@grpc/grpc-js

@grpc/grpc-js

Version 1.10.6
Published 21 days ago
1.84 MB
2 dependencies
Apache-2.0 license

Install

npm i @grpc/grpc-js

yarn add @grpc/grpc-js

pnpm add @grpc/grpc-js

Overview

gRPC Library for Node - pure JS implementation

Index

Variables

variable credentials

const credentials: {
    combineChannelCredentials: (
        channelCredentials: ChannelCredentials,
        ...callCredentials: CallCredentials[]
    ) => ChannelCredentials;
    combineCallCredentials: (
        first: CallCredentials,
        ...additional: CallCredentials[]
    ) => CallCredentials;
    createInsecure: typeof ChannelCredentials.createInsecure;
    createSsl: typeof ChannelCredentials.createSsl;
    createFromSecureContext: typeof ChannelCredentials.createFromSecureContext;
    createFromMetadataGenerator: typeof CallCredentials.createFromMetadataGenerator;
    createFromGoogleCredential: typeof CallCredentials.createFromGoogleCredential;
    createEmpty: typeof CallCredentials.createEmpty;
};

** Client Credentials ***

Functions

function addAdminServicesToServer

addAdminServicesToServer: (server: Server) => void;

function closeClient

closeClient: (client: Client) => void;

Close a Client object.
Parameter client
The client to close.

function getChannelzHandlers

getChannelzHandlers: () => ChannelzHandlers;

function getChannelzServiceDefinition

getChannelzServiceDefinition: () => ChannelzDefinition;

function getClientChannel

getClientChannel: (client: Client) => Channel;

function load

load: (filename: any, format: any, options: any) => never;

function loadObject

loadObject: (value: any, options: any) => never;

** Unimplemented function stubs ***

function loadPackageDefinition

loadPackageDefinition: (packageDef: PackageDefinition) => GrpcObject;

Load a gRPC package definition as a gRPC object hierarchy.
Parameter packageDef
The package definition object. The resulting gRPC object.

function makeClientConstructor

makeClientConstructor: (
    methods: ServiceDefinition,
    serviceName: string,
    classOptions?: {}
) => ServiceClientConstructor;

Creates a constructor for a client with the given methods, as specified in the methods argument. The resulting class will have an instance method for each method in the service, which is a partial application of one of the [Client]grpc.Client request methods, depending on requestSerialize and responseSerialize, with the method, serialize, and deserialize arguments predefined.
Parameter methods
An object mapping method names to method attributes
Parameter serviceName
The fully qualified name of the service
Parameter classOptions
An options object. New client constructor, which is a subclass of grpc.Client, and has the same arguments as that constructor.

function makeGenericClientConstructor

makeGenericClientConstructor: (
    methods: ServiceDefinition,
    serviceName: string,
    classOptions?: {}
) => ServiceClientConstructor;

Creates a constructor for a client with the given methods, as specified in the methods argument. The resulting class will have an instance method for each method in the service, which is a partial application of one of the [Client]grpc.Client request methods, depending on requestSerialize and responseSerialize, with the method, serialize, and deserialize arguments predefined.
Parameter methods
An object mapping method names to method attributes
Parameter serviceName
The fully qualified name of the service
Parameter classOptions
An options object. New client constructor, which is a subclass of grpc.Client, and has the same arguments as that constructor.

function setLogger

setLogger: (logger: Partial<Console>) => void;

function setLogVerbosity

setLogVerbosity: (verbosity: LogVerbosity) => void;

function waitForClientReady

waitForClientReady: (
    client: Client,
    deadline: Date | number,
    callback: (error?: Error) => void
) => void;

Classes

class CallCredentials

abstract class CallCredentials {}

A class that represents a generic method of adding authentication-related metadata on a per-request basis.

method compose

abstract compose: (callCredentials: CallCredentials) => CallCredentials;

Creates a new CallCredentials object from properties of both this and another CallCredentials object. This object's metadata generator will be called first.
Parameter callCredentials
The other CallCredentials object.

method createEmpty

static createEmpty: () => CallCredentials;

method createFromGoogleCredential

static createFromGoogleCredential: (
    googleCredentials: OAuth2Client
) => CallCredentials;

Create a gRPC credential from a Google credential object.
Parameter googleCredentials
The authentication client to use. The resulting CallCredentials object.

method createFromMetadataGenerator

static createFromMetadataGenerator: (
    metadataGenerator: CallMetadataGenerator
) => CallCredentials;

Creates a new CallCredentials object from a given function that generates Metadata objects.
Parameter metadataGenerator
A function that accepts a set of options, and generates a Metadata object based on these options, which is passed back to the caller via a supplied (err, metadata) callback.

method generateMetadata

abstract generateMetadata: (options: CallMetadataOptions) => Promise<Metadata>;

Asynchronously generates a new Metadata object.
Parameter options
Options used in generating the Metadata object.

class Channel

class ChannelImplementation implements Channel {}

constructor

constructor(
    target: string,
    credentials: ChannelCredentials,
    options: ChannelOptions
);

method close

close: () => void;

method createCall

createCall: (
    method: string,
    deadline: Deadline,
    host: string | null | undefined,
    parentCall: ServerSurfaceCall | null,
    propagateFlags: number | null | undefined
) => Call;

method getChannelzRef

getChannelzRef: () => ChannelRef;

Get the channelz reference object for this channel. The returned value is garbage if channelz is disabled for this channel.
Returns

method getConnectivityState

getConnectivityState: (tryToConnect: boolean) => ConnectivityState;

method getTarget

getTarget: () => string;

method watchConnectivityState

watchConnectivityState: (
    currentState: ConnectivityState,
    deadline: Date | number,
    callback: (error?: Error) => void
) => void;

class ChannelCredentials

abstract class ChannelCredentials {}

A class that contains credentials for communicating over a channel, as well as a set of per-call credentials, which are applied to every method call made over a channel initialized with an instance of this class.

constructor

protected constructor(callCredentials?: CallCredentials);

property callCredentials

protected callCredentials: CallCredentials;

method compose

abstract compose: (callCredentials: CallCredentials) => ChannelCredentials;

Returns a copy of this object with the included set of per-call credentials expanded to include callCredentials.
Parameter callCredentials
A CallCredentials object to associate with this instance.

method createFromSecureContext

static createFromSecureContext: (
    secureContext: SecureContext,
    verifyOptions?: VerifyOptions
) => ChannelCredentials;

Return a new ChannelCredentials instance with credentials created using the provided secureContext. The resulting instances can be used to construct a Channel that communicates over TLS. gRPC will not override anything in the provided secureContext, so the environment variables GRPC_SSL_CIPHER_SUITES and GRPC_DEFAULT_SSL_ROOTS_FILE_PATH will not be applied.
Parameter secureContext
The return value of tls.createSecureContext()
Parameter verifyOptions
Additional options to modify certificate verification

method createInsecure

static createInsecure: () => ChannelCredentials;

Return a new ChannelCredentials instance with no credentials.

method createSsl

static createSsl: (
    rootCerts?: Buffer | null,
    privateKey?: Buffer | null,
    certChain?: Buffer | null,
    verifyOptions?: VerifyOptions
) => ChannelCredentials;

