akka.remote.transport
Class AbstractTransportAdapter

java.lang.Object
  extended by akka.remote.transport.AbstractTransportAdapter
All Implemented Interfaces:
SchemeAugmenter, Transport
Direct Known Subclasses:
ActorTransportAdapter, FailureInjectorTransportAdapter

public abstract class AbstractTransportAdapter
extends java.lang.Object
implements Transport, SchemeAugmenter

An adapter that wraps a transport and provides interception


Nested Class Summary
 
Nested classes/interfaces inherited from interface akka.remote.transport.Transport
Transport.ActorAssociationEventListener, Transport.ActorAssociationEventListener$, Transport.AssociationEvent, Transport.AssociationEventListener, Transport.InboundAssociation, Transport.InboundAssociation$, Transport.InvalidAssociationException, Transport.InvalidAssociationException$
 
Constructor Summary
AbstractTransportAdapter(Transport wrappedTransport, scala.concurrent.ExecutionContext ec)
           
 
Method Summary
 scala.concurrent.Future<AssociationHandle> associate(Address remoteAddress)
          Asynchronously opens a logical duplex link between two Transport Entities over a network.
 scala.concurrent.ExecutionContext ec()
           
protected abstract  void interceptAssociate(Address remoteAddress, scala.concurrent.Promise<AssociationHandle> statusPromise)
           
protected abstract  scala.concurrent.Future<Transport.AssociationEventListener> interceptListen(Address listenAddress, scala.concurrent.Future<Transport.AssociationEventListener> listenerFuture)
           
 boolean isResponsibleFor(Address address)
          A function that decides whether the specific transport instance is responsible for delivering to a given address.
 scala.concurrent.Future<scala.Tuple2<Address,scala.concurrent.Promise<Transport.AssociationEventListener>>> listen()
          Asynchronously attempts to setup the transport layer to listen and accept incoming associations.
protected abstract  int maximumOverhead()
           
 int maximumPayloadBytes()
          Defines the maximum size of payload this transport is able to deliver.
 java.lang.String schemeIdentifier()
          Returns a string that will be used as the scheme part of the URLs corresponding to this transport
 scala.concurrent.Future<java.lang.Object> shutdown()
          Shuts down the transport layer and releases all the corresponding resources.
protected  Transport wrappedTransport()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface akka.remote.transport.Transport
managementCommand
 
Methods inherited from interface akka.remote.transport.SchemeAugmenter
addedSchemeIdentifier, augmentScheme, augmentScheme, removeScheme, removeScheme
 

Constructor Detail

AbstractTransportAdapter

public AbstractTransportAdapter(Transport wrappedTransport,
                                scala.concurrent.ExecutionContext ec)
Method Detail

wrappedTransport

protected Transport wrappedTransport()

ec

public scala.concurrent.ExecutionContext ec()

maximumOverhead

protected abstract int maximumOverhead()

interceptListen

protected abstract scala.concurrent.Future<Transport.AssociationEventListener> interceptListen(Address listenAddress,
                                                                                               scala.concurrent.Future<Transport.AssociationEventListener> listenerFuture)

interceptAssociate

protected abstract void interceptAssociate(Address remoteAddress,
                                           scala.concurrent.Promise<AssociationHandle> statusPromise)

schemeIdentifier

public java.lang.String schemeIdentifier()
Description copied from interface: Transport
Returns a string that will be used as the scheme part of the URLs corresponding to this transport

Specified by:
schemeIdentifier in interface Transport
Returns:
the scheme string

isResponsibleFor

public boolean isResponsibleFor(Address address)
Description copied from interface: Transport
A function that decides whether the specific transport instance is responsible for delivering to a given address. The function must be thread-safe and non-blocking.

The purpose of this function is to resolve cases when the scheme part of an URL is not enough to resolve the correct transport i.e. multiple instances of the same transport implementation are loaded. These cases arise when - the same transport, but with different configurations is used for different remote systems - a transport is able to serve one address only (hardware protocols, e.g. Serial port) and multiple instances are needed to be loaded for different endpoints.

Specified by:
isResponsibleFor in interface Transport
Parameters:
address - (undocumented)
Returns:
whether the transport instance is responsible to serve communications to the given address.

maximumPayloadBytes

public int maximumPayloadBytes()
Description copied from interface: Transport
Defines the maximum size of payload this transport is able to deliver. All transports MUST support at least 32kBytes (32000 octets) of payload, but some MAY support larger sizes.

Specified by:
maximumPayloadBytes in interface Transport
Returns:

listen

public scala.concurrent.Future<scala.Tuple2<Address,scala.concurrent.Promise<Transport.AssociationEventListener>>> listen()
Description copied from interface: Transport
Asynchronously attempts to setup the transport layer to listen and accept incoming associations. The result of the attempt is wrapped by a Future returned by this method. The pair contained in the future contains a Promise for an ActorRef. By completing this Promise with an Transport.AssociationEventListener, that listener becomes responsible for handling incoming associations. Until the Promise is not completed, no associations are processed.

Specified by:
listen in interface Transport
Returns:
A Future containing a pair of the bound local address and a Promise of an AssociationListener that must be completed by the consumer of the future.

associate

public scala.concurrent.Future<AssociationHandle> associate(Address remoteAddress)
Description copied from interface: Transport
Asynchronously opens a logical duplex link between two Transport Entities over a network. It could be backed by a real transport-layer connection (TCP), more lightweight connections provided over datagram protocols (UDP with additional services), substreams of multiplexed connections (SCTP) or physical links (serial port).

This call returns a future of an AssociationHandle. A failed future indicates that the association attempt was unsuccessful. If the exception is Transport.InvalidAssociationException then the association request was invalid, and it is impossible to recover.

Specified by:
associate in interface Transport
Parameters:
remoteAddress - The address of the remote transport entity.
Returns:
A status instance representing failure or a success containing an AssociationHandle

shutdown

public scala.concurrent.Future<java.lang.Object> shutdown()
Description copied from interface: Transport
Shuts down the transport layer and releases all the corresponding resources. Shutdown is asynchronous signalling the end of the shutdown by completing the returned future.

The transport SHOULD try flushing pending writes before becoming completely closed.

Specified by:
shutdown in interface Transport
Returns:
Future signalling the completion of shutdown