/*public void stabilize()
* {
* AsyncCallback getPredecessorCallBack = new AsyncCallback(processGetPredecessorForStabilize);
* successor.beginGetPredecessor(getPredecessorCallBack);
* //if(((Node)self<x) && ((Node)x<successor))
* // successor = x;
* //successor.notify(self);
* }*/
public void beginStabilize(AsyncCallback beginStabilizeCallBack, Object appState)
{
Console.WriteLine("Chord::Engine::beginStabilize ENTER");
lock (successorLock)
{
if (successor == self)
{
if (beginStabilizeCallBack != null)
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
beginStabilizeCallBack(res);
}
else
{
return;
}
}
}
Tashjik.Common.AsyncCallback_Object thisAppState = new Tashjik.Common.AsyncCallback_Object();
thisAppState.callBack = beginStabilizeCallBack;
thisAppState.obj = appState;
Console.WriteLine("Chord::Engine::beginStabilize successor != self");
AsyncCallback getPredecessorCallBack = new AsyncCallback(processGetPredecessorForStabilize);
lock (successorLock)
{
successor.beginGetPredecessor(getPredecessorCallBack, thisAppState);
}
Console.WriteLine("Chord::Engine::beginStabilize EXIT");
}
public void beginPutData(byte[] key, byte[] data, int offset, int size, AsyncCallback putDataCallBack, Object appState)
{
Console.WriteLine("ChordRealNode::beginPutData ENTER");
//once DataStore gets complex, this operation should not complete on the same synchronous thread
dataStore.putData(key, data, offset, size);
IAsyncResult putDataResult = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
putDataCallBack(putDataResult);
}
/* public void notify(Node possiblePred)
* {
* engine.notify(possiblePred);
*
* }
*
* private void beginJoin(IChordNode joinNode, AsyncCallback joinCallBack, Object appState)
* {
* engine.beginJoin(joinNode, joinCallBack, appState);
* }
*/
public void beginPredecessorNotify(IChordNode possiblePred, AsyncCallback notifyCallBack, Object appState)
{
engine.notify(possiblePred);
if (!(notifyCallBack == null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
notifyCallBack(res);
}
}
void processFindSuccessorForJoin(IAsyncResult result)
{
Console.WriteLine("ChordRealNode::Engine::processFindSuccessorForJoin ENTER");
ChordCommon.IChordNode_Object iNode_Object = (ChordCommon.IChordNode_Object)(result.AsyncState);
Tashjik.Common.AsyncCallback_Object thisAppState = (Tashjik.Common.AsyncCallback_Object)(iNode_Object.obj);
lock (successorLock)
{
successor = iNode_Object.node;
}
Console.WriteLine("ChordRealNode::Engine::processFindSuccessorForJoin successor has been set");
lock (successorLock)
{
successor.beginGetFingerTable(new AsyncCallback(processGetFingerTableForJoin), thisAppState);
}
//we have found the successor, and a request has been made for its finger table
//once the finger table comes in, a findSiccessor call will be made to each of them
//do we need to wait till all of them respond? wat if a few of them go down
// we can't hang forever... better to return back, and allow the client to query
// if the queries happen immediately, tey will fail because the finger table is still empty
// as the finger table starts filling up, the queries will get answered better
//
// other possible solutions: wait for some time (and not indefinitely), and then allow
// the client to query. But how long should we wait? In the literature do we have any such
// approximate times by which quesries will come back? totally unpredictable I feel... depends
// on whether the n/w is the intyernet or a LAN, etc,.
//
// maybe we could wait till a certain number of entries inthe finger table get filled up ...
