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- /**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
- #ifndef _JMEM_HASHMAP_COMPACT_H
- #define _JMEM_HASHMAP_COMPACT_H
- #include "util/tc_hashmap_compact.h"
- #include "util/tc_autoptr.h"
- #include "jmem/jmem_policy.h"
- #include "tup/Tars.h"
- namespace tars
- {
- /************************************************************************
- 重要说明:
- 1 使用方式与TarsHashmap完全一致;
- 2 与JHashmap相比, 在64位os下面,每个chunk能够节约大概30个字节;
- 3 效率比JHashmap稍慢一点,可以忽略不计;
- 4 每个chunk的大小最大只能是64k(与实际数据块大小无关,实际数据块可以多个chunk拼接在一起)
- ************************************************************************/
- /************************************************************************
- 基本说明如下:
- 基于Tars协议的内存hashmap
- 编解码出错则抛出TarsDecodeException和TarsEncodeException
- 可以对锁策略和存储策略进行组合, 例如:
- 基于信号量锁, 文件存储的hashmap:
- TarsHashMap<Test::QueueElement, SemLockPolicy, FileStorePolicy>
- 基于信号量锁, 共享内存存储的hashmap
- TarsHashMap<Test::QueueElement, SemLockPolicy, ShmStorePolicy>
- 基于线程锁, 内存存储的hashmap
- TarsHashMap<Test::QueueElement, ThreadLockPolicy, MemStorePolicy>
-
- 使用上, 不同的组合, 初始化函数不完全一样
- 初始化函数有:
- SemLockPolicy::initLock(key_t)
- ShmStorePolicy::initStore(key_t, size_t)
- FileStorePolicy::initStore(const char *file, size_t)
- 等, 具体参见jmem_policy.h
-
- ***********************************************************************
- 基本特性说明:
- > 内存数据的map, 根据最后Get时间的顺序淘汰数据;
- > 支持缓写/dump到文件/在线备份;
- > 支持不同大小内存块的配置, 提供内存的使用率;
- > 支持回收到指定空闲比率的空间;
- > 支持仅设置Key的操作, 即数据无value, 只有Key, 类似与stl::set;
- > 支持自定义hash算法;
- > hash数可以根据内存块比率设置, 并优化有素数, 提高hash的散列性;
- > 支持几种方式的遍历, 通常遍历时需要对map加锁;
- > 对于hash方式的遍历, 遍历时可以不需要对map加锁, 推荐使用;
- > 支持自定义操作对象设置, 可以非常快速实现相关的接口;
- > 支持自动编解码, Key和Value的结构都通过tars2cpp生成;
- > tars协议支持自动扩展字段, 因此该hashmap支持自动扩展字段(Key和Value都必须是通过tars编码的);
- > map支持只读模式, 只读模式下set/erase/del等修改数据的操作不能使用, get/回写/在线备份正常使用
- > 支持自动淘汰, set时, 内存满则自动淘汰, 在非自动淘汰时, 内存满直接返回RT_READONLY
- > 对于mmap文件, 支持自动扩展文件, 即内存不够了, 可以自动扩展文件大小(注意hash的数量不变, 因此开始就需要考虑hash的数量), 而且不能跨JHashmap对象(即两个hashmap对象访问同一块文件,通知一个hashmap扩展以后,另外一个对象并不知道扩展了)
- ***********************************************************************
- hashmap链说明:
- hashmap链一共包括了如下几种链表:
- > Set时间链: 任何Set操作都会修改该链表, Set后数据被设置为脏数据, 且移动到Set链表头部;
- > Get时间链: 任何Get操作都会修改该链表, 除非链表只读, 注意Set链同时也会修改Get链
- > Dirty时间链: dirty链是Set链的一部分, 用于回写数据用
- > Backup链:备份链是Get链的一部分, 当备份数据时, 顺着Get链从尾部到头部开始备份;
-
- ***********************************************************************
- 相关操作说明:
- > 可以设置map只读, 则所有写操作返回RT_READONLY, 此时Get操作不修改链表
- > 可以设置知否自动淘汰, 默认是自动淘汰的.如果不自动淘汰,则set时,无内存空间返回:RT_NO_MEMORY
- > 可以更改hash的算法, 调用setHashFunctor即可
- > 可以将某条数据设置为干净, 此时移出到Dirty链表指Dirty尾部的下一个元素;
- > 可以将某条数据设置为脏, 此时会移动到Set链表头部;
- > 每个数据都有一个上次回写时间(SyncTime), 如果启动回写操作, 则在一定时间内会回写;
- > 可以dump到文件或者从文件中load, 这个时候会对map加锁
- > 可以调用erase批量淘汰数据直到内存空闲率到一定比例
- > 可以调用sync进行数据回写, 保证一定时间内没有回写的数据会回写, map回写时间通过setSyncTime设置, 默认10分钟
- > 可以setToDoFunctor设置操作类, 以下是操作触发的情况:
-
- ***********************************************************************
-
- ToDoFunctor的函数说明:
- > 通常继承ToDoFunctor, 实现相关函数就可以了, 可以实现以下功能:Get数据, 淘汰数据, 删除数据, 回写数据, 备份数据
- > ToDoFunctor::erase, 当调用map.erase时, 该函数会被调用
- > ToDoFunctor::del, 当调用map.del时, 该函数会被调用, 注意删除时数据可能都不在cache中;
- > ToDoFunctor::sync, 当调用map.sync时, 会触发每条需要回写的数据该函数都被调用一次, 在该函数中处理回写请求;
- > ToDoFunctor::backup, 当调用map.backup时, 会触发需要备份的数据该函数会被调用一次, 在该函数中处理备份请求;
- > ToDoFunctor::get, 当调用map.get时, 如果map中无数据, 则该函数被调用, 该函数从db中获取数据, 并返回RT_OK, 如果db无数据则返回RT_NO_DATA;
- > ToDoFunctor所有接口被调用时, 都不会对map加锁, 因此可以操作map
- ***********************************************************************
- map的重要函数说明:
- > set, 设置数据到map中, 会更新set链表
- 如果满了, 且可以自动淘汰, 则根据Get链淘汰数据, 此时ToDoFunctor的sync会被调用
- 如果满了, 且可以不能自动淘汰, 则返回RT_NO_MEMORY
- > get, 从map获取数据, 如果有数据, 则直接从map获取数据并返回RT_OK;
- 如果没有数据, 则调用ToDoFunctor::get函数, 此时get函数需要返回RT_OK, 同时会设置到map中, 并返回数据;
- 如果没有数据, 则ToDoFunctor::get函数也无数据, 则需要返回RT_NO_DATA, 此时只会把Key设置到map中, 并返回RT_ONLY_KEY;
- 在上面情况下, 如果再有get请求, 则不再调用ToDoFunctor::get, 直接返回RT_ONLY_KEY;
- > del, 删除数据, 无论cache是否有数据, ToDoFunctor::del都会被调用;
- 如果只有Key, 则该数据也会被删除;
- > erase, 淘汰数据, 只有cache存在数据, ToDoFunctor::erase才会被调用
- 如果只有Key, 则该数据也会被淘汰, 但是ToDoFunctor::erase不会被调用;
- > erase(int radio), 批量淘汰数据, 直到空闲块比率到达radio;
- ToDoFunctor::erase会被调用;
- 只有Key的记录也会被淘汰, 但是ToDoFunctor::erase不会被调用;
- > sync: 缓写数据, 超时没有回写且是脏数据需要回写, 回写完毕后, 数据会自动设置为干净数据;
- 可以多个线程或进程同时缓写;
- ToDoFunctor::sync会被调用;
- 只有Key的记录, ToDoFunctor::sync不会被调用;
- > backup: 备份数据, 顺着顺着Get链从尾部到头部开始备份;
- ToDoFunctor::backup会被调用;
- 只有Key的记录, ToDoFunctor::backup不会被调用;
- 由于备份游标只有一个, 因此多个进程同时备份的时候数据可能会每个进程有一部分
- 如果备份程序备份到一半down了, 则下次启动备份时会接着上次的备份进行, 除非将backup(true)调用备份
- ***********************************************************************
- 返回值说明:
- > 注意函数所有int的返回值, 如无特别说明, 请参见TC_HashMapCompact::RT_
-
- ***********************************************************************
- 遍历说明:
- > 可以用lock_iterator对map进行以下几种遍历, 在遍历过程中其实对map加锁处理了
- > end(): 迭代器尾部
- > begin(): 按照block区块遍历
- > rbegin():按照block区块逆序遍历
- > beginSetTime(): 按照Set时间顺序遍历
- > rbeginSetTime(): 按照Set时间顺序遍历
- > beginGetTime(): 按照Get时间顺序遍历
- > rbeginGetTime(): 按照Get时间逆序遍历
- > beginDirty(): 按时间逆序遍历脏数据链(如果setClean, 则也可能在脏链表上)
- > 其实回写数据链是脏数据量的子集
- > 注意:lock_iterator一旦获取, 就对map加锁了, 直到lock_iterator析够为止
- >
- > 可以用hash_iterator对map进行遍历, 遍历过程中对map没有加锁, 推荐使用
