org.apache.beam.sdk.io.gcp.healthcare

Class HL7v2IO.Read

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<java.lang.String>,HL7v2IO.Read.Result>

org.apache.beam.sdk.io.gcp.healthcare.HL7v2IO.Read

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

HL7v2IO

public static class HL7v2IO.Read
extends PTransform<PCollection<java.lang.String>,HL7v2IO.Read.Result>

The type Read that reads HL7v2 message contents given a PCollection of message IDs strings.

These could be sourced from any PCollection of Strings but the most popular patterns would be PubsubIO.readStrings() reading a subscription on an HL7v2 Store's notification channel topic or using HL7v2IO.ListHL7v2Messages to list HL7v2 message IDs with an optional filter using Ingest write method. @see .

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HL7v2IO.Read.FetchHL7v2Message PTransform to fetch a message from an Google Cloud Healthcare HL7v2 store based on msgID.
static class	HL7v2IO.Read.Result The type Result includes PCollection of HL7v2Message objects for successfully read results and PCollection of HealthcareIOError objects for failed reads.

Field Summary

Fields

Modifier and Type	Field and Description
static TupleTag<HealthcareIOError<java.lang.String>>	DEAD_LETTER The tag for the deadletter output of HL7v2 Messages.
static TupleTag<HL7v2Message>	OUT The tag for the main output of HL7v2 Messages.

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

annotations, name, resourceHints

Constructor Summary

Constructors

Constructor and Description
Read()

Method Summary

Modifier and Type	Method and Description
HL7v2IO.Read.Result	expand(PCollection<java.lang.String> input) Override this method to specify how this PTransform should be expanded on the given InputT.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Field Detail

OUT

public static final TupleTag<HL7v2Message> OUT

The tag for the main output of HL7v2 Messages.

DEAD_LETTER

public static final TupleTag<HealthcareIOError<java.lang.String>> DEAD_LETTER

The tag for the deadletter output of HL7v2 Messages.

Constructor Detail

Read

public Read()

Method Detail

expand

public HL7v2IO.Read.Result expand(PCollection<java.lang.String> input)

Description copied from class: PTransform

Override this method to specify how this PTransform 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).

Specified by:

expand in class PTransform<PCollection<java.lang.String>,HL7v2IO.Read.Result>