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com.ubermq.chord
Class AbstractChordInfrastructure  

java.lang.Object
  com.ubermq.chord.AbstractChordInfrastructure

All Implemented Interfaces:

ChordInfrastructure

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public abstract class AbstractChordInfrastructure

extends java.lang.Object

implements ChordInfrastructure

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Field Summary
protected  ChordIdentifierFactory	identifierFactory           The identifier factory that can be used to create chord identifiers.
private  int	replication

 

Constructor Summary
protected	AbstractChordInfrastructure(ChordIdentifierFactory f, int replication)           Creates an abstract chord infrastructure object, given an identifier factory.

 

Method Summary
ChordNode	findPredecessor(ChordIdentifier id)           Returns the node that precedes the specified identifier on the identifier circle.
ChordNode	findSuccessor(ChordIdentifier id)           Returns the node that follows the specified identifier on the identifier circle.
java.lang.Object	query(java.lang.Object key)           Queries the infrastructure for the value associated with a key.
void	store(java.lang.Object key, java.lang.Object value)           Stores the given value at the specified key, somewhere in the chord infrastructure.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface com.ubermq.chord.ChordInfrastructure

close, entryPoint, getEntryPointURI

 

Field Detail

identifierFactory

protected final ChordIdentifierFactory identifierFactory

The identifier factory that can be used to create chord identifiers.

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replication

private int replication

Constructor Detail

AbstractChordInfrastructure

protected AbstractChordInfrastructure(ChordIdentifierFactory f,
                                      int replication)

Creates an abstract chord infrastructure object, given an identifier factory.

Method Detail

query

public java.lang.Object query(java.lang.Object key)
                       throws java.rmi.RemoteException

Queries the infrastructure for the value associated with a key. Since a query operation is computationally and network intensive, it is assumed that nodes have some expectation that the given key resides somewhere in the infrastructure.

Specified by:

query in interface ChordInfrastructure

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store

public void store(java.lang.Object key,
                  java.lang.Object value)
           throws java.rmi.RemoteException

Stores the given value at the specified key, somewhere in the chord infrastructure. In the absence of concurrent modification, it is true that:

given i.store(key, v), then v == i.query(key);

By design, clients should not need to be aware of physically where the information associated with the key is stored.

Specified by:

store in interface ChordInfrastructure

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findSuccessor

public ChordNode findSuccessor(ChordIdentifier id)

Returns the node that follows the specified identifier on the identifier circle. This node is known as the successor, and is in charge of storing keys for the given identifier.

Specified by:

findSuccessor in interface ChordInfrastructure

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findPredecessor

public ChordNode findPredecessor(ChordIdentifier id)

Returns the node that precedes the specified identifier on the identifier circle.

Specified by:

findPredecessor in interface ChordInfrastructure

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Overview  Package   Class  Use  Deprecated  Index
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SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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