Pastable version of fragment cache

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            <pre class="sunburst"><span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> i use this method instead of &quot;render&quot;</span>
<span style="color:#89BDFF;">render_from_cache_or_render</span>(<span style="color:#3387CC;"><span style="color:#3387CC;">:</span>cache_key</span> =&gt;”cache key”, <span style="color:#3387CC;"><span style="color:#3387CC;">:</span>cache_expire_after</span> =&gt; <span style="color:#9B859D;">ConstantHelper</span>::<span style="color:#89BDFF;">TAG_CLOUD_EXPIRED_IN</span>, <span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> minute</span>

<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> implementation</span>
<span style="color:#E28964;">def</span> <span style="color:#89BDFF;">render_from_cache_or_render</span>(<span style="color:#3E87E3;">p_args</span>)

<span style="color:#E28964;">return</span> <span style="color:#89BDFF;">render</span>(p_args) <span style="color:#E28964;">if</span> <span style="color:#3387CC;">true</span> <span style="color:#E28964;">==</span> p_args[<span style="color:#3387CC;"><span style="color:#3387CC;">:</span>cache_off</span>]

<span style="color:#AEAEAE;font-style:italic;">    <span style="color:#AEAEAE;font-style:italic;">#</span> check from cache</span>
    cache_key <span style="color:#E28964;">=</span> p_args[<span style="color:#3387CC;"><span style="color:#3387CC;">:</span>cache_key</span>]
    cached_content <span style="color:#E28964;">=</span> <span style="color:#9B859D;">CacheService</span>.<span style="color:#89BDFF;">get_cache</span>(cache_key)

<span style="color:#E28964;">if</span> <span style="color:#E28964;">not</span> cached_content.<span style="color:#89BDFF;">nil?</span> <span style="color:#E28964;">and</span> <span style="color:#E28964;">not</span> cached_content.<span style="color:#89BDFF;">empty?</span>
      <span style="color:#E28964;">return</span> cached_content
    <span style="color:#E28964;">else</span>
    content <span style="color:#E28964;">=</span> <span style="color:#89BDFF;">render</span>(p_args)
    
<span style="color:#AEAEAE;font-style:italic;">    <span style="color:#AEAEAE;font-style:italic;">#</span> cache expire time if defined</span>
    cache_expire_time_in_minutes <span style="color:#E28964;">=</span> p_args[<span style="color:#3387CC;"><span style="color:#3387CC;">:</span>cache_expire_after</span>] <span style="color:#E28964;">||</span> <span style="color:#3387CC;">60</span>
      <span style="color:#9B859D;">CacheService</span>.<span style="color:#89BDFF;">add_cache</span>(cache_key, cache_expire_time_in_minutes, content)
      <span style="color:#E28964;">return</span> content
    <span style="color:#E28964;">end</span>
<span style="color:#E28964;">end</span>

<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> complete source code of cache service</span>
<span style="color:#E28964;">module</span> <span style="text-decoration:underline;">Cache</span>
    <span style="color:#E28964;">class</span> <span style="text-decoration:underline;">Item</span>
      <span style="color:#E28964;">attr_accessor</span> <span style="color:#3387CC;"><span style="color:#3387CC;">:</span>key</span>, <span style="color:#3387CC;"><span style="color:#3387CC;">:</span>expire_time</span>, <span style="color:#3387CC;"><span style="color:#3387CC;">:</span>content</span>, <span style="color:#3387CC;"><span style="color:#3387CC;">:</span>created_on</span>