// maybe 60% .... but how do we decide on this number ... perhaps ChordCylinder will have
// data on Churn rates and can set this. Will require significant chanes to the architecture,
// because here the client is deciding on how long we should wait
AsyncCallback callBack = thisAppState.callBack;
Object appState1 = thisAppState.obj;
if (!(callBack == null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState1, true, true);
callBack(res);
}
}
void processFindSuccessorForFixFingers(IAsyncResult result)
{
Console.WriteLine("Chord::ChordRealNode::Engine processFindSuccessorForFixFingers ENTER");
ChordCommon.IChordNode_Object iNode_Object = (ChordCommon.IChordNode_Object)(result.AsyncState);
Tashjik.Common.AsyncCallback_Object thisAppState = (Tashjik.Common.AsyncCallback_Object)(iNode_Object.obj);
ObjectInt fingerState = (ObjectInt)(thisAppState.obj);
finger[fingerState.i] = iNode_Object.node;
AsyncCallback callBack = thisAppState.callBack;
Object origAppState = fingerState.appState;
if (!(callBack == null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(origAppState, true, true);
callBack(res);
}
}
void processPingForCheckPredecessor(IAsyncResult result)
{
Console.WriteLine("Chord::ChordRealNode::Engine processPingForCheckPredecessor ENTER");
Tashjik.Common.Bool_Object thisAppState = (Tashjik.Common.Bool_Object)(result.AsyncState);
Tashjik.Common.AsyncCallback_Object checkPredecessorAppState = (Tashjik.Common.AsyncCallback_Object)(thisAppState.obj);
if (!(thisAppState.b))
{
predecessor = null;
}
//AsyncCallback callBack = ((Tashjik.Common.AsyncCallback_Object)appState).callBack;
//Object appState1 = ((Tashjik.Common.AsyncCallback_Object)appState).obj;
if (!(checkPredecessorAppState.callBack == null))
{
Console.WriteLine("Chord::ChordRealNode::Engine processPingForCheckPredecessor callBack!=null");
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(checkPredecessorAppState.obj, true, true);
checkPredecessorAppState.callBack(res);
}
}
public void beginCheckPredecessor(AsyncCallback checkPredecesorCallBack, Object appState)
{
Console.WriteLine("Chord::ChordRealNode::Engine beginCheckPredecessor ENTER");
if (predecessor == null)
{
if (checkPredecesorCallBack != null)
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
checkPredecesorCallBack(res);
}
else
{
return;
}
}
Tashjik.Common.AsyncCallback_Object thisAppState = new Tashjik.Common.AsyncCallback_Object();
thisAppState.callBack = checkPredecesorCallBack;
thisAppState.obj = appState;
AsyncCallback pingCallBack = new AsyncCallback(processPingForCheckPredecessor);
predecessor.beginPing(pingCallBack, thisAppState);
}
void processFindSuccessorForJoin(IAsyncResult result)
{
Console.WriteLine("ChordRealNode::Engine::processFindSuccessorForJoin ENTER");
ChordCommon.IChordNode_Object iNode_Object = (ChordCommon.IChordNode_Object)(result.AsyncState);
Tashjik.Common.AsyncCallback_Object thisAppState = (Tashjik.Common.AsyncCallback_Object)(iNode_Object.obj);
lock (successorLock)
{
successor = iNode_Object.node;
}
Console.WriteLine("ChordRealNode::Engine::processFindSuccessorForJoin successor has been set");
lock (successorLock)
{
successor.beginGetFingerTable(new AsyncCallback(processGetFingerTableForJoin), thisAppState);
}
//we have found the successor, and a request has been made for its finger table
//once the finger table comes in, a findSiccessor call will be made to each of them
//do we need to wait till all of them respond? wat if a few of them go down
// we can't hang forever... better to return back, and allow the client to query
// if the queries happen immediately, tey will fail because the finger table is still empty
// as the finger table starts filling up, the queries will get answered better
//
// other possible solutions: wait for some time (and not indefinitely), and then allow
// the client to query. But how long should we wait? In the literature do we have any such
// approximate times by which quesries will come back? totally unpredictable I feel... depends
// on whether the n/w is the intyernet or a LAN, etc,.
//
// maybe we could wait till a certain number of entries inthe finger table get filled up ...
