NemoOptimizer (Nemo Project 0.4 API)

java.lang.Object
- org.apache.nemo.compiler.optimizer.NemoOptimizer

All Implemented Interfaces:

Optimizer
```
@NotThreadSafe
public final class NemoOptimizer
extends java.lang.Object
implements Optimizer
```
An interface for optimizer, which manages the optimization over submitted IR DAGs through Policys. The instance of this class will reside in driver.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`IRDAG`	`optimizeAtCompileTime(IRDAG dag)`	Optimize the submitted DAG at compile time.
`IRDAG`	`optimizeAtRunTime(IRDAG dag, Message message)`	Optimize the submitted DAG at run time.

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

- Method Detail
  - optimizeAtCompileTime
```
public IRDAG optimizeAtCompileTime(IRDAG dag)
```
    Description copied from interface: Optimizer
    
    Optimize the submitted DAG at compile time.
    
    Specified by:
    
    optimizeAtCompileTime in interface Optimizer
    
    Parameters:
    
    dag - the input DAG to optimize.
    
    Returns:
    
    optimized DAG, reshaped or tagged with execution properties.
  - optimizeAtRunTime
```
public IRDAG optimizeAtRunTime(IRDAG dag,
                               Message message)
```
    Description copied from interface: Optimizer
    
    Optimize the submitted DAG at run time.
    
    Specified by:
    
    optimizeAtRunTime in interface Optimizer
    
    Parameters:
    
    dag - input.
    
    message - for optimization.
    
    Returns:
    
    optimized DAG.