StreamingSession (Eclipse Ditto :: Services :: Gateway :: Streaming 1.2.1 API)

java.lang.Object
- org.eclipse.ditto.services.gateway.streaming.actors.StreamingSession

```
public final class StreamingSession
extends Object
```
Store of the needed information about a streaming session of a single streaming type.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Optional<org.eclipse.ditto.json.JsonFieldSelector>`	`getExtraFields()`
`List<String>`	`getNamespaces()`
`boolean`	`matchesFilter(org.eclipse.ditto.model.things.Thing thing)`	Test whether a thing matches the filter defined in this session.
`org.eclipse.ditto.model.things.Thing`	`mergeThingWithExtra(org.eclipse.ditto.signals.base.Signal<?> signal, org.eclipse.ditto.json.JsonObject extra)`	Merge any thing information in a signal event together with extra fields from signal enrichment.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getNamespaces
```
public List<String> getNamespaces()
```
    Returns:
    
    namespaces of the session.
  - getExtraFields
```
public Optional<org.eclipse.ditto.json.JsonFieldSelector> getExtraFields()
```
    Returns:
    
    extra fields of the session if any is given.
  - mergeThingWithExtra
```
public org.eclipse.ditto.model.things.Thing mergeThingWithExtra(org.eclipse.ditto.signals.base.Signal<?> signal,
                                                                org.eclipse.ditto.json.JsonObject extra)
```
    Merge any thing information in a signal event together with extra fields from signal enrichment. Thing events contain thing information. All other signals do not contain thing information.
    
    Parameters:
    
    signal - the signal.
    
    extra - extra fields from signal enrichment.
    
    Returns:
    
    the merged thing if thing information exists in any of the 2 sources, or an empty thing otherwise.
  - matchesFilter
```
public boolean matchesFilter(org.eclipse.ditto.model.things.Thing thing)
```
    Test whether a thing matches the filter defined in this session.
    
    Parameters:
    
    thing - the thing.
    
    Returns:
    
    whether the thing passes the filter.