Return a new ChannelCredentials instance with a given set of credentials. The resulting instance can be used to construct a Channel that communicates over TLS.
Parameter rootCerts
The root certificate data.
Parameter privateKey
The client certificate private key, if available.
Parameter certChain
The client certificate key chain, if available.
Parameter verifyOptions
Additional options to modify certificate verification

class Client

class Client {}

A generic gRPC client. Primarily useful as a base class for all generated clients.

constructor

constructor(
    address: string,
    credentials: ChannelCredentials,
    options?: ClientOptions
);

method close

close: () => void;

method getChannel

getChannel: () => Channel;

method makeBidiStreamRequest

makeBidiStreamRequest: {
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        metadata: Metadata,
        options?: CallOptions
    ): ClientDuplexStream<RequestType, ResponseType>;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        options?: CallOptions
    ): any;
};

method makeClientStreamRequest

makeClientStreamRequest: {
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        metadata: Metadata,
        options: CallOptions,
        callback: UnaryCallback<ResponseType>
    ): ClientWritableStream<RequestType>;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        metadata: Metadata,
        callback: UnaryCallback<ResponseType>
    ): any;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        options: CallOptions,
        callback: UnaryCallback<ResponseType>
    ): any;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        callback: UnaryCallback<ResponseType>
    ): any;
};

method makeServerStreamRequest

makeServerStreamRequest: {
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        metadata: Metadata,
        options?: CallOptions
    ): ClientReadableStream<ResponseType>;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        options?: CallOptions
    ): any;
};

method makeUnaryRequest

makeUnaryRequest: {
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        metadata: Metadata,
        options: CallOptions,
        callback: UnaryCallback<ResponseType>
    ): ClientUnaryCall;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        metadata: Metadata,
        callback: UnaryCallback<ResponseType>
    ): any;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        options: CallOptions,
        callback: UnaryCallback<ResponseType>
    ): any;
    <RequestType, ResponseType>(
        method: string,
        serialize: (value: RequestType) => Buffer,
        deserialize: (value: Buffer) => ResponseType,
        argument: RequestType,
        callback: UnaryCallback<ResponseType>
    ): any;
};

method waitForReady

waitForReady: (deadline: Deadline, callback: (error?: Error) => void) => void;

class InterceptingCall

class InterceptingCall implements InterceptingCallInterface {}

constructor

constructor(
    nextCall: InterceptingCallInterface,
    requester?: Partial<FullRequester>
);

method cancelWithStatus

cancelWithStatus: (status: Status, details: string) => void;

method getPeer

getPeer: () => string;

method halfClose

halfClose: () => void;

method sendMessage

sendMessage: (message: any) => void;

method sendMessageWithContext

sendMessageWithContext: (context: MessageContext, message: any) => void;

method start

start: (
    metadata: Metadata,
    interceptingListener?: Partial<InterceptingListener>
) => void;

method startRead

startRead: () => void;

class InterceptorConfigurationError

class InterceptorConfigurationError extends Error {}

Error class associated with passing both interceptors and interceptor providers to a client constructor or as call options.

constructor

constructor(message: string);

class ListenerBuilder

class ListenerBuilder {}

method build

build: () => Listener;

method withOnReceiveMessage

withOnReceiveMessage: (onReceiveMessage: MessageListener) => this;

method withOnReceiveMetadata

withOnReceiveMetadata: (onReceiveMetadata: MetadataListener) => this;

method withOnReceiveStatus

withOnReceiveStatus: (onReceiveStatus: StatusListener) => this;

class Metadata

class Metadata {}

A class for storing metadata. Keys are normalized to lowercase ASCII.

constructor

constructor(options?: MetadataOptions);

property internalRepr

protected internalRepr: MetadataObject;

method add

add: (key: string, value: MetadataValue) => void;

Adds the given value for the given key by appending to a list of previous values associated with that key. Normalizes the key.
Parameter key
The key for which a new value should be appended.
Parameter value
The value to add. Must be a buffer if and only if the normalized key ends with '-bin'.

method clone

clone: () => Metadata;

Clones the metadata object. The newly cloned object.

method fromHttp2Headers

static fromHttp2Headers: (headers: http2.IncomingHttpHeaders) => Metadata;

Returns a new Metadata object based fields in a given IncomingHttpHeaders object.
Parameter headers
An IncomingHttpHeaders object.

method get

get: (key: string) => MetadataValue[];

Gets a list of all values associated with the key. Normalizes the key.
Parameter key
The key whose value should be retrieved. A list of values associated with the given key.

method getMap

getMap: () => { [key: string]: any };

Gets a plain object mapping each key to the first value associated with it. This reflects the most common way that people will want to see metadata. A key/value mapping of the metadata.

method getOptions

getOptions: () => MetadataOptions;

method merge

merge: (other: Metadata) => void;

Merges all key-value pairs from a given Metadata object into this one. If both this object and the given object have values in the same key, values from the other Metadata object will be appended to this object's values.
Parameter other
A Metadata object.

method remove

remove: (key: string) => void;

Removes the given key and any associated values. Normalizes the key.
Parameter key
The key whose values should be removed.

method set

set: (key: string, value: MetadataValue) => void;

Sets the given value for the given key by replacing any other values associated with that key. Normalizes the key.
Parameter key
The key to whose value should be set.
Parameter value
The value to set. Must be a buffer if and only if the normalized key ends with '-bin'.

method setOptions

setOptions: (options: MetadataOptions) => void;

method toHttp2Headers

toHttp2Headers: () => http2.OutgoingHttpHeaders;

Creates an OutgoingHttpHeaders object that can be used with the http2 API.

method toJSON

toJSON: () => { [key: string]: any[] };

This modifies the behavior of JSON.stringify to show an object representation of the metadata map.

class RequesterBuilder

class RequesterBuilder {}

method build

build: () => Requester;

method withCancel

withCancel: (cancel: CancelRequester) => this;

method withHalfClose

withHalfClose: (halfClose: CloseRequester) => this;

method withSendMessage

withSendMessage: (sendMessage: MessageRequester) => this;

method withStart

withStart: (start: MetadataRequester) => this;

class ResponderBuilder

class ResponderBuilder {}

method build

build: () => Responder;

method withSendMessage

withSendMessage: (sendMessage: MessageResponder) => this;

method withSendMetadata

withSendMetadata: (sendMetadata: MetadataResponder) => this;

method withSendStatus

withSendStatus: (sendStatus: StatusResponder) => this;

method withStart

withStart: (start: StartResponder) => this;

class Server

class Server {}

constructor

constructor(options?: ServerOptions);

method addHttp2Port

addHttp2Port: () => never;

method addProtoService

addProtoService: () => never;

method addService

addService: (
    service: ServiceDefinition,
    implementation: UntypedServiceImplementation
) => void;

method bind

bind: (port: string, creds: ServerCredentials) => never;

method bindAsync

bindAsync: (
    port: string,
    creds: ServerCredentials,
    callback: (error: Error | null, port: number) => void
) => void;

method drain

drain: (port: string, graceTimeMs: number) => void;

Gracefully close all connections associated with a previously bound port. After the grace time, forcefully close all remaining open connections.
If port 0 was bound, only the actual bound port can be drained. For example, if bindAsync was called with "localhost:0" and the bound port result was 54321, it can be drained as "localhost:54321".
Parameter port
Parameter graceTimeMs
Returns

method forceShutdown

forceShutdown: () => void;

method getChannelzRef

getChannelzRef: () => ServerRef;

