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https://issues.apache.org/jira/browse/BEAM-10936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549067#comment-17549067
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Danny McCormick commented on BEAM-10936:
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This issue has been migrated to https://github.com/apache/beam/issues/20675
> PubsubIO can't provide PubsubClientFactory
> --------------------------------------------
>
> Key: BEAM-10936
> URL: https://issues.apache.org/jira/browse/BEAM-10936
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.19.0, 2.20.0, 2.21.0, 2.22.0, 2.23.0
> Environment: Dataflow
> Reporter: Jian Zheng
> Priority: P3
>
> PubsubIO provides a method to pass the PubsubClientFactory.
> {code:java}
> /**
> * The default client to write to Pub/Sub is the {@link PubsubJsonClient},
> created by the {@link
> * PubsubJsonClient.PubsubJsonClientFactory}. This function allows to change
> the Pub/Sub client
> * by providing another {@link PubsubClient.PubsubClientFactory} like the
> {@link
> * PubsubGrpcClientFactory}.
> */
> public Read<T> withClientFactory(PubsubClient.PubsubClientFactory factory) {
> return toBuilder().setPubsubClientFactory(factory).build();
> }
> {code}
> The comment here explains that can pass a PubsubClient.
> However, the IncomingMessage used in the {color:#ff0000}pull(){color} method
> of PubsubClient's abstract method is actually an abstract internal class, in
> other words, the abstract class PubsubClient can't be extended in external of
> the {color:#ff0000}org.apache.beam.sdk.io.gcp.pubsub{color} package.
> To overcome the above problem, I created the
> org.apache.beam.sdk.io.gcp.pubsub directory to extend PubsubClient and passes
> it to the {color:#ff0000}PubsubIO.withClientFactory{color} method.
> This seems to run locally without any problems, but when I submit my job to
> Dataflow, the withClientFactory method is useless and be replaced with the
> default PubsubJsonClientFactory.
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