Module: BDBXML

Included in:
Persist
Defined in:
lib/models/modbdbxml.rb

Constant Summary collapse

DB_ROOT = 
db_path
DB_NAME = 
APP_CONFIG['dbcontainer']

Instance Method Summary collapse

Instance Method Details

#clean_env ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 42

def clean_env
  puts "\nVERSION of BDB is #{BDB::VERSION}\n"
  puts "\nVERSION of BDB::XML is #{BDB::XML::VERSION}\n"
  puts "Cleaning #{DB_ROOT}/#{DB_NAME}\n"
  
  Dir.foreach(DB_ROOT) do |x|
    if FileTest.file?(DB_ROOT+"/#{x}")
       File.unlink(DB_ROOT+"/#{x}")
    end
  end
end

#close_env ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 54

def close_env
  $man.close
  $env.close
end

#create_doc(msg, key) ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 69

def create_doc(msg,key)
  $man.begin($con) do |txn, con|
    a = $man.create_document
    a.content = msg
    con[key] = a
    txn.commit
  end
end

#create_key_and_doc(msg) ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 59

def create_key_and_doc(msg)
  key = UUID.new
  create_doc(msg,key)
  key
end

#find(query) ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 87

def find(query)
  cxt = $man.create_query_context()
  results = $man.query(query, cxt)
  if (results.size == 0) then
    return nil
  end
  #results is essentially an array of result lines
  #a single result will span a number of output lines, e.g. outer joined
  #MTA info will appear with a CRLF separator
  #the following code makes up single logical result rows based on the lines between
  #successive pairs of {} braces
  #
  #it should be noted that the result set from the xqueries is intended to be
  #a valid ruby block
  #this allows the result to be used to instantiate an active record object
  #with no further manipulation required
  rows = []
  i = 0
  results.each do |r|
    if rows[i] == nil
      rows[i] = ""
    end
    r = r.to_s
    rows[i] << r.chomp
    if (r.match(']}'))
      i = i + 1
    end
  end
  rows
end

#read_doc(key) ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 65

def read_doc(key)
  $con.get(key).content
end

#replace_doc(msg, key) ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 78

def replace_doc(msg,key)
  $man.begin($con) do |txn, con|
    a = $con.get(key)
    a.content = msg
    $con.update(a)
    txn.commit
  end
end

#setup_env ⇒ Object 



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# File 'lib/models/modbdbxml.rb', line 12

def setup_env
  puts "VERSION of BDB is #{BDB::VERSION}\n"
  puts "VERSION of BDB::XML is #{BDB::XML::VERSION}\n"
  puts "Database path is #{File.expand_path(DB_ROOT)}\n"
  
  #setup UUID state file
  UUID.config(:state_file => "#{DB_ROOT}/uuid.state",
                :sequence => rand(0x100000000),
                :mac_addr => '00:19:e3:36:60:f5')
              
  @flag = BDB::INIT_TRANSACTION
  @flag ||= BDB::INIT_LOMP
  $env = BDB::Env.new(DB_ROOT, BDB::CREATE | @flag)
  $man = $env.manager
  if (!File.exist?("#{DB_ROOT}/#{DB_NAME}"))
    if (@flag & BDB::INIT_TXN) != 0
       $con = $man.create_container(DB_NAME, BDB::XML::TRANSACTIONAL)
    else
       $con = $man.create_container(DB_NAME)
    end
  else
    if (@flag & BDB::INIT_TXN) != 0
       $con = $man.open_container(DB_NAME, BDB::XML::TRANSACTIONAL)
    else
       $con = $man.open_container(DB_NAME)
    end
  end
  $base = "."
end