odata2-jpa-processor/jpa-ref/src/main/java/org/apache/olingo/odata2/jpa/processor/ref/util/CustomODataJPAProcessor.java

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package org.apache.olingo.odata2.jpa.processor.ref.util;

import org.apache.olingo.odata2.api.exception.ODataException;
import org.apache.olingo.odata2.api.processor.ODataResponse;
import org.apache.olingo.odata2.api.uri.info.GetEntitySetUriInfo;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPADefaultProcessor;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;

public class CustomODataJPAProcessor extends ODataJPADefaultProcessor {

  private static final Logger LOG = Logger.getLogger(CustomODataJPAProcessor.class.getName());
  private static final AtomicInteger READ_COUNT = new AtomicInteger(0);

  public CustomODataJPAProcessor(ODataJPAContext oDataJPAContext) {
    super(oDataJPAContext);
  }

  @Override
  public ODataResponse readEntitySet(final GetEntitySetUriInfo uriParserResultView, final String contentType)
      throws ODataException {

    int readCount = READ_COUNT.incrementAndGet();
    LOG.log(Level.INFO, "Start read access number '" + readCount + "' for '" +
        uriParserResultView.getTargetEntitySet().getName() + "'.");
    long start = System.currentTimeMillis();
    List<Object> jpaEntities = jpaProcessor.process(uriParserResultView);
    ODataResponse oDataResponse = responseBuilder.build(uriParserResultView, jpaEntities, contentType);
    long duration = System.currentTimeMillis() - start;
    LOG.log(Level.INFO, "Finished read access number '" + readCount + "' after '" + duration + "'ms.");

    return oDataResponse;
  }

}