410 lines
20 KiB
HTML
410 lines
20 KiB
HTML
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<title>deadsimplekv API documentation</title>
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Copyright (C) 2019 Kevin Froman …" />
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<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
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</head>
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<body>
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<main>
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<article id="content">
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<header>
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<h1 class="title"><code>deadsimplekv</code> module</h1>
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</header>
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<section id="section-intro">
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<p>DeadSimpleKv. An extremely simple key-value storage system with cache
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Copyright (C) 2019 Kevin Froman</p>
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<p>This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.</p>
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<p>This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the
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GNU General Public License for more details.</p>
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<p>You should have received a copy of the GNU General Public License
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along with this program.
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If not, see <a href="https://www.gnu.org/licenses/">https://www.gnu.org/licenses/</a>.</p>
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<details class="source">
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<summary>Source code</summary>
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<pre><code class="python">'''
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DeadSimpleKv. An extremely simple key-value storage system with cache
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Copyright (C) 2019 Kevin Froman
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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'''
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import json, time, math, os
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def _is_serializable(data):
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try:
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json.dumps(data)
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return True
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except TypeError:
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return False
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class DeadSimpleKV:
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def __init__(self, file_path=None, refresh_seconds=0, flush_seconds=0):
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'''
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Accepts a file path and refresh.
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If file_path is not set, no data will be written to disk.
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Refresh is an integer specifying how many seconds should pass before data is re-read from disk.
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If refresh_seconds or flush_seconds are set to None they will not be done automatically
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'''
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temp_time = DeadSimpleKV._get_epoch() # Initialization time
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self.file_path = file_path # The file path where we write our data in JSON format
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self.refresh_seconds = refresh_seconds # How often to refresh the
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self.flush_seconds = flush_seconds # How often to flush out when setting
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self._data = {} # The key store (in memory)
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self._last_refresh = temp_time # time last refreshed from disk
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self._last_flush = temp_time # time last flushed to disk
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try:
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if os.path.exists(file_path):
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self.refresh()
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except TypeError:
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pass
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def get(self, key):
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self._do_auto_refresh()
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try:
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return self._data[key]
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except KeyError:
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return None
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def put(self, key, value):
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'''Value setter. Will automatically flush if auto_flush is True and file_path is not None
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Will return value error if either key or value are not JSON serializable
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'''
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self._data[key] = value # Set the key
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# Check if key and value can be put in JSON
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if not _is_serializable(key):
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raise ValueError('%s is not JSON serializable' % (key,))
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if not _is_serializable(value):
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raise ValueError('%s is not JSON serializable' % (value,))
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self._do_auto_flush()
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return (key, value)
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def delete(self, key):
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'''Deletes value. Will automatically flush if auto_flush is True and file_path is not None'''
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del self._data[key]
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self._do_auto_flush()
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def refresh(self):
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'''Refresh data and then mark time read. Can be manually called'''
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try:
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self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
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except FileNotFoundError:
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pass
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self._last_refresh = DeadSimpleKV._get_epoch()
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def flush(self):
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'''Write out then mark time flushed. Can be manually called'''
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DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
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self._last_flush = DeadSimpleKV._get_epoch()
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def _do_auto_flush(self):
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if self.flush_seconds is not None and self.file_path is not None:
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# flush if automatic and it is time to do so
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if DeadSimpleKV._get_epoch() - self._last_flush >= self.flush_seconds:
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self.flush()
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def _do_auto_refresh(self):
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if self.refresh_seconds is not None and self.file_path is not None:
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# refresh if automatic and time to do so
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if DeadSimpleKV._get_epoch() - self._last_refresh >= self.refresh_seconds:
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self.refresh()
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@staticmethod
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def _get_epoch():
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return math.floor(time.time())
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@staticmethod
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def _write_out(file_path, data):
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'''Write out the raw data'''
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with open(file_path, 'w') as write_file:
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write_file.write(data)
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@staticmethod
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def _read_in(file_path):
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'''Read in raw data'''
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with open(file_path, 'r') as read_file:
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return read_file.read()</code></pre>
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</details>
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</section>
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<section>
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</section>
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<section>
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</section>
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<section>
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</section>
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<section>
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<h2 class="section-title" id="header-classes">Classes</h2>
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<dl>
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<dt id="deadsimplekv.DeadSimpleKV"><code class="flex name class">
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<span>class <span class="ident">DeadSimpleKV</span></span>
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</code></dt>
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<dd>
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<section class="desc"></section>
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<details class="source">
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<summary>Source code</summary>
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<pre><code class="python">class DeadSimpleKV:
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def __init__(self, file_path=None, refresh_seconds=0, flush_seconds=0):
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'''
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Accepts a file path and refresh.
