com.lucidworks.querying.api

Class QueryStageBase<T extends QueryStageConfig>

java.lang.Object

com.lucidworks.querying.api.QueryStageBase<T>

Type Parameters:

T - query stage configuration class

All Implemented Interfaces:

QueryStage<T>

public abstract class QueryStageBase<T extends QueryStageConfig>
extends java.lang.Object
implements QueryStage<T>

Convenient base class for query pipeline stage containing default initialization logic. Extend this class to implement custom query pipeline stage:

  @Stage(type = "myStage", configClass = MyStageConfig.class)
 public class MyStage extends QueryStageBase<MyStageConfig> {

    @Override
   public QueryRequestAndResponse process(QueryRequestAndResponse query, Context context) {
     // get configuration
     String myBlobId = config.myBlobdId();

     // call Fusion API methods
     fusion.blobs().getBlobContent(myBlobId);

     // further query processing logic
   }
 }
 

Field Summary

Fields

Modifier and Type	Field and Description
protected T	config
protected Fusion	fusion

Constructor Summary

Constructors

Constructor and Description
QueryStageBase()

Method Summary

Modifier and Type	Method and Description
void	init(T config, Fusion fusion) Stage initialization callback.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.lucidworks.querying.api.QueryStage

process, process

Field Detail

fusion

protected Fusion fusion

config

protected T extends QueryStageConfig config

Constructor Detail

QueryStageBase

public QueryStageBase()

Method Detail

init

public void init(T config,
                 Fusion fusion)

Description copied from interface: QueryStage

Stage initialization callback. This method will be called by Fusion when query stage instance is created and before 'process' method is called. Stage configuration will be passed by Fusion as QueryStageConfig instance. Additionally Fusion interface instance will be passed to allow calling Fusion API from the query stage.

Specified by:

init in interface QueryStage<T extends QueryStageConfig>

Parameters:

config - query pipeline stage configuration

fusion - Fusion API instance