mirror of
https://github.com/CommunitySolidServer/CommunitySolidServer.git
synced 2024-10-03 14:55:10 +00:00
feat: Update LockingResourceStore to use new locking interface
This has as added bonus that, in the case of getRepresentation, the stream will be destroyed with an error in case of a timeout.
This commit is contained in:
Joachim Van Herwegen
parent
077f5d7069
commit
c17402517e
@ -1,11 +1,10 @@
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import type { Readable } from 'stream';
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import type { Patch } from '../ldp/http/Patch';
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import { BasicRepresentation } from '../ldp/representation/BasicRepresentation';
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import type { Representation } from '../ldp/representation/Representation';
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import type { RepresentationPreferences } from '../ldp/representation/RepresentationPreferences';
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import type { ResourceIdentifier } from '../ldp/representation/ResourceIdentifier';
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import { getLoggerFor } from '../logging/LogUtil';
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import type { Guarded } from '../util/GuardedStream';
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import type { ExpiringLock } from '../util/locking/ExpiringLock';
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import type { ExpiringResourceLocker } from '../util/locking/ExpiringResourceLocker';
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import type { AtomicResourceStore } from './AtomicResourceStore';
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import type { Conditions } from './Conditions';
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@ -14,6 +13,7 @@ import type { ResourceStore } from './ResourceStore';
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/**
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* Store that for every call acquires a lock before executing it on the requested resource,
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* and releases it afterwards.
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* In case the request returns a Representation the lock will only be released when the data stream is finished.
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*/
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export class LockingResourceStore implements AtomicResourceStore {
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protected readonly logger = getLoggerFor(this);
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@ -34,105 +34,103 @@ export class LockingResourceStore implements AtomicResourceStore {
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public async addResource(container: ResourceIdentifier, representation: Representation,
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conditions?: Conditions): Promise<ResourceIdentifier> {
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return this.lockedRun(container,
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return this.locks.withWriteLock(container,
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async(): Promise<ResourceIdentifier> => this.source.addResource(container, representation, conditions));
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}
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public async setRepresentation(identifier: ResourceIdentifier, representation: Representation,
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conditions?: Conditions): Promise<void> {
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return this.lockedRun(identifier,
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return this.locks.withWriteLock(identifier,
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async(): Promise<void> => this.source.setRepresentation(identifier, representation, conditions));
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}
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public async deleteResource(identifier: ResourceIdentifier, conditions?: Conditions): Promise<void> {
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return this.lockedRun(identifier, async(): Promise<void> => this.source.deleteResource(identifier, conditions));
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return this.locks.withWriteLock(identifier,
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async(): Promise<void> => this.source.deleteResource(identifier, conditions));
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}
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public async modifyResource(identifier: ResourceIdentifier, patch: Patch, conditions?: Conditions): Promise<void> {
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return this.lockedRun(identifier,
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return this.locks.withWriteLock(identifier,
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async(): Promise<void> => this.source.modifyResource(identifier, patch, conditions));
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}
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/**
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* Acquires a lock for the identifier and releases it when the function is executed.
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* @param identifier - Identifier that should be locked.
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* @param func - Function to be executed.
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*/
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protected async lockedRun<T>(identifier: ResourceIdentifier, func: () => Promise<T>): Promise<T> {
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const lock = await this.locks.acquire(identifier);
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try {
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return await func();
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} finally {
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await lock.release();
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}
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}
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/**
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* Acquires a lock for the identifier that should return a representation with Readable data and releases it when the
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* Readable is read, closed or results in an error.
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* When using this function, it is required to close the Readable stream when you are ready.
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* Acquires a lock that is only released when all data of the resulting representation data has been read,
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* an error occurs, or the timeout has been triggered.
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* The resulting data stream will be adapted to reset the timer every time data is read.
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*
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* In case the data of the resulting stream is not needed it should be closed to prevent a timeout error.