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If file_path is not set, no data will be written to disk.
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Refresh is an integer specifying how many seconds should pass before data is re-read from disk.
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If refresh_seconds or flush_seconds are set to None they will not be done automatically
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'''
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temp_time = DeadSimpleKV._get_epoch() # Initialization time
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self.file_path = file_path # The file path where we write our data in JSON format
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self.refresh_seconds = refresh_seconds # How often to refresh the
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self.flush_seconds = flush_seconds # How often to flush out when setting
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self._data = {} # The key store (in memory)
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self._last_refresh = temp_time # time last refreshed from disk
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self._last_flush = temp_time # time last flushed to disk
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try:
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if os.path.exists(file_path):
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self.refresh()
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except TypeError:
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pass
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def get(self, key):
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self._do_auto_refresh()
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try:
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return self._data[key]
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except KeyError:
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return None
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def put(self, key, value):
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'''Value setter. Will automatically flush if auto_flush is True and file_path is not None
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Will return value error if either key or value are not JSON serializable
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'''
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self._data[key] = value # Set the key
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# Check if key and value can be put in JSON
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if not _is_serializable(key):
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raise ValueError('%s is not JSON serializable' % (key,))
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if not _is_serializable(value):
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raise ValueError('%s is not JSON serializable' % (value,))
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self._do_auto_flush()
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return (key, value)
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def delete(self, key):
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'''Deletes value. Will automatically flush if auto_flush is True and file_path is not None'''
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del self._data[key]
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self._do_auto_flush()
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def refresh(self):
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'''Refresh data and then mark time read. Can be manually called'''
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try:
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self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
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except FileNotFoundError:
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pass
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self._last_refresh = DeadSimpleKV._get_epoch()
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def flush(self):
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'''Write out then mark time flushed. Can be manually called'''
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DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
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self._last_flush = DeadSimpleKV._get_epoch()
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def _do_auto_flush(self):
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if self.flush_seconds is not None and self.file_path is not None:
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# flush if automatic and it is time to do so
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if DeadSimpleKV._get_epoch() - self._last_flush >= self.flush_seconds:
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self.flush()
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def _do_auto_refresh(self):
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if self.refresh_seconds is not None and self.file_path is not None:
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# refresh if automatic and time to do so
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if DeadSimpleKV._get_epoch() - self._last_refresh >= self.refresh_seconds:
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self.refresh()
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@staticmethod
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def _get_epoch():
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return math.floor(time.time())
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@staticmethod
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def _write_out(file_path, data):
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'''Write out the raw data'''
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with open(file_path, 'w') as write_file:
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write_file.write(data)
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@staticmethod
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def _read_in(file_path):
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'''Read in raw data'''
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with open(file_path, 'r') as read_file:
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return read_file.read()</code></pre>
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</details>
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<h3>Methods</h3>
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<dl>
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<dt id="deadsimplekv.DeadSimpleKV.__init__"><code class="name flex">
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<span>def <span class="ident">__init__</span></span>(<span>self, file_path=None, refresh_seconds=0, flush_seconds=0)</span>
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</code></dt>
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<dd>
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<section class="desc"><p>Accepts a file path and refresh.
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If file_path is not set, no data will be written to disk.
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Refresh is an integer specifying how many seconds should pass before data is re-read from disk.
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If refresh_seconds or flush_seconds are set to None they will not be done automatically</p></section>
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<details class="source">
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<summary>Source code</summary>
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<pre><code class="python">def __init__(self, file_path=None, refresh_seconds=0, flush_seconds=0):
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'''
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Accepts a file path and refresh.
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If file_path is not set, no data will be written to disk.
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Refresh is an integer specifying how many seconds should pass before data is re-read from disk.
