auto-delete, and restart any consumers that were attached
* to the previous channel
*/
LOG_API("Close other channel: %d", frame.channel);
closeChannel(frame.channel);
return -1;
case AMQP_CONNECTION_CLOSE_METHOD:
/* a connection.close method happens when a connection exception occurs,
* this can happen by trying to use a channel that isn't open for example.
*
* In this case the whole connection must be restarted.
*/
LOG_API("Close connection");
closeConnection();
return -1;
default:
LOG_API("An unexpected method was received %u\n", frame.payload.method.id);
return -1;
} // switch
} // AMQP_FRAME_METHOD
}
} else { //AMQP_RESPONSE_NORMAL
rabbit_msg.touch();
}
amqp_maybe_release_buffers(connection_);
return 0;
}
// class RabbitMQHelper
bool RabbitMQHelper::doConnect() {
if (connect_uris_.empty() || frame_max_ <= 0) {
LOG_API("invalid argument!");
return false;
}
// when re-connect, free all channel
channel_ids_.clear();
channels_.clear();
amqp_connection_info info;
amqp_default_connection_info(&info);
std::vector<std::string>::const_iterator it;
for (it = connect_uris_.cbegin(); it != connect_uris_.cend(); ++it){
char uri[2048] = {0, };
strncpy(uri, it->c_str(), sizeof(uri));
if (amqp_parse_url(uri, &info) != 0) {
LOG_API("prase connect_uri failed: %s", uri);
continue;
}
connection_ = amqp_new_connection();
if (!connection_) {
LOG_API("rabbitmq new connect error!");
continue;
}
amqp_socket_t *socket = amqp_tcp_socket_new(connection_);
int sock = amqp_socket_open(socket, info.host, info.port);
if (sock < 0) {
LOG_API("rabbitmq socket open error!");
amqp_destroy_connection(connection_);
continue;
}