Support snappyer 2

.gitignore

@@ -8,6 +8,7 @@ kafka1
 kafka2
 kafka3
 doc
+.idea
 
 .elixir_ls
 cover

README.md

@@ -95,7 +95,7 @@ For more information on the v1.0 API, see
 The standard approach for adding dependencies to an Elixir application applies:
 add KafkaEx to the deps list in your project's mix.exs file.
 You may also optionally add
-[snappy-erlang-nif](https://github.com/fdmanana/snappy-erlang-nif) (required
+[snappyer](https://hex.pm/packages/snappyer) (required
 only if you want to use snappy compression).
 
 ```elixir
@@ -107,8 +107,10 @@ defmodule MyApp.Mixfile do
     [
       # add to your existing deps
       {:kafka_ex, "~> 0.11"},
-      # if using snappy compression
+      # If using snappy-erlang-nif (snappy) compression
       {:snappy, git: "https://github.com/fdmanana/snappy-erlang-nif"}
+      # if using snappyer (snappy) compression
+      {:snappyer, "~> 1.2"}
     ]
   end
 end
@@ -457,3 +459,13 @@ an invite via [http://bit.ly/slackelixir](http://bit.ly/slackelixir).
 The Slack channel is appropriate for quick questions or general design
 discussions.  The Slack discussion is archived at
 [http://slack.elixirhq.com/kafkaex](http://slack.elixirhq.com/kafkaex).
+
+## default snappy algorithm use snappy-erlang-nif package
+
+It can be changed to snappyer by using this:
+
+``` elixir
+config :kafka_ex, snappy_module: :snappyer
+```
+
+Snappy erlang nif is deprecated and will be changed to :snappyer in 1.0.0 release.

config/config.exs

@@ -65,6 +65,8 @@ config :kafka_ex,
     certfile: File.cwd!() <> "/ssl/cert.pem",
     keyfile: File.cwd!() <> "/ssl/key.pem"
   ],
+
+  snappy_module: :snappy,
   # set this to the version of the kafka broker that you are using
   # include only major.minor.patch versions.  must be at least 0.8.0
   # use "kayrock" for the new client

config/test.exs

@@ -2,8 +2,9 @@ use Mix.Config
 
 config :ex_unit, capture_log: is_nil(System.get_env("SHOW_LOGS"))
 
-config :kafka_ex,
-  sync_timeout: 60_000
+config :kafka_ex, snappy_module: :snappy
+
+config :kafka_ex, sync_timeout: 60_000
 
 # Help debug tests that are tricky to understand
 config :logger, :console,

lib/kafka_ex/compression.ex

@@ -41,7 +41,7 @@ defmodule KafkaEx.Compression do
   """
   @spec compress(compression_type_t, binary) :: {binary, attribute_t}
   def compress(:snappy, data) do
-    {:ok, compressed_data} = :snappy.compress(data)
+    {:ok, compressed_data} = snappy_module().compress(data)
     {compressed_data, @snappy_attribute}
   end
 
@@ -58,7 +58,11 @@ defmodule KafkaEx.Compression do
         <<valsize::32-unsigned, value::size(valsize)-binary, rest::binary>>,
         so_far
       ) do
-    {:ok, decompressed_value} = :snappy.decompress(value)
+    {:ok, decompressed_value} = snappy_module().decompress(value)
     snappy_decompress_chunk(rest, so_far <> decompressed_value)
   end
+
+  defp snappy_module do
+    Application.get_env(:kafka_ex, :snappy_module, :snappy)
+  end
 end

mix.exs

@@ -44,8 +44,8 @@ defmodule KafkaEx.Mixfile do
       {:credo, "~> 1.1", only: [:dev, :test], runtime: false},
       {:dialyxir, "~> 1.0.0-rc.3", only: :dev, runtime: false},
       {:excoveralls, "~> 0.7", only: :test, runtime: false},
-      {:snappy,
-       git: "https://github.com/fdmanana/snappy-erlang-nif", only: [:dev, :test]}
+      {:snappy, git: "https://github.com/fdmanana/snappy-erlang-nif", only: [:dev, :test]},
+      {:snappyer, "~> 1.2", only: [:dev, :test]}
     ]
 
     # we need a newer version of ex_doc, but it will cause problems on older

mix.lock

@@ -24,4 +24,5 @@
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.5", "6eaf7ad16cb568bb01753dbbd7a95ff8b91c7979482b95f38443fe2c8852a79b", [:make, :mix, :rebar3], [], "hexpm", "13104d7897e38ed7f044c4de953a6c28597d1c952075eb2e328bc6d6f2bfc496"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.4.1", "d869e4c68901dd9531385bb0c8c40444ebf624e60b6962d95952775cac5e90cd", [:rebar3], [], "hexpm", "1d1848c40487cdb0b30e8ed975e34e025860c02e419cb615d255849f3427439d"},
   "varint": {:hex, :varint, "1.2.0", "61bffd9dcc2d5242d59f75694506b4d4013bb103f6a23e34b94f89cebb0c1ab3", [:mix], [], "hexpm", "d94941ed8b9d1a5fdede9103a5e52035bd0aaf35081d44e67713a36799927e47"},
+  "snappyer": {:hex, :snappyer, "1.2.8", "201ce9067a33c71a6a5087c0c3a49a010b17112d461e6df696c722dcb6d0934a", [:rebar3], [], "hexpm", "35518e79a28548b56d8fd6aee2f565f12f51c2d3d053f9cfa817c83be88c4f3d"},
 }

test/compression_test.exs

@@ -14,6 +14,12 @@ defmodule CompressionTest do
       <<0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 3, 246, 10, 44, 16, 236, 0, 0, 255, 255,
         255, 255, 0, 0, 3, 232>> <> String.duplicate("ABCDEFGHIJ", 100)
 
+    ## enable :snappy module, and test it
+    Application.put_env(:kafka_ex, :snappy_module, :snappy)
+    assert expected == KafkaEx.Compression.decompress(2, data)
+
+    ## enable :snappyer module, and test it
+    Application.put_env(:kafka_ex, :snappy_module, :snappyer)
     assert expected == KafkaEx.Compression.decompress(2, data)
   end
 end