```
public class QueryStateMachine
extends java.lang.Object
```
State machine for a QueryExecution. It stores the states for the QueryExecution. Others can register listeners when the state changes of the QueryExecution.

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addStateChangeListener(StateMachine.StateChangeListener<QueryState> stateChangeListener)`
`java.lang.String`	`getFailureMessage()`
`org.apache.iotdb.common.rpc.thrift.TSStatus`	`getFailureStatus()`
`QueryState`	`getState()`
`com.google.common.util.concurrent.ListenableFuture<QueryState>`	`getStateChange(QueryState currentState)`
`void`	`transitionToAborted()`
`void`	`transitionToCanceled()`
`void`	`transitionToDispatching()`
`void`	`transitionToFailed()`
`void`	`transitionToFailed(java.lang.Throwable throwable)`
`void`	`transitionToFailed(org.apache.iotdb.common.rpc.thrift.TSStatus failureStatus)`
`void`	`transitionToFinished()`
`void`	`transitionToPendingRetry(org.apache.iotdb.common.rpc.thrift.TSStatus failureStatus)`
`void`	`transitionToPlanned()`
`void`	`transitionToQueued()`
`void`	`transitionToRunning()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

public QueryStateMachine(QueryId queryId,
                         java.util.concurrent.ExecutorService executor)

public void addStateChangeListener(StateMachine.StateChangeListener<QueryState> stateChangeListener)

public com.google.common.util.concurrent.ListenableFuture<QueryState> getStateChange(QueryState currentState)

public void transitionToPendingRetry(org.apache.iotdb.common.rpc.thrift.TSStatus failureStatus)

public void transitionToFailed(java.lang.Throwable throwable)

public void transitionToFailed(org.apache.iotdb.common.rpc.thrift.TSStatus failureStatus)

public java.lang.String getFailureMessage()

public org.apache.iotdb.common.rpc.thrift.TSStatus getFailureStatus()

Class QueryStateMachine