|
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If refresh_seconds or flush_seconds are set to None they will not be done automatically
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'''
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temp_time = DeadSimpleKV._get_epoch() # Initialization time
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self.file_path = file_path # The file path where we write our data in JSON format
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self.refresh_seconds = refresh_seconds # How often to refresh the
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self.flush_seconds = flush_seconds # How often to flush out when setting
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self._data = {} # The key store (in memory)
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self._last_refresh = temp_time # time last refreshed from disk
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self._last_flush = temp_time # time last flushed to disk
|
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try:
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if os.path.exists(file_path):
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self.refresh()
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except TypeError:
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pass</code></pre>
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</details>
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</dd>
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<dt id="deadsimplekv.DeadSimpleKV.delete"><code class="name flex">
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<span>def <span class="ident">delete</span></span>(<span>self, key)</span>
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</code></dt>
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<dd>
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<section class="desc"><p>Deletes value. Will automatically flush if auto_flush is True and file_path is not None</p></section>
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<details class="source">
|
|
<summary>Source code</summary>
|
|
<pre><code class="python">def delete(self, key):
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'''Deletes value. Will automatically flush if auto_flush is True and file_path is not None'''
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del self._data[key]
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self._do_auto_flush()</code></pre>
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</details>
|
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</dd>
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<dt id="deadsimplekv.DeadSimpleKV.flush"><code class="name flex">
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<span>def <span class="ident">flush</span></span>(<span>self)</span>
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</code></dt>
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<dd>
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<section class="desc"><p>Write out then mark time flushed. Can be manually called</p></section>
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<details class="source">
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<summary>Source code</summary>
|
|
<pre><code class="python">def flush(self):
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'''Write out then mark time flushed. Can be manually called'''
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DeadSimpleKV._write_out(self.file_path, json.dumps(self._data))
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self._last_flush = DeadSimpleKV._get_epoch()</code></pre>
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</details>
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</dd>
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<dt id="deadsimplekv.DeadSimpleKV.get"><code class="name flex">
|
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<span>def <span class="ident">get</span></span>(<span>self, key)</span>
|
|
</code></dt>
|
|
<dd>
|
|
<section class="desc"></section>
|
|
<details class="source">
|
|
<summary>Source code</summary>
|
|
<pre><code class="python">def get(self, key):
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self._do_auto_refresh()
|
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try:
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return self._data[key]
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except KeyError:
|
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return None</code></pre>
|
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</details>
|
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</dd>
|
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<dt id="deadsimplekv.DeadSimpleKV.put"><code class="name flex">
|
|
<span>def <span class="ident">put</span></span>(<span>self, key, value)</span>
|
|
</code></dt>
|
|
<dd>
|
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<section class="desc"><p>Value setter. Will automatically flush if auto_flush is True and file_path is not None
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Will return value error if either key or value are not JSON serializable</p></section>
|
|
<details class="source">
|
|
<summary>Source code</summary>
|
|
<pre><code class="python">def put(self, key, value):
|
|
'''Value setter. Will automatically flush if auto_flush is True and file_path is not None
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Will return value error if either key or value are not JSON serializable
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'''
|
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self._data[key] = value # Set the key
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|
|
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# Check if key and value can be put in JSON
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|
if not _is_serializable(key):
|
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raise ValueError('%s is not JSON serializable' % (key,))
|
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if not _is_serializable(value):
|
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raise ValueError('%s is not JSON serializable' % (value,))
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self._do_auto_flush()
|
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return (key, value)</code></pre>
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</details>
|
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</dd>
|
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<dt id="deadsimplekv.DeadSimpleKV.refresh"><code class="name flex">
|
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<span>def <span class="ident">refresh</span></span>(<span>self)</span>
|
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</code></dt>
|
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<dd>
|
|
<section class="desc"><p>Refresh data and then mark time read. Can be manually called</p></section>
|
|
<details class="source">
|
|
<summary>Source code</summary>
|
|
<pre><code class="python">def refresh(self):
|
|
'''Refresh data and then mark time read. Can be manually called'''
|
|
try:
|
|
self._data = json.loads(DeadSimpleKV._read_in(self.file_path))
|
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except FileNotFoundError:
|
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pass
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self._last_refresh = DeadSimpleKV._get_epoch()</code></pre>
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</details>
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</dd>
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</dl>
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</dd>
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</dl>
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</section>
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<h1>Index</h1>
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<div class="toc">
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<ul></ul>
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</div>
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<ul id="index">
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<li><h3><a href="#header-classes">Classes</a></h3>
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<ul>
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<li>
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<h4><code><a title="deadsimplekv.DeadSimpleKV" href="#deadsimplekv.DeadSimpleKV">DeadSimpleKV</a></code></h4>
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<ul class="two-column">
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<li><code><a title="deadsimplekv.DeadSimpleKV.__init__" href="#deadsimplekv.DeadSimpleKV.__init__">__init__</a></code></li>
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<li><code><a title="deadsimplekv.DeadSimpleKV.delete" href="#deadsimplekv.DeadSimpleKV.delete">delete</a></code></li>
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<li><code><a title="deadsimplekv.DeadSimpleKV.flush" href="#deadsimplekv.DeadSimpleKV.flush">flush</a></code></li>
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<li><code><a title="deadsimplekv.DeadSimpleKV.get" href="#deadsimplekv.DeadSimpleKV.get">get</a></code></li>
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<li><code><a title="deadsimplekv.DeadSimpleKV.put" href="#deadsimplekv.DeadSimpleKV.put">put</a></code></li>
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<li><code><a title="deadsimplekv.DeadSimpleKV.refresh" href="#deadsimplekv.DeadSimpleKV.refresh">refresh</a></code></li>
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</ul>
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</li>
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