rice.p2p.glacier.v2
Class DebugContent

java.lang.Object
  rice.p2p.glacier.v2.DebugContent

All Implemented Interfaces:

java.io.Serializable, GCPastContent, PastContent

public class DebugContent

extends java.lang.Object

implements PastContent, GCPastContent

See Also:

Serialized Form

Field Summary

protected boolean	isMutable
protected Id	myId
protected byte[]	payload
protected long	version

Constructor Summary

DebugContent(Id id, boolean isMutable, long version, byte[] payload)

Method Summary

PastContent	checkInsert(Id id, PastContent existingContent) Checks if a insert operation should be allowed.
GCPastContentHandle	getHandle(GCPast local, long expiration) Produces a handle for this content object.
PastContentHandle	getHandle(Past local) Produces a handle for this content object.
Id	getId() Returns the Id under which this object is stored in Past.
GCPastMetadata	getMetadata(long expiration) Returns the metadata which should be stored with this object.
byte[]	getPayload()
long	getVersion() Returns the version number associated with this PastContent object - version numbers are designed to be monotonically increasing numbers which signify different versions of the same object.
boolean	isMutable() States if this content object is mutable.

Methods inherited from class java.lang.Object

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

Field Detail

myId

protected Id myId

isMutable

protected boolean isMutable

version

protected long version

payload

protected transient byte[] payload

Constructor Detail

DebugContent

public DebugContent(Id id,
                    boolean isMutable,
                    long version,
                    byte[] payload)

Method Detail

checkInsert

public PastContent checkInsert(Id id,
                               PastContent existingContent)
                        throws PastException

Description copied from interface: PastContent

Checks if a insert operation should be allowed. Invoked when a Past node receives an insert request and it is a replica root for the id; invoked on the object to be inserted. This method determines the effect of an insert operation on an object that already exists: it computes the new value of the stored object, as a function of the new and the existing object.

Specified by:

checkInsert in interface PastContent

Parameters:

id - the key identifying the object

Returns:

null, if the operation is not allowed; else, the new object to be stored on the local node.

Throws:

PastException

getVersion

public long getVersion()

Description copied from interface: GCPastContent

Returns the version number associated with this PastContent object - version numbers are designed to be monotonically increasing numbers which signify different versions of the same object.

Specified by:

getVersion in interface GCPastContent

Returns:

The version number of this object

getHandle

public PastContentHandle getHandle(Past local)

Description copied from interface: PastContent

Produces a handle for this content object. The handle is retrieved and returned to the client as a result of the Past.lookupHandles() method.

Specified by:

getHandle in interface PastContent

Returns:

the handle

getHandle

public GCPastContentHandle getHandle(GCPast local,
                                     long expiration)

Description copied from interface: GCPastContent

Produces a handle for this content object. The handle is retrieved and returned to the client as a result of the Past.lookupHandles() method.

Specified by:

getHandle in interface GCPastContent

Returns:

the handle

getId

public Id getId()

Description copied from interface: PastContent

Returns the Id under which this object is stored in Past.

Specified by:

getId in interface PastContent

Returns:

the id

isMutable

public boolean isMutable()

Description copied from interface: PastContent

States if this content object is mutable. Mutable objects are not subject to dynamic caching in Past.

Specified by:

isMutable in interface PastContent

Returns:

true if this object is mutable, else false

getPayload

public byte[] getPayload()

getMetadata

public GCPastMetadata getMetadata(long expiration)

Description copied from interface: GCPastContent

Returns the metadata which should be stored with this object. Allows applications to add arbitrary items into the object's metadata.

Specified by:

getMetadata in interface GCPastContent

Returns:

the handle