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*
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* @param identifier - Identifier that should be locked.
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* @param func - Function to be executed.
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* @param whileLocked - Function to be executed while the resource is locked.
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*/
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protected async lockedRepresentationRun(identifier: ResourceIdentifier, func: () => Promise<Representation>):
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protected async lockedRepresentationRun(identifier: ResourceIdentifier, whileLocked: () => Promise<Representation>):
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Promise<Representation> {
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const lock = await this.locks.acquire(identifier);
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let representation;
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try {
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// Create a new Promise that resolves to the resulting Representation
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// while only unlocking when the data has been read (or there's a timeout).
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// Note that we can't just return the result of `withReadLock` since that promise only
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// resolves when the stream is finished, while we want `lockedRepresentationRun` to resolve
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// once we have the Representation.
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// See https://github.com/solid/community-server/pull/536#discussion_r562467957
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return new Promise((resolve, reject): void => {
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let representation: Representation;
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// Make the resource time out to ensure that the lock is always released eventually.
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representation = await func();
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return this.createExpiringRepresentation(representation, lock);
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} finally {
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// If the representation contains a valid Readable, wait for it to be consumed.
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const data = representation?.data;
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if (!data) {
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await lock.release();
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} else {
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// When an error occurs, destroy the readable so the lock is released safely.
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data.on('error', (): void => data.destroy());
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this.locks.withReadLock(identifier, async(maintainLock): Promise<void> => {
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representation = await whileLocked();
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resolve(this.createExpiringRepresentation(representation, maintainLock));
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// An `end` and/or `close` event signals that the readable has been consumed.
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new Promise((resolve): void => {
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data.on('end', resolve);
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data.on('close', resolve);
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}).then((): any => lock.release(), null);
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}
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}
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}
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// Release the lock when an error occurs or the data finished streaming
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await this.waitForStreamToEnd(representation.data);
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}).catch((error): void => {
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// Destroy the source stream in case the lock times out
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representation?.data.destroy(error);
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/**
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* Wraps a representation to make it time out when nothing is read for a certain amount of time.
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*
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* @param source - The representation to wrap
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* @param lock - The lock for the corresponding identifier.
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*/
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protected createExpiringRepresentation(source: Representation, lock: ExpiringLock): Representation {
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return Object.create(source, {
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data: { value: this.createExpiringReadable(source.data, lock) },
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// Let this function return an error in case something went wrong getting the data
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// or in case the timeout happens before `func` returned
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reject(error);
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});
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});
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}
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/**
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* Wraps a readable to make it time out when nothing is read for a certain amount of time.
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* Wraps a representation to make it reset the timeout timer every time data is read.
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*
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* @param source - The readable to wrap
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* @param lock - The lock for the corresponding identifier.
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* @param representation - The representation to wrap
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* @param maintainLock - Function to call to reset the timer.
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*/
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protected createExpiringReadable(source: Guarded<Readable>, lock: ExpiringLock): Readable {
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// Destroy the source when a timeout occurs.
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lock.on('expired', (): void => {
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source.destroy(new Error(`Stream reading timout exceeded`));
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});
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// Spy on the source to renew the lock upon reading.
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return Object.create(source, {
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protected createExpiringRepresentation(representation: Representation, maintainLock: () => void): Representation {
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const source = representation.data;
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// Spy on the source to maintain the lock upon reading.
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const data = Object.create(source, {
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read: {
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value(size: number): any {
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lock.renew();
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maintainLock();
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return source.read(size);
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},
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},
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});
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return new BasicRepresentation(data, representation.metadata, representation.binary);
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}
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/**
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* Returns a promise that resolve when the source stream is finished,
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* either by ending or emitting an error.
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* In the case of an error the stream will be destroyed if it hasn't been already.
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*
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* @param source - The input stream.
