57 lines
1.1 KiB
Ruby
57 lines
1.1 KiB
Ruby
# Discourse specific cache, enforces 1 day expiry
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class Cache < ActiveSupport::Cache::Store
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# nothing is cached for longer than 1 day EVER
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# there is no reason to have data older than this clogging redis
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# it is dangerous cause if we rename keys we will be stuck with
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# pointless data
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MAX_CACHE_AGE = 1.day unless defined? MAX_CACHE_AGE
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def initialize(opts = {})
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@namespace = opts[:namespace] || "_CACHE_"
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super(opts)
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end
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def redis
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$redis
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end
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def reconnect
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redis.reconnect
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end
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def clear
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redis.keys("#{@namespace}:*").each do |k|
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redis.del(k)
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end
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end
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def namespaced_key(key, opts=nil)
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"#{@namespace}:" << key
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end
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protected
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def read_entry(key, options)
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if data = redis.get(key)
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data = Marshal.load(data)
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ActiveSupport::Cache::Entry.new data
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end
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rescue
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# corrupt cache, fail silently for now, remove rescue later
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end
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def write_entry(key, entry, options)
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dumped = Marshal.dump(entry.value)
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expiry = options[:expires_in] || MAX_CACHE_AGE
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redis.setex(key, expiry, dumped)
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true
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end
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def delete_entry(key, options)
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redis.del key
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end
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end
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