Adding discovery document caching to Service interface
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0d7b3d040f
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@ -18,6 +18,7 @@ require 'google/api_client/service/resource'
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require 'google/api_client/service/request'
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require 'google/api_client/service/request'
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require 'google/api_client/service/result'
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require 'google/api_client/service/result'
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require 'google/api_client/service/batch'
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require 'google/api_client/service/batch'
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require 'google/api_client/service/simple_file_store'
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module Google
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module Google
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class APIClient
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class APIClient
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@ -33,6 +34,8 @@ module Google
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include Google::APIClient::Service::StubGenerator
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include Google::APIClient::Service::StubGenerator
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extend Forwardable
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extend Forwardable
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DEFAULT_CACHE_FILE = 'discovery.cache'
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# Cache for discovered APIs.
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# Cache for discovered APIs.
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@@discovered = {}
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@@discovered = {}
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@ -81,6 +84,10 @@ module Google
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# `true` if gzip enabled, `false` otherwise.
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# `true` if gzip enabled, `false` otherwise.
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# @option options [Faraday::Connection] :connection
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# @option options [Faraday::Connection] :connection
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# A custom connection to be used for all requests.
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# A custom connection to be used for all requests.
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# @option options [ActiveSupport::Cache::Store, :default] :discovery_cache
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# A cache store to place the discovery documents for loaded APIs.
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# Avoids unnecessary roundtrips to the discovery service.
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# :default loads the default local file cache store.
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def initialize(api_name, api_version, options = {})
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def initialize(api_name, api_version, options = {})
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@api_name = api_name.to_s
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@api_name = api_name.to_s
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if api_version.nil?
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if api_version.nil?
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@ -109,11 +116,32 @@ module Google
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@options = options
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@options = options
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# Cache discovered APIs in memory.
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# Initialize cache store. Default to SimpleFileStore if :cache_store
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# is not provided and we have write permissions.
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if options.include? :cache_store
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@cache_store = options[:cache_store]
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else
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cache_exists = File.exist?(DEFAULT_CACHE_FILE)
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if (cache_exists && File.writable?(DEFAULT_CACHE_FILE)) ||
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(!cache_exists && File.writable?(Dir.pwd))
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@cache_store = Google::APIClient::Service::SimpleFileStore.new(
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DEFAULT_CACHE_FILE)
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end
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end
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# Attempt to read API definition from memory cache.
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# Not thread-safe, but the worst that can happen is a cache miss.
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# Not thread-safe, but the worst that can happen is a cache miss.
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unless @api = @@discovered[[api_name, api_version]]
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unless @api = @@discovered[[api_name, api_version]]
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@@discovered[[api_name, api_version]] = @api = @client.discovered_api(
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# Attempt to read API definition from cache store, if there is one.
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api_name, api_version)
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# If there's a miss or no cache store, call discovery service.
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if !@cache_store.nil?
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@api = @cache_store.fetch("%s/%s" % [api_name, api_version]) do
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@client.discovered_api(api_name, api_version)
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end
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else
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@api = @client.discovered_api(api_name, api_version)
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end
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@@discovered[[api_name, api_version]] = @api
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end
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end
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generate_call_stubs(self, @api)
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generate_call_stubs(self, @api)
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@ -151,6 +179,16 @@ module Google
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# @return [Faraday::Connection]
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# @return [Faraday::Connection]
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attr_accessor :connection
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attr_accessor :connection
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##
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# The cache store used for storing discovery documents.
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# If the user requested :default, use SimpleFileStore with default file
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# name.
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#
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# @return [ActiveSupport::Cache::Store,
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# Google::APIClient::Service::SimpleFileStore,
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# nil]
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attr_reader :cache_store
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##
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##
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# Prepares a Google::APIClient::BatchRequest object to make batched calls.
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# Prepares a Google::APIClient::BatchRequest object to make batched calls.
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# @param [Array] calls
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# @param [Array] calls
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@ -0,0 +1,151 @@
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# Copyright 2013 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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module Google
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class APIClient
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class Service
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# Simple file store to be used in the event no ActiveSupport cache store
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# is provided. This is not thread-safe, and does not support a number of
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# features (such as expiration), but it's useful for the simple purpose of
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# caching discovery documents to disk.
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# Implements the basic cache methods of ActiveSupport::Cache::Store in a
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# limited fashion.