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*/
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protected async waitForStreamToEnd(source: Readable): Promise<void> {
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try {
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await new Promise((resolve, reject): void => {
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source.on('error', reject);
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source.on('end', resolve);
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source.on('close', resolve);
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});
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} catch {
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// Destroy the stream in case of errors
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if (!source.destroyed) {
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source.destroy();
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}
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}
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}
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}
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@ -1,4 +1,4 @@
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import streamifyArray from 'streamify-array';
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import type { Readable } from 'stream';
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import { RootContainerInitializer } from '../../src/init/RootContainerInitializer';
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import { BasicRepresentation } from '../../src/ldp/representation/BasicRepresentation';
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import type { Representation } from '../../src/ldp/representation/Representation';
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@ -7,19 +7,30 @@ import { DataAccessorBasedStore } from '../../src/storage/DataAccessorBasedStore
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import { LockingResourceStore } from '../../src/storage/LockingResourceStore';
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import type { ResourceStore } from '../../src/storage/ResourceStore';
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import { APPLICATION_OCTET_STREAM } from '../../src/util/ContentTypes';
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import { InternalServerError } from '../../src/util/errors/InternalServerError';
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import { SingleRootIdentifierStrategy } from '../../src/util/identifiers/SingleRootIdentifierStrategy';
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import type { ExpiringResourceLocker } from '../../src/util/locking/ExpiringResourceLocker';
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import type { ResourceLocker } from '../../src/util/locking/ResourceLocker';
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import { SingleThreadedResourceLocker } from '../../src/util/locking/SingleThreadedResourceLocker';
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import { WrappedExpiringResourceLocker } from '../../src/util/locking/WrappedExpiringResourceLocker';
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import { guardedStreamFrom } from '../../src/util/StreamUtil';
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import { BASE } from './Config';
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jest.useFakeTimers();
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async function readOnce(stream: Readable): Promise<any> {
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return await new Promise((resolve): void => {
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stream.once('data', resolve);
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});
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}
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describe('A LockingResourceStore', (): void => {
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let path: string;
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let store: LockingResourceStore;
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let locker: ResourceLocker;
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let expiringLocker: ExpiringResourceLocker;
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let source: ResourceStore;
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let getRepresentationSpy: jest.SpyInstance;
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beforeEach(async(): Promise<void> => {
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jest.clearAllMocks();
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@ -37,71 +48,56 @@ describe('A LockingResourceStore', (): void => {
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store = new LockingResourceStore(source, expiringLocker);
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// Spy on a real ResourceLocker and ResourceStore instance
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getRepresentationSpy = jest.spyOn(source, 'getRepresentation');
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getRepresentationSpy.mockReturnValue(new Promise((resolve): any => resolve({ data:
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guardedStreamFrom([ 1, 2, 3 ]) } as Representation)));
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// Make sure something is in the store before we read from it in our tests.
