Class: CephRuby::RadosObject

Inherits:
Object
  • Object
show all
Defined in:
lib/ceph-ruby/rados_object.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pool, name) ⇒ RadosObject

Returns a new instance of RadosObject.



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# File 'lib/ceph-ruby/rados_object.rb', line 5

def initialize(pool, name)
  self.pool = pool
  self.name = name
  if block_given?
    yield(self)
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/ceph-ruby/rados_object.rb', line 3

def name
  @name
end

#pool ⇒ Object

Returns the value of attribute pool.



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# File 'lib/ceph-ruby/rados_object.rb', line 3

def pool
  @pool
end

Instance Method Details

#destroy ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/ceph-ruby/rados_object.rb', line 36

def destroy
  log("destroy")
  ret = Lib::Rados.rados_remove(pool.handle, name)
  raise SystemCallError.new("destroy of '#{name}' failed", -ret) if ret < 0
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ceph-ruby/rados_object.rb', line 13

def exists?
  log("exists?")
  !!stat
rescue SystemCallError => e
  return false if e.errno == Errno::ENOENT::Errno
  raise e
end

#log(message) ⇒ Object

helper methods below



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# File 'lib/ceph-ruby/rados_object.rb', line 66

def log(message)
  CephRuby.log("rados object #{pool.name}/#{name} #{message}")
end

#read(offset, size) ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/ceph-ruby/rados_object.rb', line 28

def read(offset, size)
  log("read offset #{offset}, size #{size}")
  data_p = FFI::MemoryPointer.new(:char, size)
  ret = Lib::Rados.rados_read(pool.handle, name, data_p, size, offset)
  raise SystemCallError.new("read of #{size} bytes from '#{name}' at #{offset} failed", -ret) if ret < 0
  data_p.get_bytes(0, ret)
end

#resize(size) ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/ceph-ruby/rados_object.rb', line 42

def resize(size)
  log("resize size #{size}")
  ret = Lib::Rados.rados_trunc(pool.handle, name, size)
  raise SystemCallError.new("resize of '#{name}' to #{size} failed", -ret) if ret < 0
end

#size ⇒ Object 



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# File 'lib/ceph-ruby/rados_object.rb', line 60

def size
  stat[:size]
end

#stat ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/ceph-ruby/rados_object.rb', line 48

def stat
  log("stat")
  size_p = FFI::MemoryPointer.new(:uint64)
  mtime_p = FFI::MemoryPointer.new(:uint64)
  ret = Lib::Rados.rados_stat(pool.handle, name, size_p, mtime_p)
  raise SystemCallError.new("stat of '#{name}' failed", -ret) if ret < 0
  {
    :size => size_p.get_uint64(0),
    :mtime => Time.at(mtime_p.get_uint64(0)),
  }
end

#write(offset, data) ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/ceph-ruby/rados_object.rb', line 21

def write(offset, data)
  size = data.bytesize
  log("write offset #{offset}, size #{size}")
  ret = Lib::Rados.rados_write(pool.handle, name, data, size, offset)
  raise SystemCallError.new("write of #{size} bytes to '#{name}' at #{offset} failed", -ret) if ret < 0
end