- > hashBegin(): 获取hash遍历迭代器
- > hashEnd(): hash遍历尾部迭代器
- > 注意:hash_iterator对应的其实是一个hash桶链, 每次获取数据其实会获取桶链上面的所有数据
- */
- template<typename K,
- typename V,
- typename LockPolicy,
- template<class, class> class StorePolicy>
- class TarsHashMapCompact : public StorePolicy<TC_HashMapCompact, LockPolicy>
- {
- public:
- /**
- * 定义数据操作基类
- * 获取,遍历,删除,淘汰时都可以使用该操作类
- */
- class ToDoFunctor
- {
- public:
- /**
- * 数据记录
- */
- struct DataRecord
- {
- K _key;
- V _value;
- bool _dirty;
- uint32_t _iSyncTime;
- uint32_t _expiret;
- uint8_t _ver;
- DataRecord() : _dirty(true), _iSyncTime(0)
- {
- }
- };
- /**
- * 析够
- */
- virtual ~ToDoFunctor(){};
- /**
- * 淘汰数据
- * @param stDataRecord: 被淘汰的数据
- */
- virtual void erase(const DataRecord &stDataRecord){};
- /**
- * 删除数据
- * @param bExists: 是否存在数据
- * @param stDataRecord: 数据, bExists==true时有效, 否则只有key有效
- */
- virtual void del(bool bExists, const DataRecord &stDataRecord){};
- /**
- * 回写数据
- * @param stDataRecord: 数据
- */
- virtual void sync(const DataRecord &stDataRecord){};
- /**
- * 备份数据
- * @param stDataRecord: 数据
- */
- virtual void backup(const DataRecord &stDataRecord){};
- /**
- * 获取数据, 默认返回RT_NO_GET
- * stDataRecord中_key有效, 其他数据需要返回
- * @param stDataRecord: 需要获取的数据
- *
- * @return int, 获取到数据, 返回:TC_HashMapCompact::RT_OK
- * 没有数据,返回:TC_HashMapCompact::RT_NO_DATA,
- * 系统默认GET,返回:TC_HashMapCompact::RT_NO_GET
- * 其他,则返回:TC_HashMapCompact::RT_LOAD_DATA_ERR
- */
- virtual int get(DataRecord &stDataRecord)
- {
- return TC_HashMapCompact::RT_NO_GET;
- }
- };
- typedef typename ToDoFunctor::DataRecord DataRecord;
- ///////////////////////////////////////////////////////////////////
- /**
- * 自动锁, 用于迭代器
- */
- class JhmAutoLock : public TC_HandleBase
- {
- public:
- /**
- * 构造
- * @param mutex
- */
- JhmAutoLock(typename LockPolicy::Mutex &mutex) : _lock(mutex)
- {
- }
- protected:
- //不实现
- JhmAutoLock(const JhmAutoLock &al);
- JhmAutoLock &operator=(const JhmAutoLock &al);
- protected:
- /**
- * 锁
- */
- TC_LockT<typename LockPolicy::Mutex> _lock;
- };
- typedef TC_AutoPtr<JhmAutoLock> JhmAutoLockPtr;
- ///////////////////////////////////////////////////////////////////
- /**
- * 数据项
- */
- class JhmLockItem
- {
- public:
- /**
- * 构造函数
- * @param item
- */
- JhmLockItem(const TC_HashMapCompact::HashMapLockItem &item)
- : _item(item)
- {
- }
- /**
- * 拷贝构造
- * @param it
- */
- JhmLockItem(const JhmLockItem &item)
- : _item(item._item)
- {
- }
- /**
- * 复制
- * @param it
- *
- * @return JhmLockItem&
- */
- JhmLockItem& operator=(const JhmLockItem &item)
- {
- if(this != &item)
- {
- _item = item._item;
- }
- return (*this);
- }
- /**
- *
- * @param item
- *
- * @return bool
- */
- bool operator==(const JhmLockItem& item)
- {
- return (_item == item._item);
- }
- /**
- *
- * @param item
- *
- * @return bool
- */
- bool operator!=(const JhmLockItem& item)
- {
- return !((*this) == item);
- }
- /**
- * 是否是脏数据
- *
- * @return bool
- */
- bool isDirty() { return _item.isDirty(); }
- /**
- * 是否只有Key
- *
- * @return bool
- */
- bool isOnlyKey() { return _item.isOnlyKey(); }
- /**
- * 最后回写时间
- *
- * @return uint32_t
- */
- uint32_t getSyncTime() { return _item.getSyncTime(); }
- /**
- * 获取值
- * @return int
- * TC_HashMapCompact::RT_OK:数据获取OK
- * 其他值, 异常
- */
- int get(K& k)
- {
- string sk;
- int ret = _item.get(sk);
- if(ret != TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(sk.c_str(), sk.length());
- k.readFrom(is);
- return ret;
- }
- /**
- * 获取值
- * @return int
- * TC_HashMapCompact::RT_OK:数据获取OK
- * TC_HashMapCompact::RT_ONLY_KEY: key有效, v无效为空
- * 其他值, 异常
- */
- int get(K& k, V& v)
- {
- string sk;
- string sv;
- int ret = _item.get(sk, sv);
- if(ret != TC_HashMapCompact::RT_OK && ret != TC_HashMapCompact::RT_ONLY_KEY)
- {
- return ret;
- }
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(sk.c_str(), sk.length());
- k.readFrom(is);
- if(ret != TC_HashMapCompact::RT_ONLY_KEY)
- {
- is.setBuffer(sv.c_str(), sv.length());
- v.readFrom(is);
- }
- return ret;
- }
- protected:
- TC_HashMapCompact::HashMapLockItem _item;
- };
- ///////////////////////////////////////////////////////////////////
- /**
- * 迭代器
- */
- struct JhmLockIterator
- {
- public:
- /**
- * 构造
- * @param it
- * @param lock
- */
- JhmLockIterator(const TC_HashMapCompact::lock_iterator it, const JhmAutoLockPtr &lock)
- : _it(it), _item(it._iItem), _lock(lock)
- {
- }
- /**
- * 拷贝构造
- * @param it
- */
- JhmLockIterator(const JhmLockIterator &it)
- : _it(it._it), _item(it._item), _lock(it._lock)
- {
- }
- /**
- * 复制
- * @param it
- *
- * @return JhmLockIterator&
- */
- JhmLockIterator& operator=(const JhmLockIterator &it)
- {
- if(this != &it)
- {
- _it = it._it;
- _item = it._item;
- _lock = it._lock;
- }
- return (*this);
- }
- /**
- *
- * @param it
- *
- * @return bool
- */
- bool operator==(const JhmLockIterator& it)
- {
- return (_it == it._it && _item == it._item);
- }
- /**
- *
- * @param mv
- *
- * @return bool
- */
- bool operator!=(const JhmLockIterator& it)
- {
- return !((*this) == it);
- }
- /**
- * 前置++
- *
- * @return JhmLockIterator&
- */
- JhmLockIterator& operator++()
- {
- ++_it;
- _item = JhmLockItem(_it._iItem);
- return (*this);
- }
- /**
- * 后置++
- *
- * @return JhmLockIterator&
- */
