initial commit

Author: mdoi

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+*.bundle
+*.so
+*.o
+*.a
+mkmf.log

ChangeLog

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+Release 0.1.0 - 2014/10/22
+
+  * First commit

Gemfile

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+source 'https://rubygems.org'
+
+gemspec

LICENSE.txt

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+Copyright (c) 2014 Masayuki DOI
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Fluent::Plugin::Dynamodb::Add
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'fluent-plugin-dynamodb-add'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install fluent-plugin-dynamodb-add
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/[my-github-username]/fluent-plugin-dynamodb-add/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+

VERSION

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+0.1.0

fluent-plugin-dynamodb-add.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+
+Gem::Specification.new do |spec|
+  spec.name          = "fluent-plugin-dynamodb-add"
+  spec.authors       = ["Masayuki DOI"]
+  spec.email         = ["[email protected]"]
+  spec.description   = "Amazon DynamoDB atomic add plugin"
+  spec.summary       = spec.description
+  spec.homepage      = "https://github.com/mdoi/fluent-plugin-dynamodb-add"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_dependency "fluentd", "~> 0.10.0"
+  spec.add_dependency "aws-sdk", ">= 1.56.0"
+end

lib/fluent/plugin/out_dynamodb_add.rb

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+module Fluent
+  class DynamodbAdd < Fluent::Output
+    Fluent::Plugin.register_output('dynamodb_add', self)
+
+    unless method_defined?(:log)
+      define_method(:log) { $log }
+    end
+
+    config_param :count_key, :string
+    config_param :dynamo_count_key, :string
+    config_param :table_name, :string
+    config_param :use_iam_role, :bool, :default => false
+    config_param :aws_key_id, :string, :default => nil
+    config_param :aws_sec_key, :string, :default => nil
+    config_param :endpoint, :string, :default => nil
+    config_param :hash_key, :string, :default => nil
+    config_param :hash_key_delimiter, :string, :default => ":"
+    config_param :range_key, :string, :default => nil
+
+    def initialize
+      super
+      require 'aws-sdk'
+    end
+
+    def configure(conf)
+      super
+
+      unless use_iam_role
+        [:aws_key_id, :aws_sec_key].each do |name|
+          unless self.instance_variable_get("@#{name}")
+            raise ConfigError, "'#{name}' is required"
+          end
+        end
+      end
+      @hash_key = hash_key.split(/\s*,\s*/)
+    end
+
+    def start
+      super
+      if use_iam_role
+        AWS.config(:credential_provider => AWS::Core::CredentialProviders::EC2Provider.new)
+      else
+        AWS.config(:access_key_id => @aws_key_id, :secret_access_key => @aws_sec_key)
+      end
+
+      AWS.config(:dynamo_db_endpoint => @endpoint) if @endpoint
+
+      @dynamo_db = AWS::DynamoDB.new
+      @table = @dynamo_db.tables[table_name]
+      @table.load_schema
+    end
+
+    def emit(tag, es, chain)
+      es.each do |time, record|
+        hash_key = create_key(record)
+        next unless hash_key || record[@count_key]
+
+        if @range_key
+          next unless record[@range_key]
+          item = @table.items[hash_key, record[@range_key]]
+        else
+          item = @table.items[hash_key]
+        end
+        item.attributes.update {|u| u.add @dynamo_count_key => record[@count_key] }
+      end
+    end
+
+    private
+    def create_key(record)
+      key_array = []
+      @hash_key.each do |h|
+        return nil unless record[h]
+        key_array << record[h]
+      end
+      key_array.join(@hash_key_delimiter)
+    end
+  end
+end