backtype.storm.task
Class GeneralTopologyContext

java.lang.Object
  backtype.storm.task.GeneralTopologyContext

All Implemented Interfaces:

org.json.simple.JSONAware

Direct Known Subclasses:

WorkerTopologyContext

public class GeneralTopologyContext
extends Object
implements org.json.simple.JSONAware

Field Summary

protected Map

_stormConf

Constructor Summary

GeneralTopologyContext(StormTopology topology, Map stormConf, Map<Integer,String> taskToComponent, Map<String,List<Integer>> componentToSortedTasks, Map<String,Map<String,Fields>> componentToStreamToFields, String stormId)

Method Summary

ComponentCommon	getComponentCommon(String componentId)
String	getComponentId(int taskId) Gets the component id for the specified task id.
Set<String>	getComponentIds() Gets a list of all component ids in this topology
Fields	getComponentOutputFields(GlobalStreamId id) Gets the declared output fields for the specified global stream id.
Fields	getComponentOutputFields(String componentId, String streamId) Gets the declared output fields for the specified component/stream.
Set<String>	getComponentStreams(String componentId) Gets the set of streams declared for the specified component.
List<Integer>	getComponentTasks(String componentId) Gets the task ids allocated for the given component id.
StormTopology	getRawTopology() Gets the Thrift object representing the topology.
Map<GlobalStreamId,Grouping>	getSources(String componentId) Gets the declared inputs to the specified component.
String	getStormId() Gets the unique id assigned to this topology.
Map<String,Map<String,Grouping>>	getTargets(String componentId) Gets information about who is consuming the outputs of the specified component, and how.
Map<Integer,String>	getTaskToComponent() Gets a map from task id to component id.
int	maxTopologyMessageTimeout()
String	toJSONString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_stormConf

protected Map _stormConf

Constructor Detail

GeneralTopologyContext

public GeneralTopologyContext(StormTopology topology,
                              Map stormConf,
                              Map<Integer,String> taskToComponent,
                              Map<String,List<Integer>> componentToSortedTasks,
                              Map<String,Map<String,Fields>> componentToStreamToFields,
                              String stormId)

Method Detail

getStormId

public String getStormId()

Gets the unique id assigned to this topology. The id is the storm name with a unique nonce appended to it.

Returns:

the storm id

getRawTopology

public StormTopology getRawTopology()

Gets the Thrift object representing the topology.

Returns:

the Thrift definition representing the topology

getComponentId

public String getComponentId(int taskId)

Gets the component id for the specified task id. The component id maps to a component id specified for a Spout or Bolt in the topology definition.

Parameters:

taskId - the task id

Returns:

the component id for the input task id

getComponentStreams

public Set<String> getComponentStreams(String componentId)

Gets the set of streams declared for the specified component.

getComponentTasks

public List<Integer> getComponentTasks(String componentId)

Gets the task ids allocated for the given component id. The task ids are always returned in ascending order.

getComponentOutputFields

public Fields getComponentOutputFields(String componentId,
                                       String streamId)

Gets the declared output fields for the specified component/stream.

getComponentOutputFields

public Fields getComponentOutputFields(GlobalStreamId id)

Gets the declared output fields for the specified global stream id.

getSources

public Map<GlobalStreamId,Grouping> getSources(String componentId)

Gets the declared inputs to the specified component.

Returns:

A map from subscribed component/stream to the grouping subscribed with.

getTargets

public Map<String,Map<String,Grouping>> getTargets(String componentId)

Gets information about who is consuming the outputs of the specified component, and how.

Returns:

Map from stream id to component id to the Grouping used.

toJSONString

public String toJSONString()

Specified by:

toJSONString in interface org.json.simple.JSONAware

getTaskToComponent

public Map<Integer,String> getTaskToComponent()

Gets a map from task id to component id.

getComponentIds

public Set<String> getComponentIds()

Gets a list of all component ids in this topology

getComponentCommon

public ComponentCommon getComponentCommon(String componentId)

maxTopologyMessageTimeout

public int maxTopologyMessageTimeout()