Get the channelz reference object for this server. The returned value is garbage if channelz is disabled for this server.
Returns

method register

register: <RequestType, ResponseType>(
    name: string,
    handler: HandleCall<RequestType, ResponseType>,
    serialize: Serialize<ResponseType>,
    deserialize: Deserialize<RequestType>,
    type: string
) => boolean;

method removeService

removeService: (service: ServiceDefinition) => void;

method start

start: () => void;

Deprecated
No longer needed as of version 1.10.x

method tryShutdown

tryShutdown: (callback: (error?: Error) => void) => void;

method unbind

unbind: (port: string) => void;

Unbind a previously bound port, or cancel an in-progress bindAsync operation. If port 0 was bound, only the actual bound port can be unbound. For example, if bindAsync was called with "localhost:0" and the bound port result was 54321, it can be unbound as "localhost:54321".
Parameter port

method unregister

unregister: (name: string) => boolean;

class ServerCredentials

abstract class ServerCredentials {}

method createInsecure

static createInsecure: () => ServerCredentials;

method createSsl

static createSsl: (
    rootCerts: Buffer | null,
    keyCertPairs: KeyCertPair[],
    checkClientCertificate?: boolean
) => ServerCredentials;

class ServerInterceptingCall

class ServerInterceptingCall implements ServerInterceptingCallInterface {}

constructor

constructor(
    nextCall: ServerInterceptingCallInterface,
    responder?: Partial<FullResponder>
);

method getDeadline

getDeadline: () => Deadline;

method getPeer

getPeer: () => string;

method sendMessage

sendMessage: (message: any, callback: () => void) => void;

method sendMetadata

sendMetadata: (metadata: Metadata) => void;

method sendStatus

sendStatus: (status: PartialStatusObject) => void;

method start

start: (listener: InterceptingServerListener) => void;

method startRead

startRead: () => void;

class ServerListenerBuilder

class ServerListenerBuilder {}

method build

build: () => ServerListener;

method withOnCancel

withOnCancel: (onCancel: ServerCancelListener) => this;

method withOnReceiveHalfClose

withOnReceiveHalfClose: (onReceiveHalfClose: ServerHalfCloseListener) => this;

method withOnReceiveMessage

withOnReceiveMessage: (onReceiveMessage: ServerMessageListener) => this;

method withOnReceiveMetadata

withOnReceiveMetadata: (onReceiveMetadata: ServerMetadataListener) => this;

class StatusBuilder

class StatusBuilder {}

A builder for gRPC status objects.

constructor

constructor();

method build

build: () => Partial<StatusObject>;

Builds the status object.

method withCode

withCode: (code: Status) => this;

Adds a status code to the builder.

method withDetails

withDetails: (details: string) => this;

Adds details to the builder.

method withMetadata

withMetadata: (metadata: Metadata) => this;

Adds metadata to the builder.

Interfaces

interface CallInvocationTransformer

interface CallInvocationTransformer {}

call signature

(callProperties: CallProperties<any, any>): CallProperties<any, any>;

interface CallOptions

interface CallOptions {}

property credentials

credentials?: CallCredentials;

property deadline

deadline?: Deadline;

property host

host?: string;

property interceptor_providers

interceptor_providers?: InterceptorProvider[];

property interceptors

interceptors?: Interceptor[];

property parent

parent?:
    | ServerUnaryCall<any, any>
    | ServerReadableStream<any, any>
    | ServerWritableStream<any, any>
    | ServerDuplexStream<any, any>;

property propagate_flags

propagate_flags?: number;

interface CallProperties

interface CallProperties<RequestType, ResponseType> {}

property argument

argument?: RequestType;

property call

call: SurfaceCall;

property callback

callback?: UnaryCallback<ResponseType>;

property callOptions

callOptions: CallOptions;

property channel

channel: Channel;

property metadata

metadata: Metadata;

property methodDefinition

methodDefinition: ClientMethodDefinition<RequestType, ResponseType>;

interface ChannelInterface

interface Channel {}

An interface that represents a communication channel to a server specified by a given address.

method close

close: () => void;

Close the channel. This has the same functionality as the existing grpc.Client.prototype.close

method createCall

createCall: (
    method: string,
    deadline: Deadline,
    host: string | null | undefined,
    parentCall: ServerSurfaceCall | null,
    propagateFlags: number | null | undefined
) => Call;

Create a call object. Call is an opaque type that is used by the Client class. This function is called by the gRPC library when starting a request. Implementers should return an instance of Call that is returned from calling createCall on an instance of the provided Channel class.
Parameter method
The full method string to request.
Parameter deadline
The call deadline
Parameter host
A host string override for making the request
Parameter parentCall
A server call to propagate some information from
Parameter propagateFlags
A bitwise combination of elements of grpc.propagate that indicates what information to propagate from parentCall.

method getChannelzRef

getChannelzRef: () => ChannelRef;

Get the channelz reference object for this channel. A request to the channelz service for the id in this object will provide information about this channel.

method getConnectivityState

getConnectivityState: (tryToConnect: boolean) => ConnectivityState;

Get the channel's current connectivity state. This method is here mainly because it is in the existing internal Channel class, and there isn't another good place to put it.
Parameter tryToConnect
If true, the channel will start connecting if it is idle. Otherwise, idle channels will only start connecting when a call starts.

method getTarget

getTarget: () => string;

Return the target that this channel connects to

method watchConnectivityState

watchConnectivityState: (
    currentState: ConnectivityState,
    deadline: Date | number,
    callback: (error?: Error) => void
) => void;

Watch for connectivity state changes. This is also here mainly because it is in the existing external Channel class.
Parameter currentState
The state to watch for transitions from. This should always be populated by calling getConnectivityState immediately before.
Parameter deadline
A deadline for waiting for a state change
Parameter callback
Called with no error when a state change, or with an error if the deadline passes without a state change.

interface ChannelOptions

interface ChannelOptions {}

An interface that contains options used when initializing a Channel instance.

property 'grpc-node.max_session_memory'

'grpc-node.max_session_memory'?: number;

property 'grpc-node.tls_enable_trace'

'grpc-node.tls_enable_trace'?: number;

Set the enableTrace option in TLS clients and servers

property 'grpc.client_idle_timeout_ms'

'grpc.client_idle_timeout_ms'?: number;

property 'grpc.default_authority'

'grpc.default_authority'?: string;

property 'grpc.default_compression_algorithm'

'grpc.default_compression_algorithm'?: CompressionAlgorithms;

property 'grpc.dns_min_time_between_resolutions_ms'

'grpc.dns_min_time_between_resolutions_ms'?: number;

property 'grpc.enable_channelz'

'grpc.enable_channelz'?: number;

property 'grpc.enable_http_proxy'

'grpc.enable_http_proxy'?: number;

property 'grpc.enable_retries'

'grpc.enable_retries'?: number;

property 'grpc.http_connect_creds'

'grpc.http_connect_creds'?: string;

property 'grpc.http_connect_target'

'grpc.http_connect_target'?: string;

property 'grpc.initial_reconnect_backoff_ms'

