![]() You may rely on EventMachine::Connection#receive_data to give you theĮxact data in the packet, with the original data length.Īlso observe that Connection#receive_data may be called with a If the remote peer sent you a datagram of a particular size, Is received on the socket, but unlike TCP sockets, the messageīoundaries of the received data will be respected. Socket, but there are some differences in how they behave.ĮventMachine::Connection#receive_data will be called when a datagram packet ![]() The normal callbacks (see start_server) willīe called as events of interest occur on the newly-created This method will create a new UDP (datagram) socket andīind it to the address and port that you specify. Its usage is similar to that of start_server. You can relayĭata from one kind to another, for example, feed a pipe from a UDP stream. Note also that this feature supports different types of descriptors: TCP, UDP, and pipes. After that, further incomingĭata will be passed into receive_data as normal. In the example, that proxy_target_unbound will be called when this occurs. Once you call this method, the 'from' connection will no longer get receive_data callbacks from the reactor,Įxcept in the case that 'to' connection has already closed when attempting to write to it. 'from' is the connection whose inbound data you want The two arguments are instance of Connection subclasses, 'from' and 'to'. Incurs a significant performance decrease. Propogating data from a server responseĪll the way up to Ruby, and then back down to the reactor to be sent back to the client, is often unnecessary and This is very efficient and especially useful for proxies where high performance is required. This method allows for direct writing of incoming data back out to another descriptor, at the C++ level in the reactor. Rescue block at that time, the exception could be handled improperly by the main thread. If the main thread is within an indiscriminate Will blow through to the main thread immediately. If an unhandled exception is raised by the deferred operation and an errback is not provided, it The threads within the EventMachine's thread pool have abort_on_exception set to true. The number of threads in its pool, so if you do this enough times, your subsequent deferred Not detect the problem, and the thread will never be returned to the pool. Also, multiple deferred operations may be running at once! Therefore, youĪre responsible for ensuring that your operation code is threadsafe.ĭon't write a deferred operation that will block forever. Thread from the main EventMachine processing and all other Ruby threads that may exist in Note carefully that the code in your deferred operation will be executed on a separate Will be allowed to blow through to the main thread immediately. "errback"), as part of its normal event handling loop. Unhandled exception, the exception will be passed to the third parameter to defer (the You don't need to execute any code after the operation completes. Operation block is passed as a parameter to the callback. Then, EventMachine calls the block specified in the second parameter toĭefer (the "callback"), as part of its normal event handling loop. When the operation completes, it will pass the result computed by the block (if any) back to theĮventMachine reactor. The action of defer is to take the block specified in the first parameter (the "operation")Īnd schedule it for asynchronous execution on an internal thread pool maintained by EventMachine. # to have them behave differently with respect to post_initīind_connect nil, nil, server, port, handler, * args, & blk endĮfer is used for integrating blocking operations into EventMachine's control flow. # are different from connected ones and we don't want # Don't change this lightly, because accepted connections ![]() # AFTER post_init has been called on the object, which I # way to do protocol-specific initiation. # presence of the post_init call, which happens in the # This leads us to an interesting choice because of the # Ok, added support for a user-defined block, 13Apr06. # It's expected that a considerable amount of code will depend # We return the newly-created anonymous-class object to the caller. # object to set up interfacing to other objects in the system. HOWEVER, it's often convenient to get the # It internally creates an object that should not be handled # server and sets up event-handling for the connection. connect server, port = nil, handler = nil, * args, & blk # EventMachine::connect initiates a TCP connection to a remote # File 'lib/eventmachine.rb', line 632 def self. A module or class that implements connection lifecycle callbacks
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