Class: RestCore::Cache
- Inherits:
-
Object
show all
- Includes:
- Middleware
- Defined in:
- lib/rest-core/middleware/cache.rb
Constant Summary
Constants included
from Middleware
Middleware::UNRESERVED
Constants included
from RestCore
ASYNC, CLIENT, DRY, FAIL, HIJACK, LOG, PROMISE, REQUEST_HEADERS, REQUEST_METHOD, REQUEST_PATH, REQUEST_PAYLOAD, REQUEST_QUERY, REQUEST_URI, RESPONSE_BODY, RESPONSE_HEADERS, RESPONSE_KEY, RESPONSE_SOCKET, RESPONSE_STATUS, Simple, TIMER, Universal, VERSION
Class Method Summary
collapse
Instance Method Summary
collapse
Methods included from Middleware
contain_binary?, #contain_binary?, escape, #escape, #fail, #id, included, #log, merge_hash, #merge_hash, #percent_encode, percent_encode, request_uri, #request_uri, #run, #string_keys, string_keys
Methods included from RestCore
eagerload, id
Constructor Details
#initialize(app, cache, expires_in, &block) ⇒ Cache
Returns a new instance of Cache.
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# File 'lib/rest-core/middleware/cache.rb', line 11
def initialize app, cache, expires_in, &block
super(&block)
@app, @cache, @expires_in = app, cache, expires_in
end
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Class Method Details
.members ⇒ Object
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# File 'lib/rest-core/middleware/cache.rb', line 8
def self.members; [:cache, :expires_in]; end
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Instance Method Details
#app_call(env) ⇒ Object
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# File 'lib/rest-core/middleware/cache.rb', line 29
def app_call env
app.call(env) do |res|
yield(if (res[FAIL] || []).empty?
cache_for(res)
else
res
end)
end
end
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#cache_get(env, &k) ⇒ Object
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# File 'lib/rest-core/middleware/cache.rb', line 44
def cache_get env, &k
return unless cache(env)
return unless cache_for?(env)
uri = request_uri(env)
start_time = Time.now
return unless data = cache(env)[cache_key(env)]
log(env, Event::CacheHit.new(Time.now - start_time, uri)).
merge((data, env.merge(REQUEST_URI => uri), k))
end
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#cache_key(env) ⇒ Object
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# File 'lib/rest-core/middleware/cache.rb', line 39
def cache_key env
"rest-core:cache:#{Digest::MD5.hexdigest(env['cache.key'] ||
cache_key_raw(env))}"
end
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#call(env, &k) ⇒ Object
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# File 'lib/rest-core/middleware/cache.rb', line 16
def call env, &k
e = if env['cache.update']
cache_clear(env)
else
env
end
cache_get(e){ |cached|
e[TIMER].cancel if e[TIMER]
k.call(cached)
} || app_call(e, &k)
end
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