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await store.setRepresentation({ path }, new BasicRepresentation([ 1, 2, 3 ], APPLICATION_OCTET_STREAM));
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await source.setRepresentation({ path }, new BasicRepresentation([ 1, 2, 3 ], APPLICATION_OCTET_STREAM));
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});
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it('destroys the stream when nothing is read after 1000ms.', async(): Promise<void> => {
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jest.useFakeTimers();
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// Spy on a real ResourceLocker and ResourceStore instance
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const acquireSpy = jest.spyOn(expiringLocker, 'acquire');
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const getRepresentationSpy = jest.spyOn(source, 'getRepresentation');
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getRepresentationSpy.mockReturnValue(new Promise((resolve): any => resolve({ data:
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streamifyArray([ 1, 2, 3 ]) } as Representation)));
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const representation = await store.getRepresentation({ path }, {});
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const errorCallback = jest.fn();
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representation.data.on('error', errorCallback);
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// Wait 1000ms and read
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jest.advanceTimersByTime(1000);
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expect(representation.data.read()).toBeNull();
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await new Promise(setImmediate);
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expect(representation.data.destroyed).toBe(true);
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// Verify a timeout error was thrown
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await new Promise((resolve): any => setImmediate(resolve));
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expect(errorCallback).toHaveBeenCalledTimes(1);
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expect(errorCallback).toHaveBeenLastCalledWith(new Error('Stream reading timout exceeded'));
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expect(errorCallback).toHaveBeenLastCalledWith(new InternalServerError(`Lock expired after 1000ms on ${path}`));
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// Verify the lock was acquired and released at the right time
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expect(acquireSpy).toHaveBeenCalledTimes(1);
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expect(acquireSpy).toHaveBeenLastCalledWith({ path });
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expect(getRepresentationSpy).toHaveBeenCalledTimes(1);
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});
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it('destroys the stream when pauses between reads exceed 1000ms.', async(): Promise<void> => {
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jest.useFakeTimers();
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// Spy on a real ResourceLocker and ResourceStore instance
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const acquireSpy = jest.spyOn(expiringLocker, 'acquire');
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const getRepresentationSpy = jest.spyOn(source, 'getRepresentation');
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getRepresentationSpy.mockReturnValue(new Promise((resolve): any => resolve({ data:
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streamifyArray([ 1, 2, 3 ]) } as Representation)));
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const representation = await store.getRepresentation({ path }, {});
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const errorCallback = jest.fn();
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representation.data.on('error', errorCallback);
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// Wait 750ms and read
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jest.advanceTimersByTime(750);
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expect(representation.data.read()).toBe(1);
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await expect(readOnce(representation.data)).resolves.toBe(1);
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// Wait 750ms and read
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jest.advanceTimersByTime(750);
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expect(representation.data.read()).toBe(2);
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await expect(readOnce(representation.data)).resolves.toBe(2);
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// Wait 1000ms and watch the stream be destroyed
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jest.advanceTimersByTime(1000);
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expect(representation.data.read()).toBeNull();
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await new Promise(setImmediate);
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expect(representation.data.destroyed).toBe(true);
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// Verify a timeout error was thrown
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await new Promise((resolve): any => setImmediate(resolve));
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expect(errorCallback).toHaveBeenCalledTimes(1);
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expect(errorCallback).toHaveBeenLastCalledWith(new Error('Stream reading timout exceeded'));
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expect(errorCallback).toHaveBeenLastCalledWith(new InternalServerError(`Lock expired after 1000ms on ${path}`));
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// Verify the lock was acquired and released at the right time
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expect(acquireSpy).toHaveBeenCalledTimes(1);
