added flush at exit

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Kevin Froman 2019-06-10 19:01:08 -05:00
parent e8d989189f
commit 0e46b49e9c
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5 changed files with 66 additions and 29 deletions

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@ -10,7 +10,7 @@ It doesn't do anything crazy. It just takes json serializable data and stores it
You can control when and where to read/write, and that's it.
No bloat, only 3 public methods.
No bloat, only 5 public methods.
## Usage
@ -43,4 +43,4 @@ kv.get('my_key') # returns True.
kv.delete('my_key')
~~~
***Warning:*** **Be sure to manually flush when destroying the kv instance (such as by exiting your program) to avoid losing data, as flushes only happen when .put has been called.**
***Warning:*** **Be sure to keep flush_on_exit set to true or manually flush when destroying the kv instance (such as by exiting your program) to avoid losing data.**

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@ -15,7 +15,7 @@
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
'''
import json, time, math, os
import json, time, math, os, atexit
def _is_serializable(data):
'''
@ -28,12 +28,12 @@ def _is_serializable(data):
return False
class DeadSimpleKV:
def __init__(self, file_path=None, refresh_seconds=0, flush_seconds=0):
def __init__(self, file_path=None, refresh_seconds=0, flush_seconds=0, flush_on_exit=True):
'''
Accepts a file path and refresh.
If file_path is not set, no data will be written to disk.
Refresh is an integer specifying how many seconds should pass before data is re-read from disk.
If refresh_seconds or flush_seconds are set to None they will not be done automatically
If refresh_seconds or flush_seconds are set to None they will not be done automatically (except where flush_on_exit applies)
'''
temp_time = DeadSimpleKV._get_epoch() # Initialization time
self.file_path = file_path # The file path where we write our data in JSON format
@ -49,6 +49,9 @@ class DeadSimpleKV:
except TypeError:
pass
if flush_on_exit:
atexit.register(self.flush)
def get(self, key):
'''
Accepts key, which must be json serializable

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@ -3,14 +3,14 @@
<head>
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<title>deadsimplekv API documentation</title>
<meta name="description" content="DeadSimpleKv. An extremely simple key-value storage system with cache
Copyright (C) 2019 Kevin Froman …" />
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</head>
@ -57,6 +57,9 @@ If not, see <a href="https://www.gnu.org/licenses/">https://www.gnu.org/licenses
import json, time, math, os
def _is_serializable(data):
&#39;&#39;&#39;
Test if something is able to be in JSON format
&#39;&#39;&#39;
try:
json.dumps(data)
return True
@ -86,6 +89,9 @@ class DeadSimpleKV:
pass
def get(self, key):
&#39;&#39;&#39;
Accepts key, which must be json serializable
&#39;&#39;&#39;
self._do_auto_refresh()
try:
return self._data[key]
@ -93,7 +99,8 @@ class DeadSimpleKV:
return None
def put(self, key, value):
&#39;&#39;&#39;Value setter. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
Value setter. Will automatically flush if auto_flush is True and file_path is not None
Will return value error if either key or value are not JSON serializable
&#39;&#39;&#39;
self._data[key] = value # Set the key
@ -107,12 +114,16 @@ class DeadSimpleKV:
return (key, value)
def delete(self, key):
&#39;&#39;&#39;Deletes value. Will automatically flush if auto_flush is True and file_path is not None&#39;&#39;&#39;
&#39;&#39;&#39;
Deletes value. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
del self._data[key]
self._do_auto_flush()
def refresh(self):
&#39;&#39;&#39;Refresh data and then mark time read. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Refresh data and then mark time read. Can be manually called
&#39;&#39;&#39;
try:
self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
except FileNotFoundError:
@ -120,7 +131,9 @@ class DeadSimpleKV:
self._last_refresh = DeadSimpleKV._get_epoch()
def flush(self):
&#39;&#39;&#39;Write out then mark time flushed. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Write out then mark time flushed. Can be manually called
&#39;&#39;&#39;
DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
self._last_flush = DeadSimpleKV._get_epoch()
@ -131,8 +144,8 @@ class DeadSimpleKV:
self.flush()
def _do_auto_refresh(self):
# Automatically flush if it is enabled and time to do so
if self.refresh_seconds is not None and self.file_path is not None:
# refresh if automatic and time to do so
if DeadSimpleKV._get_epoch() - self._last_refresh &gt;= self.refresh_seconds:
self.refresh()
@ -192,6 +205,9 @@ class DeadSimpleKV:
pass
def get(self, key):
&#39;&#39;&#39;
Accepts key, which must be json serializable
&#39;&#39;&#39;
self._do_auto_refresh()
try:
return self._data[key]
@ -199,7 +215,8 @@ class DeadSimpleKV:
return None
def put(self, key, value):
&#39;&#39;&#39;Value setter. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
Value setter. Will automatically flush if auto_flush is True and file_path is not None
Will return value error if either key or value are not JSON serializable
&#39;&#39;&#39;
self._data[key] = value # Set the key
@ -213,12 +230,16 @@ class DeadSimpleKV:
return (key, value)
def delete(self, key):
&#39;&#39;&#39;Deletes value. Will automatically flush if auto_flush is True and file_path is not None&#39;&#39;&#39;
&#39;&#39;&#39;
Deletes value. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
del self._data[key]
self._do_auto_flush()
def refresh(self):
&#39;&#39;&#39;Refresh data and then mark time read. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Refresh data and then mark time read. Can be manually called
&#39;&#39;&#39;
try:
self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
except FileNotFoundError:
@ -226,7 +247,9 @@ class DeadSimpleKV:
self._last_refresh = DeadSimpleKV._get_epoch()
def flush(self):
&#39;&#39;&#39;Write out then mark time flushed. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Write out then mark time flushed. Can be manually called
&#39;&#39;&#39;
DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
self._last_flush = DeadSimpleKV._get_epoch()
@ -237,8 +260,8 @@ class DeadSimpleKV:
self.flush()
def _do_auto_refresh(self):
# Automatically flush if it is enabled and time to do so
if self.refresh_seconds is not None and self.file_path is not None:
# refresh if automatic and time to do so
if DeadSimpleKV._get_epoch() - self._last_refresh &gt;= self.refresh_seconds:
self.refresh()
@ -300,7 +323,9 @@ If refresh_seconds or flush_seconds are set to None they will not be done automa
<details class="source">
<summary>Source code</summary>
<pre><code class="python">def delete(self, key):
&#39;&#39;&#39;Deletes value. Will automatically flush if auto_flush is True and file_path is not None&#39;&#39;&#39;
&#39;&#39;&#39;
Deletes value. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
del self._data[key]
self._do_auto_flush()</code></pre>
</details>
@ -313,7 +338,9 @@ If refresh_seconds or flush_seconds are set to None they will not be done automa
<details class="source">
<summary>Source code</summary>
<pre><code class="python">def flush(self):
&#39;&#39;&#39;Write out then mark time flushed. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Write out then mark time flushed. Can be manually called
&#39;&#39;&#39;
DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
self._last_flush = DeadSimpleKV._get_epoch()</code></pre>
</details>
@ -322,10 +349,13 @@ If refresh_seconds or flush_seconds are set to None they will not be done automa
<span>def <span class="ident">get</span></span>(<span>self, key)</span>
</code></dt>
<dd>
<section class="desc"></section>
<section class="desc"><p>Accepts key, which must be json serializable</p></section>
<details class="source">
<summary>Source code</summary>
<pre><code class="python">def get(self, key):
&#39;&#39;&#39;
Accepts key, which must be json serializable
&#39;&#39;&#39;
self._do_auto_refresh()
try:
return self._data[key]
@ -342,7 +372,8 @@ Will return value error if either key or value are not JSON serializable</p></se
<details class="source">
<summary>Source code</summary>
<pre><code class="python">def put(self, key, value):
&#39;&#39;&#39;Value setter. Will automatically flush if auto_flush is True and file_path is not None
&#39;&#39;&#39;
Value setter. Will automatically flush if auto_flush is True and file_path is not None
Will return value error if either key or value are not JSON serializable
&#39;&#39;&#39;
self._data[key] = value # Set the key
@ -364,7 +395,9 @@ Will return value error if either key or value are not JSON serializable</p></se
<details class="source">
<summary>Source code</summary>
<pre><code class="python">def refresh(self):
&#39;&#39;&#39;Refresh data and then mark time read. Can be manually called&#39;&#39;&#39;
&#39;&#39;&#39;
Refresh data and then mark time read. Can be manually called
&#39;&#39;&#39;
try:
self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
except FileNotFoundError:
@ -402,7 +435,7 @@ Will return value error if either key or value are not JSON serializable</p></se
</nav>
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@ -1,10 +1,10 @@
from distutils.core import setup
setup(name='deadsimplekv-beardog',
version='0.0.1',
setup(name='deadsimplekv',
version='0.1.1',
description='Very simple key-value store for Python',
author='Kevin Froman',
author_email='beardog@firemail.cc',
author_email='beardog@mailbox.org',
url='https://github.com/beardog108/deadsimplekv',
packages=['deadsimplekv'],
)

View File

@ -23,6 +23,7 @@ def get_test_id():
return str(uuid.uuid4()) + '.dat'
class TestInit(unittest.TestCase):
def test_init(self):
kv = deadsimplekv.DeadSimpleKV(get_test_id())