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java.lang.Object | +--tapestry.api.TapestryRouteMsg | +--tapestry.api.TapestryRepairObjReq
TapestryRepairObjReq
is a
msg
sent from a
root
tapestry
node to a server requesting that an object be repaired. The
TapestryRepairObjReq
msg is generated when
the low_watermark
(i.e. threshold) for the number of
ptrs
specified in the
TapestryThresholdTag
is reached; that is,
a TapestryRepairObjReq
is triggered from the
number of remaining ptrs
.
The root
can send the TapestryRepairObjReq
to any number of the remaining server nodes (e.g. only one, half,
all servers, etc). Any coordination required to repair the object
will have to be done between the servers.
Finally, the TapestryRepairObjReq
has to be followed by a
TapestryRepairObjResp
. The
TapestryRepairObjResp
is simply an
acknowledgment of the repair request. That is, it is not an
acknowledgment that the object has been repaired yet. The
root
node will know the object is repaired when the
number of ptrs
increase.
The TapestryRepairObjResp
is provided
as a clean way for the root
node to know an object is being
repaired without having to send the TapestryRepairObjReq
to all the remaining servers and without having to wait for the
ptrs
to increase.
Field Summary |
---|
Fields inherited from class tapestry.api.TapestryRouteMsg |
---|
hopCount, inbound, peer, qos, TTL |
Constructor Summary | |
---|---|
TapestryRepairObjReq(InputBuffer buffer)
Constructs a TapestryRepairObjReq from its
serialized form. |
|
TapestryRepairObjReq(SecureHash node,
SecureHash objguid,
TapestryThresholdTag tag,
QSTreeSet remaining,
QSTreeSet dead)
Constucts a TapestryRepairObjReq from specified parameters. |
Method Summary | |
---|---|
QSTreeSet |
getDead()
dead returns the set of dead servers that
use to contain the object that needs to be repaired. |
SecureHash |
getObjguid()
getObjguid returns the
identifier of object that needs
to be repaired. |
QSTreeSet |
getRemaining()
remaining returns the set of remaining servers that
contain the object that needs to be repaired. |
TapestryThresholdTag |
getTag()
getTag returns the
Tag
of the object that needs to be repaired. |
void |
serialize(OutputBuffer buffer)
Specified by ostore.util.QuickSerializable |
String |
toString()
Specified by java.lang.Object |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public TapestryRepairObjReq(SecureHash node, SecureHash objguid, TapestryThresholdTag tag, QSTreeSet remaining, QSTreeSet dead)
TapestryRepairObjReq
from specified parameters.
node
- Server that needs to repair object.objguid
- identifier
of
object that needs to be repaired.tag
- Tag
of the object that needs to be repaired.remaining
- set of remaining servers that contain the
object that needs to be repaired.dead
- set of dead servers that use to contain the
object that needs to be repaired.public TapestryRepairObjReq(InputBuffer buffer) throws QSException
TapestryRepairObjReq
from its
serialized
form.
buffer
- serialized
form of object.Method Detail |
public SecureHash getObjguid()
getObjguid
returns the
identifier
of object that needs
to be repaired.
identifier
of object
that needs to be repaired.public TapestryThresholdTag getTag()
getTag
returns the
Tag
of the object that needs to be repaired.
Tag
of the object that needs to be repaired.public QSTreeSet getRemaining()
remaining
returns the set of remaining servers that
contain the object that needs to be repaired.
public QSTreeSet getDead()
dead
returns the set of dead servers that
use to contain the object that needs to be repaired.
public void serialize(OutputBuffer buffer)
serialize
in interface QuickSerializable
serialize
in class TapestryRouteMsg
public String toString()
toString
in class Object
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