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queueHandlers.ts
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queueHandlers.ts
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import { InvocationContext } from "@azure/functions";
import {
DequeuedMessageItem,
QueueClient,
QueueDeleteMessageResponse,
QueueServiceClient,
StorageSharedKeyCredential,
} from "@azure/storage-queue";
import { ENV } from "../config";
import {
ReportStreamError,
ReportStreamResponse,
SimpleReportReportStreamResponse,
ReportStreamCallbackRequest,
} from "./types";
const {
REPORT_STREAM_BATCH_MINIMUM,
REPORT_STREAM_BATCH_MAXIMUM,
AZ_STORAGE_ACCOUNT_KEY,
AZ_STORAGE_ACCOUNT_NAME,
AZ_STORAGE_QUEUE_SVC_URL,
} = ENV;
const DEQUEUE_BATCH_SIZE = 32;
const DEQUEUE_TIMEOUT = 60 * 60; // length of time in seconds a message is invisible after being dequeued
const getQueueServiceClient = (() => {
let queueServiceClient: QueueServiceClient;
return function getQueueServiceClientInner() {
if (queueServiceClient !== undefined) {
return queueServiceClient;
}
const credential = new StorageSharedKeyCredential(
AZ_STORAGE_ACCOUNT_NAME,
AZ_STORAGE_ACCOUNT_KEY,
);
queueServiceClient = new QueueServiceClient(
AZ_STORAGE_QUEUE_SVC_URL,
credential,
);
return queueServiceClient;
};
})();
export function getQueueClient(queueName: string) {
return getQueueServiceClient().getQueueClient(queueName);
}
export async function dequeueMessages(
context: InvocationContext,
queueClient: QueueClient,
): Promise<DequeuedMessageItem[]> {
context.log(`Queue: ${queueClient.name}. Receiving messages`);
const messages: DequeuedMessageItem[] = [];
for (
let messagesDequeued = 0;
messagesDequeued < parseInt(REPORT_STREAM_BATCH_MAXIMUM, 10);
messagesDequeued += DEQUEUE_BATCH_SIZE
) {
try {
const dequeueResponse = await queueClient.receiveMessages({
numberOfMessages: DEQUEUE_BATCH_SIZE,
visibilityTimeout: DEQUEUE_TIMEOUT,
});
if (dequeueResponse?.receivedMessageItems.length) {
messages.push(...dequeueResponse.receivedMessageItems);
context.log(
`Queue: ${queueClient.name}. Dequeued ${dequeueResponse.receivedMessageItems.length} messages`,
);
} else {
// There are no more messages on the queue
context.log(`Queue: ${queueClient.name}. Done receiving messages`);
break;
}
} catch (e) {
context.log(`Queue: ${queueClient.name}. Failed to dequeue messages`, e);
}
}
return messages;
}
export async function minimumMessagesAvailable(
context: InvocationContext,
queueClient: QueueClient,
) {
const queueProperties = await queueClient.getProperties();
const approxMessageCount = queueProperties.approximateMessagesCount;
if (approxMessageCount === undefined) {
context.log(
`Queue: ${queueClient.name}. Queue message count is undefined; aborting`,
);
return false;
}
if (approxMessageCount < parseInt(REPORT_STREAM_BATCH_MINIMUM, 10)) {
context.log(
`Queue: ${queueClient.name}. Queue message count of ${approxMessageCount} was < ${REPORT_STREAM_BATCH_MINIMUM} minimum; aborting`,
);
return false;
}
return true;
}
export async function publishToQueue(
queueClient: QueueClient,
messages: DequeuedMessageItem[],
) {
return Promise.all(
messages.map((m) =>
queueClient.sendMessage(Buffer.from(m.messageText).toString("utf-8")),
),
);
}
export async function deleteSuccessfullyParsedMessages(
context: InvocationContext,
queueClient: QueueClient,
messages: DequeuedMessageItem[],
parseFailure: { [k: string]: boolean },
) {
const validMessages: DequeuedMessageItem[] = [];
const deletionPromises: Promise<QueueDeleteMessageResponse>[] = [];
for (const message of messages) {
if (parseFailure[message.messageId]) {
context.log(
`Queue: ${queueClient.name}. Message ${message.messageId} failed to parse; skipping deletion`,
);
} else {
validMessages.push(message);
}
}
for (const message of validMessages) {
if (message.dequeueCount > 1) {
context.log(
`Queue: ${queueClient.name}. Message has been dequeued ${message.dequeueCount} times, possibly sent more than once to RS`,
);
}
deletionPromises.push(
queueClient.deleteMessage(message.messageId, message.popReceipt),
);
}
try {
const promiseValues = await Promise.allSettled(deletionPromises);
for (let i = 0; i < promiseValues.length; i++) {
const promise = promiseValues[i];
const message = validMessages[i];
if (promise.status == "fulfilled") {
const deleteResponse = promise.value;
const testEventId =
JSON.parse(message.messageText)["Result_ID"] ||
getTestEventIdFromFHIRBundle(JSON.parse(message.messageText));
context.log(
`Queue: ${queueClient.name}. Message ${message.messageId} deleted with request id ${deleteResponse.requestId} and has TestEvent id ${testEventId}`,
);
} else {
context.log(
`Queue: ${queueClient.name}. Failed to delete message ${message.messageId} from the queue:`,
);
}
}
} catch (e) {
context.log(
`Queue: ${queueClient.name}. The following error has occurred: ${e}`,
);
}
context.log(`Queue: ${queueClient.name}. Deletion complete`);
}
export async function reportExceptions(
context: InvocationContext,
queueClient: QueueClient,
response: ReportStreamResponse,
eventQueueName: string,
) {
context.log(
`Queue: ${eventQueueName}. ReportStream response errors: ${response.errorCount}`,
);
context.log(
`Queue: ${eventQueueName}. ReportStream response warnings: ${response.warningCount}`,
);
const payloads: SimpleReportReportStreamResponse[] = response.warnings
.flatMap((w) => responsesFrom(eventQueueName, context, w, false))
.concat(
response.errors.flatMap((e) =>
responsesFrom(eventQueueName, context, e, true),
),
);
return Promise.all(
payloads.map((p) =>
queueClient.sendMessage(
Buffer.from(JSON.stringify(p)).toString("base64"),
),
),
);
}
const responsesFrom = function (
queueName: string,
context: InvocationContext,
err: ReportStreamError,
isError: boolean,
): ReportStreamCallbackRequest[] {
if (err.trackingIds) {
return err.trackingIds.map((id) => ({
testEventInternalId: id,
isError,
details: err.message,
queueName: queueName,
}));
} else {
context.log(
`Queue: ${queueName}. ReportStream response ${err.scope} ${
isError ? "error" : "warning"
}: ${err.message}`,
);
return [];
}
};
export function getTestEventIdFromFHIRBundle( // eslint-disable-next-line @typescript-eslint/no-explicit-any
fhirBundle: Record<any, any>,
): string | undefined {
return fhirBundle?.entry?.filter((entry) => {
return entry.resource?.resourceType === "DiagnosticReport";
})?.[0]?.resource.id;
}