- JhmLockIterator operator++(int)
- {
- JhmLockIterator jit(_it, _lock);
- ++_it;
- _item = JhmLockItem(_it._iItem);
- return jit;
- }
- /**
- * 获取数据项
- *
- * @return JhmLockItem&
- */
- JhmLockItem& operator*() { return _item; }
- /**
- * 获取数据项
- *
- * @return JhmLockItem*
- */
- JhmLockItem* operator->() { return &_item; }
- protected:
- /**
- * 迭代器
- */
- TC_HashMapCompact::lock_iterator _it;
- /**
- * 数据项
- */
- JhmLockItem _item;
- /**
- * 锁
- */
- JhmAutoLockPtr _lock;
- };
- typedef JhmLockIterator lock_iterator ;
- ///////////////////////////////////////////////////////////////////
- /**
- * 锁, 用于非锁迭代器
- *
- */
- class JhmLock : public TC_HandleBase
- {
- public:
- /**
- * 构造
- * @param mutex
- */
- JhmLock(typename LockPolicy::Mutex &mutex) : _mutex(mutex)
- {
- }
- /**
- * 获取锁
- *
- * @return typename LockPolicy::Mutex
- */
- typename LockPolicy::Mutex& mutex()
- {
- return _mutex;
- }
- protected:
- //不实现
- JhmLock(const JhmLock &al);
- JhmLock &operator=(const JhmLock &al);
- protected:
- /**
- * 锁
- */
- typename LockPolicy::Mutex &_mutex;
- };
- typedef TC_AutoPtr<JhmLock> JhmLockPtr;
- ///////////////////////////////////////////////////////////////////
- /**
- * 数据项
- */
- class JhmItem
- {
- public:
- /**
- * 构造函数
- * @param item
- */
- JhmItem(const TC_HashMapCompact::HashMapItem &item, const JhmLockPtr &lock)
- : _item(item), _lock(lock)
- {
- }
- /**
- * 拷贝构造
- * @param it
- */
- JhmItem(const JhmItem &item)
- : _item(item._item), _lock(item._lock)
- {
- }
- /**
- * 复制
- * @param it
- *
- * @return JhmItem&
- */
- JhmItem& operator=(const JhmItem &item)
- {
- if(this != &item)
- {
- _item = item._item;
- _lock = item._lock;
- }
- return (*this);
- }
- /**
- *
- * @param item
- *
- * @return bool
- */
- bool operator==(const JhmItem& item)
- {
- return (_item == item._item);
- }
- /**
- *
- * @param item
- *
- * @return bool
- */
- bool operator!=(const JhmItem& item)
- {
- return !((*this) == item);
- }
- /**
- * 获取当前hash桶的所有数量, 注意只获取有key/value的数据
- * 对于只有key的数据, 不获取
- * 如果协议解码有问题也不获取
- * @param
- */
- void get(vector<pair<K, V> > &v)
- {
- vector<TC_HashMapCompact::BlockData> vtData;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(_lock->mutex());
- _item.get(vtData);
- }
- for(size_t i = 0; i < vtData.size(); i++)
- {
- pair<K, V> pk;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(vtData[i]._key.c_str(), vtData[i]._key.length());
- pk.first.readFrom(is);
- is.setBuffer(vtData[i]._value.c_str(), vtData[i]._value.length());
- pk.second.readFrom(is);
- v.push_back(pk);
- }
- catch(exception &ex)
- {
- }
- }
- }
- /**
- * 获取当前hash桶的所有过期数据, 注意只获取有key/value的数据
- * 对于只有key的数据, 不获取
- * 如果协议解码有问题也不获取
- * @param
- */
- void getExpire(uint32_t t, vector<pair<K, V> > &v)
- {
- vector<TC_HashMapCompact::BlockData> vtData;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(_lock->mutex());
- _item.getExpire(t, vtData);
- }
- for(size_t i = 0; i < vtData.size(); i++)
- {
- pair<K, V> pk;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(vtData[i]._key.c_str(), vtData[i]._key.length());
- pk.first.readFrom(is);
- is.setBuffer(vtData[i]._value.c_str(), vtData[i]._value.length());
- pk.second.readFrom(is);
- v.push_back(pk);
- }
- catch(exception &ex)
- {
- }
- }
- }
- /**
- * 设置当前桶下的所有数据为脏数据
- *
- * @param
- *
- * @return int
- */
- int setDirty()
- {
- {
- TC_LockT<typename LockPolicy::Mutex> lock(_lock->mutex());
- return _item.setDirty();
- }
- }
- protected:
- TC_HashMapCompact::HashMapItem _item;
- JhmLockPtr _lock;
- };
- ///////////////////////////////////////////////////////////////////
- /**
- * 迭代器
- */
- struct JhmIterator
- {
- public:
- /**
- * 构造
- * @param it
- * @param lock
- */
- JhmIterator(const TC_HashMapCompact::hash_iterator &it, const JhmLockPtr &lock)
- : _it(it), _item(it._iItem, lock), _lock(lock)
- {
- }
- /**
- * 拷贝构造
- * @param it
- */
- JhmIterator(const JhmIterator &it)
- : _it(it._it), _item(it._item), _lock(it._lock)
- {
- }
- /**
- * 复制
- * @param it
- *
- * @return JhmIterator&
- */
- JhmIterator& operator=(const JhmIterator &it)
- {
- if(this != &it)
- {
- _it = it._it;
- _item = it._item;
- }
- return (*this);
- }
- /**
- *
- * @param it
- *
- * @return bool
- */
- bool operator==(const JhmIterator& it)
- {
- return (_it == it._it && _item == it._item);
- }
- /**
- *
- * @param mv
- *
- * @return bool
- */
- bool operator!=(const JhmIterator& it)
- {
- return !((*this) == it);
- }
- /**
- * 前置++
- *
- * @return JhmIterator&
- */
- JhmIterator& operator++()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(_lock->mutex());
- ++_it;
- _item = JhmItem(_it._iItem, _lock);
- return (*this);
- }
- /**
- * 后置++
- *
- * @return JhmIterator&
- */
- JhmIterator operator++(int)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(_lock->mutex());
- JhmIterator jit(_it, _lock);
- ++_it;
- _item = JhmItem(_it._iItem, _lock);
- return jit;
- }
- /**
- * 获取数据项
- *
- * @return JhmItem&
- */
- JhmItem& operator*() { return _item; }
- /**
- * 获取数据项
- *
- * @return JhmItem*
- */
- JhmItem* operator->() { return &_item; }
- protected:
- /**
- * 迭代器
- */
- TC_HashMapCompact::hash_iterator _it;
- /**
- * 数据项
- */
- JhmItem _item;
- /**
- * 锁
- */
- JhmLockPtr _lock;
- };
- typedef JhmIterator hash_iterator ;
