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How to use new instance for every new HTTP request in NestJS?
The Next CEO of Stack OverflowHow can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?How to manage a redirect request after a jQuery Ajax callHTTP GET request in JavaScript?How is an HTTP POST request made in node.js?How can I add new array elements at the beginning of an array in Javascript?HTTP GET Request in Node.js ExpressAsync/Await Class ConstructorNestJS with TypeORM: When using custom repository, is a service needed anymore?How use external entities in nestjs project with typeorm?How to get multiple remote schemas stitched with Nestjs and apollo server
I have an API and was trying to send a request. That is working but I noticed that the classes were not destroyed after I received a response. I'm working with nestJS at the moment but nodeJS + expressJS also had this issue when I tried to test.
I'm using following code:
@Injectable()
export class UsersService
s = '';
constructor()
async findAll(): Promise<any>
this.s += ' haha ';
return await this.s;
This returned haha first time haha haha the second time and so on.
I'm not really sure if this is the desired behaviour or may have not configured properly, because I'm just learning nestJS now. I have previously worked with Zend Framework which did not show this behaviour.
Any guidance will be much appreciated.
Thank you.
javascript node.js typescript express nestjs
edited Mar 8 at 16:20
Kim Kern
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
add a comment |
I have an API and was trying to send a request. That is working but I noticed that the classes were not destroyed after I received a response. I'm working with nestJS at the moment but nodeJS + expressJS also had this issue when I tried to test.
I'm using following code:
@Injectable()
export class UsersService
s = '';
constructor()
async findAll(): Promise<any>
this.s += ' haha ';
return await this.s;
This returned haha first time haha haha the second time and so on.
I'm not really sure if this is the desired behaviour or may have not configured properly, because I'm just learning nestJS now. I have previously worked with Zend Framework which did not show this behaviour.
Any guidance will be much appreciated.
Thank you.
javascript node.js typescript express nestjs
edited Mar 8 at 16:20
Kim Kern
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
1
By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28
add a comment |
I have an API and was trying to send a request. That is working but I noticed that the classes were not destroyed after I received a response. I'm working with nestJS at the moment but nodeJS + expressJS also had this issue when I tried to test.
I'm using following code:
@Injectable()
export class UsersService
s = '';
constructor()
async findAll(): Promise<any>
this.s += ' haha ';
return await this.s;
This returned haha first time haha haha the second time and so on.
I'm not really sure if this is the desired behaviour or may have not configured properly, because I'm just learning nestJS now. I have previously worked with Zend Framework which did not show this behaviour.
Any guidance will be much appreciated.
Thank you.
javascript node.js typescript express nestjs
edited Mar 8 at 16:20
Kim Kern
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
I have an API and was trying to send a request. That is working but I noticed that the classes were not destroyed after I received a response. I'm working with nestJS at the moment but nodeJS + expressJS also had this issue when I tried to test.
I'm using following code:
@Injectable()
export class UsersService
s = '';
constructor()
async findAll(): Promise<any>
this.s += ' haha ';
return await this.s;
This returned haha first time haha haha the second time and so on.
I'm not really sure if this is the desired behaviour or may have not configured properly, because I'm just learning nestJS now. I have previously worked with Zend Framework which did not show this behaviour.
Any guidance will be much appreciated.
Thank you.
javascript node.js typescript express nestjs
javascript node.js typescript express nestjs
edited Mar 8 at 16:20
Kim Kern
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
edited Mar 8 at 16:20
Kim Kern
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
edited Mar 8 at 16:20
Kim Kern
10.8k43352
edited Mar 8 at 16:20
Kim Kern
10.8k43352
edited Mar 8 at 16:20
Kim Kern
10.8k43352
10.8k43352
asked Mar 8 at 15:47
SanjuSanju
708628
asked Mar 8 at 15:47
SanjuSanju
708628
asked Mar 8 at 15:47
SanjuSanju
708628
708628
1
By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28
add a comment |
1
By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28
1
1
By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28
By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28
add a comment |
1 Answer
1
active
oldest
votes
With the release of nest.js 6.0, injection scopes were added. With this, you can choose one of the following three scopes for your providers:
SINGLETON: Default behavior. One instance of your provider is used for the whole application
TRANSIENT: A dedicated instance of your provider is created for every provider that injects it.
REQUEST: For each request, a new provider is created. Caution: This behavior will bubble up in your dependency chain. Example: If UsersController (Singleton) injects UsersService (Singleton) that injects OtherService (Request), then both UsersController and UsersService will automatically become request-scoped.
Usage
Either add it to the @Injectable() decorator:
@Injectable( scope: Scope.REQUEST )
export class UsersService
Or set it for custom providers in your module definition:
provide: 'CACHE_MANAGER',
useClass: CacheManager,
scope: Scope.TRANSIENT,
What you are looking for are request-scoped providers. They are not supported in nest v5, see this issue. As for now, all providers are singletons.
They were added with this pull request though and will be part of nest v6. With the new version, we will get transient and per-request scopes.
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:const requestScopedService = new MyService(databaseConnection);
– Kim Kern
Mar 11 at 15:21
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
add a comment |
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With the release of nest.js 6.0, injection scopes were added. With this, you can choose one of the following three scopes for your providers:
SINGLETON: Default behavior. One instance of your provider is used for the whole application
TRANSIENT: A dedicated instance of your provider is created for every provider that injects it.