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class SimpleFileStore
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# Creates a new SimpleFileStore.
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#
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# @param [String] file_path
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# The path to the cache file on disk.
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# @param [Object] options
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# The options to be used with this SimpleFileStore. Not implemented.
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def initialize(file_path, options = nil)
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@file_path = file_path.to_s
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end
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# Returns true if a key exists in the cache.
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#
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# @param [String] name
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# The name of the key. Will always be converted to a string.
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# @param [Object] options
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# The options to be used with this query. Not implemented.
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def exist?(name, options = nil)
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read_file
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@cache.nil? ? nil : @cache.include?(name.to_s)
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end
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# Fetches data from the cache and returns it, using the given key.
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# If the key is missing and no block is passed, returns nil.
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# If the key is missing and a block is passed, executes the block, sets
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# the key to its value, and returns it.
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#
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# @param [String] name
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# The name of the key. Will always be converted to a string.
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# @param [Object] options
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# The options to be used with this query. Not implemented.
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# @yield [String]
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# optional block with the default value if the key is missing
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def fetch(name, options = nil)
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read_file
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if block_given?
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entry = read(name.to_s, options)
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if entry.nil?
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value = yield name.to_s
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write(name.to_s, value)
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return value
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else
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return entry
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end
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else
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return read(name.to_s, options)
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end
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end
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# Fetches data from the cache, using the given key.
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# Returns nil if the key is missing.
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#
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# @param [String] name
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# The name of the key. Will always be converted to a string.
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# @param [Object] options
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# The options to be used with this query. Not implemented.
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def read(name, options = nil)
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read_file
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@cache.nil? ? nil : @cache[name.to_s]
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end
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# Writes the value to the cache, with the key.
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#
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# @param [String] name
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# The name of the key. Will always be converted to a string.
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# @param [Object] value
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# The value to be written.
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# @param [Object] options
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# The options to be used with this query. Not implemented.
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def write(name, value, options = nil)
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read_file
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@cache = {} if @cache.nil?
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@cache[name.to_s] = value
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write_file
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return nil
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end
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# Deletes an entry in the cache.
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# Returns true if an entry is deleted.
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#
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# @param [String] name
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# The name of the key. Will always be converted to a string.
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# @param [Object] options
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# The options to be used with this query. Not implemented.
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def delete(name, options = nil)
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read_file
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return nil if @cache.nil?
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if @cache.include? name.to_s
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@cache.delete name.to_s
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write_file
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return true
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else
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return nil
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end
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end
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protected
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# Read the entire cache file from disk.
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# Will avoid reading if there have been no changes.
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def read_file
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if !File.exists? @file_path
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@cache = nil
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else
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# Check for changes after our last read or write.
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if @last_change.nil? || File.mtime(@file_path) > @last_change
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File.open(@file_path) do |file|
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@cache = Marshal.load(file)
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@last_change = file.mtime
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end
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end
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end
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return @cache
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end
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# Write the entire cache contents to disk.
