Type Parameters:: OID_T - original id type; VID_T - vertex id type; VDATA_T - vertex data type; EDATA_T - edge data type; C - context type

All Superinterfaces:: AppBase<OID_T,VID_T,VDATA_T,EDATA_T,C>

All Known Implementing Classes:: GiraphComputationAdaptor

public interface DefaultAppBase<OID_T,VID_T,VDATA_T,EDATA_T,C extends DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T>>
extends AppBase<OID_T,VID_T,VDATA_T,EDATA_T,C>

The base interface for all sequential PIE apps which work along with IFragment and DefaultMessageManager

To define your sequential graph algorithms, you should implement this interface and provide the corresponding implementation for PEval(IFragment, DefaultContextBase, DefaultMessageManager) and IncEval(IFragment, DefaultContextBase, DefaultMessageManager)

User-defined app shall work along with user-defined context, which should be an implementation of DefaultContextBase.

For example, you can implement your app like this.

 {
         class MyContext implements DefaultContextBase<Long, Long, Long, Double> {
                 public void Init(IFragment<Long, Long, Long, Double> frag,
                                 DefaultMessageManager messageManager, StdVector<FFIByteString> args) {

                 }

                 public void Output(IFragment<Long, Long, Long, Double> frag) {

                 }
         }
         class MyApp implements DefaultAppBase<Long, Long, Long, Double, MyContext> {
                 public void PEval(IFragment<Long, Long, Long, Double> graph,
                                 DefaultContextBase context, DefaultMessageManager messageManager) {

                 }

                 public void IncEval(IFragment<Long, Long, Long, Double> graph,
                                 DefaultContextBase context, DefaultMessageManager messageManager) {

                 }
         }
 }

For more examples, please refer to module com.alibaba.graphscope.grape-demo

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`IncEval(IFragment<OID_T,VID_T,VDATA_T,EDATA_T> graph, DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T> context, DefaultMessageManager messageManager)`	Incremental Evaluation to implement.
`void`	`PEval(IFragment<OID_T,VID_T,VDATA_T,EDATA_T> graph, DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T> context, DefaultMessageManager messageManager)`	Partial Evaluation to implement.

- Method Detail
  - PEval
```
void PEval(IFragment<OID_T,VID_T,VDATA_T,EDATA_T> graph,
           DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T> context,
           DefaultMessageManager messageManager)
```
    Partial Evaluation to implement.
    
    Parameters:
    
    graph - fragment. The graph fragment providing accesses to graph data.
    
    context - context. User defined context which manages data during the whole computations.
    
    messageManager - The message manger which manages messages between fragments.
    
    See Also:
    
    IFragment, DefaultContextBase, DefaultMessageManager
  - IncEval
```
void IncEval(IFragment<OID_T,VID_T,VDATA_T,EDATA_T> graph,
             DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T> context,
             DefaultMessageManager messageManager)
```
    Incremental Evaluation to implement.
    
    Parameters:
    
    graph - fragment. The graph fragment providing accesses to graph data.
    
    context - context. User defined context which manages data during the whole computations.
    
    messageManager - The message manger which manages messages between fragments.
    
    See Also:
    
    IFragment, DefaultContextBase, DefaultMessageManager

Interface DefaultAppBase<OID_T,​VID_T,​VDATA_T,​EDATA_T,​C extends DefaultContextBase<OID_T,​VID_T,​VDATA_T,​EDATA_T>>

Method Summary

Method Detail

PEval

IncEval

Interface DefaultAppBase<OID_T,VID_T,VDATA_T,EDATA_T,C extends DefaultContextBase<OID_T,VID_T,VDATA_T,EDATA_T>>