Class: JavaBuildpackUtils::Jre::Compile

Inherits:
Object
  • Object
show all
Defined in:
lib/java-buildpack-utils/jre/compile.rb

Overview

A class containing the functionality required to download and unpack a JRE for a user based on input from the user

Instance Method Summary collapse

Constructor Details

#initialize(app_dir, app_cache_dir) ⇒ Compile

Creates a new instance, passing in the application directory and application cache directories used during compilation

Parameters:

  • app_dir (String) —

    The application directory used during compilation

  • app_cache_dir (String) —

    The application cache directory used during compilation



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# File 'lib/java-buildpack-utils/jre/compile.rb', line 28

def initialize(app_dir, app_cache_dir)
  @app_dir = app_dir
  @global_cache = BuildpackUtils::GlobalCache.new
  @selected_jre = JavaBuildpackUtils::Jre::SelectedJre.new(app_dir)
end

Instance Method Details

#run ⇒ void

This method returns an undefined value.

The execution entry point for compilation. This method is responsible for downloading the correct version of Java and unpacking it to the application’s runtime directory.



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# File 'lib/java-buildpack-utils/jre/compile.rb', line 38

def run
  uri = @selected_jre.uri

  download_start_time = Time.now
  print "-----> Downloading #{@selected_jre.vendor} #{@selected_jre.version} JRE from #{uri} "
  @global_cache.get(@selected_jre.id, uri) do |file|
    puts "(#{(Time.now - download_start_time).duration})"

    expand_start_time = Time.now
    print "-----> Expanding JRE to #{JavaBuildpackUtils::Jre::JAVA_HOME} "

    absolute_java_home = File.join @app_dir, JavaBuildpackUtils::Jre::JAVA_HOME
    `rm -rf #{absolute_java_home}`
    `mkdir -p #{absolute_java_home}`
    `tar xzvf #{file.path} -C #{absolute_java_home} --strip 1 2>&1`
    puts "(#{(Time.now - expand_start_time).duration})"
  end
end