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expect(acquireSpy).toHaveBeenLastCalledWith({ path });
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expect(getRepresentationSpy).toHaveBeenCalledTimes(1);
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});
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});
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@ -1,174 +1,169 @@
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import type { EventEmitter } from 'events';
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import streamifyArray from 'streamify-array';
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import { EventEmitter } from 'events';
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import type { Patch } from '../../../src/ldp/http/Patch';
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import type { Representation } from '../../../src/ldp/representation/Representation';
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import type { ResourceIdentifier } from '../../../src/ldp/representation/ResourceIdentifier';
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import { LockingResourceStore } from '../../../src/storage/LockingResourceStore';
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import type { ResourceStore } from '../../../src/storage/ResourceStore';
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import type { ExpiringLock } from '../../../src/util/locking/ExpiringLock';
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import type { ExpiringResourceLocker } from '../../../src/util/locking/ExpiringResourceLocker';
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import { guardedStreamFrom } from '../../../src/util/StreamUtil';
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function emptyFn(): void {
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// Empty
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}
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describe('A LockingResourceStore', (): void => {
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let store: LockingResourceStore;
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let locker: ExpiringResourceLocker;
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let lock: ExpiringLock;
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let release: () => Promise<void>;
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let renew: () => void;
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let source: ResourceStore;
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let order: string[];
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let funcOnEmit: () => any;
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let timeoutTrigger: EventEmitter;
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beforeEach(async(): Promise<void> => {
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jest.clearAllMocks();
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order = [];
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function delayedResolve(resolve: (value: any) => void, name: string, resolveValue?: any): void {
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// `setImmediate` is introduced to make sure the promise doesn't execute immediately
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setImmediate((): void => {
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function addOrder<T>(name: string, input?: T): T | undefined {
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order.push(name);
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resolve(resolveValue);
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});
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return input;
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}
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const readable = streamifyArray([ 1, 2, 3 ]);
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const readable = guardedStreamFrom([ 1, 2, 3 ]);
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const { destroy } = readable;
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readable.destroy = jest.fn((error): void => destroy.call(readable, error));
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source = {
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getRepresentation: jest.fn(async(): Promise<any> =>
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new Promise((resolve): any => delayedResolve(resolve, 'getRepresentation', { data: readable } as
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Representation))),
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addResource: jest.fn(async(): Promise<any> =>
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new Promise((resolve): any => delayedResolve(resolve, 'addResource'))),
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setRepresentation: jest.fn(async(): Promise<any> =>
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new Promise((resolve): any => delayedResolve(resolve, 'setRepresentation'))),
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deleteResource: jest.fn(async(): Promise<any> =>
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new Promise((resolve): any => delayedResolve(resolve, 'deleteResource'))),
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modifyResource: jest.fn(async(): Promise<any> =>
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new Promise((resolve): any => delayedResolve(resolve, 'modifyResource'))),
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getRepresentation: jest.fn((): any => addOrder('getRepresentation', { data: readable } as Representation)),
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addResource: jest.fn((): any => addOrder('addResource')),
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setRepresentation: jest.fn((): any => addOrder('setRepresentation')),
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deleteResource: jest.fn((): any => addOrder('deleteResource')),
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modifyResource: jest.fn((): any => addOrder('modifyResource')),