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def write_file
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File.open(@file_path, 'w') do |file|
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Marshal.dump(@cache, file)
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end
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@last_change = File.mtime(@file_path)
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end
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end
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end
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end
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end
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@ -57,7 +57,8 @@ describe Google::APIClient::Service do
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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@ -76,7 +77,8 @@ describe Google::APIClient::Service do
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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req = adsense.adunits.list(:adClientId => '1').execute()
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req = adsense.adunits.list(:adClientId => '1').execute()
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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req = adsense.accounts.adclients.list(:accountId => '1').execute()
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req = adsense.accounts.adclients.list(:accountId => '1').execute()
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@ -102,7 +105,7 @@ describe Google::APIClient::Service do
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describe 'with no connection' do
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describe 'with no connection' do
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before do
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before do
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@adsense = Google::APIClient::Service.new('adsense', 'v1.3',
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@adsense = Google::APIClient::Service.new('adsense', 'v1.3',
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{:application_name => APPLICATION_NAME})
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{:application_name => APPLICATION_NAME, :cache_store => nil})
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end
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end
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it 'should return a resource when using a valid resource name' do
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it 'should return a resource when using a valid resource name' do
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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req = prediction.trainedmodels.insert(:project => '1').body({'id' => '1'}).execute()
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req = prediction.trainedmodels.insert(:project => '1').body({'id' => '1'}).execute()
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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req = prediction.trainedmodels.insert(:project => '1').body('{"id":"1"}').execute()
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req = prediction.trainedmodels.insert(:project => '1').body('{"id":"1"}').execute()
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describe 'with no connection' do
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describe 'with no connection' do
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before do
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before do
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@prediction = Google::APIClient::Service.new('prediction', 'v1.5',
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@prediction = Google::APIClient::Service.new('prediction', 'v1.5',
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{:application_name => APPLICATION_NAME})
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{:application_name => APPLICATION_NAME, :cache_store => nil})
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end
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end
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it 'should return a valid request with a body' do
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it 'should return a valid request with a body' do
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{
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{
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:application_name => APPLICATION_NAME,
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:application_name => APPLICATION_NAME,
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:authenticated => false,
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:authenticated => false,
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:connection => conn
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:connection => conn,
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:cache_store => nil
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}
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}
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)
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)
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req = drive.files.insert(:uploadType => 'multipart').body(@metadata).media(@media).execute()
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req = drive.files.insert(:uploadType => 'multipart').body(@metadata).media(@media).execute()
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describe 'with no connection' do
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describe 'with no connection' do
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before do
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before do
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@drive = Google::APIClient::Service.new('drive', 'v1',
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@drive = Google::APIClient::Service.new('drive', 'v1',
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{:application_name => APPLICATION_NAME})
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{:application_name => APPLICATION_NAME, :cache_store => nil})
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end
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end
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it 'should return a valid request with a body and media upload' do
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it 'should return a valid request with a body and media upload' do
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describe 'with the Discovery API' do
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describe 'with the Discovery API' do
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it 'should make a valid end-to-end request' do
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it 'should make a valid end-to-end request' do
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discovery = Google::APIClient::Service.new('discovery', 'v1',
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discovery = Google::APIClient::Service.new('discovery', 'v1',
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{:application_name => APPLICATION_NAME, :authenticated => false})
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{:application_name => APPLICATION_NAME, :authenticated => false,
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:cache_store => nil})
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result = discovery.apis.get_rest(:api => 'discovery', :version => 'v1').execute
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result = discovery.apis.get_rest(:api => 'discovery', :version => 'v1').execute
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result.should_not be_nil
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result.should_not be_nil
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result.data.name.should == 'discovery'
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result.data.name.should == 'discovery'
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@ -280,7 +287,7 @@ describe Google::APIClient::Service::Result do
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describe 'with the plus API' do
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describe 'with the plus API' do
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before do
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before do
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@plus = Google::APIClient::Service.new('plus', 'v1',
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@plus = Google::APIClient::Service.new('plus', 'v1',
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{:application_name => APPLICATION_NAME})
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{:application_name => APPLICATION_NAME, :cache_store => nil})
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@reference = Google::APIClient::Reference.new({
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@reference = Google::APIClient::Reference.new({
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:api_method => @plus.activities.list.method,
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:api_method => @plus.activities.list.method,
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:parameters => {
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:parameters => {
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@ -478,7 +485,8 @@ describe Google::APIClient::Service::BatchRequest do
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describe 'with the discovery API' do
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describe 'with the discovery API' do
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before do
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before do
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@discovery = Google::APIClient::Service.new('discovery', 'v1',
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@discovery = Google::APIClient::Service.new('discovery', 'v1',
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{:application_name => APPLICATION_NAME, :authorization => nil})
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{:application_name => APPLICATION_NAME, :authorization => nil,
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:cache_store => nil})