'grpc.initial_reconnect_backoff_ms'?: number;

property 'grpc.keepalive_permit_without_calls'

'grpc.keepalive_permit_without_calls'?: number;

property 'grpc.keepalive_time_ms'

'grpc.keepalive_time_ms'?: number;

property 'grpc.keepalive_timeout_ms'

'grpc.keepalive_timeout_ms'?: number;

property 'grpc.lb.ring_hash.ring_size_cap'

'grpc.lb.ring_hash.ring_size_cap'?: number;

property 'grpc.max_concurrent_streams'

'grpc.max_concurrent_streams'?: number;

property 'grpc.max_connection_age_grace_ms'

'grpc.max_connection_age_grace_ms'?: number;

property 'grpc.max_connection_age_ms'

'grpc.max_connection_age_ms'?: number;

property 'grpc.max_connection_idle_ms'

'grpc.max_connection_idle_ms'?: number;

property 'grpc.max_receive_message_length'

'grpc.max_receive_message_length'?: number;

property 'grpc.max_reconnect_backoff_ms'

'grpc.max_reconnect_backoff_ms'?: number;

property 'grpc.max_send_message_length'

'grpc.max_send_message_length'?: number;

property 'grpc.per_rpc_retry_buffer_size'

'grpc.per_rpc_retry_buffer_size'?: number;

property 'grpc.primary_user_agent'

'grpc.primary_user_agent'?: string;

property 'grpc.retry_buffer_size'

'grpc.retry_buffer_size'?: number;

property 'grpc.secondary_user_agent'

'grpc.secondary_user_agent'?: string;

property 'grpc.service_config_disable_resolution'

'grpc.service_config_disable_resolution'?: number;

property 'grpc.service_config'

'grpc.service_config'?: string;

property 'grpc.ssl_target_name_override'

'grpc.ssl_target_name_override'?: string;

property 'grpc.use_local_subchannel_pool'

'grpc.use_local_subchannel_pool'?: number;

index signature

[key: string]: any;

interface deserialize

interface Deserialize<T> {}

call signature

(bytes: Buffer): T;

interface FullResponder

interface FullResponder {}

property sendMessage

sendMessage: MessageResponder;

property sendMetadata

sendMetadata: MetadataResponder;

property sendStatus

sendStatus: StatusResponder;

property start

start: StartResponder;

interface FullServerListener

interface FullServerListener {}

property onCancel

onCancel: ServerCancelListener;

property onReceiveHalfClose

onReceiveHalfClose: ServerHalfCloseListener;

property onReceiveMessage

onReceiveMessage: ServerMessageListener;

property onReceiveMetadata

onReceiveMetadata: ServerMetadataListener;

interface GrpcObject

interface GrpcObject {}

index signature

[index: string]: GrpcObject | ServiceClientConstructor | ProtobufTypeDefinition;

interface InterceptingListener

interface InterceptingListener {}

An object with methods for handling the responses to a call.

method onReceiveMessage

onReceiveMessage: (message: any) => void;

method onReceiveMetadata

onReceiveMetadata: (metadata: Metadata) => void;

method onReceiveStatus

onReceiveStatus: (status: StatusObject) => void;

interface Interceptor

interface Interceptor {}

call signature

(options: InterceptorOptions, nextCall: NextCall): InterceptingCall;

interface InterceptorOptions

interface InterceptorOptions extends CallOptions {}

property method_definition

method_definition: ClientMethodDefinition<any, any>;

interface InterceptorProvider

interface InterceptorProvider {}

call signature

(methodDefinition: ClientMethodDefinition<any, any>): Interceptor;

interface KeyCertPair

interface KeyCertPair {}

property cert_chain

cert_chain: Buffer;

property private_key

private_key: Buffer;

interface LoadBalancingConfig

interface LoadBalancingConfig {}

index signature

[key: string]: object;

interface MetadataOptions

interface MetadataOptions {}

property cacheableRequest

cacheableRequest?: boolean;

property corked

corked?: boolean;

property idempotentRequest

idempotentRequest?: boolean;

property waitForReady

waitForReady?: boolean;

interface MethodConfig

interface MethodConfig {}

property hedgingPolicy

hedgingPolicy?: HedgingPolicy;

property maxRequestBytes

maxRequestBytes?: number;

property maxResponseBytes

maxResponseBytes?: number;

property name

name: MethodConfigName[];

property retryPolicy

retryPolicy?: RetryPolicy;

property timeout

timeout?: Duration;

property waitForReady

waitForReady?: boolean;

interface MethodDefinition

interface MethodDefinition<RequestType, ResponseType>
    extends ClientMethodDefinition<RequestType, ResponseType>,
        ServerMethodDefinition<RequestType, ResponseType> {}

interface NextCall

interface NextCall {}

call signature

(options: InterceptorOptions): InterceptingCallInterface;

interface ProtobufTypeDefinition

interface ProtobufTypeDefinition {}

property fileDescriptorProtos

fileDescriptorProtos: Buffer[];

property format

format: string;

property type

type: object;

interface requestCallback

interface UnaryCallback<ResponseType> {}

call signature

(err: ServiceError | null, value?: ResponseType): void;

interface RetryPolicy

interface RetryPolicy {}

property backoffMultiplier

backoffMultiplier: number;

property initialBackoff

initialBackoff: string;

property maxAttempts

maxAttempts: number;

property maxBackoff

maxBackoff: string;

property retryableStatusCodes

retryableStatusCodes: (Status | string)[];

interface serialize

interface Serialize<T> {}

call signature

(value: T): Buffer;

interface ServerInterceptingCallInterface

interface ServerInterceptingCallInterface {}

method getDeadline

getDeadline: () => Deadline;

Return the call deadline set by the client. The value is Infinity if there is no deadline.

method getPeer

getPeer: () => string;

Return the peer address of the client making the request, if known, or "unknown" otherwise

method sendMessage

sendMessage: (message: any, callback: () => void) => void;

Send a response message.

method sendMetadata

sendMetadata: (metadata: Metadata) => void;

Send response metadata.

method sendStatus

sendStatus: (status: PartialStatusObject) => void;

End the call by sending this status.

method start

start: (listener: InterceptingServerListener) => void;

method startRead

startRead: () => void;

Start a single read, eventually triggering either listener.onReceiveMessage or listener.onReceiveHalfClose.

interface ServerInterceptor

interface ServerInterceptor {}

call signature

(
    methodDescriptor: ServerMethodDefinition<any, any>,
    call: ServerInterceptingCallInterface
): ServerInterceptingCall;

interface ServerOptions

interface ServerOptions extends ChannelOptions {}

property interceptors

interceptors?: ServerInterceptor[];

interface ServiceClientConstructor

interface ServiceClientConstructor {}

property service

service: ServiceDefinition;

property serviceName

serviceName: string;

construct signature

new (
    address: string,
    credentials: ChannelCredentials,
    options?: Partial<ChannelOptions>
): ServiceClient;

interface ServiceConfig

interface ServiceConfig {}

property loadBalancingConfig

loadBalancingConfig: LoadBalancingConfig[];

property loadBalancingPolicy

loadBalancingPolicy?: string;

property methodConfig

methodConfig: MethodConfig[];

property retryThrottling

retryThrottling?: RetryThrottling;

interface StatusObject

interface StatusObject {}

property code

code: Status;

property details

details: string;

property metadata

metadata: Metadata;

interface UntypedServiceImplementation

interface UntypedServiceImplementation {}

index signature

[name: string]: UntypedHandleCall;

interface VerifyOptions

interface VerifyOptions {}

Additional peer verification options that can be set when creating SSL credentials.

property checkServerIdentity

checkServerIdentity?: CheckServerIdentityCallback;

If set, this callback will be invoked after the usual hostname verification has been performed on the peer certificate.