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};
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release = jest.fn(async(): Promise<any> => order.push('release'));
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renew = jest.fn();
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funcOnEmit = (): any => true;
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timeoutTrigger = new EventEmitter();
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locker = {
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acquire: jest.fn(async(): Promise<any> => {
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order.push('acquire');
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lock = {
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release,
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renew,
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on(event: string, func: () => void): void {
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if (event === 'expired') {
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funcOnEmit = func;
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withReadLock: jest.fn(async <T>(id: ResourceIdentifier,
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whileLocked: (maintainLock: () => void) => T | Promise<T>): Promise<T> => {
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order.push('lock read');
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try {
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// Allows simulating a timeout event
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const timeout = new Promise<never>((resolve, reject): any => timeoutTrigger.on('timeout', (): void => {
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order.push('timeout');
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reject(new Error('timeout'));
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}));
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return await Promise.race([ Promise.resolve(whileLocked(emptyFn)), timeout ]);
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} finally {
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order.push('unlock read');
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}
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},
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emit(event: string): void {
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if (event === 'expired') {
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funcOnEmit();
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}),
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withWriteLock: jest.fn(async <T>(identifier: ResourceIdentifier,
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whileLocked: (maintainLock: () => void) => T | Promise<T>): Promise<T> => {
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order.push('lock write');
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try {
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return await whileLocked(emptyFn);
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} finally {
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order.push('unlock write');
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}
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},
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||||
} as unknown as ExpiringLock;
|
||||
return lock;
|
||||
}),
|
||||
};
|
||||
|
||||
store = new LockingResourceStore(source, locker);
|
||||
});
|
||||
|
||||
async function registerEventOrder(eventSource: EventEmitter, event: string): Promise<void> {
|
||||
await new Promise((resolve): any => {
|
||||
eventSource.prependListener(event, (): any => {
|
||||
function registerEventOrder(eventSource: EventEmitter, event: string): void {
|
||||
eventSource.on(event, (): void => {
|
||||
order.push(event);
|
||||
resolve();
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
it('acquires a lock on the container when adding a representation.', async(): Promise<void> => {
|
||||
await store.addResource({ path: 'path' }, {} as Representation);
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withWriteLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withWriteLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.addResource).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'addResource', 'release' ]);
|
||||
expect(order).toEqual([ 'lock write', 'addResource', 'unlock write' ]);
|
||||
});
|
||||
|
||||
it('acquires a lock on the resource when setting its representation.', async(): Promise<void> => {
|
||||
await store.setRepresentation({ path: 'path' }, {} as Representation);
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withWriteLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withWriteLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.setRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'setRepresentation', 'release' ]);
|
||||
expect(order).toEqual([ 'lock write', 'setRepresentation', 'unlock write' ]);
|
||||
});
|
||||
|
||||
it('acquires a lock on the resource when deleting it.', async(): Promise<void> => {
|
||||
await store.deleteResource({ path: 'path' });
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withWriteLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withWriteLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.deleteResource).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'deleteResource', 'release' ]);
|
||||
expect(order).toEqual([ 'lock write', 'deleteResource', 'unlock write' ]);
|
||||
});
|
||||
|
||||
it('acquires a lock on the resource when modifying its representation.', async(): Promise<void> => {
|
||||
await store.modifyResource({ path: 'path' }, {} as Patch);
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withWriteLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withWriteLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.modifyResource).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'modifyResource', 'release' ]);
|
||||
expect(order).toEqual([ 'lock write', 'modifyResource', 'unlock write' ]);
|
