@Override
  public OperationCode getOperationCode() {
    return OperationCode.REGISTER_INTEREST;
  }
Return the operation associated with the <code>OperationContext</code> object.

@return <code>OperationCode.REGISTER_INTEREST</code>.
geode-core/src/main/java/org/apache/geode/cache/operations/RegisterInterestOperationContext.java