Enums

enum compressionAlgorithms

enum compressionAlgorithms {
    identity = 0,
    deflate = 1,
    gzip = 2,
}

member deflate

deflate = 1

member gzip

gzip = 2

member identity

identity = 0

enum connectivityState

enum connectivityState {
    IDLE = 0,
    CONNECTING = 1,
    READY = 2,
    TRANSIENT_FAILURE = 3,
    SHUTDOWN = 4,
}

member CONNECTING

CONNECTING = 1

member IDLE

IDLE = 0

member READY

READY = 2

member SHUTDOWN

SHUTDOWN = 4

member TRANSIENT_FAILURE

TRANSIENT_FAILURE = 3

enum logVerbosity

enum logVerbosity {
    DEBUG = 0,
    INFO = 1,
    ERROR = 2,
    NONE = 3,
}

member DEBUG

DEBUG = 0

member ERROR

ERROR = 2

member INFO

INFO = 1

member NONE

NONE = 3

enum propagate

enum propagate {
    DEADLINE = 1,
    CENSUS_STATS_CONTEXT = 2,
    CENSUS_TRACING_CONTEXT = 4,
    CANCELLATION = 8,
    DEFAULTS = 65535,
}

NOTE: This enum is not currently used in any implemented API in this library. It is included only for type parity with the other implementation.

member CANCELLATION

CANCELLATION = 8

member CENSUS_STATS_CONTEXT

CENSUS_STATS_CONTEXT = 2

member CENSUS_TRACING_CONTEXT

CENSUS_TRACING_CONTEXT = 4

member DEADLINE

DEADLINE = 1

member DEFAULTS

DEFAULTS = 65535

enum status

enum status {
    OK = 0,
    CANCELLED = 1,
    UNKNOWN = 2,
    INVALID_ARGUMENT = 3,
    DEADLINE_EXCEEDED = 4,
    NOT_FOUND = 5,
    ALREADY_EXISTS = 6,
    PERMISSION_DENIED = 7,
    RESOURCE_EXHAUSTED = 8,
    FAILED_PRECONDITION = 9,
    ABORTED = 10,
    OUT_OF_RANGE = 11,
    UNIMPLEMENTED = 12,
    INTERNAL = 13,
    UNAVAILABLE = 14,
    DATA_LOSS = 15,
    UNAUTHENTICATED = 16,
}

member ABORTED

ABORTED = 10

member ALREADY_EXISTS

ALREADY_EXISTS = 6

member CANCELLED

CANCELLED = 1

member DATA_LOSS

DATA_LOSS = 15

member DEADLINE_EXCEEDED

DEADLINE_EXCEEDED = 4

member FAILED_PRECONDITION

FAILED_PRECONDITION = 9

member INTERNAL

INTERNAL = 13

member INVALID_ARGUMENT

INVALID_ARGUMENT = 3

member NOT_FOUND

NOT_FOUND = 5

member OK

OK = 0

member OUT_OF_RANGE

OUT_OF_RANGE = 11

member PERMISSION_DENIED

PERMISSION_DENIED = 7

member RESOURCE_EXHAUSTED

RESOURCE_EXHAUSTED = 8

member UNAUTHENTICATED

UNAUTHENTICATED = 16

member UNAVAILABLE

UNAVAILABLE = 14

member UNIMPLEMENTED

UNIMPLEMENTED = 12

member UNKNOWN

UNKNOWN = 2

Type Aliases

type Call

type Call =
    | ClientUnaryCall
    | ClientReadableStream<any>
    | ClientWritableStream<any>
    | ClientDuplexStream<any, any>;

type ClientDuplexStream

type ClientDuplexStream<RequestType, ResponseType> =
    ClientWritableStream<RequestType> & ClientReadableStream<ResponseType>;

A type representing the return value of a bidirectional stream method call.

type ClientOptions

type ClientOptions = Partial<ChannelOptions> & {
    channelOverride?: Channel;
    channelFactoryOverride?: (
        address: string,
        credentials: ChannelCredentials,
        options: ClientOptions
    ) => Channel;
    interceptors?: Interceptor[];
    interceptor_providers?: InterceptorProvider[];
    callInvocationTransformer?: CallInvocationTransformer;
};

type ClientReadableStream

type ClientReadableStream<ResponseType> = {
    deserialize: (chunk: Buffer) => ResponseType;
} & SurfaceCall &
    ObjectReadable<ResponseType>;

A type representing the return value of a server stream method call.

type ClientUnaryCall

type ClientUnaryCall = SurfaceCall;

A type representing the return value of a unary method call.

type ClientWritableStream

type ClientWritableStream<RequestType> = {
    serialize: (value: RequestType) => Buffer;
} & SurfaceCall &
    ObjectWritable<RequestType>;

A type representing the return value of a client stream method call.

type Deadline

type Deadline = Date | number;

type handleBidiStreamingCall

type handleBidiStreamingCall<RequestType, ResponseType> = (
    call: ServerDuplexStream<RequestType, ResponseType>
) => void;

type handleClientStreamingCall

type handleClientStreamingCall<RequestType, ResponseType> = (
    call: ServerReadableStream<RequestType, ResponseType>,
    callback: sendUnaryData<ResponseType>
) => void;

type handleServerStreamingCall

type handleServerStreamingCall<RequestType, ResponseType> = (
    call: ServerWritableStream<RequestType, ResponseType>
) => void;

type handleUnaryCall

type handleUnaryCall<RequestType, ResponseType> = (
    call: ServerUnaryCall<RequestType, ResponseType>,
    callback: sendUnaryData<ResponseType>
) => void;

type Listener

type Listener = Partial<FullListener>;

type MetadataValue

type MetadataValue = string | Buffer;

type OAuth2Client

type OAuth2Client = OldOAuth2Client | CurrentOAuth2Client;

type Requester

type Requester = Partial<FullRequester>;

type Responder

type Responder = Partial<FullResponder>;

type sendUnaryData

type sendUnaryData<ResponseType> = (
    error: ServerErrorResponse | ServerStatusResponse | null,
    value?: ResponseType | null,
    trailer?: Metadata,
    flags?: number
) => void;

type ServerDuplexStream

type ServerDuplexStream<RequestType, ResponseType> = ServerSurfaceCall &
    ObjectReadable<RequestType> &
    ObjectWritable<ResponseType> & {
        end: (metadata?: Metadata) => void;
    };

type ServerErrorResponse

type ServerErrorResponse = ServerStatusResponse & Error;

type ServerListener

type ServerListener = Partial<FullServerListener>;

type ServerReadableStream

type ServerReadableStream<RequestType, ResponseType> = ServerSurfaceCall &
    ObjectReadable<RequestType>;

type ServerUnaryCall

type ServerUnaryCall<RequestType, ResponseType> = ServerSurfaceCall & {
    request: RequestType;
};

type ServerWritableStream

type ServerWritableStream<RequestType, ResponseType> = ServerSurfaceCall &
    ObjectWritable<ResponseType> & {
        request: RequestType;
        end: (metadata?: Metadata) => void;
    };

type ServiceDefinition

type ServiceDefinition<ImplementationType = UntypedServiceImplementation> = {
    readonly [index in keyof ImplementationType]: MethodDefinition<any, any>;
};

type ServiceError

type ServiceError = StatusObject & Error;

