com.facebook.presto.execution

Interface QueryManager

All Known Implementing Classes:

NoOpQueryManager, SqlQueryManager

public interface QueryManager

Method Summary

Modifier and Type	Method and Description
void	addOutputInfoListener(QueryId queryId, Consumer<QueryExecution.QueryOutputInfo> listener) Add a listener that fires once the query output locations are known.
void	addStateChangeListener(QueryId queryId, StateMachine.StateChangeListener<QueryState> listener) Add a listener that fires each time the query state changes.
void	cancelQuery(QueryId queryId) Attempts to fail the query due to a user cancellation.
void	cancelStage(StageId stageId) Attempts to cancel the stage and continue the query.
void	createQuery(QueryExecution execution) Creates a new query using the specified query execution.
void	failQuery(QueryId queryId, Throwable cause) Attempts to fail the query for the specified reason.
QueryInfo	getFullQueryInfo(QueryId queryId)
List<BasicQueryInfo>	getQueries()
BasicQueryInfo	getQueryInfo(QueryId queryId)
int	getQueryRetryCount(QueryId queryId)
Session	getQuerySession(QueryId queryId)
QueryState	getQueryState(QueryId queryId)
com.google.common.util.concurrent.ListenableFuture<QueryState>	getStateChange(QueryId queryId, QueryState currentState) Gets a future that completes when the query changes from the specified current state or immediately if the query is already in a final state.
QueryManagerStats	getStats()
boolean	isQuerySlugValid(QueryId queryId, String slug)
void	recordHeartbeat(QueryId queryId) Updates the client heartbeat time, to prevent the query from be automatically purged.

Method Detail

getQueries

List<BasicQueryInfo> getQueries()

addOutputInfoListener

void addOutputInfoListener(QueryId queryId,
                           Consumer<QueryExecution.QueryOutputInfo> listener)
                    throws NoSuchElementException

Add a listener that fires once the query output locations are known.

Throws:

NoSuchElementException - if query does not exist

addStateChangeListener

void addStateChangeListener(QueryId queryId,
                            StateMachine.StateChangeListener<QueryState> listener)
                     throws NoSuchElementException

Add a listener that fires each time the query state changes. Listener is always notified asynchronously using a dedicated notification thread pool so, care should be taken to avoid leaking this when adding a listener in a constructor. Additionally, it is possible notifications are observed out of order due to the asynchronous execution.

Throws:

NoSuchElementException - if query does not exist

getStateChange

com.google.common.util.concurrent.ListenableFuture<QueryState> getStateChange(QueryId queryId,
                                                                              QueryState currentState)

Gets a future that completes when the query changes from the specified current state or immediately if the query is already in a final state. If the query does not exist, the future will contain a NoSuchElementException

getQueryInfo

BasicQueryInfo getQueryInfo(QueryId queryId)
                     throws NoSuchElementException

Throws:

NoSuchElementException - if query does not exist

getFullQueryInfo

QueryInfo getFullQueryInfo(QueryId queryId)
                    throws NoSuchElementException

Throws:

NoSuchElementException - if query does not exist

getQuerySession

Session getQuerySession(QueryId queryId)

Throws:

NoSuchElementException - if query does not exist

isQuerySlugValid

boolean isQuerySlugValid(QueryId queryId,
                         String slug)

Throws:

NoSuchElementException - if query does not exist

getQueryRetryCount

int getQueryRetryCount(QueryId queryId)

Throws:

NoSuchElementException - if query does not exist

getQueryState

QueryState getQueryState(QueryId queryId)
                  throws NoSuchElementException

Throws:

NoSuchElementException - if query does not exist

recordHeartbeat

void recordHeartbeat(QueryId queryId)

Updates the client heartbeat time, to prevent the query from be automatically purged. If the query does not exist, the call is ignored.

createQuery

void createQuery(QueryExecution execution)

Creates a new query using the specified query execution.

failQuery

void failQuery(QueryId queryId,
               Throwable cause)

Attempts to fail the query for the specified reason. If the query is already in a final state, the call is ignored. If the query does not exist, the call is ignored.

cancelQuery

void cancelQuery(QueryId queryId)

Attempts to fail the query due to a user cancellation. If the query is already in a final state, the call is ignored. If the query does not exist, the call is ignored.

cancelStage

void cancelStage(StageId stageId)

Attempts to cancel the stage and continue the query. If the stage is already in a final state, the call is ignored. If the query does not exist, the call is ignored.

getStats

QueryManagerStats getStats()