}
                } else {
                    logger.warn("Failed to send {} to {}. HTTP Status is {}. {}", body, url, response.getHttpStatusCode(),
                            response.getContentAsString());
                }
            } catch (final IOException e) {
                logger.warn("Failed to send {} to {}.", body, url, e);
            }
        }));
    }

    READY,
    NOT_READY,
    DONE,
    FAILED,
  }

  @CheckForNull private T next;

  @CheckForNull
  protected abstract T computeNext();

  @CanIgnoreReturnValue
  @CheckForNull
  protected final T endOfData() {
    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:

      return;
    }
    fail("should have failed");
  }

  public void testEqualsAndSerializableOnReturnValues_serializableButNotEquals() throws Exception {
    try {
      tester.forAllPublicStaticMethods(GoodSerializableFactory.class).testEqualsAndSerializable();
    } catch (AssertionFailedError expected) {
      return;
    }
    fail("should have failed");
  }

import static org.codelibs.core.stream.StreamUtil.split;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Proxy;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

                if (response.getHttpStatusCode() == 200) {
                    logger.info("Flushed config files.");
                } else {
                    logger.warn("Failed to flush config files.");
                }
            } catch (final Exception e) {
                logger.warn("Failed to flush config files.", e);
            }
            break;
        }

    }

    @Override
    public synchronized void failed(State from, Throwable failure) {
      assertEquals(from, Iterables.getLast(stateHistory));
      stateHistory.add(State.FAILED);
      assertEquals(State.FAILED, service.state());
      assertEquals(failure, service.failureCause());
      if (from == State.STARTING) {
        try {
          service.awaitRunning();
          fail();
        } catch (IllegalStateException e) {

        final KeyMatch keyMatch = getKeyMatch(body).map(entity -> {
            try {
                keyMatchService.store(entity);
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);
                throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)));
            }
            return entity;

                switch (saveImage(input, outputFile)) {
                case OK:
                    created = true;
                    break;
                case FAILED:
                    logger.warn("Failed to create thumbnail: {} -> {}", thumbnailId, responseData.getUrl());
                    break;
                case INVALID_SIZE:

                throw new DictionaryException("Failed to write: " + oldItem + " -> " + item, e);
            }
        }

        public void write(final String line) {
            try {
                writer.write(line);
                writer.write(Constants.LINE_SEPARATOR);
            } catch (final IOException e) {
                throw new DictionaryException("Failed to write: " + line, e);
            }
        }

        try {
            urlFilterService.delete(sessionId);
        } catch (final Exception e) {
            logger.warn("Failed to delete url filters: {}", sessionId, e);
        }
        try {
            urlQueueService.delete(sessionId);
        } catch (final Exception e) {
            logger.warn("Failed to delete url queues: {}", sessionId, e);
        }
        try {
            dataService.delete(sessionId);