Queue<Runnable> tasks = Queues.newArrayDeque();

    @Override
    public void execute(Runnable command) {
      tasks.add(command);
    }

    boolean hasNext() {
      return !tasks.isEmpty();
    }

    void runNext() {
      assertTrue("expected at least one task to run", hasNext());
      tasks.remove().run();
    }

    void runAll() {
      while (hasNext()) {
        runNext();
      }
    }
  }

    public void setMimeType(final String contentType) {
        mimeType = contentType;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(final String url) {
        this.url = url;
    }

    public String getMethod() {
        return method;
    }

    public void setMethod(final String method) {
        this.method = method;
    }

  @Override
  void write(int b);

  @Override
  void write(byte b[]);

  @Override
  void write(byte b[], int off, int len);

  @Override
  void writeBoolean(boolean v);

  @Override
  void writeByte(int v);

  @Override
  void writeShort(int v);

  @Override
  void writeChar(int v);

  @Override
  void writeInt(int v);

  @Override

    public void addExpectedContent(String resourceName, String expectedContent) {
        this.expectedContent.put(resourceName, expectedContent);
    }

    public String[] getSupportedProtocols() {
        return new String[] {"string"};
    }

    @Override
    public void closeConnection() throws ConnectionException {}

    @Override
    public void fillInputData(InputData inputData)

        super(tableDbName);
    }

    @Override
    public void lockForUpdate() {
    }

    @Override
    public DBWay dbway() {
        return null;
    }

    @Override
    protected void doFetchFirst() {
    }

    @Override
    protected void doFetchPage() {
    }

    @Override
    protected void doClearFetchPageClause() {
    }

    @Override

        super(tableDbName);
    }

    @Override
    public void lockForUpdate() {
    }

    @Override
    public DBWay dbway() {
        return null;
    }

    @Override
    protected void doFetchFirst() {
    }

    @Override
    protected void doFetchPage() {
    }

    @Override
    protected void doClearFetchPageClause() {
    }

    @Override

        super(tableDbName);
    }

    @Override
    public void lockForUpdate() {
    }

    @Override
    public DBWay dbway() {
        return null;
    }

    @Override
    protected void doFetchFirst() {
    }

    @Override
    protected void doFetchPage() {
    }

    @Override
    protected void doClearFetchPageClause() {
    }

    @Override

     *
     * @param urlPattern Regular expression that is not crawled
     */
    void addExclude(String urlPattern);

    /**
     * Process an url when it's added as a seed url.
     *
     * @param url URL
     */
    void processUrl(String url);

    /**
     * Clear this filter.
     */
    void clear();

    }

    public void setBusinessCategory(String value) {
        registerModifiedProperty("businessCategory");
        this.businessCategory = value;
    }

    public String getCarLicense() {
        checkSpecifiedProperty("carLicense");
        return convertEmptyToNull(carLicense);
    }

    public void setCarLicense(String value) {

        Thread.setDefaultUncaughtExceptionHandler(eh);
    }

    public void setMaxIndexerErrorCount(final int maxIndexerErrorCount) {
        this.maxIndexerErrorCount = maxIndexerErrorCount;
    }

    public void addDocBoostMatcher(final DocBoostMatcher rule) {
        docBoostMatcherList.add(rule);
    }

    public void setCrawlerList(final List<Crawler> crawlerList) {
        this.crawlerList = crawlerList;