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[EPH] Call methods on PartitionProcessor while processing single partition#4467

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ShivangiReja merged 14 commits intoAzure:masterfrom
ShivangiReja:implement_PartitionPump
Jul 30, 2019
Merged

[EPH] Call methods on PartitionProcessor while processing single partition#4467
ShivangiReja merged 14 commits intoAzure:masterfrom
ShivangiReja:implement_PartitionPump

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@ShivangiReja ShivangiReja commented Jul 26, 2019

This change includes a basic working event processor with no load balancing capabilities. It brings up the event processor instance and starts consuming events from single partition. A separate issue will be created to processing multiple partitions from a single EPH instance.

This PR is responsible for:

  • Create a class called PartitionPump which is responsible for

    • creating and maintaining an EventHubConsumer
    • calling methods on a PartitionProcessor as appropriate
      • start(): creates the receiver and begins receiving events in batches for the PartitionProcessor.
      • stop(): closes the receiver and signals to the PartitionProcessor that processing has completed.
  • Added one working sample.

@ShivangiReja ShivangiReja marked this pull request as ready for review July 29, 2019 18:46
@ShivangiReja ShivangiReja requested a review from chradek as a code owner July 29, 2019 18:46
@ShivangiReja ShivangiReja requested a review from ramya-rao-a July 29, 2019 18:57
* @ignore
* log statements for partitionManager
*/
export const partitionPump = debugModule("azure:event-hubs:partitionPump");
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👍

}

async start(partitionId: string): Promise<void> {
if (this._partitionProcessor.initialize) {
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Here it would be safer to replace this check with:

Suggested change
if (this._partitionProcessor.initialize) {
if (typeof this._partitionProcessor.initialize === "function") {

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Added the same check when we create partitionProcessor.

this._isReceiving = false;
try {
if (this._receiver) {
this._receiver.close();
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May still need a .catch on this close since it's an async method. It won't get caught in this try/catch unless you await it.

this._receiver.close();
}
this._abortController.abort();
if (this._partitionProcessor.close) {
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Same here with typeof check:

Suggested change
if (this._partitionProcessor.close) {
if (typeof this._partitionProcessor.close === "function") {

};
const partitionProcessor = this._partitionProcessorFactory(
partitionContext,
new CheckpointManager()
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Shouldnt checkpoint manager take partition context and partition manager in its constructor?

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We didn't implemented CheckpointManager yet. After the implementation I'll update the sample.

PartitionContext
} from "@azure/event-hubs";

class EventProcessorHost {
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Since we are doing quite some naming changes, we should be careful of the terms we use in the samples. Here, I would suggest SimplePartitionProcessor

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Also, we should add the constructor that stores the partition context and then in processEvents use the partitionId and consumer group name in the console.log()

This way, the user will know how to get the "partition" related info when they process events

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Updated!!

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3 participants