- ////////////////////////////////////////////////////////////////////////////
- //
- /**
- * 构造函数
- */
- TarsHashMapCompact()
- {
- _todo_of = NULL;
- }
- /**
- * 初始化数据块平均大小
- * 表示内存分配的时候,会分配n个最小块, n个(最小快*增长因子), n个(最小快*增长因子*增长因子)..., 直到n个最大块
- * n是hashmap自己计算出来的
- * 这种分配策略通常是你数据快记录变长比较多的使用, 便于节约内存,如果数据记录基本不是变长的, 那最小块=最大快,增长因子=1就可以了
- * @param iMinDataSize: 最小数据块大小
- * @param iMaxDataSize: 最大数据块大小
- * @param fFactor: 增长因子 >= 1.0
- */
- void initDataBlockSize(size_t iMinDataSize, size_t iMaxDataSize, float fFactor)
- {
- this->_t.initDataBlockSize(iMinDataSize, iMaxDataSize, fFactor);
- }
- /**
- * 设置hash比率(设置chunk数据块/hash项比值, 默认是2)
- * 有需要更改必须在create之前调用
- *
- * @param fRadio
- */
- void initHashRadio(float fRadio) { this->_t.initHashRadio(fRadio);}
-
- /**
- * 设置hash方式
- * @param hash_of
- */
- void setHashFunctor(TC_HashMapCompact::hash_functor hashf)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setHashFunctor(hashf);
- }
- /**
- * 获取hash方式
- *
- * @return TC_HashMapCompact::hash_functor&
- */
- TC_HashMapCompact::hash_functor &getHashFunctor() { return this->_t.getHashFunctor(); }
- /**
- * 设置淘汰操作类
- * @param erase_of
- */
- void setToDoFunctor(ToDoFunctor *todo_of) { this->_todo_of = todo_of; }
- /**
- * 获取每种大小内存块的头部信息
- *
- * @return vector<TC_MemChunk::tagChunkHead>: 不同大小内存块头部信息
- */
- vector<TC_MemChunk::tagChunkHead> getBlockDetail()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getBlockDetail();
- }
- /**
- * 所有block中chunk的个数
- *
- * @return size_t
- */
- size_t allBlockChunkCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.allBlockChunkCount();
- }
- /**
- * 每种block中chunk的个数(不同大小内存块的个数相同)
- *
- * @return size_t
- */
- vector<size_t> singleBlockChunkCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.singleBlockChunkCount();
- }
- /**
- * 获取hash桶的个数
- *
- * @return size_t
- */
- size_t getHashCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getHashCount();
- }
- /**
- * 元素的个数
- *
- * @return size_t
- */
- size_t size()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.size();
- }
- /**
- * 脏数据元素个数
- *
- * @return size_t
- */
- size_t dirtyCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.dirtyCount();
- }
- /**
- * Only数据元素个数
- *
- * @return size_t
- */
- size_t onlyKeyCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.onlyKeyCount();
- }
- /**
- * 设置每次淘汰数量
- * @param n
- */
- void setEraseCount(size_t n)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setEraseCount(n);
- }
- /**
- * 获取每次淘汰数量
- *
- * @return size_t
- */
- size_t getEraseCount()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getEraseCount();
- }
- /**
- * 设置只读
- * @param bReadOnly
- */
- void setReadOnly(bool bReadOnly)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setReadOnly(bReadOnly);
- }
- /**
- * 是否只读
- *
- * @return bool
- */
- bool isReadOnly()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.isReadOnly();
- }
- /**
- * 设置是否可以自动淘汰
- * @param bAutoErase
- */
- void setAutoErase(bool bAutoErase)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setAutoErase(bAutoErase);
- }
- /**
- * 是否可以自动淘汰
- *
- * @return bool
- */
- bool isAutoErase()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.isAutoErase();
- }
- /**
- * 设置淘汰方式
- * TC_HashMapCompact::ERASEBYGET
- * TC_HashMapCompact::ERASEBYSET
- * @param cEraseMode
- */
- void setEraseMode(char cEraseMode)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setEraseMode(cEraseMode);
- }
- /**
- * 获取淘汰方式
- *
- * @return bool
- */
- char getEraseMode()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getEraseMode();
- }
- /**
- * 头部信息
- *
- * @return TC_HashMapCompact::tagMapHead
- */
- TC_HashMapCompact::tagMapHead& getMapHead()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getMapHead();
- }
- /**
- * 设置回写时间(秒)
- * @param iSyncTime
- */
- void setSyncTime(uint32_t iSyncTime)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.setSyncTime(iSyncTime);
- }
- /**
- * 获取回写时间
- *
- * @return uint32_t
- */
- uint32_t getSyncTime()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.getSyncTime();
- }
- /**
- * dump到文件
- * @param sFile
- * @param bDoClear: 是否清空
- * @return int
- * TC_HashMapCompact::RT_DUMP_FILE_ERR: dump到文件出错
- * TC_HashMapCompact::RT_OK: dump到文件成功
- */
- int dump2file(const string &sFile, bool bDoClear = false)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- int ret = this->_t.dump2file(sFile);
- if(ret != TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(bDoClear)
- this->_t.clear();
- return ret;
- }
- /**
- * 从文件load
- * @param sFile
- *
- * @return int
- * TC_HashMapCompact::RT_LOAL_FILE_ERR: load出错
- * TC_HashMapCompact::RT_VERSION_MISMATCH_ERR: 版本不一致
- * TC_HashMapCompact::RT_OK: load成功
- */
- int load5file(const string &sFile)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.load5file(sFile);
- }
- /**
- * 清空hash map
- * 所有map中的数据都被清空
- */
- void clear()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.clear();
- }
- /**
- * 检查数据状态
- * @param k
- *
- * @return int
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_DIRTY_DATA: 是脏数据
- * TC_HashMapCompact::RT_OK: 是干净数据
- * 其他返回值: 错误
- */
- int checkDirty(const K &k)
- {
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.checkDirty(sk);
