public abstract static class MqttIO.Read<T> extends PTransform<PBegin,PCollection<T>>
PTransform to read from a MQTT broker.annotations, displayData, name, resourceHints| Constructor and Description |
|---|
Read() |
| Modifier and Type | Method and Description |
|---|---|
PCollection<T> |
expand(PBegin input)
Override this method to specify how this
PTransform should be expanded on the given
InputT. |
void |
populateDisplayData(DisplayData.Builder builder)
Register display data for the given transform or component.
|
MqttIO.Read<T> |
withConnectionConfiguration(MqttIO.ConnectionConfiguration configuration)
Define the MQTT connection configuration used to connect to the MQTT broker.
|
MqttIO.Read<T> |
withMaxNumRecords(long maxNumRecords)
Define the max number of records received by the
MqttIO.Read. |
MqttIO.Read<T> |
withMaxReadTime(Duration maxReadTime)
Define the max read time (duration) while the
MqttIO.Read will receive messages. |
addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, setDisplayData, setResourceHints, toString, validate, validatepublic MqttIO.Read<T> withConnectionConfiguration(MqttIO.ConnectionConfiguration configuration)
public MqttIO.Read<T> withMaxNumRecords(long maxNumRecords)
MqttIO.Read. When this max number of
records is lower than Long.MAX_VALUE, the MqttIO.Read will provide a bounded PCollection.public MqttIO.Read<T> withMaxReadTime(Duration maxReadTime)
MqttIO.Read will receive messages. When this
max read time is not null, the MqttIO.Read will provide a bounded PCollection.public PCollection<T> expand(PBegin input)
PTransformPTransform should be expanded on the given
InputT.
NOTE: This method should not be called directly. Instead apply the PTransform should
be applied to the InputT using the apply method.
Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).
expand in class PTransform<PBegin,PCollection<T>>public void populateDisplayData(DisplayData.Builder builder)
PTransformpopulateDisplayData(DisplayData.Builder) is invoked by Pipeline runners to collect
display data via DisplayData.from(HasDisplayData). Implementations may call super.populateDisplayData(builder) in order to register display data in the current namespace,
but should otherwise use subcomponent.populateDisplayData(builder) to use the namespace
of the subcomponent.
By default, does not register any display data. Implementors may override this method to provide their own display data.
populateDisplayData in interface HasDisplayDatapopulateDisplayData in class PTransform<PBegin,PCollection<T>>builder - The builder to populate with display data.HasDisplayData