Package org.apache.iotdb.db.mpp.execution.driver

Class DataDriver

java.lang.Object

org.apache.iotdb.db.mpp.execution.driver.Driver

org.apache.iotdb.db.mpp.execution.driver.DataDriver

All Implemented Interfaces:

IDriver

@NotThreadSafe
public class DataDriver
extends Driver

One dataDriver is responsible for one FragmentInstance which is for data query, which may contains several series.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.iotdb.db.mpp.execution.driver.Driver

Driver.State

Field Summary

Fields inherited from class org.apache.iotdb.db.mpp.execution.driver.Driver

driverBlockedFuture, driverContext, exclusiveLock, LOGGER, root, sinkHandle, state

Constructor Summary

Constructors

Constructor	Description
DataDriver(Operator root, ISinkHandle sinkHandle, DataDriverContext driverContext)

Method Summary

Modifier and Type	Method	Description
protected boolean	init(com.google.common.util.concurrent.SettableFuture<?> blockedFuture)	do initialization
protected void	releaseResource()	All file paths used by this fragment instance must be cleared and thus the usage reference must be decreased.

Methods inherited from class org.apache.iotdb.db.mpp.execution.driver.Driver

close, failed, getInfo, getSinkHandle, isFinished, processFor

Methods inherited from class java.lang.Object

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

Constructor Detail

DataDriver

public DataDriver(Operator root,
                  ISinkHandle sinkHandle,
                  DataDriverContext driverContext)

Method Detail

init

protected boolean init(com.google.common.util.concurrent.SettableFuture<?> blockedFuture)

Description copied from class: Driver

do initialization

Specified by:

init in class Driver

Returns:

true if init succeed, false otherwise

releaseResource

protected void releaseResource()

All file paths used by this fragment instance must be cleared and thus the usage reference must be decreased.

Specified by:

releaseResource in class Driver