<span style="color:#E28964;">def</span> <span style="color:#89BDFF;">initialize</span>(<span style="color:#3E87E3;">p_key<span style="color:#3E87E3;">,</span> p_expire_time<span style="color:#3E87E3;">,</span> p_content</span>)
        <span style="color:#3E87E3;"><span style="color:#3E87E3;">@</span>key</span> <span style="color:#E28964;">=</span> p_key
        <span style="color:#3E87E3;"><span style="color:#3E87E3;">@</span>expire_time</span> <span style="color:#E28964;">=</span> p_expire_time <span style="color:#E28964;">*</span> <span style="color:#3387CC;">60</span> <span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> in minutes</span>
        <span style="color:#3E87E3;"><span style="color:#3E87E3;">@</span>content</span> <span style="color:#E28964;">=</span> p_content
        <span style="color:#3E87E3;"><span style="color:#3E87E3;">@</span>created_on</span> <span style="color:#E28964;">=</span> <span style="color:#9B859D;">Time</span>.<span style="color:#89BDFF;">now</span>
      <span style="color:#E28964;">end</span>
    <span style="color:#E28964;">end</span>
<span style="color:#E28964;">end</span>

<span style="color:#E28964;">class</span> <span style="text-decoration:underline;">CacheService</span>
    <span style="color:#3E87E3;"><span style="color:#3E87E3;">@@</span>CACHES</span> <span style="color:#E28964;">=</span> {}
    <span style="color:#3E87E3;"><span style="color:#3E87E3;">@@</span>CACHE_EXPIRE_TIMES</span> <span style="color:#E28964;">=</span> {}

<span style="color:#E28964;">def</span> <span style="color:#89BDFF;">self.add_cache</span>(<span style="color:#3E87E3;">p_key<span style="color:#3E87E3;">,</span> p_expire_time<span style="color:#3E87E3;">,</span> p_content</span>)
      cache_item <span style="color:#E28964;">=</span> <span style="color:#9B859D;">Cache</span>::<span style="color:#89BDFF;">Item</span>.<span style="color:#89BDFF;">new</span>(p_key, p_expire_time, p_content)
      <span style="color:#3E87E3;"><span style="color:#3E87E3;">@@</span>CACHES</span>[p_key.<span style="color:#89BDFF;">to_sym</span>] <span style="color:#E28964;">=</span> cache_item
    <span style="color:#E28964;">end</span>

<span style="color:#E28964;">def</span> <span style="color:#89BDFF;">self.get_cache</span>(<span style="color:#3E87E3;">p_key</span>)
<span style="color:#AEAEAE;font-style:italic;">      <span style="color:#AEAEAE;font-style:italic;">#</span> load content from cache</span>
      cached_content <span style="color:#E28964;">=</span> <span style="color:#3E87E3;"><span style="color:#3E87E3;">@@</span>CACHES</span>[p_key.<span style="color:#89BDFF;">to_sym</span>]
      <span style="color:#E28964;">return</span> <span style="color:#3387CC;">nil</span> <span style="color:#E28964;">if</span> cached_content.<span style="color:#89BDFF;">nil?</span>

<span style="color:#AEAEAE;font-style:italic;">      <span style="color:#AEAEAE;font-style:italic;">#</span> verify cache validity</span>
      <span style="color:#E28964;">return</span> cached_content.<span style="color:#89BDFF;">content</span> <span style="color:#E28964;">if</span> <span style="color:#E28964;">not</span> <span style="color:#89BDFF;">expired?</span>(cached_content)
      <span style="color:#E28964;">return</span> <span style="color:#3387CC;">nil</span>
    <span style="color:#E28964;">end</span>

<span style="color:#E28964;">private</span>
    <span style="color:#E28964;">def</span> <span style="color:#89BDFF;">self.expired?</span>(<span style="color:#3E87E3;">p_cache</span>)
<span style="color:#AEAEAE;font-style:italic;">      <span style="color:#AEAEAE;font-style:italic;">#</span> find time difference</span>
      time_difference <span style="color:#E28964;">=</span> <span style="color:#9B859D;">Time</span>.<span style="color:#89BDFF;">now</span> <span style="color:#E28964;">-</span> p_cache.<span style="color:#89BDFF;">created_on</span>
      <span style="color:#E28964;">return</span> <span style="color:#3387CC;">true</span> <span style="color:#E28964;">if</span> time_difference <span style="color:#E28964;">&gt;</span> p_cache.<span style="color:#89BDFF;">expire_time</span>
    <span style="color:#E28964;">end</span>
 <span style="color:#E28964;">end</span>
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