From 34787a58d35d2605a85556c6eeca38f0c16b8f70 Mon Sep 17 00:00:00 2001
From: Pascal Betz <pascal.betz@simplificator.com>
Date: Wed, 1 May 2013 18:50:59 +0200
Subject: [PATCH] + Example on how to bypass cache
---
examples/cache_bypass.rb | 48 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 examples/cache_bypass.rb
diff --git a/examples/cache_bypass.rb b/examples/cache_bypass.rb
new file mode 100644
index 00000000..29668744
--- /dev/null
+++ b/examples/cache_bypass.rb
@@ -0,0 +1,48 @@
+# This class allows you to configure how Geocoder should treat errors that occur when
+# the cache is not available.
+# Configure it like this
+# config/initializers/geocoder.rb
+# Geocoder.configure(
+# :cache => Geocoder::CacheBypass.new(Redis.new)
+# )
+#
+# Depending on the value of @bypass this will either
+# raise the exception (true) or swallow it and pretend the cache did not return a hit (false)
+#
+class Geocoder::CacheBypass
+ def initialize(target, bypass = true)
+ @target = target
+ @bypass = bypass
+ end
+
+
+ def [](key)
+ with_bypass { @target[key] }
+ end
+
+ def []=(key, value)
+ with_bypass(value) { @target[key] = value }
+ end
+
+ def keys
+ with_bypass([]) { @target.keys }
+ end
+
+ def del(key)
+ with_bypass { @target.del(key)
+ end
+
+ private
+
+ def with_bypass(return_value_if_exception = nil, &block)
+ begin
+ yield
+ rescue
+ if @bypass
+ return_value_if_exception
+ else
+ raise # reraise original exception
+ end
+ end
+ end
+end
\ No newline at end of file
--
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