OpChain (Pinot Query Runtime 1.0.0 API)

java.lang.Object
- org.apache.pinot.query.runtime.operator.OpChain

All Implemented Interfaces:

AutoCloseable
```
public class OpChain
extends Object
implements AutoCloseable
```
An OpChain represents a chain of operators that are separated by send/receive stages.

Constructor Summary

Constructors
Constructor	Description
`OpChain(OpChainExecutionContext context, MultiStageOperator root)`
`OpChain(OpChainExecutionContext context, MultiStageOperator root, Consumer<OpChainId> finishCallback)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`cancel(Throwable e)`	cancel() is called when execution runs into error.
`void`	`close()`	close() is called when we finish execution successfully.
`OpChainId`	`getId()`
`Operator<TransferableBlock>`	`getRoot()`
`OpChainStats`	`getStats()`
`String`	`toString()`

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

- Constructor Detail
  - OpChain
```
public OpChain(OpChainExecutionContext context,
               MultiStageOperator root)
```
  - OpChain
```
public OpChain(OpChainExecutionContext context,
               MultiStageOperator root,
               Consumer<OpChainId> finishCallback)
```
- Method Detail
  - getId
```
public OpChainId getId()
```
  - getStats
```
public OpChainStats getStats()
```
  - getRoot
```
public Operator<TransferableBlock> getRoot()
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - close
```
public void close()
```
    close() is called when we finish execution successfully. Once the OpChain is being executed, this method should only be called from the thread that is actually executing it.
    
    Specified by:
    
    close in interface AutoCloseable
  - cancel
```
public void cancel(Throwable e)
```
    cancel() is called when execution runs into error. Once the OpChain is being executed, this method should only be called from the thread that is actually executing it.
    
    Parameters:
    
    e -