REQUEST: For each request, a new provider is created. Caution: This behavior will bubble up in your dependency chain. Example: If UsersController (Singleton) injects UsersService (Singleton) that injects OtherService (Request), then both UsersController and UsersService will automatically become request-scoped.
Usage
Either add it to the @Injectable() decorator:
@Injectable( scope: Scope.REQUEST )
export class UsersService
Or set it for custom providers in your module definition:
provide: 'CACHE_MANAGER',
useClass: CacheManager,
scope: Scope.TRANSIENT,
What you are looking for are request-scoped providers. They are not supported in nest v5, see this issue. As for now, all providers are singletons.
They were added with this pull request though and will be part of nest v6. With the new version, we will get transient and per-request scopes.
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:const requestScopedService = new MyService(databaseConnection);
– Kim Kern
Mar 11 at 15:21
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
add a comment |
With the release of nest.js 6.0, injection scopes were added. With this, you can choose one of the following three scopes for your providers:
SINGLETON: Default behavior. One instance of your provider is used for the whole application
TRANSIENT: A dedicated instance of your provider is created for every provider that injects it.
REQUEST: For each request, a new provider is created. Caution: This behavior will bubble up in your dependency chain. Example: If UsersController (Singleton) injects UsersService (Singleton) that injects OtherService (Request), then both UsersController and UsersService will automatically become request-scoped.
Usage
Either add it to the @Injectable() decorator:
@Injectable( scope: Scope.REQUEST )
export class UsersService
Or set it for custom providers in your module definition:
provide: 'CACHE_MANAGER',
useClass: CacheManager,
scope: Scope.TRANSIENT,
What you are looking for are request-scoped providers. They are not supported in nest v5, see this issue. As for now, all providers are singletons.
They were added with this pull request though and will be part of nest v6. With the new version, we will get transient and per-request scopes.
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:const requestScopedService = new MyService(databaseConnection);
– Kim Kern
Mar 11 at 15:21
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
add a comment |
With the release of nest.js 6.0, injection scopes were added. With this, you can choose one of the following three scopes for your providers:
SINGLETON: Default behavior. One instance of your provider is used for the whole application
TRANSIENT: A dedicated instance of your provider is created for every provider that injects it.
REQUEST: For each request, a new provider is created. Caution: This behavior will bubble up in your dependency chain. Example: If UsersController (Singleton) injects UsersService (Singleton) that injects OtherService (Request), then both UsersController and UsersService will automatically become request-scoped.
Usage
Either add it to the @Injectable() decorator:
@Injectable( scope: Scope.REQUEST )
export class UsersService
Or set it for custom providers in your module definition:
provide: 'CACHE_MANAGER',
useClass: CacheManager,
scope: Scope.TRANSIENT,
What you are looking for are request-scoped providers. They are not supported in nest v5, see this issue. As for now, all providers are singletons.
They were added with this pull request though and will be part of nest v6. With the new version, we will get transient and per-request scopes.
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
With the release of nest.js 6.0, injection scopes were added. With this, you can choose one of the following three scopes for your providers:
SINGLETON: Default behavior. One instance of your provider is used for the whole application
TRANSIENT: A dedicated instance of your provider is created for every provider that injects it.
REQUEST: For each request, a new provider is created. Caution: This behavior will bubble up in your dependency chain. Example: If UsersController (Singleton) injects UsersService (Singleton) that injects OtherService (Request), then both UsersController and UsersService will automatically become request-scoped.
Usage
Either add it to the @Injectable() decorator:
@Injectable( scope: Scope.REQUEST )
export class UsersService
Or set it for custom providers in your module definition:
provide: 'CACHE_MANAGER',
useClass: CacheManager,
scope: Scope.TRANSIENT,
What you are looking for are request-scoped providers. They are not supported in nest v5, see this issue. As for now, all providers are singletons.
They were added with this pull request though and will be part of nest v6. With the new version, we will get transient and per-request scopes.
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
edited Mar 18 at 21:47
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
answered Mar 8 at 16:16
Kim KernKim Kern
10.8k43352
10.8k43352
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:const requestScopedService = new MyService(databaseConnection);
– Kim Kern
Mar 11 at 15:21
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
add a comment |
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:const requestScopedService = new MyService(databaseConnection);
– Kim Kern
Mar 11 at 15:21
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
Is there any alternative you could suggest to achieve this behaviour until nest releases the feature?
– Sanju
Mar 11 at 15:18
1
1
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:
const requestScopedService = new MyService(databaseConnection);– Kim Kern
Mar 11 at 15:21
You can always instantiate a service yourself and not rely on dependency injection, e.g. directly in a route method:
const requestScopedService = new MyService(databaseConnection);– Kim Kern
Mar 11 at 15:21
1
1
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Please, see my update :-)
– Kim Kern
Mar 18 at 21:50
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
Sure did! Thank you for the update! :-)
– Sanju
Mar 19 at 6:40
add a comment |
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By design, injectable instances are singletons just like in many IOC frameworks (Spring for instance). This is actually useful if you want to use some cache mechanisms. Why would you want otherwise? For which usecase?
– zenbeni
Mar 9 at 10:28