Subclass of StreamUI that instantiates the user interaction using STDIN, STDOUT, and STDERR.
ConditionVariable
objects augment class Mutex
. Using condition variables, it is possible to suspend while in the middle of a critical section until a resource becomes available.
Example:
mutex = Thread::Mutex.new resource = Thread::ConditionVariable.new a = Thread.new { mutex.synchronize { # Thread 'a' now needs the resource resource.wait(mutex) # 'a' can now have the resource } } b = Thread.new { mutex.synchronize { # Thread 'b' has finished using the resource resource.signal } }
A specific resolution from a given {Resolver}
Delegates
all {Gem::Resolver::Molinillo::SpecificationProvider} methods to a ‘#specification_provider` property.
Raised when memory allocation fails.
Configuration for the openssl library.
Many system’s installation of openssl library will depend on your system configuration. See the value of OpenSSL::Config::DEFAULT_CONFIG_FILE
for the location of the file for your host.
General error for openssl library configuration files. Including formatting, parsing errors, etc.
Error raised when an error occurs on the underlying communication protocol.
Class
responsible for converting between an object and its id.
This, the default implementation, uses an object’s local ObjectSpace
__id__ as its id. This means that an object’s identification over drb remains valid only while that object instance remains alive within the server runtime.
For alternative mechanisms, see DRb::TimerIdConv
in drb/timeridconv.rb and DRbNameIdConv in sample/name.rb in the full drb distribution.
Class
handling the connection between a DRbObject
and the server the real object lives on.
This class maintains a pool of connections, to reduce the overhead of starting and closing down connections for each method call.
This class is used internally by DRbObject
. The user does not normally need to deal with it directly.
Class
responsible for converting between an object and its id.
This, the default implementation, uses an object’s local ObjectSpace
__id__ as its id. This means that an object’s identification over drb remains valid only while that object instance remains alive within the server runtime.
For alternative mechanisms, see DRb::TimerIdConv
in drb/timeridconv.rb and DRbNameIdConv in sample/name.rb in the full drb distribution.
Gateway id conversion forms a gateway between different DRb
protocols or networks.
The gateway needs to install this id conversion and create servers for each of the protocols or networks it will be a gateway between. It then needs to create a server that attaches to each of these networks. For example:
require 'drb/drb' require 'drb/unix' require 'drb/gw' DRb.install_id_conv DRb::GWIdConv.new gw = DRb::GW.new s1 = DRb::DRbServer.new 'drbunix:/path/to/gateway', gw s2 = DRb::DRbServer.new 'druby://example:10000', gw s1.thread.join s2.thread.join
Each client must register services with the gateway, for example:
DRb.start_service 'drbunix:', nil # an anonymous server gw = DRbObject.new nil, 'drbunix:/path/to/gateway' gw[:unix] = some_service DRb.thread.join
Timer id conversion keeps objects alive for a certain amount of time after their last access. The default time period is 600 seconds and can be changed upon initialization.
To use TimerIdConv:
DRb.install_id_conv TimerIdConv.new 60 # one minute
Gem::ConfigFile
RubyGems options and gem command options from gemrc.
gemrc is a YAML
file that uses strings to match gem command arguments and symbols to match RubyGems options.
Gem
command arguments use a String
key that matches the command name and allow you to specify default arguments:
install: --no-rdoc --no-ri update: --no-rdoc --no-ri
You can use gem:
to set default arguments for all commands.
RubyGems options use symbol keys. Valid options are:
:backtrace
See backtrace
:sources
Sets Gem::sources
:verbose
See verbose
:concurrent_downloads
gemrc files may exist in various locations and are read and merged in the following order:
system wide (/etc/gemrc)
per user (~/.gemrc)
per environment (gemrc files listed in the GEMRC environment variable)