||||
});
|
||||
|
||||
it('releases the lock if an error was thrown.', async(): Promise<void> => {
|
||||
source.getRepresentation = async(): Promise<any> => {
|
||||
order.push('bad get');
|
||||
throw new Error('dummy');
|
||||
};
|
||||
await expect(store.getRepresentation({ path: 'path' }, {})).rejects.toThrow('dummy');
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'release' ]);
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(order).toEqual([ 'lock read', 'bad get', 'unlock read' ]);
|
||||
});
|
||||
|
||||
it('releases the lock on the resource when data has been read.', async(): Promise<void> => {
|
||||
// Read all data from the representation
|
||||
const representation = await store.getRepresentation({ path: 'path' }, {});
|
||||
representation.data.on('data', (): any => true);
|
||||
await registerEventOrder(representation.data, 'end');
|
||||
registerEventOrder(representation.data, 'end');
|
||||
|
||||
// Provide opportunity for async events
|
||||
await new Promise(setImmediate);
|
||||
|
||||
// Verify the lock was acquired and released at the right time
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'getRepresentation', 'end', 'release' ]);
|
||||
expect(order).toEqual([ 'lock read', 'getRepresentation', 'end', 'unlock read' ]);
|
||||
});
|
||||
|
||||
it('destroys the resource and releases the lock when the readable errors.', async(): Promise<void> => {
|
||||
// Make the representation error
|
||||
const representation = await store.getRepresentation({ path: 'path' }, {});
|
||||
// eslint-disable-next-line jest/valid-expect-in-promise
|
||||
Promise.resolve().then((): any =>
|
||||
representation.data.emit('error', new Error('Error on the readable')), null);
|
||||
await registerEventOrder(representation.data, 'error');
|
||||
await registerEventOrder(representation.data, 'close');
|
||||
setImmediate((): any => representation.data.emit('error', new Error('Error on the readable')));
|
||||
registerEventOrder(representation.data, 'error');
|
||||
registerEventOrder(representation.data, 'close');
|
||||
|
||||
// Provide opportunity for async events
|
||||
await new Promise(setImmediate);
|
||||
|
||||
// Verify the lock was acquired and released at the right time
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'getRepresentation', 'error', 'close', 'release' ]);
|
||||
expect(representation.data.destroy).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'lock read', 'getRepresentation', 'error', 'unlock read', 'close' ]);
|
||||
});
|
||||
|
||||
it('releases the lock on the resource when readable is destroyed.', async(): Promise<void> => {
|
||||
// Make the representation close
|
||||
const representation = await store.getRepresentation({ path: 'path' }, {});
|
||||
representation.data.destroy();
|
||||
await registerEventOrder(representation.data, 'close');
|
||||
registerEventOrder(representation.data, 'close');
|
||||
|
||||
// Provide opportunity for async events
|
||||
await new Promise(setImmediate);
|
||||
|
||||
// Verify the lock was acquired and released at the right time
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'getRepresentation', 'close', 'release' ]);
|
||||
expect(order).toEqual([ 'lock read', 'getRepresentation', 'close', 'unlock read' ]);
|
||||
});
|
||||
|
||||
it('releases the lock only once when multiple events are triggered.', async(): Promise<void> => {
|
||||
@ -179,27 +174,52 @@ describe('A LockingResourceStore', (): void => {
|
||||
order.push('end');
|
||||
representation.data.destroy();
|
||||
});
|
||||
await registerEventOrder(representation.data, 'close');
|
||||
registerEventOrder(representation.data, 'close');
|
||||
|
||||
// Provide opportunity for async events
|
||||
await new Promise(setImmediate);
|
||||
|
||||
// Verify the lock was acquired and released at the right time
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'getRepresentation', 'end', 'close', 'release' ]);
|
||||
expect(order).toEqual([ 'lock read', 'getRepresentation', 'end', 'close', 'unlock read' ]);
|
||||
});
|
||||
|
||||
it('releases the lock on the resource when readable times out.', async(): Promise<void> => {
|
||||
// Make the representation time out
|
||||
const representation = await store.getRepresentation({ path: 'path' }, {});
|
||||
lock.emit('expired');
|
||||
await registerEventOrder(representation.data, 'close');
|
||||
registerEventOrder(representation.data, 'close');
|
||||
registerEventOrder(representation.data, 'error');
|
||||
|
||||
timeoutTrigger.emit('timeout');
|
||||
|
||||
// Provide opportunity for async events
|
||||
await new Promise(setImmediate);
|
||||
|
||||
// Verify the lock was acquired and released at the right time
|
||||
expect(locker.acquire).toHaveBeenCalledTimes(1);
|
||||
expect(locker.acquire).toHaveBeenLastCalledWith({ path: 'path' });
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(lock.release).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'acquire', 'getRepresentation', 'close', 'release' ]);
|
||||
expect(representation.data.destroy).toHaveBeenCalledTimes(1);
|
||||
expect(representation.data.destroy).toHaveBeenLastCalledWith(new Error('timeout'));
|
||||
expect(order).toEqual([ 'lock read', 'getRepresentation', 'timeout', 'unlock read', 'error', 'close' ]);
|
||||
});
|
||||
|
||||
it('throws an error if a timeout happens before getting a resource.', async(): Promise<void> => {
|
||||
source.getRepresentation = jest.fn(async(): Promise<any> => {
|
||||
order.push('useless get');
|
||||
// This will never resolve
|
||||
return new Promise(emptyFn);
|
||||
});
|
||||
|
||||
const prom = store.getRepresentation({ path: 'path' }, {});
|
||||
|
||||
timeoutTrigger.emit('timeout');
|
||||
|
||||
await expect(prom).rejects.toThrow(new Error('timeout'));
|
||||
expect(locker.withReadLock).toHaveBeenCalledTimes(1);
|
||||
expect((locker.withReadLock as jest.Mock).mock.calls[0][0]).toEqual({ path: 'path' });
|
||||
expect(source.getRepresentation).toHaveBeenCalledTimes(1);
|
||||
expect(order).toEqual([ 'lock read', 'useless get', 'timeout', 'unlock read' ]);
|
||||
});
|
||||
});
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user