twisted.spread.pb.Broker

Package twisted :: Package spread :: Module pb :: Class Broker

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Class Broker

       Ephemeral --+    
                   |    
BaseProtocol --+   |    
               |   |    
        Protocol --+    
                   |    
              Banana --+
                       |
                      Broker

I am a broker for objects.

Method Summary
	`__init__(self, isClient, security)`
	`cachedLocallyAs(self, cid)`
	`cachedRemotelyAs(self, instance, incref)` Returns an ID that says what this instance is cached as remotely, or `None` if it's not.
	`cacheLocally(self, cid, instance)` (internal)
	`cacheRemotely(self, instance)` XXX
	`connectionFailed(self)`
	`connectionLost(self, reason)` The connection was lost.
	`connectionReady(self)` Initialize.
	`decCacheRef(self, objectID)` (internal) Send a DECACHE directive.
	`dontNotifyOnDisconnect(self, notifier)` Remove a callback from list of disconnect callbacks.
	`expressionReceived(self, sexp)` Evaluate an expression as it's received.
	`localObjectForID(self, luid)` Get a local object for a locally unique ID.
	`newLocalID(self)` Generate a new LUID.
	`newRequestID(self)` Generate a new request ID.
	`notifyOnConnect(self, notifier)` Call the given callback when the Broker connects.
	`notifyOnDisconnect(self, notifier)` Call the given callback when the Broker disconnects.
	`notifyOnFail(self, notifier)` Call the given callback if the Broker fails to connect.
	`pauseProducing(self)`
	`proto_answer(self, requestID, netResult)` (internal) Got an answer to a previously sent message.
	`proto_cachemessage(self, requestID, objectID, message, answerRequired, netArgs, netKw)`
	`proto_decache(self, objectID)` (internal) Decrement the reference count of a cached object.
	`proto_decref(self, objectID)` (internal) Decrement the reference count of an object.
	`proto_didNotUnderstand(self, command)` Respond to stock '`didNotUnderstand`' message.
	`proto_error(self, requestID, fail)` (internal) Deal with an error.
	`proto_message(self, requestID, objectID, message, answerRequired, netArgs, netKw)`
	`proto_uncache(self, objectID)` (internal) Tell the client it is now OK to uncache an object.
	`proto_version(self, vnum)` Protocol message: (version version-number)
	`registerPageProducer(self, pager)`
	`registerReference(self, object)` Get an ID for a local object.
	`remoteForName(self, name)` Returns an object from the remote name mapping.
	`remotelyCachedForLUID(self, luid)` Returns an instance which is cached remotely, with this LUID.
	`resumeProducing(self)` Called when the consumer attached to me runs out of buffer.
	`sendCall(self, *exp)` Utility method to send an expression to the other side of the connection.
	`sendDecRef(self, objectID)` (internal) Send a DECREF directive.
	`serialize(self, object, perspective, method, args, kw)` Jelly an object according to the remote security rules for this broker.
	`setNameForLocal(self, name, object)` Store a special (string) ID for this object.
	`stopProducing(self)`
	`unserialize(self, sexp, perspective)` Unjelly an sexp according to the local security rules for this broker.
	`_recvMessage(self, findObjMethod, requestID, objectID, message, answerRequired, netArgs, netKw)` Received a message-send.
	`_sendAnswer(self, netResult, requestID)` (internal) Send an answer to a previously sent message.
	`_sendError(self, fail, requestID)` (internal) Send an error for a previously sent message.
	`_sendFailure(self, fail, requestID)` Log error and then send it.
	`_sendFailureOrError(self, fail, requestID)` Call `_sendError` or `_sendFailure`, depending on whether `fail` represents an `Error` subclass or not.
	`_sendMessage(self, prefix, perspective, objectID, message, args, kw)`
Inherited from `Banana`: `callExpressionReceived`, `connectionMade`, `dataReceived`, `gotItem`, `sendEncoded`, `setPrefixLimit`, `_encode`, `_selectDialect` Inherited from `BaseProtocol`: `makeConnection` Inherited from `Ephemeral`: `__getstate__`, `__setstate__`

Class Variable Summary
`NoneType`	`factory` = None
`int`	`maxBrokerRefsViolations` = 0
`NoneType`	`username` = None
`int`	`version` = 6
`NoneType`	`waitingForAnswers` = None
Inherited from `Banana`: `buffer`, `incomingVocabulary`, `k`, `knownDialects`, `outgoingVocabulary`, `prefixLimit`, `sizeLimit`, `v` Inherited from `Protocol`: `__implemented__`, `__provides__` Inherited from `BaseProtocol`: `__providedBy__`, `connected`, `transport`

Method Details

cachedRemotelyAs(self, instance, incref=0)

Returns an ID that says what this instance is cached as remotely, or None if it's not.

cacheLocally(self, cid, instance)

(internal)

Store a non-filled-out cached instance locally.

cacheRemotely(self, instance)

XXX

connectionLost(self, reason)

The connection was lost.

