How to use

ProtocolHandlers

in

cascading.bind.catalog.handler

public ProtocolHandlers<Protocol, Format> getProtocolHandlers( Object context )
 {
 if( !this.protocolHandlers.containsKey( context ) )
  this.protocolHandlers.put( context, new ProtocolHandlers<Protocol, Format>() );
 return this.protocolHandlers.get( context );
 }

ProtocolHandler getProtocolHandler( Object context, Protocol protocol )
 {
 return getProtocolHandlers( context ).findHandlerFor( protocol );
 }

public void addProtocolHandlers( Object context, List<ProtocolHandler<Protocol, Format>> protocolHandlers )
 {
 getProtocolHandlers( context ).addAll( protocolHandlers );
 }

public Tap createTapFor( TableDef tableDef, SinkMode sinkMode )
 {
 Protocol protocol = tableDef.getActualProtocol();
 Format format = tableDef.getActualFormat();
 ProtocolHandler<Protocol, Format> protocolHandler = getProtocolHandlers( tableDef.getParentSchema() ).findHandlerFor( protocol );
 FormatHandler<Protocol, Format> formatHandler = getFormatHandlersFor( tableDef.getParentSchema() ).findHandlerFor( protocol, format );
 if( protocolHandler == null )
  throw new IllegalArgumentException( "no protocol handler for protocol: " + protocol );
 if( formatHandler == null )
  throw new IllegalArgumentException( "no format handler for format: " + format );
 // do not make loadable, tap loadable will handle dynamic classloader issues
 Scheme scheme = formatHandler.createScheme( tableDef.getStereotype(), protocol, format );
 Resource<Protocol, Format, SinkMode> resource = tableDef.getResourceWith( sinkMode );
 return ( (LingualProtocolHandler) protocolHandler ).createLoadableTap( scheme, resource );
 }

public ProtocolHandlers<Protocol, Format> getProtocolHandlers( SchemaDef schemaDef )
 {
 if( schemaDef == null )
  schemaDef = schemaCatalog.getRootSchemaDef();
 return new ProtocolHandlers<Protocol, Format>( createProtocolHandlers( schemaDef ) );
 }

private Tap createTapFor( SchemaDef schemaDef, Stereotype<Protocol, Format> stereotype, Resource<Protocol, Format, SinkMode> resource )
 {
 ProtocolHandler<Protocol, Format> protocolHandler = getProtocolHandlers( schemaDef ).findHandlerFor( resource.getProtocol() );
 FormatHandler<Protocol, Format> formatHandler = getFormatHandlersFor( schemaDef ).findHandlerFor( resource.getProtocol(), resource.getFormat() );
 if( protocolHandler == null || formatHandler == null )
  return null;
 // do not make loadable, tap loadable will handle dynamic classloader issues
 Scheme scheme = formatHandler.createScheme( stereotype, resource.getProtocol(), resource.getFormat() );
 return ( (LingualProtocolHandler) protocolHandler ).createLoadableTap( scheme, resource );
 }