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

Class SchemaDriver

java.lang.Object

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

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

All Implemented Interfaces:

IDriver

@NotThreadSafe
public class SchemaDriver
extends Driver

One SchemaDriver is used to execute one FragmentInstance which is for metadata query.

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
SchemaDriver(Operator root, ISinkHandle sinkHandle, SchemaDriverContext driverContext)

Method Summary

Modifier and Type	Method	Description
protected boolean	init(com.google.common.util.concurrent.SettableFuture<?> blockedFuture)	do initialization
protected void	releaseResource()	release resource this driver used

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

SchemaDriver

public SchemaDriver(Operator root,
                    ISinkHandle sinkHandle,
                    SchemaDriverContext 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()

Description copied from class: Driver

release resource this driver used

Specified by:

releaseResource in class Driver