Deprecating regexp field for LOGSTASH-756

- Deprecating fields to columns
- Deprecating regexp fields to source
- Adding target for sub field specifcation
- Added and modified rspec checks

lib/logstash/filters/csv.rb

@@ -14,32 +14,65 @@ class LogStash::Filters::CSV < LogStash::Filters::Base
   # The CSV data in the value of the source field will be expanded into a
   # datastructure in the "dest" field.  Note: if the "dest" field
   # already exists, it will be overridden.
-  config /[A-Za-z0-9_-]+/, :validate => :string
+  config /[A-Za-z0-9_-]+/, :validate => :string, :deprecated => true
 
   # Define a list of field names (in the order they appear in the CSV,
   # as if it were a header line). If this is not specified or there
   # are not enough fields specified, the default field name is "fieldN"
   # (where N is the field number, starting from 1).
   # Optional.
-  config :fields, :validate => :array, :default => []
+  config :fields, :validate => :array, :deprecated => true
+
+  # The CSV data in the value of the source field will be expanded into a
+  # datastructure.
+  # This deprecates the regexp '[A-Za-z0-9_-]' variable.
+  config :source, :validate => :string
+
+  # Define a list of field names (in the order they appear in the CSV,
+  # as if it were a header line). If this is not specified or there
+  # are not enough fields specified, the default field name is "fieldN"
+  # (where N is the field number, starting from 1).
+  # This deprecates the 'fields' variable.
+  # Optional.
+  config :columns, :validate => :array, :default => []
 
   # Define the column separator value. If this is not specified the default
   # is a comma ','
   # Optional.
   config :separator, :validate => :string, :default => ","
 
+  # Define target for placing the data
+  # Defaults to @fields
+  # Optional
+  config :target, :validate => :string, :default => "@fields"
+
   public
   def register
-    @csv = {}
 
+    #TODO(electrical): At some point 'fields' and the regexp parts need to be removed.
+    if @fields
+      if @columns
+        @logger.error("'fields' and 'columns' are the same setting, but 'fields' is deprecated. Please use only 'columns'")
+      end
+      @columns = @fields
+    end
+
+    @csv = {}
+    #TODO(electrical): At some point this can be removed
     @config.each do |field, dest|
-      next if (RESERVED + ["fields", "separator"]).member?(field)
+      next if (RESERVED + ["fields", "separator", "source", "columns", "target"]).member?(field)
       @csv[field] = dest
     end
 
-    # Default to parsing @message and dumping into @fields
+    #TODO(electrical): Will we make @source required or not?
+    if @source
+      #Add the source field to the list.
+      @csv[@source] = @target
+    end
+
+    # Default to parsing @message and dumping into @target
     if @csv.empty?
-      @csv["@message"] = "@fields"
+      @csv["@message"] = @target
     end
   end # def register
 
@@ -50,6 +83,7 @@ class LogStash::Filters::CSV < LogStash::Filters::Base
     @logger.debug("Running csv filter", :event => event)
 
     matches = 0
+    #TODO(electrical): When old stuff can be removed. this block will need to be changed also
     @csv.each do |key, dest|
       if event[key]
         if event[key].is_a?(String)
@@ -68,7 +102,7 @@ class LogStash::Filters::CSV < LogStash::Filters::Base
           values = CSV.parse_line(raw, {:col_sep => @separator})
           data = {}
           values.each_index do |i|
-            field_name = @fields[i] || "field#{i+1}"
+            field_name = @columns[i] || "column#{i+1}"
             data[field_name] = values[i]
           end
 

spec/filters/csv.rb

@@ -14,13 +14,28 @@ describe LogStash::Filters::CSV do
     CONFIG
 
     sample "big,bird,sesame street" do
-      insist { subject["field1"] } == "big"
-      insist { subject["field2"] } == "bird"
-      insist { subject["field3"] } == "sesame street"
+      insist { subject["column1"] } == "big"
+      insist { subject["column2"] } == "bird"
+      insist { subject["column3"] } == "sesame street"
     end
   end
 
-  describe "given fields" do
+  describe "custom separator" do
+    config <<-CONFIG
+      filter {
+        csv {
+          separator => ";"
+        }
+      }
+    CONFIG
+
+    sample "big,bird;sesame street" do
+      insist { subject["column1"] } == "big,bird"
+      insist { subject["column2"] } == "sesame street"
+    end
+  end
+
+  describe "given fields ( deprecated test )" do
     # The logstash config goes here.
     # At this time, only filters are supported.
     config <<-CONFIG
@@ -38,22 +53,7 @@ describe LogStash::Filters::CSV do
     end
   end
 
