se.laz.casual.jca.inbound.handler.buffer.fielded.FieldedBufferHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of casual-inbound-handler-fielded-buffer Show documentation

Casual JCA - Resource Adapter for Casual middleware.

There is a newer version: 3.3.0

Show newest version

/*
 * Copyright (c) 2017 - 2024, The casual project. All rights reserved.
 *
 * This software is licensed under the MIT license, https://opensource.org/licenses/MIT
 */

package se.laz.casual.jca.inbound.handler.buffer.fielded;

import jakarta.ejb.Stateless;
import se.laz.casual.api.buffer.CasualBufferType;
import se.laz.casual.api.buffer.type.fielded.FieldedTypeBuffer;
import se.laz.casual.api.buffer.type.fielded.marshalling.FieldedTypeBufferProcessor;
import se.laz.casual.jca.inbound.handler.InboundRequest;
import se.laz.casual.jca.inbound.handler.InboundResponse;
import se.laz.casual.jca.inbound.handler.buffer.BufferHandler;
import se.laz.casual.jca.inbound.handler.buffer.InboundRequestException;
import se.laz.casual.jca.inbound.handler.buffer.InboundRequestInfo;
import se.laz.casual.jca.inbound.handler.buffer.ServiceCallInfo;

import java.lang.reflect.Method;

import static se.laz.casual.jca.inbound.handler.buffer.DispatchMethodUtil.methodAccepts;
import static se.laz.casual.jca.inbound.handler.buffer.DispatchMethodUtil.toMethodParams;

@Stateless
public class FieldedBufferHandler implements BufferHandler
{
    @Override
    public boolean canHandleBuffer(String bufferType)
    {
        return CasualBufferType.FIELDED.getName().equals( bufferType );
    }

    @Override
    public ServiceCallInfo fromRequest(InboundRequestInfo requestInfo, InboundRequest request)
    {
        Object[] params;
        Method proxyMethod = requestInfo.getProxyMethod().orElseThrow(() -> new InboundRequestException("Missing proxy method, requestInfo: " + requestInfo));
        Method realMethod =  requestInfo.getRealMethod().orElseThrow(() -> new InboundRequestException("Missing real method, requestInfo: " + requestInfo));
        if( methodAccepts( realMethod, request ) )
        {
            params = toMethodParams( realMethod, request );
        }
        else if( methodAccepts( realMethod, request.getBuffer() ) )
        {
            params = toMethodParams( realMethod, request.getBuffer() );
        }
        else
        {
            FieldedTypeBuffer fieldedBuffer = FieldedTypeBuffer.create( request.getBuffer().getBytes() );
            params = FieldedTypeBufferProcessor.unmarshall(fieldedBuffer, realMethod);
        }
        return ServiceCallInfo.of( proxyMethod, realMethod, params );
    }

    @Override
    public InboundResponse toResponse(ServiceCallInfo info, Object result)
    {
        FieldedTypeBuffer buffer = FieldedTypeBuffer.create();
        if( result != null )
        {
            if( result instanceof InboundResponse response)
            {
                return response;
            }

            buffer = FieldedTypeBufferProcessor.marshall(result);
        }
        return InboundResponse.createBuilder().buffer(buffer).build();
    }
}