@azure/cosmos
Version:
Microsoft Azure Cosmos DB Service Node.js SDK for NOSQL API
72 lines • 4.53 kB
JavaScript
import { QueryRange } from "../../routing/index.js";
import { ChangeFeedStartFrom } from "./ChangeFeedStartFrom.js";
import { ChangeFeedStartFromBeginning } from "./ChangeFeedStartFromBeginning.js";
import { ChangeFeedStartFromContinuation } from "./ChangeFeedStartFromContinuation.js";
import { ChangeFeedStartFromNow } from "./ChangeFeedStartFromNow.js";
import { ChangeFeedStartFromTime } from "./ChangeFeedStartFromTime.js";
import { ChangeFeedResourceType } from "./ChangeFeedEnums.js";
import { ChangeFeedForPartitionKey } from "./ChangeFeedForPartitionKey.js";
import { ErrorResponse } from "../../request/index.js";
import { ChangeFeedForEpkRange } from "./ChangeFeedForEpkRange.js";
import { getIdFromLink, getPathFromLink, ResourceType, Constants } from "../../common/index.js";
import { buildInternalChangeFeedOptions, fetchStartTime, isEpkRange, getEPKRangeForPrefixPartitionKey, } from "./changeFeedUtils.js";
import { isPrefixPartitionKey, isPartitionKey } from "../../utils/typeChecks.js";
export async function buildChangeFeedIterator(cfOptions, clientContext, container, partitionKeyRangeCache) {
const url = container.url;
const path = getPathFromLink(url, ResourceType.item);
const id = getIdFromLink(url);
let changeFeedStartFrom = cfOptions.changeFeedStartFrom;
if (changeFeedStartFrom === undefined) {
changeFeedStartFrom = ChangeFeedStartFrom.Now();
}
if (changeFeedStartFrom instanceof ChangeFeedStartFromContinuation) {
const continuationToken = changeFeedStartFrom.getCfResourceJson();
const resourceType = changeFeedStartFrom.getResourceType();
const internalCfOptions = buildInternalChangeFeedOptions(cfOptions, changeFeedStartFrom.getCfResource());
if (resourceType === ChangeFeedResourceType.PartitionKey &&
isPartitionKey(continuationToken.partitionKey)) {
return new ChangeFeedForPartitionKey(clientContext, container, id, path, continuationToken.partitionKey, internalCfOptions);
}
else if (resourceType === ChangeFeedResourceType.FeedRange) {
return new ChangeFeedForEpkRange(clientContext, container, partitionKeyRangeCache, id, path, url, internalCfOptions, undefined);
}
else {
throw new ErrorResponse("Invalid continuation token.");
}
}
else if (changeFeedStartFrom instanceof ChangeFeedStartFromNow ||
changeFeedStartFrom instanceof ChangeFeedStartFromTime ||
changeFeedStartFrom instanceof ChangeFeedStartFromBeginning) {
const startFromNow = changeFeedStartFrom instanceof ChangeFeedStartFromNow ? true : false;
const startTime = startFromNow ? undefined : fetchStartTime(changeFeedStartFrom);
const internalCfOptions = buildInternalChangeFeedOptions(cfOptions, undefined, startTime, startFromNow);
const cfResource = changeFeedStartFrom.getCfResource();
if (isPartitionKey(cfResource)) {
const partitionKey = cfResource;
const partitionKeyDefinition = await container.getPartitionKeyDefinition();
if (partitionKeyDefinition !== undefined &&
isPrefixPartitionKey(partitionKey, partitionKeyDefinition.resource)) {
const effectiveEPKRange = await getEPKRangeForPrefixPartitionKey(partitionKey);
return new ChangeFeedForEpkRange(clientContext, container, partitionKeyRangeCache, id, path, url, internalCfOptions, effectiveEPKRange);
}
return new ChangeFeedForPartitionKey(clientContext, container, id, path, cfResource, internalCfOptions);
}
else {
let internalCfResource;
if (cfResource === undefined) {
internalCfResource = new QueryRange(Constants.EffectivePartitionKeyConstants.MinimumInclusiveEffectivePartitionKey, Constants.EffectivePartitionKeyConstants.MaximumExclusiveEffectivePartitionKey, true, false);
}
else if (isEpkRange(cfResource)) {
internalCfResource = new QueryRange(cfResource.minInclusive, cfResource.maxExclusive, true, false);
}
else {
throw new ErrorResponse("Invalid feed range.");
}
return new ChangeFeedForEpkRange(clientContext, container, partitionKeyRangeCache, id, path, url, internalCfOptions, internalCfResource);
}
}
else {
throw new ErrorResponse("Invalid change feed start location.");
}
}
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