-  describe "custom separator" do
-    config <<-CONFIG
-      filter {
-        csv {
-          separator => ";"
-        }
-      }
-    CONFIG
-
-    sample "big,bird;sesame street" do
-      insist { subject["field1"] } == "big,bird"
-      insist { subject["field2"] } == "sesame street"
-    end
-  end
-
-  describe "parse csv with more data than defined field names" do
+  describe "parse csv with more data than defined field names ( deprecated test )" do
     config <<-CONFIG
       filter {
         csv {
@@ -65,11 +65,11 @@ describe LogStash::Filters::CSV do
     sample "val1,val2,val3" do
       insist { subject["custom1"] } == "val1"
       insist { subject["custom2"] } == "val2"
-      insist { subject["field3"] } == "val3"
+      insist { subject["column3"] } == "val3"
     end
   end
 
-  describe "parse csv from a given field without field names" do
+  describe "parse csv from a given field without field names ( deprecated test )" do
     config <<-CONFIG
       filter {
         csv {
@@ -79,13 +79,13 @@ describe LogStash::Filters::CSV do
     CONFIG
 
     sample({"@fields" => {"raw" => "val1,val2,val3"}}) do
-      insist { subject["data"]["field1"] } == "val1"
-      insist { subject["data"]["field2"] } == "val2"
-      insist { subject["data"]["field3"] } == "val3"
+      insist { subject["data"]["column1"] } == "val1"
+      insist { subject["data"]["column2"] } == "val2"
+      insist { subject["data"]["column3"] } == "val3"
     end
   end
 
-  describe "parse csv from a given field with field names" do
+  describe "parse csv from a given field with field names ( deprecated test )" do
     config <<-CONFIG
       filter {
         csv {
@@ -102,7 +102,7 @@ describe LogStash::Filters::CSV do
     end
   end
 
-  describe "fail to parse any data in a multi-value field" do
+  describe "fail to parse any data in a multi-value field ( deprecated test )" do
     config <<-CONFIG
       filter {
         csv {
@@ -115,4 +115,113 @@ describe LogStash::Filters::CSV do
       insist { subject["data"] } == nil
     end
   end
+
+
+  # New tests
+
+  describe "fail to parse any data in a multi-value field ( deprecated test )" do
+    config <<-CONFIG
+      filter {
+        csv {
+          source => "datain"
+          target => "data"
+        }
+      }
+    CONFIG
+
+    sample({"@fields" => {"datain" => ["val1,val2,val3", "val1,val2,val3"]}}) do
+      insist { subject["data"] } == nil
+    end
+  end
+
+  describe "given columns" do
+    # The logstash config goes here.
+    # At this time, only filters are supported.
+    config <<-CONFIG
+      filter {
+        csv {
+          columns => ["first", "last", "address" ]
+        }
+      }
+    CONFIG
+
+    sample "big,bird,sesame street" do
+      insist { subject["first"] } == "big"
+      insist { subject["last"] } == "bird"
+      insist { subject["address"] } == "sesame street"
+    end
+  end
+
+  describe "parse csv with more data than defined column names" do
+    config <<-CONFIG
+      filter {
+        csv {
+          columns => ["custom1", "custom2"]
+        }
+      }
+    CONFIG
+
+    sample "val1,val2,val3" do
+      insist { subject["custom1"] } == "val1"
+      insist { subject["custom2"] } == "val2"
+      insist { subject["column3"] } == "val3"
+    end
+  end
+
+
+  describe "parse csv from a given source with column names" do
+    config <<-CONFIG
+      filter {
+        csv {
+          source => "datafield"
+          columns => ["custom1", "custom2", "custom3"]
+        }
+      }
+    CONFIG
+
+    sample({"@fields" => {"datafield" => "val1,val2,val3"}}) do
+      insist { subject["custom1"] } == "val1"
+      insist { subject["custom2"] } == "val2"
+      insist { subject["custom3"] } == "val3"
+    end
+  end
+
+  describe "given target" do
+    # The logstash config goes here.
+    # At this time, only filters are supported.
+    config <<-CONFIG
+      filter {
+        csv {
+          target => "data"
+        }
+      }
+    CONFIG
+
+    sample "big,bird,sesame street" do
+      insist { subject["data"]["column1"] } == "big"
+      insist { subject["data"]["column2"] } == "bird"
+      insist { subject["data"]["column3"] } == "sesame street"
+    end
+  end
+
+  describe "given target and source" do
+    # The logstash config goes here.
+    # At this time, only filters are supported.
+    config <<-CONFIG
+      filter {
+        csv {
+          source => "datain"
+          target => "data"
+        }
+      }
+    CONFIG
+
+    sample({"@fields" => {"datain" => "big,bird,sesame street"}}) do
+      insist { subject["data"]["column1"] } == "big"
+      insist { subject["data"]["column2"] } == "bird"
+      insist { subject["data"]["column3"] } == "sesame street"
+    end
+  end
+
+
 end