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undefined method `to_msgpack' for 2015-01-27 19:23:49 UTC:Java::OrgJruby::RubyTime

See original GitHub issue

Embulk version: 0.8.38 and 0.9.1

Original report is here, but I think this is embulk’s problem.

I tried following step with ruby-filter, but I got an exception “undefined method `to_msgpack’ for 2015-01-27 19:23:49 UTC:Java::OrgJruby::RubyTime”

mkdir work
cd work
embulk example
embulk guess */seed.yml -o config.yml
embulk new ruby-filter sample

cat <<END >> config.yml
filters:
    - type: sample
      option1: 1
END

embulk -I./embulk-filter-sample/lib preview config.yml

I got a following exception:

org.jruby.exceptions.RaiseException: (NoMethodError) undefined method `to_msgpack' for 2015-01-27 19:23:49 UTC:Java::OrgJruby::RubyTime
        at RUBY.set(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/page_builder.rb:21)
        at RUBY.add(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/page_builder.rb:53)
        at RUBY.block in add(/Users/koji/work/work/embulk-filter-sample/lib/embulk/filter/sample.rb:40)
        at RUBY.each(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/page.rb:22)
        at RUBY.add(/Users/koji/work/work/embulk-filter-sample/lib/embulk/filter/sample.rb:39)
        at RUBY.add(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/filter_plugin.rb:78)
        at RUBY.block in transaction(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/filter_plugin.rb:54)
        at RUBY.transaction(/Users/koji/work/work/embulk-filter-sample/lib/embulk/filter/sample.rb:23)
        at RUBY.transaction(uri:classloader:/gems/embulk-0.9.1-java/lib/embulk/filter_plugin.rb:51)

This is because embulk pass the Java::OrgJruby::RubyTime object instead of Time object.

If I apply following patch to embulk, this problem is solved.

patch is here:

--- embulk-0.9.1/gems/embulk-0.9.1-java/lib/embulk/schema.rb.orig       2018-02-11 11:14:24.000000000 +0900
+++ embulk-0.9.1/gems/embulk-0.9.1-java/lib/embulk/schema.rb    2018-02-11 11:14:46.000000000 +0900
@@ -36,7 +36,7 @@
             # Constructor of `org.jruby.RubyTime` requires `org.joda.time.DateTime`.
             # http://jruby.org/apidocs/org/jruby/RubyTime.html#RubyTime(org.jruby.Ruby,%20org.jruby.RubyClass,%20org.joda.time.DateTime)
             # TODO: Replace `RubyTime.new` to `RubyTime.newTime`.
-            "record << (java_timestamp = reader.getTimestamp(#{idx}); ruby_time = Java::org.jruby.RubyTime.new(JRuby.runtime, JRuby.runtime.getClass('Time'), Java::org.joda.time.DateTime.new(java_timestamp.toEpochMilli())).gmtime().to_java(Java::org.jruby.RubyTime); ruby_time.setNSec(java_timestamp.getNano()); ruby_time)"
+            "record << (java_timestamp = reader.getTimestamp(#{idx}); ruby_time = Java::org.jruby.RubyTime.new(JRuby.runtime, JRuby.runtime.getClass('Time'), Java::org.joda.time.DateTime.new(java_timestamp.toEpochMilli())).gmtime().to_java(Java::org.jruby.RubyTime); ruby_time.setNSec(java_timestamp.getNano()); ruby_time.gmtime)"
           when :json
             "record << MessagePack.unpack(String.from_java_bytes((::Java::org.msgpack.core.MessagePack.newDefaultBufferPacker()).packValue(reader.getJson(#{idx})).toMessageBuffer().toByteArray()))"
           else

unzip -d embulk-0.9.1 ~/.embulk/bin/embulk
patch embulk-0.9.1/gems/embulk-0.9.1-java/lib/embulk/schema.rb above.patch
java -classpath ./embulk-0.9.1 org.embulk.cli.Main -I./embulk-filter-sample/lib preview config.yml

+---------+--------------+-------------------------+-------------------------+----------------------------+----------------+-------------+--------------+
| id:long | account:long |          time:timestamp |      purchase:timestamp |             comment:string | example:string | column:long | value:double |
+---------+--------------+-------------------------+-------------------------+----------------------------+----------------+-------------+--------------+
|       1 |       32,864 | 2015-01-27 19:23:49 UTC | 2015-01-27 00:00:00 UTC |                     embulk |        example |           1 |          1.0 |
|       2 |       14,824 | 2015-01-27 19:01:23 UTC | 2015-01-27 00:00:00 UTC |               embulk jruby |        example |           1 |          1.0 |
|       3 |       27,559 | 2015-01-28 02:20:02 UTC | 2015-01-28 00:00:00 UTC | Embulk "csv" parser plugin |        example |           1 |          1.0 |
|       4 |       11,270 | 2015-01-29 11:54:36 UTC | 2015-01-29 00:00:00 UTC |                            |        example |           1 |          1.0 |
+---------+--------------+-------------------------+-------------------------+----------------------------+----------------+-------------+--------------+