XGBoostPass (Nemo Project 0.4 API)

java.lang.Object
- org.apache.nemo.common.pass.Pass
- - org.apache.nemo.compiler.optimizer.pass.compiletime.CompileTimePass
  - - org.apache.nemo.compiler.optimizer.pass.compiletime.annotating.AnnotatingPass
    - - org.apache.nemo.compiler.optimizer.pass.compiletime.annotating.XGBoostPass

All Implemented Interfaces:

java.util.function.Function<IRDAG,IRDAG>
```
public final class XGBoostPass
extends AnnotatingPass
```
Pass for applying XGBoost optimizations.
1. The pass first triggers the client to run the XGBoost script, located under the `ml` python package. 2. The client runs the script, which trains the tree model using the metrics collected before, and constructs a tree model, which then predicts the 'knobs' that minimizes the JCT based on the weights of the leaves (JCT). 3. It receives the results, and in which direction each of the knobs should be optimized, and reconstructs the execution properties in the form that they are tuned. 4. The newly reconstructed execution properties are injected and the workload runs after the optimization.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  XGBoostPass()
  Default constructor.
- Method Summary
  
  All Methods Static Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  IRDAG apply(IRDAG dag)
  
  static void pushMessage(java.lang.String message)
  - Methods inherited from class org.apache.nemo.compiler.optimizer.pass.compiletime.annotating.AnnotatingPass
    getExecutionPropertiesToAnnotate, getPrerequisiteExecutionProperties
  - Methods inherited from class org.apache.nemo.common.pass.Pass
    addCondition, getCondition
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface java.util.function.Function
    andThen, compose

- Constructor Detail
  - XGBoostPass
```
public XGBoostPass()
```
    Default constructor.
- Method Detail
  - apply
```
public IRDAG apply(IRDAG dag)
```
  - pushMessage
```
public static void pushMessage(java.lang.String message)
```
    Parameters:
    
    message - push the message to the message queue.