com.orientechnologies.orient.server.distributed

Class ODistributedResponseManager

java.lang.Object

com.orientechnologies.orient.server.distributed.ODistributedResponseManager

public class ODistributedResponseManager
extends Object

Asynchronous response manager. All the public methods have to pay attention on synchronizing access by using synchronousResponsesLock lock.

Author:

Luca Garulli (l.garulli--at--orientechnologies.com)

Field Summary

Fields

Modifier and Type	Field and Description
static int	ADDITIONAL_TIMEOUT_CLUSTER_SHAPE

Constructor Summary

Constructors

Constructor and Description
ODistributedResponseManager(ODistributedServerManager iManager, ODistributedRequest iRequest, Collection<String> expectedResponses, Set<String> iNodesConcurInQuorum, int iTotalExpectedResponses, int iQuorum, boolean iWaitForLocalNode, long iSynchTimeout, long iTotalTimeout, boolean iGroupResponsesByResult)

Method Summary

Modifier and Type	Method and Description
protected boolean	checkNoWinnerCase(List<ODistributedResponse> bestResponsesGroup)
boolean	collectResponse(ODistributedResponse response) Not synchronized, it's called when a message arrives
protected boolean	fixNodesInConflict(List<ODistributedResponse> bestResponsesGroup, int conflicts)
protected int	getBestResponsesGroup() Returns the biggest response group.
protected List<ODistributedResponse>	getConflictResponses() Returns all the responses in conflict.
String	getDatabaseName()
Set<String>	getExpectedNodes()
protected int	getExpectedResponses()
ODistributedResponse	getFinalResponse()
ODistributedRequestId	getMessageId()
List<String>	getMissingNodes() Returns the list of node names that didn't provide a response.
protected int	getMissingResponses()
int	getQuorum()
protected List<ODistributedResponse>	getReceivedResponses() Returns the received response objects.
protected int	getReceivedResponsesCount()
List<String>	getRespondingNodes() Returns the list of node names that provided a response.
long	getSentOn()
long	getSynchTimeout()
protected long	getTotalTimeout()
protected boolean	isMinimumQuorumReached()
boolean	isReceivedCurrentNode()
boolean	isWaitForLocalNode()
protected RuntimeException	manageConflicts()
void	notifyWaiters()
void	removeServerBecauseUnreachable(String node)
void	setLocalResult(String localNodeName, Object localResult)
void	timeout()
protected boolean	undoRequest()
boolean	waitForSynchronousResponses() Waits until the minimum responses are collected or timeout occurs.

Methods inherited from class java.lang.Object

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

Field Detail

ADDITIONAL_TIMEOUT_CLUSTER_SHAPE

public static final int ADDITIONAL_TIMEOUT_CLUSTER_SHAPE

See Also:

Constant Field Values

Constructor Detail

ODistributedResponseManager

public ODistributedResponseManager(ODistributedServerManager iManager,
                                   ODistributedRequest iRequest,
                                   Collection<String> expectedResponses,
                                   Set<String> iNodesConcurInQuorum,
                                   int iTotalExpectedResponses,
                                   int iQuorum,
                                   boolean iWaitForLocalNode,
                                   long iSynchTimeout,
                                   long iTotalTimeout,
                                   boolean iGroupResponsesByResult)

Method Detail

collectResponse

public boolean collectResponse(ODistributedResponse response)

Not synchronized, it's called when a message arrives

Parameters:

response - Received response to collect

Returns:

True if all the nodes responded, otherwise false

notifyWaiters

public void notifyWaiters()

getMessageId

public ODistributedRequestId getMessageId()

getSentOn

public long getSentOn()

setLocalResult

public void setLocalResult(String localNodeName,
                           Object localResult)

removeServerBecauseUnreachable

public void removeServerBecauseUnreachable(String node)

getQuorum

public int getQuorum()

waitForSynchronousResponses

public boolean waitForSynchronousResponses()
                                    throws InterruptedException

Waits until the minimum responses are collected or timeout occurs. If "waitForLocalNode" wait also for local node.

Returns:

True if the received responses are major or equals then the expected synchronous responses, otherwise false

Throws:

InterruptedException

isWaitForLocalNode

public boolean isWaitForLocalNode()

isReceivedCurrentNode

public boolean isReceivedCurrentNode()

getFinalResponse

public ODistributedResponse getFinalResponse()

getDatabaseName

public String getDatabaseName()

getSynchTimeout

public long getSynchTimeout()

timeout

public void timeout()

getMissingNodes

public List<String> getMissingNodes()

Returns the list of node names that didn't provide a response.

getExpectedNodes

public Set<String> getExpectedNodes()

getRespondingNodes

public List<String> getRespondingNodes()

Returns the list of node names that provided a response.

getConflictResponses

protected List<ODistributedResponse> getConflictResponses()

Returns all the responses in conflict.

Returns:

getExpectedResponses

protected int getExpectedResponses()

getMissingResponses

protected int getMissingResponses()

getReceivedResponsesCount

protected int getReceivedResponsesCount()

getTotalTimeout

protected long getTotalTimeout()

getBestResponsesGroup

protected int getBestResponsesGroup()

Returns the biggest response group.

Returns:

isMinimumQuorumReached

protected boolean isMinimumQuorumReached()

getReceivedResponses

protected List<ODistributedResponse> getReceivedResponses()

Returns the received response objects.

manageConflicts

protected RuntimeException manageConflicts()

undoRequest

protected boolean undoRequest()

fixNodesInConflict

protected boolean fixNodesInConflict(List<ODistributedResponse> bestResponsesGroup,
                                     int conflicts)

checkNoWinnerCase

protected boolean checkNoWinnerCase(List<ODistributedResponse> bestResponsesGroup)