Class: KatteHiveAutodep::HDP

Inherits:
Object
  • Object
show all
Defined in:
lib/katte_hive_autodep/hdp.rb

Constant Summary collapse

EXT_LIB_ROOT =

wrapper class for hive-dependency-parser

File.expand_path("../../ext/", __FILE__)
ENV_SCRIPT = 
File.join(EXT_LIB_ROOT, (ENV["KATTE_MODE"] == 'test' ? "env-debug.sh" : "env.sh"))
HDP_JAR = 
File.join(EXT_LIB_ROOT, "hive-dependency-parser.jar")
HDP_MAIN_CLASS = 
"org.mixi.analysis.hive.dependency.parser.Driver"

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HDP

Returns a new instance of HDP.



12
13
 
# File 'lib/katte_hive_autodep/hdp.rb', line 12

def initialize
end

Instance Method Details

#run(file) ⇒ Object 



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/katte_hive_autodep/hdp.rb', line 15

def run(file)
  return unless File.file? file

  dependency = IO.pipe do |o_r,o_w|
    ret = system(<<EOF, :out => o_w, :err => "/dev/null")
source #{ENV_SCRIPT}
CLASSPATH=$CLASSPATH:#{HDP_JAR} java -Xmx256m #{HDP_MAIN_CLASS} #{file}
EOF

    return unless ret

    o_w.close
    o_r.to_a.join
  end

  JSON.parse(dependency)
end