001/*
002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
003 *
004 * Project and contact information: http://www.cascading.org/
005 *
006 * This file is part of the Cascading project.
007 *
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *     http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 */
020
021package cascading.flow;
022
023/**
024 * Constants to be used as key in {@link FlowStep#getFlowStepDescriptor}.
025 * <p/>
026 * See also {@link FlowDescriptors}.
027 */
028public interface FlowNodeDescriptors
029  {
030  /** String that can be used as a record separator. */
031  String VALUE_SEPARATOR = "\u001E";
032
033  /** Briefly describes the current FlowStep * */
034  String DESCRIPTION = "description";
035
036  /** Code or line numbers to identify the code this node is executing */
037  String TRACE = "trace";
038
039  /** Id of the FlowStep in an external system * */
040  String EXTERNAL_ID = "external_id";
041
042  /** Name of the FlowStep in an external system * */
043  String EXTERNAL_NAME = "external_name";
044
045  /** URL of the FlowStep in an external system * */
046  String EXTERNAL_URL = "external_url";
047  }