Fountain master and slave nodes

Files
file	Hostname.h
	Definition of the Hostname class.
file	NodeID.h
	Definition of the NodeID class.
file	FountainMasterNode.h
	Definition of the FountainMasterNode class.
file	FountainNode.h
	Definition of the FountainNode class.
file	DarwinMonitor.h
	Definition of the DarwinMonitor class.
file	LinuxMonitor.h
	Definition of the LinuxMonitor class.
file	NodeMonitor.h
	Definition of the NodeMonitorBase class.
file	nodeCommon.h
	Functions definitions used by both node.cpp and masterNode.cpp.
file	NodeMessage.h
	Definitions of classes NodeMessage, NodeRequest, and NodeResponse.
file	TreeNode.h
	Definition of TreeNode class.
file	TreeTopology.h
	Definition of TreeTopology class.
Classes
class	FountainMasterNode
	The FountainMasterNode class extends the FountainNode class by adding or overloading methods to recover from tree failures and handle requests from the Fountain server. More...
class	FountainNode
	A class for maintaining all aspects of a Fountain node. More...
class	FountainNode::forwardMessageToChildren
	Functor class to forward a ConstParseMsgPtr message to all child nodes. More...
class	FountainNodeCreator< T >
	Wrapper policy class around Loki::CreateUsingNew to instantiate singleton instances of FountainNode classes. More...
class	DarwinMonitor
	Mac OS X implementation of the NodeMonitor class. More...
class	LinuxMonitor
	Linux implementation of the NodeMonitor class. More...
class	NodeMonitorBase
	Abstract base class for all node monitoring objects to derive from. More...
class	NodeMessage
	Abstract base class for messages sent to and from Fountain nodes. More...
class	NodeRequest
	Used for request messages sent from a Fountain node. More...
class	NodeResponse
	Used for response messages sent from a Fountain node. More...
class	TreeNode
	represents a Fountain node in the tree topology More...
class	TreeTopology
	A class to maintain the n-way tree toplogy of slave Fountain nodes. More...
Typedefs
typedef Loki::SingletonHolder< FountainMasterNode, FountainNodeCreator >	SingleFountainMasterNode
	Shorthand for getting the singleton instance of the FountainMasterNode class.
typedef TreeTopology::ChildNodeContainer::iterator	FountainNode::childIterator
	Makes it easy to use an iterator for our children vector.
typedef TreeTopology::ChildNodeContainer::const_iterator	FountainNode::constChildIterator
	Makes it easy to use a const_iterator for our children vector.
typedef Loki::SingletonHolder< FountainNode, FountainNodeCreator >	SingleFountainNode
	Shorthand for getting the singleton instance of the FountainNode class.
typedef Loki::SmartPtr< NodeMonitorBase >	NodeMonitorBase::NodeMonitorPtr
	Shorthand for a NodeMonitorBase pointer wrapped inside a SmartPtr object.
typedef std::map< NodeID, FountainWireProtPtr >	TreeTopology::ChildNodeContainer
	Shorthand for accessing child Fountain nodes.
Variables
const time_t	CHILD_RESPONSE_TIMEOUT = 5
	Number of seconds to wait for a child response Ideally this number would change as the tree topology grows larger since the master Fountain node has to wait until all of its children, grandchildren, great grandchildren etc, have processed and responded to the request message until it receives a response. For now we'll leave it as a const variable with static linkage in this file.
bool	DEFAULT_RESTRICT_ACTORS = true
	true if only Fountain nodes with the same "actor" attribute in their request can join us, otherwise any actor attribute is accepted
bool	DEFAULT_RESTRICT_HOSTNAMES = true
	true if hostnames of slave Fountain nodes are determined using the getpeername system call, otherwise the hostnames of slave Fountain nodes are supplied in the join request
const time_t	PARENT_PULSE_TIME_LIMIT = 60
	Time limit in seconds after not receiving a pulsg request from our parent before we report them as lost.
const time_t	CHILD_PULSE_INTERVAL = 20
	Time limit in seconds between sending pulse requests to our child nodes.

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Detailed Description

These files, classes, and typedefs are used to create the Fountain master and slave nodes.

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