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welmendswelmends
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implement Object Pool Pattern
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+196
-8
lines changed

3 files changed

+196
-8
lines changed

‎ObjectPool/.ipynb_checkpoints/ObjectPool-checkpoint.ipynb‎

Lines changed: 70 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -4,18 +4,84 @@
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Object Pool - \n",
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"### Object Pool - Tem o objetivo de reduzir o tempo e custo das instanciações, reaproveitando objetos.\n",
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"\n",
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"### Mais Informações:\n",
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"- "
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"- https://sourcemaking.com/design_patterns/object_pool\n",
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"- http://www.csi.uneb.br/padroes_de_projetos/object_pool.html"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": []
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"source": [
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"class DB:\n",
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" def __init__(self, id=None):\n",
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" self.id = id\n",
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" \n",
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" def __repr__(self):\n",
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" return 'DB Id: {} | Memory Address: {}'.format(self.id, hex(id(self)))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
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"class DBPool:\n",
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" def __init__(self, size):\n",
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" self._dbs = [DB(_) for _ in range(size)]\n",
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"\n",
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" def acquire(self):\n",
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" return self._dbs.pop()\n",
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"\n",
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" def release(self, db):\n",
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" self._dbs.append(db)\n",
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" \n",
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" def getPoolSize(self):\n",
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" return len(self._dbs)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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">> Create Pool..\n",
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"Pool size: 10\n",
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">> Acquire 2 dbs..\n",
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"DB Id: 9 | Memory Address: 0x7f5dcefc0c88\n",
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"DB Id: 8 | Memory Address: 0x7f5dcefc0c50\n",
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"Pool size: 8\n",
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">> Release 2 dbs..\n",
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"Pool size: 10\n"
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]
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}
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],
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"source": [
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"print('>> Create Pool..')\n",
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"dbpool = DBPool(10)\n",
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"print('Pool size: ' + str(dbpool.getPoolSize()))\n",
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"\n",
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"print('>> Acquire 2 dbs..')\n",
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"db1 = dbpool.acquire()\n",
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"db2 = dbpool.acquire()\n",
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"print(db1)\n",
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"print(db2)\n",
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"print('Pool size: ' + str(dbpool.getPoolSize()))\n",
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"\n",
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"print('>> Release 2 dbs..')\n",
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"dbpool.release(db1)\n",
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"dbpool.release(db2)\n",
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"print('Pool size: ' + str(dbpool.getPoolSize()))"
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]
1985
}
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],
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"metadata": {

‎ObjectPool/ObjectPool.ipynb‎

Lines changed: 70 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -4,18 +4,84 @@
44
"cell_type": "markdown",
55
"metadata": {},
66
"source": [
7-
"### Object Pool - \n",
7+
"### Object Pool - Tem o objetivo de reduzir o tempo e custo das instanciações, reaproveitando objetos.\n",
88
"\n",
99
"### Mais Informações:\n",
10-
"- "
10+
"- https://sourcemaking.com/design_patterns/object_pool\n",
11+
"- http://www.csi.uneb.br/padroes_de_projetos/object_pool.html"
1112
]
1213
},
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{
1415
"cell_type": "code",
15-
"execution_count": null,
16+
"execution_count": 1,
1617
"metadata": {},
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"outputs": [],
18-
"source": []
19+
"source": [
20+
"class DB:\n",
21+
" def __init__(self, id=None):\n",
22+
" self.id = id\n",
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" \n",
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" def __repr__(self):\n",
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" return 'DB Id: {} | Memory Address: {}'.format(self.id, hex(id(self)))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
34+
"class DBPool:\n",
35+
" def __init__(self, size):\n",
36+
" self._dbs = [DB(_) for _ in range(size)]\n",
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"\n",
38+
" def acquire(self):\n",
39+
" return self._dbs.pop()\n",
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"\n",
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" def release(self, db):\n",
42+
" self._dbs.append(db)\n",
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" \n",
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" def getPoolSize(self):\n",
45+
" return len(self._dbs)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
57+
">> Create Pool..\n",
58+
"Pool size: 10\n",
59+
">> Acquire 2 dbs..\n",
60+
"DB Id: 9 | Memory Address: 0x7f5dcefc0c88\n",
61+
"DB Id: 8 | Memory Address: 0x7f5dcefc0c50\n",
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"Pool size: 8\n",
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">> Release 2 dbs..\n",
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"Pool size: 10\n"
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]
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}
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],
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"source": [
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"print('>> Create Pool..')\n",
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"dbpool = DBPool(10)\n",
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"print('Pool size: ' + str(dbpool.getPoolSize()))\n",
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"\n",
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"print('>> Acquire 2 dbs..')\n",
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"db1 = dbpool.acquire()\n",
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"db2 = dbpool.acquire()\n",
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"print(db1)\n",
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"print(db2)\n",
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"print('Pool size: ' + str(dbpool.getPoolSize()))\n",
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"\n",
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"print('>> Release 2 dbs..')\n",
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"dbpool.release(db1)\n",
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"dbpool.release(db2)\n",
83+
"print('Pool size: ' + str(dbpool.getPoolSize()))"
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]
1985
}
2086
],
2187
"metadata": {

‎ObjectPool/ObjectPool.py‎

Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,56 @@
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#!/usr/bin/env python
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# coding: utf-8
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# ### Object Pool - Tem o objetivo de reduzir o tempo e custo das instanciações, reaproveitando objetos.
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#
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# ### Mais Informações:
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# - https://sourcemaking.com/design_patterns/object_pool
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# - http://www.csi.uneb.br/padroes_de_projetos/object_pool.html
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# In[1]:
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class DB:
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def __init__(self, id=None):
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self.id = id
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def __repr__(self):
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return 'DB Id: {} | Memory Address: {}'.format(self.id, hex(id(self)))
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20+
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# In[2]:
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23+
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class DBPool:
25+
def __init__(self, size):
26+
self._dbs = [DB(_) for _ in range(size)]
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def acquire(self):
29+
return self._dbs.pop()
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31+
def release(self, db):
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self._dbs.append(db)
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def getPoolSize(self):
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return len(self._dbs)
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# In[3]:
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print('>> Create Pool..')
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dbpool = DBPool(10)
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print('Pool size: ' + str(dbpool.getPoolSize()))
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print('>> Acquire 2 dbs..')
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db1 = dbpool.acquire()
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db2 = dbpool.acquire()
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print(db1)
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print(db2)
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print('Pool size: ' + str(dbpool.getPoolSize()))
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print('>> Release 2 dbs..')
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dbpool.release(db1)
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dbpool.release(db2)
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print('Pool size: ' + str(dbpool.getPoolSize()))
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