A type extending the built-in Error object with additional fields.

type UntypedHandleCall

type UntypedHandleCall = HandleCall<any, any>;

Namespaces

namespace experimental

module 'build/src/experimental.d.ts' {}

function createChildChannelControlHelper

createChildChannelControlHelper: (
    parent: ChannelControlHelper,
    overrides: Partial<ChannelControlHelper>
) => ChannelControlHelper;

Create a child ChannelControlHelper that overrides some methods of the parent while letting others pass through to the parent unmodified. This allows other code to create these children without needing to know about all of the methods to be passed through.
Parameter parent
Parameter overrides

function createResolver

createResolver: (
    target: GrpcUri,
    listener: ResolverListener,
    options: ChannelOptions
) => Resolver;

Create a name resolver for the specified target, if possible. Throws an error if no such name resolver can be created.
Parameter target
Parameter listener

function durationToMs

durationToMs: (duration: Duration) => number;

function endpointHasAddress

endpointHasAddress: (
    endpoint: Endpoint,
    expectedAddress: SubchannelAddress
) => boolean;

function endpointToString

endpointToString: (endpoint: Endpoint) => string;

function isLoadBalancerNameRegistered

isLoadBalancerNameRegistered: (typeName: string) => boolean;

function log

log: (severity: LogVerbosity, ...args: any[]) => void;

function parseLoadBalancingConfig

parseLoadBalancingConfig: (
    rawConfig: LoadBalancingConfig
) => TypedLoadBalancingConfig;

function registerAdminService

registerAdminService: (
    getServiceDefinition: GetServiceDefinition,
    getHandlers: GetHandlers
) => void;

function registerLoadBalancerType

registerLoadBalancerType: (
    typeName: string,
    loadBalancerType: LoadBalancerConstructor,
    loadBalancingConfigType: TypedLoadBalancingConfigConstructor
) => void;

function registerResolver

registerResolver: (scheme: string, resolverClass: ResolverConstructor) => void;

Register a resolver class to handle target names prefixed with the prefix string. This prefix should correspond to a URI scheme name listed in the [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
Parameter prefix
Parameter resolverClass

function selectLbConfigFromList

selectLbConfigFromList: (
    configs: LoadBalancingConfig[],
    fallbackTodefault?: boolean
) => TypedLoadBalancingConfig | null;

function subchannelAddressToString

subchannelAddressToString: (address: SubchannelAddress) => string;

function trace

trace: (severity: LogVerbosity, tracer: string, text: string) => void;

function uriToString

uriToString: (uri: GrpcUri) => string;

class BackoffTimeout

class BackoffTimeout {}

constructor

constructor(callback: () => void, options?: BackoffOptions);

method getEndTime

getEndTime: () => Date;

Get the approximate timestamp of when the timer will fire. Only valid if this.isRunning() is true.

method isRunning

isRunning: () => boolean;

Check whether the timer is currently running.

method ref

ref: () => void;

Set that while the timer is running, it should keep the Node process running.

method reset

reset: () => void;

Reset the delay time to its initial value. If the timer is still running, retroactively apply that reset to the current timer.

method runOnce

runOnce: () => void;

Call the callback after the current amount of delay time

method stop

stop: () => void;

Stop the timer. The callback will not be called until runOnce is called again.

method unref

unref: () => void;

Set that while the timer is running, it should not keep the Node process running.

class BaseFilter

abstract class BaseFilter implements Filter {}

method receiveMessage

receiveMessage: (message: Promise<Buffer>) => Promise<Buffer>;

method receiveMetadata

receiveMetadata: (metadata: Metadata) => Metadata;

method receiveTrailers

receiveTrailers: (status: StatusObject) => StatusObject;

method sendMessage

sendMessage: (message: Promise<WriteObject>) => Promise<WriteObject>;

method sendMetadata

sendMetadata: (metadata: Promise<Metadata>) => Promise<Metadata>;

class BaseSubchannelWrapper

abstract class BaseSubchannelWrapper implements SubchannelInterface {}

constructor

constructor(child: SubchannelInterface);

property child

protected child: SubchannelInterface;

method addConnectivityStateListener

addConnectivityStateListener: (listener: ConnectivityStateListener) => void;

method addHealthStateWatcher

addHealthStateWatcher: (listener: HealthListener) => void;

method getAddress

getAddress: () => string;

method getChannelzRef

getChannelzRef: () => SubchannelRef;

method getConnectivityState

getConnectivityState: () => ConnectivityState;

method getRealSubchannel

getRealSubchannel: () => Subchannel;

method isHealthy

isHealthy: () => boolean;

method realSubchannelEquals

realSubchannelEquals: (other: SubchannelInterface) => boolean;

method ref

ref: () => void;

method removeConnectivityStateListener

removeConnectivityStateListener: (listener: ConnectivityStateListener) => void;

method removeHealthStateWatcher

removeHealthStateWatcher: (listener: HealthListener) => void;

method setHealthy

protected setHealthy: (healthy: boolean) => void;

method startConnecting

startConnecting: () => void;

method throttleKeepalive

throttleKeepalive: (newKeepaliveTime: number) => void;

method unref

unref: () => void;

class ChildLoadBalancerHandler

class ChildLoadBalancerHandler implements LoadBalancer {}

constructor

constructor(channelControlHelper: ChannelControlHelper, options: ChannelOptions);

method configUpdateRequiresNewPolicyInstance

protected configUpdateRequiresNewPolicyInstance: (
    oldConfig: TypedLoadBalancingConfig,
    newConfig: TypedLoadBalancingConfig
) => boolean;

method destroy

destroy: () => void;

method exitIdle

exitIdle: () => void;

method getTypeName

getTypeName: () => string;

method resetBackoff

resetBackoff: () => void;

method updateAddressList

updateAddressList: (
    endpointList: Endpoint[],
    lbConfig: TypedLoadBalancingConfig,
    attributes: { [key: string]: unknown }
) => void;

Prerequisites: lbConfig !== null and lbConfig.name is registered
Parameter endpointList
Parameter lbConfig
Parameter attributes

class EndpointMap

class EndpointMap<ValueType> {}

property size

readonly size: number;

method clear

clear: () => void;

method delete

delete: (endpoint: Endpoint) => void;

method deleteMissing

deleteMissing: (endpoints: Endpoint[]) => ValueType[];