// maybe 60% .... but how do we decide on this number ... perhaps ChordCylinder will have
// data on Churn rates and can set this. Will require significant chanes to the architecture,
// because here the client is deciding on how long we should wait
AsyncCallback callBack = thisAppState.callBack;
Object appState1 = thisAppState.obj;
if (!(callBack == null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState1, true, true);
callBack(res);
}
}
void processFindSuccessorForFixFingers(IAsyncResult result)
{
Console.WriteLine("Chord::ChordRealNode::Engine processFindSuccessorForFixFingers ENTER");
ChordCommon.IChordNode_Object iNode_Object = (ChordCommon.IChordNode_Object) (result.AsyncState);
Tashjik.Common.AsyncCallback_Object thisAppState = (Tashjik.Common.AsyncCallback_Object)(iNode_Object.obj);
ObjectInt fingerState = (ObjectInt)(thisAppState.obj);
finger[fingerState.i] = iNode_Object.node;
AsyncCallback callBack = thisAppState.callBack;
Object origAppState = fingerState.appState;
if(!(callBack==null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(origAppState, true, true);
callBack(res);
}
}
/*public void stabilize()
{
AsyncCallback getPredecessorCallBack = new AsyncCallback(processGetPredecessorForStabilize);
successor.beginGetPredecessor(getPredecessorCallBack);
//if(((Node)self<x) && ((Node)x<successor))
// successor = x;
//successor.notify(self);
}*/
public void beginStabilize(AsyncCallback beginStabilizeCallBack, Object appState)
{
Console.WriteLine("Chord::Engine::beginStabilize ENTER");
lock (successorLock)
{
if (successor == self)
{
if (beginStabilizeCallBack != null)
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
beginStabilizeCallBack(res);
}
else
return;
}
}
Tashjik.Common.AsyncCallback_Object thisAppState = new Tashjik.Common.AsyncCallback_Object();
thisAppState.callBack = beginStabilizeCallBack;
thisAppState.obj = appState;
Console.WriteLine("Chord::Engine::beginStabilize successor != self");
AsyncCallback getPredecessorCallBack = new AsyncCallback(processGetPredecessorForStabilize);
lock (successorLock)
{
successor.beginGetPredecessor(getPredecessorCallBack, thisAppState);
}
Console.WriteLine("Chord::Engine::beginStabilize EXIT");
}
public void beginCheckPredecessor(AsyncCallback checkPredecesorCallBack, Object appState)
{
Console.WriteLine("Chord::ChordRealNode::Engine beginCheckPredecessor ENTER");
if(predecessor==null)
{
if(checkPredecesorCallBack!=null)
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
checkPredecesorCallBack(res);
}
else
return;
}
Tashjik.Common.AsyncCallback_Object thisAppState = new Tashjik.Common.AsyncCallback_Object();
thisAppState.callBack = checkPredecesorCallBack;
thisAppState.obj = appState;
AsyncCallback pingCallBack = new AsyncCallback(processPingForCheckPredecessor);
predecessor.beginPing(pingCallBack, thisAppState);
}
public void beginPutData(byte[] key, byte[] data, int offset, int size, AsyncCallback putDataCallBack, Object appState)
{
Console.WriteLine("ChordRealNode::beginPutData ENTER");
//once DataStore gets complex, this operation should not complete on the same synchronous thread
dataStore.putData(key, data, offset, size);
IAsyncResult putDataResult = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
putDataCallBack(putDataResult);
}
/* public void notify(Node possiblePred)
{
engine.notify(possiblePred);
}
private void beginJoin(IChordNode joinNode, AsyncCallback joinCallBack, Object appState)
{
engine.beginJoin(joinNode, joinCallBack, appState);
}
*/
public void beginPredecessorNotify(IChordNode possiblePred, AsyncCallback notifyCallBack, Object appState)
{
engine.notify(possiblePred);
if(!(notifyCallBack==null))
{
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(appState, true, true);
notifyCallBack(res);
}
}
void processPingForCheckPredecessor(IAsyncResult result)
{
Console.WriteLine("Chord::ChordRealNode::Engine processPingForCheckPredecessor ENTER");
Tashjik.Common.Bool_Object thisAppState = (Tashjik.Common.Bool_Object)(result.AsyncState);
Tashjik.Common.AsyncCallback_Object checkPredecessorAppState = (Tashjik.Common.AsyncCallback_Object)(thisAppState.obj);
if(!(thisAppState.b))
predecessor = null;
//AsyncCallback callBack = ((Tashjik.Common.AsyncCallback_Object)appState).callBack;
//Object appState1 = ((Tashjik.Common.AsyncCallback_Object)appState).obj;
if(!(checkPredecessorAppState.callBack==null))
{
Console.WriteLine("Chord::ChordRealNode::Engine processPingForCheckPredecessor callBack!=null");
IAsyncResult res = new Tashjik.Common.ObjectAsyncResult(checkPredecessorAppState.obj, true, true);
checkPredecessorAppState.callBack(res);
}
}
