Class: DRb::DRbSSHServerConn
- Inherits:
-
Object
- Object
- DRb::DRbSSHServerConn
- Defined in:
- lib/drbssh.rb
Overview
DRbSSH protocol server per-connection class. Handles client-to-client communications by utilizing thread-safe Queue’s for the input and output, and by adding a small ‘rep’ or ‘req’ packet before sending, so we can have two-way DRb duplexed over a single pair of filedescriptors.
Instance Attribute Summary collapse
-
#uri ⇒ Object
readonly
Returns the value of attribute uri.
Instance Method Summary collapse
-
#close ⇒ Object
Delegate shutdown to client.
-
#initialize(uri, config, client) ⇒ DRbSSHServerConn
constructor
Create a new server-connection for the specified
client
. -
#recv_request ⇒ Object
Wait for a request to appear on the request-queue.
-
#send_reply(succ, result) ⇒ Object
Queue client-reply.
Constructor Details
#initialize(uri, config, client) ⇒ DRbSSHServerConn
Create a new server-connection for the specified client
.
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# File 'lib/drbssh.rb', line 208 def initialize(uri, config, client) @uri = uri @client = client @srv_requestq = Queue.new msg = DRbMessage.new(config) # Read-thread Thread.new do # Read from client, and delegate request/reply to the correct place. begin loop do type = msg.load(client.read_fd) if type == 'req' @srv_requestq.push(msg.recv_request(client.read_fd)) else client.receiveq.push(msg.recv_reply(client.read_fd)) end end rescue client.receiveq.push($!) @srv_requestq.push($!) end end # Write-thread Thread.new do # Wait for outgoing data on send queue, and add header-packet before # writing. begin loop do type, data = client.sendq.pop client.write_fd.write(msg.dump(type)) if type == 'req' msg.send_request(client.write_fd, *data) else msg.send_reply(client.write_fd, *data) end end rescue client.receiveq.push($!) @srv_requestq.push($!) end end end |
Instance Attribute Details
#uri ⇒ Object (readonly)
Returns the value of attribute uri.
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# File 'lib/drbssh.rb', line 205 def uri @uri end |
Instance Method Details
#close ⇒ Object
Delegate shutdown to client.
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# File 'lib/drbssh.rb', line 257 def close return unless @client.alive? Timeout::timeout(15) do sleep 0.1 until @client.sendq.empty? end rescue nil @client.close end |
#recv_request ⇒ Object
Wait for a request to appear on the request-queue
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# File 'lib/drbssh.rb', line 268 def recv_request reply = @srv_requestq.pop if reply.is_a? Exception self.close raise reply else reply end end |
#send_reply(succ, result) ⇒ Object
Queue client-reply
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# File 'lib/drbssh.rb', line 279 def send_reply(succ, result) @client.sendq.push(['rep', [succ, result]]) end |