Delete any entries in this map with keys that are not in endpoints
Parameter endpoints

method entries

entries: () => IterableIterator<[Endpoint, ValueType]>;

method get

get: (endpoint: Endpoint) => ValueType | undefined;

method getForSubchannelAddress

getForSubchannelAddress: (address: SubchannelAddress) => ValueType | undefined;

method has

has: (endpoint: Endpoint) => boolean;

method keys

keys: () => IterableIterator<Endpoint>;

method set

set: (endpoint: Endpoint, mapEntry: ValueType) => void;

method values

values: () => IterableIterator<ValueType>;

class FilterStackFactory

class FilterStackFactory implements FilterFactory<FilterStack> {}

constructor

constructor(factories: FilterFactory<Filter>[]);

method clone

clone: () => FilterStackFactory;

method createFilter

createFilter: () => FilterStack;

method push

push: (filterFactories: FilterFactory<Filter>[]) => void;

class LeafLoadBalancer

class LeafLoadBalancer {}

This class handles the leaf load balancing operations for a single endpoint. It is a thin wrapper around a PickFirstLoadBalancer with a different API that more closely reflects how it will be used as a leaf balancer.

constructor

constructor(
    endpoint: Endpoint,
    channelControlHelper: ChannelControlHelper,
    options: ChannelOptions
);

method destroy

destroy: () => void;

method exitIdle

exitIdle: () => void;

method getConnectivityState

getConnectivityState: () => ConnectivityState;

method getEndpoint

getEndpoint: () => Endpoint;

method getPicker

getPicker: () => Picker;

method startConnecting

startConnecting: () => void;

method updateEndpoint

updateEndpoint: (newEndpoint: Endpoint) => void;

Update the endpoint associated with this LeafLoadBalancer to a new endpoint. Does not trigger connection establishment if a connection attempt is not already in progress.
Parameter newEndpoint

class QueuePicker

class QueuePicker {}

A standard picker representing a load balancer in the IDLE or CONNECTING state. Always responds to every pick request with a QUEUE pick result indicating that the pick should be tried again with the next Picker. Also reports back to the load balancer that a connection should be established once any pick is attempted. If the childPicker is provided, delegate to it instead of returning the hardcoded QUEUE pick result, but still calls exitIdle.

constructor

constructor(loadBalancer: LoadBalancer, childPicker?: Picker);

method pick

pick: (pickArgs: PickArgs) => PickResult;

class UnavailablePicker

class UnavailablePicker implements Picker {}

A standard picker representing a load balancer in the TRANSIENT_FAILURE state. Always responds to every pick request with an UNAVAILABLE status.

constructor

constructor(status?: Partial<StatusObject>);

method pick

pick: (pickArgs: PickArgs) => TransientFailurePickResult;

interface CallStream

interface Call {}

method cancelWithStatus

cancelWithStatus: (status: Status, details: string) => void;

method getCallNumber

getCallNumber: () => number;

method getPeer

getPeer: () => string;

method halfClose

halfClose: () => void;

method sendMessageWithContext

sendMessageWithContext: (context: MessageContext, message: Buffer) => void;

method setCredentials

setCredentials: (credentials: CallCredentials) => void;

method start

start: (metadata: Metadata, listener: InterceptingListener) => void;

method startRead

startRead: () => void;

interface ChannelControlHelper

interface ChannelControlHelper {}

A collection of functions associated with a channel that a load balancer can call as necessary.

method addChannelzChild

addChannelzChild: (child: ChannelRef | SubchannelRef) => void;

method createSubchannel

createSubchannel: (
    subchannelAddress: SubchannelAddress,
    subchannelArgs: ChannelOptions
) => SubchannelInterface;

Returns a subchannel connected to the specified address.
Parameter subchannelAddress
The address to connect to
Parameter subchannelArgs
Extra channel arguments specified by the load balancer

method removeChannelzChild

removeChannelzChild: (child: ChannelRef | SubchannelRef) => void;

method requestReresolution

requestReresolution: () => void;

Request new data from the resolver.

method updateState

updateState: (connectivityState: ConnectivityState, picker: Picker) => void;

Passes a new subchannel picker up to the channel. This is called if either the connectivity state changes or if a different picker is needed for any other reason.
Parameter connectivityState
New connectivity state
Parameter picker
New picker

interface ConfigSelector

interface ConfigSelector {}

Selects a configuration for a method given the name and metadata. Defined in https://github.com/grpc/proposal/blob/master/A31-xds-timeout-support-and-config-selector.md#new-functionality-in-grpc

call signature

(methodName: string, metadata: Metadata, channelId: number): CallConfig;

interface Duration

interface Duration {}

property nanos

nanos: number;

property seconds

seconds: number;

interface Endpoint

interface Endpoint {}

property addresses

addresses: SubchannelAddress[];

interface FailurePercentageEjectionConfig

interface FailurePercentageEjectionConfig {}

property enforcement_percentage

readonly enforcement_percentage: number;

property minimum_hosts

readonly minimum_hosts: number;

property request_volume

readonly request_volume: number;

property threshold

readonly threshold: number;

interface Filter

interface Filter {}

Filter classes represent related per-call logic and state that is primarily used to modify incoming and outgoing data. All async filters can be rejected. The rejection error must be a StatusObject, and a rejection will cause the call to end with that status.

method receiveMessage

receiveMessage: (message: Promise<Buffer>) => Promise<Buffer>;

method receiveMetadata

receiveMetadata: (metadata: Metadata) => Metadata;

method receiveTrailers

receiveTrailers: (status: StatusObject) => StatusObject;

method sendMessage

sendMessage: (message: Promise<WriteObject>) => Promise<WriteObject>;

method sendMetadata

sendMetadata: (metadata: Promise<Metadata>) => Promise<Metadata>;

interface FilterFactory

interface FilterFactory<T extends Filter> {}

method createFilter

createFilter: () => T;

interface GrpcUri

interface GrpcUri {}

property authority

authority?: string;

property path

path: string;

property scheme

scheme?: string;

interface LoadBalancer

interface LoadBalancer {}

Tracks one or more connected subchannels and determines which subchannel each request should use.

method destroy

destroy: () => void;

The load balancer unrefs all of its subchannels and stops calling methods of its channel control helper.

method exitIdle

exitIdle: () => void;

If the load balancer is currently in the IDLE state, start connecting.

method getTypeName

getTypeName: () => string;

Get the type name for this load balancer type. Must be constant across an entire load balancer implementation class and must match the name that the balancer implementation class was registered with.

method resetBackoff

resetBackoff: () => void;

If the load balancer is currently in the CONNECTING or TRANSIENT_FAILURE state, reset the current connection backoff timeout to its base value and transition to CONNECTING if in TRANSIENT_FAILURE.

method updateAddressList

updateAddressList: (
    endpointList: Endpoint[],
    lbConfig: TypedLoadBalancingConfig,
    attributes: { [key: string]: unknown }
) => void;

Gives the load balancer a new list of addresses to start connecting to. The load balancer will start establishing connections with the new list, but will continue using any existing connections until the new connections are established
Parameter endpointList
The new list of addresses to connect to
Parameter lbConfig
The load balancing config object from the service config, if one was provided

interface OutlierDetectionRawConfig

interface OutlierDetectionRawConfig {}

property base_ejection_time

base_ejection_time?: Duration;

property child_policy

child_policy: LoadBalancingConfig[];

property failure_percentage_ejection

failure_percentage_ejection?: Partial<FailurePercentageEjectionConfig>;

property interval

interval?: Duration;

property max_ejection_percent

max_ejection_percent?: number;

property max_ejection_time

max_ejection_time?: Duration;

property success_rate_ejection

success_rate_ejection?: Partial<SuccessRateEjectionConfig>;

interface PickArgs

interface PickArgs {}

property extraPickInfo

extraPickInfo: {
    [key: string]: string;
};

property metadata

metadata: Metadata;

interface Picker

interface Picker {}

A proxy object representing the momentary state of a load balancer. Picks subchannels or returns other information based on that state. Should be replaced every time the load balancer changes state.