- }
- /**
- * 设置为干净数据i, 修改SET/GET时间链, 会导致数据不回写
- * @param k
- *
- * @return int
- * TC_HashMapCompact::RT_READONLY: 只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_OK: 设置成功
- * 其他返回值: 错误
- */
- int setClean(const K& k)
- {
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.setClean(sk);
- }
- /**
- * 设置为脏数据, 修改SET/GET时间链, 会导致数据回写
- * @param k
- * @return int
- * TC_HashMapCompact::RT_READONLY: 只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_OK: 设置脏数据成功
- * 其他返回值: 错误
- */
- int setDirty(const K& k)
- {
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return this->_t.setDirty(sk);
- }
- /**
- * 获取数据, 修改GET时间链
- * (如果没设置自定义Get函数,没有数据时返回:RT_NO_DATA)
- * @param k
- * @param v
- * @param iSyncTime:数据上次回写的时间, 没有缓写则为0
- *
- * @return int:
- * TC_HashMapCompact::RT_NO_DATA: 没有数据
- * TC_HashMapCompact::RT_READONLY: 只读模式
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_OK:获取数据成功
- * TC_HashMapCompact::RT_LOAD_DATA_ERR: load数据失败
- * 其他返回值: 错误
- */
- int get(const K& k, V &v, uint32_t &iSyncTime, uint32_t& iExpireTime, uint8_t& iVersion)
- {
- iSyncTime = 0;
- iExpireTime = 0;
- iVersion = 1;
- int ret = TC_HashMapCompact::RT_OK;
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- string sv;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.get(sk, sv, iSyncTime, iExpireTime, iVersion);
- }
- //读取到数据了, 解包
- if(ret == TC_HashMapCompact::RT_OK)
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(sv.c_str(), sv.length());
- v.readFrom(is);
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_NO_DATA || _todo_of == NULL)
- {
- return ret;
- }
- //只读模式
- if(isReadOnly())
- {
- return TC_HashMapCompact::RT_READONLY;
- }
- //获取函数
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = k;
- ret = _todo_of->get(stDataRecord);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- v = stDataRecord._value;
- iExpireTime = stDataRecord._expiret;
- return this->set(stDataRecord._key, stDataRecord._value, stDataRecord._expiret, stDataRecord._ver, stDataRecord._dirty);
- }
- else if(ret == TC_HashMapCompact::RT_NO_GET)
- {
- return TC_HashMapCompact::RT_NO_DATA;
- }
- else if(ret == TC_HashMapCompact::RT_NO_DATA)
- {
- iExpireTime = stDataRecord._expiret;
- ret = this->set(stDataRecord._key);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- return TC_HashMapCompact::RT_ONLY_KEY;
- }
- return ret;
- }
- return TC_HashMapCompact::RT_LOAD_DATA_ERR;
- }
- /**
- * 获取数据, 修改GET时间链
- * @param k
- * @param v
- *
- * @return int:
- * TC_HashMapCompact::RT_NO_DATA: 没有数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_OK:获取数据成功
- * TC_HashMapCompact::RT_LOAD_DATA_ERR: load数据失败
- * 其他返回值: 错误
- */
- int get(const K& k, V &v)
- {
- uint32_t iSyncTime;
- uint32_t iExpireTime;
- uint8_t iVer;
- return get(k, v, iSyncTime, iExpireTime, iVer);
- }
- /**
- * 根据key, 获取相同hash值的所有数据
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param vv
- * @param c, 匹配仿函数: bool operator()(K v);
- *
- * @return int, RT_OK
- */
- template<typename C>
- int getHash(size_t h, vector<pair<K, V> > &vv, C c)
- {
- int ret = TC_HashMapCompact::RT_OK;
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- TC_HashMapCompact::FailureRecover check(&this->_t);
- size_t index = h % this->_t.getHashCount();
- size_t iAddr = this->_t.item(index)->_iBlockAddr;
- TC_HashMapCompact::Block block(&this->_t, iAddr);
- while(block.getHead() != 0)
- {
- TC_HashMapCompact::BlockData data;
- ret = block.getBlockData(data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- K tk;
- V tv;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- if(c(tk))
- {
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- vv.push_back(make_pair(tk, tv));
- }
- }
- catch(exception &ex)
- {
- }
- }
- if(!block.nextBlock())
- {
- break;
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 根据key, 获取相同hash值的所有数据
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param vv
- * @param c, 匹配仿函数: bool operator()(K v);
- *
- * @return int, RT_OK
- */
- template<typename C>
- int getHash(size_t h, vector<DataRecord> &vv, C c)
- {
- int ret = TC_HashMapCompact::RT_OK;
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- TC_HashMapCompact::FailureRecover check(&this->_t);
- size_t index = h % this->_t.getHashCount();
- size_t iAddr = this->_t.item(index)->_iBlockAddr;
- TC_HashMapCompact::Block block(&this->_t, iAddr);
- while(block.getHead() != 0)
- {
- TC_HashMapCompact::BlockData data;
- ret = block.getBlockData(data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- K tk;
- V tv;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- if(c(tk))
- {
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._ver = data._ver;
- stDataRecord._dirty = data._dirty;
- stDataRecord._expiret = data._expiret;
- stDataRecord._iSyncTime = data._synct;
- vv.push_back(stDataRecord);
- }
- }
- catch(exception &ex)
- {
- }
- }
- if(!block.nextBlock())
- {
- break;
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 恢复数据
- * 对于block记录无法读取的数据自动删除
- * @param bRepair: 是否修复
- * @return 返回删除的记录数
- */
- size_t recover(bool bRepair)
- {
- size_t c = this->_t.getHashCount();
- size_t e = 0;
- for(size_t i = 0; i < c; i++)
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- e += this->_t.recover(i, bRepair);
