1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#pragma once
#include "clickhouse_config.h"
#if USE_LIBPQXX
#include "ConnectionHolder.h"
#include <mutex>
#include <Poco/Util/AbstractConfiguration.h>
#include <Storages/ExternalDataSourceConfiguration.h>
#include <Storages/StoragePostgreSQL.h>
static constexpr inline auto POSTGRESQL_POOL_DEFAULT_SIZE = 16;
static constexpr inline auto POSTGRESQL_POOL_WAIT_TIMEOUT = 5000;
static constexpr inline auto POSTGRESQL_POOL_WITH_FAILOVER_DEFAULT_MAX_TRIES = 5;
namespace postgres
{
class PoolWithFailover
{
using RemoteDescription = std::vector<std::pair<String, uint16_t>>;
public:
PoolWithFailover(
const DB::ExternalDataSourcesConfigurationByPriority & configurations_by_priority,
size_t pool_size,
size_t pool_wait_timeout,
size_t max_tries_,
bool auto_close_connection_);
explicit PoolWithFailover(
const DB::StoragePostgreSQL::Configuration & configuration,
size_t pool_size,
size_t pool_wait_timeout,
size_t max_tries_,
bool auto_close_connection_);
PoolWithFailover(const PoolWithFailover & other) = delete;
ConnectionHolderPtr get();
private:
struct PoolHolder
{
ConnectionInfo connection_info;
PoolPtr pool;
PoolHolder(const ConnectionInfo & connection_info_, size_t pool_size)
: connection_info(connection_info_), pool(std::make_shared<Pool>(pool_size)) {}
};
/// Highest priority is 0, the bigger the number in map, the less the priority
using Replicas = std::vector<PoolHolder>;
using ReplicasWithPriority = std::map<size_t, Replicas>;
ReplicasWithPriority replicas_with_priority;
size_t pool_wait_timeout;
size_t max_tries;
bool auto_close_connection;
std::mutex mutex;
Poco::Logger * log = &Poco::Logger::get("PostgreSQLConnectionPool");
};
using PoolWithFailoverPtr = std::shared_ptr<PoolWithFailover>;
}
#endif
|