method pick

pick: (pickArgs: PickArgs) => PickResult;

interface PickResult

interface PickResult {}

property onCallEnded

onCallEnded: ((statusCode: Status) => void) | null;

property onCallStarted

onCallStarted: (() => void) | null;

property pickResultType

pickResultType: PickResultType;

property status

status: StatusObject | null;

The status object to end the call with. Populated if and only if pickResultType is TRANSIENT_FAILURE.

property subchannel

subchannel: SubchannelInterface | null;

The subchannel to use as the transport for the call. Only meaningful if pickResultType is COMPLETE. If null, indicates that the call should be dropped.

interface Resolver

interface Resolver {}

A resolver class that handles one or more of the name syntax schemes defined in the [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)

method destroy

destroy: () => void;

Discard all resources owned by the resolver. A later call to updateResolution should reinitialize those resources. No ResolverListener callbacks should be called after destroy is called until updateResolution is called again.

method updateResolution

updateResolution: () => void;

Indicates that the caller wants new name resolution data. Calling this function may eventually result in calling one of the ResolverListener functions, but that is not guaranteed. Those functions will never be called synchronously with the constructor or updateResolution.

interface ResolverListener

interface ResolverListener {}

A listener object passed to the resolver's constructor that provides name resolution updates back to the resolver's owner.

method onError

onError: (error: StatusObject) => void;

Called whenever a name resolution attempt fails.
Parameter error
Describes how resolution failed

method onSuccessfulResolution

onSuccessfulResolution: (
    addressList: Endpoint[],
    serviceConfig: ServiceConfig | null,
    serviceConfigError: StatusObject | null,
    configSelector: ConfigSelector | null,
    attributes: { [key: string]: unknown }
) => void;

Called whenever the resolver has new name resolution results to report
Parameter addressList
The new list of backend addresses
Parameter serviceConfig
The new service configuration corresponding to the addressList. Will be null if no service configuration was retrieved or if the service configuration was invalid
Parameter serviceConfigError
If non-null, indicates that the retrieved service configuration was invalid

interface SubchannelInterface

interface SubchannelInterface {}

This is an interface for load balancing policies to use to interact with subchannels. This allows load balancing policies to wrap and unwrap subchannels.
Any load balancing policy that wraps subchannels must unwrap the subchannel in the picker, so that other load balancing policies consistently have access to their own wrapper objects.

method addConnectivityStateListener

addConnectivityStateListener: (listener: ConnectivityStateListener) => void;

method addHealthStateWatcher

addHealthStateWatcher: (listener: HealthListener) => void;

method getAddress

getAddress: () => string;

method getChannelzRef

getChannelzRef: () => SubchannelRef;

method getConnectivityState

getConnectivityState: () => ConnectivityState;

method getRealSubchannel

getRealSubchannel: () => Subchannel;

If this is a wrapper, return the wrapped subchannel, otherwise return this

method isHealthy

isHealthy: () => boolean;

method realSubchannelEquals

realSubchannelEquals: (other: SubchannelInterface) => boolean;

Returns true if this and other both proxy the same underlying subchannel. Can be used instead of directly accessing getRealSubchannel to allow mocks to avoid implementing getRealSubchannel

method ref

ref: () => void;

method removeConnectivityStateListener

removeConnectivityStateListener: (listener: ConnectivityStateListener) => void;

method removeHealthStateWatcher

removeHealthStateWatcher: (listener: HealthListener) => void;

method startConnecting

startConnecting: () => void;

method throttleKeepalive

throttleKeepalive: (newKeepaliveTime: number) => void;

method unref

unref: () => void;

interface SuccessRateEjectionConfig

interface SuccessRateEjectionConfig {}

property enforcement_percentage

readonly enforcement_percentage: number;

property minimum_hosts

readonly minimum_hosts: number;

property request_volume

readonly request_volume: number;

property stdev_factor

readonly stdev_factor: number;

interface TypedLoadBalancingConfig

interface TypedLoadBalancingConfig {}

method getLoadBalancerName

getLoadBalancerName: () => string;

method toJsonObject

toJsonObject: () => object;

enum PickResultType

enum PickResultType {
    COMPLETE = 0,
    QUEUE = 1,
    TRANSIENT_FAILURE = 2,
    DROP = 3,
}

member COMPLETE

COMPLETE = 0

member DROP

DROP = 3

member QUEUE

QUEUE = 1

member TRANSIENT_FAILURE

TRANSIENT_FAILURE = 2

type ConnectivityStateListener

type ConnectivityStateListener = (
    subchannel: SubchannelInterface,
    previousState: ConnectivityState,
    newState: ConnectivityState,
    keepaliveTime: number,
    errorMessage?: string
) => void;

type HealthListener

type HealthListener = (healthy: boolean) => void;

type SubchannelAddress

type SubchannelAddress = TcpSubchannelAddress | IpcSubchannelAddress;

This represents a single backend address to connect to. This interface is a subset of net.SocketConnectOpts, i.e. the options described at https://nodejs.org/api/net.html#net_socket_connect_options_connectlistener. Those are in turn a subset of the options that can be passed to http2.connect.

Package Files (38)

Dependencies (2)

Peer Dependencies (0)

No peer dependencies.

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@grpc/grpc-js

Install

Overview

Index

Variables

Functions

Classes

Interfaces

Enums

Type Aliases

Namespaces

Variables

variable credentials

Functions

function addAdminServicesToServer

function closeClient

Parameter client

function getChannelzHandlers

function getChannelzServiceDefinition

function getClientChannel

function load

function loadObject

function loadPackageDefinition

Parameter packageDef

function makeClientConstructor

Parameter methods

Parameter serviceName

Parameter classOptions

function makeGenericClientConstructor

Parameter methods

Parameter serviceName

Parameter classOptions

function setLogger

function setLogVerbosity

function waitForClientReady

Classes

class CallCredentials

method compose

Parameter callCredentials

method createEmpty

method createFromGoogleCredential

Parameter googleCredentials

method createFromMetadataGenerator

Parameter metadataGenerator

method generateMetadata

Parameter options

class Channel

constructor

method close

method createCall

method getChannelzRef

Returns

method getConnectivityState

method getTarget

method watchConnectivityState

class ChannelCredentials

constructor

property callCredentials

method compose

Parameter callCredentials

method createFromSecureContext

Parameter secureContext

Parameter verifyOptions

method createInsecure

method createSsl

Parameter rootCerts

Parameter privateKey

Parameter certChain

Parameter verifyOptions

class Client

constructor

method close

method getChannel

method makeBidiStreamRequest

method makeClientStreamRequest

method makeServerStreamRequest

method makeUnaryRequest

method waitForReady

class InterceptingCall

constructor