- }
- return e;
- }
- /**
- * 设置数据, 修改时间链, 内存不够时会自动淘汰老的数据
- * @param k: 关键字
- * @param v: 值
- * @param bDirty: 是否是脏数据
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_MEMORY: 没有空间(不淘汰数据情况下会出现)
- * TC_HashMapCompact::RT_OK: 设置成功
- * 其他返回值: 错误
- */
- int set(const K& k, const V& v, bool bDirty = true, uint32_t iExpireTime = 0, uint8_t iVersion = 0)
- {
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- tars::TarsOutputStream<BufferWriter> osv;
- v.writeTo(osv);
- string sv(osv.getBuffer(), osv.getLength());
- int ret = TC_HashMapCompact::RT_OK;
- vector<TC_HashMapCompact::BlockData> vtData;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.set(sk, sv, iExpireTime, iVersion, bDirty, vtData);
- }
- //操作淘汰数据
- if(_todo_of)
- {
- for(size_t i = 0; i < vtData.size(); i++)
- {
- K tk;
- V tv;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(vtData[i]._key.c_str(), vtData[i]._key.length());
- tk.readFrom(is);
- is.setBuffer(vtData[i]._value.c_str(), vtData[i]._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = vtData[i]._dirty;
- stDataRecord._iSyncTime = vtData[i]._synct;
- stDataRecord._expiret = vtData[i]._expiret;
- stDataRecord._ver = vtData[i]._ver;
- _todo_of->sync(stDataRecord);
- }
- catch(exception &ex)
- {
- }
- }
- }
- return ret;
- }
- /**
- * 仅设置Key, 内存不够时会自动淘汰老的数据
- * @param k: 关键字
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_MEMORY: 没有空间(不淘汰数据情况下会出现)
- * TC_HashMapCompact::RT_OK: 设置成功
- * 其他返回值: 错误
- */
- int set(const K& k, uint8_t iVersion = 0)
- {
- tars::TarsOutputStream<BufferWriter> osk;
- k.writeTo(osk);
- string sk(osk.getBuffer(), osk.getLength());
- int ret = TC_HashMapCompact::RT_OK;
- vector<TC_HashMapCompact::BlockData> vtData;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.set(sk, iVersion, vtData);
- }
- //操作淘汰数据
- if(_todo_of)
- {
- for(size_t i = 0; i < vtData.size(); i++)
- {
- K tk;
- V tv;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(vtData[i]._key.c_str(), vtData[i]._key.length());
- tk.readFrom(is);
- is.setBuffer(vtData[i]._value.c_str(), vtData[i]._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = vtData[i]._dirty;
- stDataRecord._iSyncTime = vtData[i]._synct;
- stDataRecord._expiret = vtData[i]._expiret;
- stDataRecord._ver = vtData[i]._ver;
- _todo_of->sync(stDataRecord);
- }
- catch(exception &ex)
- {
- }
- }
- }
- return ret;
- }
- /**
- * 删除数据
- * 无论cache是否有数据,todo的del都被调用
- *
- * @param k, 关键字
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key, 也删除了
- * TC_HashMapCompact::RT_OK: 删除数据成功
- * 其他返回值: 错误
- */
- int del(const K& k)
- {
- int ret = TC_HashMapCompact::RT_OK;
- TC_HashMapCompact::BlockData data;
- tars::TarsOutputStream<BufferWriter> os;
- k.writeTo(os);
- string sk(os.getBuffer(), os.getLength());
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.del(sk, data);
- }
- if(ret != TC_HashMapCompact::RT_OK && ret != TC_HashMapCompact::RT_ONLY_KEY && ret != TC_HashMapCompact::RT_NO_DATA)
- {
- return ret;
- }
- if(_todo_of)
- {
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = k;
- if(ret == TC_HashMapCompact::RT_OK)
- {
- V v;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._value.c_str(), data._value.length());
- v.readFrom(is);
- stDataRecord._value = v;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- }
- _todo_of->del((ret == TC_HashMapCompact::RT_OK), stDataRecord);
- }
- return ret;
- }
- /**
- * 删除数据
- * cache有数据,todo的erase被调用
- *
- * @param k, 关键字
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key, 也删除了
- * TC_HashMapCompact::RT_OK: 删除数据成功
- * 其他返回值: 错误
- */
- int erase(const K& k)
- {
- int ret = TC_HashMapCompact::RT_OK;
- TC_HashMapCompact::BlockData data;
- tars::TarsOutputStream<BufferWriter> os;
- k.writeTo(os);
- string sk(os.getBuffer(), os.getLength());
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.del(sk, data);
- }
- if(ret != TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(_todo_of)
- {
- V v;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._value.c_str(), data._value.length());
- v.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = k;
- stDataRecord._value = v;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->erase(stDataRecord);
- }
- return ret;
- }
- /**
- * 强制删除数据,不调用todo的erase被调用
- *
- * @param k, 关键字
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key, 也删除了
- * TC_HashMapCompact::RT_OK: 删除数据成功
- * 其他返回值: 错误
- */
- int eraseByForce(const K& k)
- {
- int ret = TC_HashMapCompact::RT_OK;
- TC_HashMapCompact::BlockData data;
- tars::TarsOutputStream<BufferWriter> os;
- k.writeTo(os);
- string sk(os.getBuffer(), os.getLength());
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.del(sk, data);
- }
- if(ret != TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- return ret;
- }
- /**
- * 根据key, 获取相同hash值的所有数据
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param vv
- * @param c, 匹配仿函数: bool operator()(K v);
- *
- * @return int, RT_OK
- */
- /**
- * 根据hash,强制删除相同hash值的所有数据,不调用todo的erase被调用
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param c, 匹配仿函数: bool operator()(K v);
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key, 也删除了
- * TC_HashMapCompact::RT_OK: 删除数据成功
- * 其他返回值: 错误
- */
- template<typename C>
