Package org.apache.drill.exec.server.rest

Class WebUserConnection

java.lang.Object

org.apache.drill.exec.rpc.AbstractDisposableUserClientConnection

org.apache.drill.exec.server.rest.BaseWebUserConnection

org.apache.drill.exec.server.rest.WebUserConnection

All Implemented Interfaces:

ConnectionThrottle, UserClientConnection

Direct Known Subclasses:

WebUserConnection.AnonWebUserConnection

public class WebUserConnection
extends BaseWebUserConnection

WebUserConnectionWrapper which represents the UserClientConnection between WebServer and Foreman, for the WebUser submitting the query. It provides access to the UserSession executing the query. There is no actual physical channel corresponding to this connection wrapper. It returns a close future which do have an EventExecutor out of BitServer EventLoopGroup. Close future is set only when the WebSessionResources are closed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	WebUserConnection.AnonWebUserConnection

Field Summary

Fields

Modifier and Type	Field	Description
final Set<String>	columns
final List<String>	metadata
final List<Map<String,String>>	results

Fields inherited from class org.apache.drill.exec.server.rest.BaseWebUserConnection

webSessionResources

Fields inherited from class org.apache.drill.exec.rpc.AbstractDisposableUserClientConnection

error, latch, queryState

Method Summary

Modifier and Type	Method	Description
void	cleanupSession()	For authenticated WebUser no cleanup of WebSessionResources is done since it's re-used for all the queries until lifetime of the web session.
int	getAutoLimitRowCount()	Gets the max size of records to be sent back by the query
void	sendData(RpcOutcomeListener<GeneralRPCProtos.Ack> listener, QueryDataPackage data)	Send query data to client.

Methods inherited from class org.apache.drill.exec.server.rest.BaseWebUserConnection

getClosureFuture, getRemoteAddress, getSession, resources, setAutoRead, webDataType

Methods inherited from class org.apache.drill.exec.rpc.AbstractDisposableUserClientConnection

await, await, getError, getQueryState, sendResult

Methods inherited from class java.lang.Object

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

Field Details

results

public final List<Map<String,String>> results

columns

public final Set<String> columns

metadata

public final List<String> metadata

Method Details

sendData

public void sendData(RpcOutcomeListener<GeneralRPCProtos.Ack> listener,
 QueryDataPackage data)

Description copied from interface: UserClientConnection

Send query data to client. Outcome is returned through listener.

Parameters:

listener - The listener

data - The data to be sent

cleanupSession

public void cleanupSession()

For authenticated WebUser no cleanup of WebSessionResources is done since it's re-used for all the queries until lifetime of the web session.

getAutoLimitRowCount

public int getAutoLimitRowCount()

Gets the max size of records to be sent back by the query

Returns:

Max number of records to be sent back to WebServer