[API] Added the "Upgrade Index" API

Author: karmi

elasticsearch-api/lib/elasticsearch/api/actions/indices/upgrade.rb

@@ -0,0 +1,38 @@
+module Elasticsearch
+  module API
+    module Indices
+      module Actions
+
+        # Upgrade the index or indices to the latest Lucene format.
+        #
+        # @option arguments [List] :index A comma-separated list of index names;
+        #                                 use `_all` or empty string to perform the operation on all indices
+        # @option arguments [Boolean] :ignore_unavailable Whether specified concrete indices should be ignored
+        #                                                 when unavailable (missing or closed)
+        # @option arguments [Boolean] :allow_no_indices Whether to ignore if a wildcard indices expression
+        #                                               resolves into no concrete indices.
+        # @option arguments [String] :expand_wildcards Whether to expand wildcard expression to concrete indices
+        #                                              that are open, closed or both. (options: open, closed)
+        # @option arguments [Boolean] :wait_for_completion Specify whether the request should block until the all
+        #                                                  segments are upgraded (default: true)
+        #
+        # @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/indices-upgrade.html
+        #
+        def upgrade(arguments={})
+          valid_params = [
+            :ignore_unavailable,
+            :allow_no_indices,
+            :expand_wildcards,
+            :wait_for_completion ]
+
+          method = 'POST'
+          path   = "_upgrade"
+          params = Utils.__validate_and_extract_params arguments, valid_params
+          body   = nil
+
+          perform_request(method, path, params, body).body
+        end
+      end
+    end
+  end
+end

elasticsearch-api/test/unit/indices/upgrade_test.rb

@@ -0,0 +1,26 @@
+require 'test_helper'
+
+module Elasticsearch
+  module Test
+    class IndicesUpgradeTest < ::Test::Unit::TestCase
+
+      context "Indices: Upgrade" do
+        subject { FakeClient.new }
+
+        should "perform correct request" do
+          subject.expects(:perform_request).with do |method, url, params, body|
+            assert_equal 'POST', method
+            assert_equal '_upgrade', url
+            assert_equal Hash.new, params
+            assert_nil   body
+            true
+          end.returns(FakeResponse.new)
+
+          subject.indices.upgrade
+        end
+
+      end
+
+    end
+  end
+end