Module org.apache.jena.arq

Package org.apache.jena.sparql.service

Class ServiceExec

java.lang.Object

org.apache.jena.sparql.service.ServiceExec

public class ServiceExec
extends Object

Entry into the service executor from SPARQL queries.

Constructor Summary

Constructors

Constructor	Description
ServiceExec()

Method Summary

Modifier and Type	Method	Description
static QueryIterator	exec(OpService opExecute, OpService original, Binding binding, ExecutionContext execCxt)	Execute an OpService w.r.t. the execCxt's service executor registry - concretely its single chain which operates on a per-binding basis.
static QueryIterator	exec(OpService opService, QueryIterator input, ExecutionContext execCxt)	Execute an OpService w.r.t. the execCxt's service executor registry.

Methods inherited from class java.lang.Object

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

Constructor Details

ServiceExec

public ServiceExec()

Method Details

exec

public static QueryIterator exec(OpService opService,
 QueryIterator input,
 ExecutionContext execCxt)

Execute an OpService w.r.t. the execCxt's service executor registry. This is the route from OpExecutor. This method can also be used to pass a modified request through the whole service executor chain, as exemplified below:

 ServiceExecutorRegistry.get().addBulkLink((opService, input, execCxt, chain) -> {
     if (canHandle(opService)) {
         OpService modifiedOp = modifyOp(opService);
         // Forward the request to the beginning of the chain.
         return ServiceExec.exec(modifiedOp, input, execCxt);
     } else {
         // Forward the request to the remaining handlers in the chain.
         return chain.createExecution(opService, input, execCxt);
     }
 });
 

exec

public static QueryIterator exec(OpService opExecute,
 OpService original,
 Binding binding,
 ExecutionContext execCxt)

Execute an OpService w.r.t. the execCxt's service executor registry - concretely its single chain which operates on a per-binding basis.