rubinius-compatible; ref.gem. README: INIT_TRANSACTION
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README.md
25
README.md
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@ -23,21 +23,22 @@ First, open environment and database
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require 'sbdb'
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require 'sbdb'
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Dir.mkdir 'newenv' rescue Errno::EEXIST
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Dir.mkdir 'newenv' rescue Errno::EEXIST
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env = SBDB::Env.new 'newenv', SBDB::CREATE
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env = SBDB::Env.new 'newenv', SBDB::CREATE | SBDB::Env::INIT_TRANSACTION
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db = env.open SBDB::Btree, 'newdb.db', :flags => SBDB::CREATE
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db = env.btree 'newdb.db', :flags => SBDB::CREATE
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It works nearly like a Ruby-Hash:
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It works nearly like a Ruby-Hash:
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db['key'] = 'value'
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db['key'] = 'value'
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db['key'] # => 'value'
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db['key'] # => 'value'
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db.to_hash # => {'key'=>'value'}
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db.to_hash # => {'key'=>'value'}
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db.map {|k, v| [k, v].join ' => '} # => ["key => value"]
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db.map {|k, v| "k => v" } # => ["key => value"]
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db.count # => 1
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db.count # => 1
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db.each {|k,v| puts "#{k}: #{v}" }
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SBDB::DB#each uses a SBDB::Cursor:
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`SBDB::DB#each` uses a `SBDB::Cursor`:
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cursor = db.cursor
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cursor = db.cursor
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cursor.each {|k,v| puts "#{k}: ${v}" }
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cursor.each {|k,v| puts "#{k}: #{v}" }
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**Don't forget to close everything, you've opened!**
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**Don't forget to close everything, you've opened!**
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@ -47,10 +48,14 @@ SBDB::DB#each uses a SBDB::Cursor:
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But you can use a *lambda* to ensure to close everything:
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But you can use a *lambda* to ensure to close everything:
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SBDB::Env.new( 'newenv', SBDB::CREATE) do |env|
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SBDB::Env.new( 'newenv', SBDB::CREATE | SBDB::Env::INIT_TRANSACTION) do |env|
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env.open SBDB::Btree, 'newdb.db', :flags => SBDB::CREATE do |db|
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env.open SBDB::Btree, 'newdb.db', :flags => SBDB::CREATE do |db|
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db.to_hash
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db.to_hash
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end
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end
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end
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end
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SBDB::DB#to_hash creates a cursor and close it later.
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`SBDB::DB#to_hash` creates a cursor and close it later.
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Tip:
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Signal.trap 'EXIT', env.method( :close)
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1
Rakefile
1
Rakefile
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@ -15,6 +15,7 @@ begin
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gem.files = %w[AUTHORS README.md VERSION lib/**/*.rb test/**/*.rb]
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gem.files = %w[AUTHORS README.md VERSION lib/**/*.rb test/**/*.rb]
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gem.require_paths = %w[lib]
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gem.require_paths = %w[lib]
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gem.add_dependency 'bdb'
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gem.add_dependency 'bdb'
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gem.add_dependency 'ref'
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end
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end
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Jeweler::GemcutterTasks.new
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Jeweler::GemcutterTasks.new
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rescue LoadError
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rescue LoadError
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@ -1,4 +1,5 @@
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require 'bdb'
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require 'bdb'
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require 'ref'
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require 'sbdb/environment'
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require 'sbdb/environment'
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require 'sbdb/db'
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require 'sbdb/db'
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require 'sbdb/cursor'
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require 'sbdb/cursor'
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