- int eraseHashByForce(size_t h, C c)
- {
- int ret = TC_HashMapCompact::RT_OK;
- vector<string> vDelKey;
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- TC_HashMapCompact::FailureRecover check(&this->_t);
- size_t index = h % this->_t.getHashCount();
- size_t iAddr = this->_t.item(index)->_iBlockAddr;
- TC_HashMapCompact::Block block(&this->_t, iAddr);
- TC_HashMapCompact::BlockData data;
- while(block.getHead() != 0)
- {
- ret = block.getBlockData(data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- K tk;
- V tv;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- if(c(tk))
- vDelKey.push_back(data._key);
- }
- catch(exception &ex)
- {
- }
- }
- if(!block.nextBlock())
- {
- break;
- }
- }
- for(size_t i=0; i<vDelKey.size(); ++i)
- {
- ret = this->_t.del(vDelKey[i], data);
- if(ret != TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 根据key, 获取相同hash值的所有数据
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param vv
- * @param c, 匹配仿函数: bool operator()(K v);
- *
- * @return int, RT_OK
- */
- /**
- * 根据hash,强制删除相同hash值的所有数据,不调用todo的erase被调用
- * 注意:c匹配对象操作中, map是加锁的, 需要注意
- * @param h
- * @param c, 匹配仿函数: bool operator()(K v);
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_NO_DATA: 没有当前数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key, 也删除了
- * TC_HashMapCompact::RT_OK: 删除数据成功
- * 其他返回值: 错误
- */
- template<typename C>
- int eraseHashByForce(size_t h, C c, vector<K>& vDelK)
- {
- int ret = TC_HashMapCompact::RT_OK;
- vector<string> vDelKey;
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- TC_HashMapCompact::FailureRecover check(&this->_t);
- size_t index = h % this->_t.getHashCount();
- size_t iAddr = this->_t.item(index)->_iBlockAddr;
- TC_HashMapCompact::Block block(&this->_t, iAddr);
- TC_HashMapCompact::BlockData data;
- while(block.getHead() != 0)
- {
- ret = block.getBlockData(data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- K tk;
- try
- {
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- if(c(tk))
- {
- vDelKey.push_back(data._key);
- vDelK.push_back(tk);
- }
- }
- catch(exception &ex)
- {
- }
- }
- if(!block.nextBlock())
- {
- break;
- }
- }
- for(size_t i=0; i<vDelKey.size(); ++i)
- {
- ret = this->_t.del(vDelKey[i], data);
- if(ret != TC_HashMapCompact::RT_OK)
- {
- vDelK.resize(i);
- return ret;
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 淘汰数据, 根据Get时间淘汰
- * 直到: 元素个数/chunks * 100 < radio,bCheckDirty 为true时,遇到脏数据则淘汰结束
- * @param radio: 共享内存chunks使用比例 0< radio < 100
- * @return int:
- * TC_HashMapCompact::RT_READONLY: map只读
- * TC_HashMapCompact::RT_OK:淘汰完毕
- */
- int erase(int radio, bool bCheckDirty = false)
- {
- while(true)
- {
- int ret;
- TC_HashMapCompact::BlockData data;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.erase(radio, data, bCheckDirty);
- if(ret == TC_HashMapCompact::RT_OK || ret == TC_HashMapCompact::RT_READONLY)
- {
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_ERASE_OK)
- {
- continue;
- }
- }
- if(_todo_of)
- {
- K tk;
- V tv;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->erase(stDataRecord);
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 回写单条记录, 如果记录不存在, 则不做任何处理
- * @param k
- *
- * @return int
- * TC_HashMapCompact::RT_NO_DATA: 没有数据
- * TC_HashMapCompact::RT_ONLY_KEY:只有Key
- * TC_HashMapCompact::RT_OK:获取数据成功
- * TC_HashMapCompact::RT_LOAD_DATA_ERR: load数据失败
- * 其他返回值: 错误
- */
- int sync(const K& k)
- {
- V v;
- uint32_t iSyncTime;
- uint32_t iExpireTime;
- uint8_t iVersion;
- int ret = get(k, v, iSyncTime, iExpireTime, iVersion);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- bool bDirty = (checkDirty(k) == TC_HashMapCompact::RT_DIRTY_DATA);
- if(_todo_of)
- {
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = k;
- stDataRecord._value = v;
- stDataRecord._dirty = bDirty;
- stDataRecord._iSyncTime = iSyncTime;
- stDataRecord._expiret = iExpireTime;
- stDataRecord._ver = iVersion;
- _todo_of->sync(stDataRecord);
- }
- }
- return ret;
- }
- /**
- * 将脏数据且一定时间没有回写的数据全部回写
- * 数据回写时间与当前时间超过_pHead->_iSyncTime(setSyncTime)则需要回写
- *
- * map只读时仍然可以回写
- *
- * @param iNowTime: 回写到什么时间, 通常是当前时间
- * @return int:
- * TC_HashMapCompact::RT_OK: 回写完毕了
- */
- int sync(uint32_t iNowTime)
- {
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.sync();
- }
- while(true)
- {
- TC_HashMapCompact::BlockData data;
- int ret;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.sync(iNowTime, data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_NEED_SYNC)
- {
- continue;
- }
- }
- if(_todo_of)
- {
- K tk;
- V tv;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->sync(stDataRecord);
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- *将脏数据尾指针赋给回写尾指针
- */
- void sync()
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.sync();
- }
- /**
- * 将脏数据且一定时间没有回写的数据回写,只回写一个脏数据,目的是替代int sync(uint32_t iNowTime)
- * 方法,把由业务控制每次回写数据量,使用时应该先调用void sync()
- * 注意:c条件对象操作中, map是加锁的, 需要注意
- *
- * map只读时仍然可以回写
- *
- * @param iNowTime: 回写到什么时间, 通常是当前时间
- * @param c: 条件仿函数: bool operator()(K v);
- * @return int:
- * TC_HashMapCompact::RT_OK: 回写完毕了
- *
- * 示例:
- * p->sync();
- * while(true) {
- * int iRet = pthis->SyncOnce(tNow);
- * if( iRet == TC_HashMapCompact::RT_OK )
- * break;
- * }
- */
- template<typename C>