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end
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end
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||||||
|
|
||||||
describe 'with two valid requests' do
|
describe 'with two valid requests' do
|
||||||
|
|
|
@ -0,0 +1,137 @@
|
||||||
|
# encoding:utf-8
|
||||||
|
|
||||||
|
# Copyright 2013 Google Inc.
|
||||||
|
#
|
||||||
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
# you may not use this file except in compliance with the License.
|
||||||
|
# You may obtain a copy of the License at
|
||||||
|
#
|
||||||
|
# http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
#
|
||||||
|
# Unless required by applicable law or agreed to in writing, software
|
||||||
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
# See the License for the specific language governing permissions and
|
||||||
|
# limitations under the License.
|
||||||
|
|
||||||
|
require 'spec_helper'
|
||||||
|
|
||||||
|
require 'google/api_client/service/simple_file_store'
|
||||||
|
|
||||||
|
describe Google::APIClient::Service::SimpleFileStore do
|
||||||
|
|
||||||
|
FILE_NAME = 'test.cache'
|
||||||
|
|
||||||
|
before(:all) do
|
||||||
|
File.delete(FILE_NAME) if File.exists?(FILE_NAME)
|
||||||
|
end
|
||||||
|
|
||||||
|
describe 'with no cache file' do
|
||||||
|
before(:each) do
|
||||||
|
File.delete(FILE_NAME) if File.exists?(FILE_NAME)
|
||||||
|
@cache = Google::APIClient::Service::SimpleFileStore.new(FILE_NAME)
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil when asked if a key exists' do
|
||||||
|
@cache.exist?('invalid').should be_nil
|
||||||
|
File.exists?(FILE_NAME).should be_false
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil when asked to read a key' do
|
||||||
|
@cache.read('invalid').should be_nil
|
||||||
|
File.exists?(FILE_NAME).should be_false
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil when asked to fetch a key' do
|
||||||
|
@cache.fetch('invalid').should be_nil
|
||||||
|
File.exists?(FILE_NAME).should be_false
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should create a cache file when asked to fetch a key with a default' do
|
||||||
|
@cache.fetch('new_key') do
|
||||||
|
'value'
|
||||||
|
end.should == 'value'
|
||||||
|
File.exists?(FILE_NAME).should be_true
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should create a cache file when asked to write a key' do
|
||||||
|
@cache.write('new_key', 'value')
|
||||||
|
File.exists?(FILE_NAME).should be_true
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil when asked to delete a key' do
|
||||||
|
@cache.delete('invalid').should be_nil
|
||||||
|
File.exists?(FILE_NAME).should be_false
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
describe 'with an existing cache' do
|
||||||
|
before(:each) do
|
||||||
|
File.delete(FILE_NAME) if File.exists?(FILE_NAME)
|
||||||
|
@cache = Google::APIClient::Service::SimpleFileStore.new(FILE_NAME)
|
||||||
|
@cache.write('existing_key', 'existing_value')
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return true when asked if an existing key exists' do
|
||||||
|
@cache.exist?('existing_key').should be_true
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return false when asked if a nonexistent key exists' do
|
||||||
|
@cache.exist?('invalid').should be_false
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return the value for an existing key when asked to read it' do
|
||||||
|
@cache.read('existing_key').should == 'existing_value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil for a nonexistent key when asked to read it' do
|
||||||
|
@cache.read('invalid').should be_nil
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return the value for an existing key when asked to read it' do
|
||||||
|
@cache.read('existing_key').should == 'existing_value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return nil for a nonexistent key when asked to fetch it' do
|
||||||
|
@cache.fetch('invalid').should be_nil
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return and save the default value for a nonexistent key when asked to fetch it with a default' do
|
||||||
|
@cache.fetch('new_key') do
|
||||||
|
'value'
|
||||||
|
end.should == 'value'
|
||||||
|
@cache.read('new_key').should == 'value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should remove an existing value and return true when asked to delete it' do
|
||||||
|
@cache.delete('existing_key').should be_true
|
||||||
|
@cache.read('existing_key').should be_nil
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should return false when asked to delete a nonexistent key' do
|
||||||
|
@cache.delete('invalid').should be_false
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should convert keys to strings when storing them' do
|
||||||
|
@cache.write(:symbol_key, 'value')
|
||||||
|
@cache.read('symbol_key').should == 'value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should convert keys to strings when reading them' do
|
||||||
|
@cache.read(:existing_key).should == 'existing_value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should convert keys to strings when fetching them' do
|
||||||
|
@cache.fetch(:existing_key).should == 'existing_value'
|
||||||
|
end
|
||||||
|
|
||||||
|
it 'should convert keys to strings when deleting them' do
|
||||||
|
@cache.delete(:existing_key).should be_true
|
||||||
|
@cache.read('existing_key').should be_nil
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
after(:all) do
|
||||||
|
File.delete(FILE_NAME) if File.exists?(FILE_NAME)
|
||||||
|
end
|
||||||
|
end
|
Loading…
Reference in New Issue