/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package backtype.storm.tuple;
import backtype.storm.generated.GlobalStreamId;
/**
* The tuple is the main data structure in Storm. A tuple is a named list of values, where each value can be any type.
* Tuples are dynamically typed -- the types of the fields do not need to be declared.
* Tuples have helper methods like getInteger and getString to get field values without having to cast the result.
*
* Storm needs to know how to serialize all the values in a tuple.
* By default, Storm knows how to serialize the primitive types, strings, and byte arrays.
* If you want to use another type, you'll need to implement and register a serializer for that type.
* See {@link https://github.com/nathanmarz/storm/wiki/Serialization} for more info.
*/
public interface Tuple extends ITuple {
/**
* Returns the global stream id (component + stream) of this tuple.
*/
GlobalStreamId getSourceGlobalStreamid();
/**
* Gets the id of the component that created this tuple.
*/
String getSourceComponent();
/**
* Gets the id of the task that created this tuple.
*/
int getSourceTask();
/**
* Gets the id of the stream that this tuple was emitted to.
*/
String getSourceStreamId();
/**
* Gets the message id that associated with this tuple.
*/
MessageId getMessageId();
}