- int syncOnce(uint32_t iNowTime, C c)
- {
- TC_HashMapCompact::BlockData data;
- K tk;
- tars::TarsInputStream<BufferReader> is;
- int ret;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.sync(iNowTime, data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_NEED_SYNC)
- {
- return ret;
- }
- if(_todo_of)
- {
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- if(!c(tk))
- {
- this->_t.setDirtyAfterSync(data._key);
- return ret;
- }
- }
- else
- {
- return ret;
- }
- }
- V tv;
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->sync(stDataRecord);
- return ret;
- }
- /**
- * 将脏数据且一定时间没有回写的数据回写,只回写一个脏数据,目的是替代int sync(uint32_t iNowTime)
- * 方法,把由业务控制每次回写数据量,使用时应该先调用void sync()
- *
- * 数据回写时间与当前时间超过_pHead->_iSyncTime(setSyncTime)则需要回写
- * map只读时仍然可以回写
- *
- * @param iNowTime: 回写到什么时间, 通常是当前时间
- * @return int:
- * TC_HashMapCompact::RT_OK: 回写完毕了
- *
- * 示例:
- * p->sync();
- * while(true) {
- * int iRet = pthis->SyncOnce(tNow);
- * if( iRet == TC_HashMapCompact::RT_OK )
- * break;
- * }
- */
- int syncOnce(uint32_t iNowTime)
- {
-
- TC_HashMapCompact::BlockData data;
- int ret;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.sync(iNowTime, data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_NEED_SYNC)
- {
- return ret;
- }
- }
- if(_todo_of)
- {
- K tk;
- V tv;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->sync(stDataRecord);
- }
- return ret;
- }
- /**
- * 备份数据
- * map只读时仍然可以备份
- * 可以多个线程/进程备份数据,同时备份时bForceFromBegin设置为false效率更高
- *
- * @param bForceFromBegin: 是否强制重头开始备份, 通常为false
- * @return int:
- * TC_HashMapCompact::RT_OK: 备份OK了
- */
- int backup(bool bForceFromBegin = false)
- {
- {
- //开始准备备份
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- this->_t.backup(bForceFromBegin);
- }
- while(true)
- {
- TC_HashMapCompact::BlockData data;
- int ret;
- {
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- ret = this->_t.backup(data);
- if(ret == TC_HashMapCompact::RT_OK)
- {
- return ret;
- }
- if(ret != TC_HashMapCompact::RT_NEED_BACKUP)
- {
- continue;
- }
- }
- if(_todo_of)
- {
- K tk;
- V tv;
- tars::TarsInputStream<BufferReader> is;
- is.setBuffer(data._key.c_str(), data._key.length());
- tk.readFrom(is);
- is.setBuffer(data._value.c_str(), data._value.length());
- tv.readFrom(is);
- typename ToDoFunctor::DataRecord stDataRecord;
- stDataRecord._key = tk;
- stDataRecord._value = tv;
- stDataRecord._dirty = data._dirty;
- stDataRecord._iSyncTime = data._synct;
- stDataRecord._expiret = data._expiret;
- stDataRecord._ver = data._ver;
- _todo_of->backup(stDataRecord);
- }
- }
- return TC_HashMapCompact::RT_OK;
- }
- /**
- * 描述
- *
- * @return string
- */
- string desc() { return this->_t.desc(); }
- ///////////////////////////////////////////////////////////////////////////////
- /**
- * 尾部
- *
- * @return lock_iterator
- */
- lock_iterator end()
- {
- JhmAutoLockPtr jlock;
- return JhmLockIterator(this->_t.end(), jlock);
- }
- /**
- * 根据Key查找数据
- * @param k
- */
- lock_iterator find(const K& k)
- {
- tars::TarsOutputStream<BufferWriter> os;
- k.writeTo(os);
- string sk(os.getBuffer(), os.getLength());
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.find(sk), jlock);
- }
- /**
- * block正序
- *
- * @return lock_iterator
- */
- lock_iterator begin()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.begin(), jlock);
- }
- /**
- * block逆序
- *
- * @return lock_iterator
- */
- lock_iterator rbegin()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.rbegin(), jlock);
- }
- /**
- * 以Set时间排序的迭代器
- * 返回的迭代器++表示按照时间顺序:最近Set-->最久Set
- *
- * @return lock_iterator
- */
- lock_iterator beginSetTime()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.beginSetTime(), jlock);
- }
- /**
- * Set时间链逆序的迭代器
- *
- * 返回的迭代器++表示按照时间顺序:最久Set-->最近Set
- *
- * @return lock_iterator
- */
- lock_iterator rbeginSetTime()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.rbeginSetTime(), jlock);
- }
- /**
- * 以Get时间排序的迭代器
- * 返回的迭代器++表示按照时间顺序:最近Get-->最久Get
- *
- * @return lock_iterator
- */
- lock_iterator beginGetTime()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.beginGetTime(), jlock);
- }
- /**
- * Get时间链逆序的迭代器
- *
- * 返回的迭代器++表示按照时间顺序:最久Get-->最近Get
- *
- * @return lock_iterator
- */
- lock_iterator rbeginGetTime()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.rbeginGetTime(), jlock);
- }
- /**
- * 获取脏链表尾部迭代器(最长时间没有Set的脏数据)
- *
- * 返回的迭代器++表示按照时间顺序:最近Set-->最久Set
- * 可能存在干净数据
- *
- * @return lock_iterator
- */
- lock_iterator beginDirty()
- {
- JhmAutoLockPtr jlock(new JhmAutoLock(this->mutex()));
- return JhmLockIterator(this->_t.beginDirty(), jlock);
- }
- /////////////////////////////////////////////////////////////////////////////////////////
- // 以下是遍历map函数, 不需要对map加锁
- /**
- * 根据hash桶遍历
- *
- * @return hash_iterator
- */
- hash_iterator hashBegin()
- {
- JhmLockPtr jlock(new JhmLock(this->mutex()));
- TC_LockT<typename LockPolicy::Mutex> lock(LockPolicy::mutex());
- return JhmIterator(this->_t.hashBegin(), jlock);
- }
- /**
- * 结束
- *
- * @return
- */
- hash_iterator hashEnd()
- {
- JhmLockPtr jlock;
- return JhmIterator(this->_t.hashEnd(), jlock);
- }
- protected:
- /**
- * 删除数据的函数对象
- */
- ToDoFunctor *_todo_of;
- };
- }
- #endif
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