Overrides:: twisted.internet.protocol.Protocol.connectionLost

connectionReady(self)

Initialize. Called after Banana negotiation is done.

Overrides:: twisted.spread.banana.Banana.connectionReady

decCacheRef(self, objectID)

(internal) Send a DECACHE directive.

dontNotifyOnDisconnect(self, notifier)

Remove a callback from list of disconnect callbacks.

expressionReceived(self, sexp)

Evaluate an expression as it's received.

Overrides:: twisted.spread.banana.Banana.expressionReceived

localObjectForID(self, luid)

Get a local object for a locally unique ID.

I will return an object previously stored with self.registerReference, or None if XXX:Unfinished thought:XXX

newLocalID(self)

Generate a new LUID.

newRequestID(self)

Generate a new request ID.

notifyOnConnect(self, notifier)

Call the given callback when the Broker connects.

notifyOnDisconnect(self, notifier)

Call the given callback when the Broker disconnects.

notifyOnFail(self, notifier)

Call the given callback if the Broker fails to connect.

proto_answer(self, requestID, netResult)

(internal) Got an answer to a previously sent message.

Look up the appropriate callback and call it.

proto_decache(self, objectID)

(internal) Decrement the reference count of a cached object.

If the reference count is zero, free the reference, then send an 'uncached' directive.

proto_decref(self, objectID)

(internal) Decrement the reference count of an object.

If the reference count is zero, it will free the reference to this object.

proto_didNotUnderstand(self, command)

Respond to stock 'didNotUnderstand' message.

Log the command that was not understood and continue. (Note: this will probably be changed to close the connection or raise an exception in the future.)

proto_error(self, requestID, fail)

(internal) Deal with an error.

proto_uncache(self, objectID)

(internal) Tell the client it is now OK to uncache an object.

proto_version(self, vnum)

Protocol message: (version version-number)

Check to make sure that both ends of the protocol are speaking the same version dialect.

registerReference(self, object)

Get an ID for a local object.

Store a persistent reference to a local object and map its id() to a generated, session-unique ID and return that ID.

remoteForName(self, name)

Returns an object from the remote name mapping.

Note that this does not check the validity of the name, only creates a translucent reference for it.

remotelyCachedForLUID(self, luid)

Returns an instance which is cached remotely, with this LUID.

resumeProducing(self)

Called when the consumer attached to me runs out of buffer.

sendCall(self, *exp)

Utility method to send an expression to the other side of the connection.

sendDecRef(self, objectID)

(internal) Send a DECREF directive.

serialize(self, object, perspective=None, method=None, args=None, kw=None)

Jelly an object according to the remote security rules for this broker.

setNameForLocal(self, name, object)

Store a special (string) ID for this object.

This is how you specify a 'base' set of objects that the remote protocol can connect to.

unserialize(self, sexp, perspective=None)

Unjelly an sexp according to the local security rules for this broker.

_recvMessage(self, findObjMethod, requestID, objectID, message, answerRequired, netArgs, netKw)

Received a message-send.

Look up message based on object, unserialize the arguments, and invoke it with args, and send an 'answer' or 'error' response.

_sendAnswer(self, netResult, requestID)

(internal) Send an answer to a previously sent message.

_sendError(self, fail, requestID)

(internal) Send an error for a previously sent message.

_sendFailure(self, fail, requestID)

Log error and then send it.

_sendFailureOrError(self, fail, requestID)

Call _sendError or _sendFailure, depending on whether fail represents an Error subclass or not.

Class Variable Details

factory

Type:: NoneType
Value:: None

maxBrokerRefsViolations

Type:: int
Value:: 0

username

Type:: NoneType
Value:: None

version

Type:: int
Value:: 6

waitingForAnswers

Type:: NoneType
Value:: None

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