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feat: deferred client initialization #23

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merged 1 commit into from
Mar 6, 2020
Merged

feat: deferred client initialization #23

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79 changes: 57 additions & 22 deletions src/v1beta1/big_query_storage_client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -43,8 +43,13 @@ export class BigQueryStorageClient {
private _innerApiCalls: {[name: string]: Function};
private _pathTemplates: {[name: string]: gax.PathTemplate};
private _terminated = false;
private _opts: ClientOptions;
private _gaxModule: typeof gax | typeof gax.fallback;
private _gaxGrpc: gax.GrpcClient | gax.fallback.GrpcClient;
private _protos: {};
private _defaults: {[method: string]: gax.CallSettings};
auth: gax.GoogleAuth;
bigQueryStorageStub: Promise<{[name: string]: Function}>;
bigQueryStorageStub?: Promise<{[name: string]: Function}>;

/**
* Construct an instance of BigQueryStorageClient.
Expand All @@ -68,8 +73,6 @@ export class BigQueryStorageClient {
* app is running in an environment which supports
* {@link https://developers.google.com/identity/protocols/application-default-credentials Application Default Credentials},
* your project ID will be detected automatically.
* @param {function} [options.promise] - Custom promise module to use instead
* of native Promises.
* @param {string} [options.apiEndpoint] - The domain name of the
* API remote host.
*/
Expand Down Expand Up @@ -99,25 +102,28 @@ export class BigQueryStorageClient {
// If we are in browser, we are already using fallback because of the
// "browser" field in package.json.
// But if we were explicitly requested to use fallback, let's do it now.
const gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;

// Create a `gaxGrpc` object, with any grpc-specific options
// sent to the client.
opts.scopes = (this.constructor as typeof BigQueryStorageClient).scopes;
const gaxGrpc = new gaxModule.GrpcClient(opts);
this._gaxGrpc = new this._gaxModule.GrpcClient(opts);

// Save options to use in initialize() method.
this._opts = opts;

// Save the auth object to the client, for use by other methods.
this.auth = gaxGrpc.auth as gax.GoogleAuth;
this.auth = this._gaxGrpc.auth as gax.GoogleAuth;

// Determine the client header string.
const clientHeader = [`gax/${gaxModule.version}`, `gapic/${version}`];
const clientHeader = [`gax/${this._gaxModule.version}`, `gapic/${version}`];
if (typeof process !== 'undefined' && 'versions' in process) {
clientHeader.push(`gl-node/${process.versions.node}`);
} else {
clientHeader.push(`gl-web/${gaxModule.version}`);
clientHeader.push(`gl-web/${this._gaxModule.version}`);
}
if (!opts.fallback) {
clientHeader.push(`grpc/${gaxGrpc.grpcVersion}`);
clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
}
if (opts.libName && opts.libVersion) {
clientHeader.push(`${opts.libName}/${opts.libVersion}`);
Expand All @@ -133,30 +139,32 @@ export class BigQueryStorageClient {
'protos',
'protos.json'
);
const protos = gaxGrpc.loadProto(
this._protos = this._gaxGrpc.loadProto(
opts.fallback ? require('../../protos/protos.json') : nodejsProtoPath
);

// This API contains "path templates"; forward-slash-separated
// identifiers to uniquely identify resources within the API.
// Create useful helper objects for these.
this._pathTemplates = {
readSessionPathTemplate: new gaxModule.PathTemplate(
readSessionPathTemplate: new this._gaxModule.PathTemplate(
'projects/{project}/locations/{location}/sessions/{session}'
),
streamPathTemplate: new gaxModule.PathTemplate(
streamPathTemplate: new this._gaxModule.PathTemplate(
'projects/{project}/locations/{location}/streams/{stream}'
),
};

// Some of the methods on this service provide streaming responses.
// Provide descriptors for these.
this._descriptors.stream = {
readRows: new gaxModule.StreamDescriptor(gax.StreamType.SERVER_STREAMING),
readRows: new this._gaxModule.StreamDescriptor(
gax.StreamType.SERVER_STREAMING
),
};

// Put together the default options sent with requests.
const defaults = gaxGrpc.constructSettings(
this._defaults = this._gaxGrpc.constructSettings(
'google.cloud.bigquery.storage.v1beta1.BigQueryStorage',
gapicConfig as gax.ClientConfig,
opts.clientConfig || {},
Expand All @@ -167,17 +175,36 @@ export class BigQueryStorageClient {
// of calling the API is handled in `google-gax`, with this code
// merely providing the destination and request information.
this._innerApiCalls = {};
}

/**
* Initialize the client.
* Performs asynchronous operations (such as authentication) and prepares the client.
* This function will be called automatically when any class method is called for the
* first time, but if you need to initialize it before calling an actual method,
* feel free to call initialize() directly.
*
* You can await on this method if you want to make sure the client is initialized.
*
* @returns {Promise} A promise that resolves to an authenticated service stub.
*/
initialize() {
// If the client stub promise is already initialized, return immediately.
if (this.bigQueryStorageStub) {
return this.bigQueryStorageStub;
}

// Put together the "service stub" for
// google.cloud.bigquery.storage.v1beta1.BigQueryStorage.
this.bigQueryStorageStub = gaxGrpc.createStub(
opts.fallback
? (protos as protobuf.Root).lookupService(
this.bigQueryStorageStub = this._gaxGrpc.createStub(
this._opts.fallback
? (this._protos as protobuf.Root).lookupService(
'google.cloud.bigquery.storage.v1beta1.BigQueryStorage'
)
: // tslint:disable-next-line no-any
(protos as any).google.cloud.bigquery.storage.v1beta1.BigQueryStorage,
opts
(this._protos as any).google.cloud.bigquery.storage.v1beta1
.BigQueryStorage,
this._opts
) as Promise<{[method: string]: Function}>;

// Iterate over each of the methods that the service provides
Expand All @@ -203,9 +230,9 @@ export class BigQueryStorageClient {
}
);

const apiCall = gaxModule.createApiCall(
const apiCall = this._gaxModule.createApiCall(
innerCallPromise,
defaults[methodName],
this._defaults[methodName],
this._descriptors.page[methodName] ||
this._descriptors.stream[methodName] ||
this._descriptors.longrunning[methodName]
Expand All @@ -219,6 +246,8 @@ export class BigQueryStorageClient {
return apiCall(argument, callOptions, callback);
};
}

return this.bigQueryStorageStub;
}

/**
Expand Down Expand Up @@ -386,6 +415,7 @@ export class BigQueryStorageClient {
'table_reference.project_id': request.tableReference!.projectId || '',
'table_reference.dataset_id': request.tableReference!.datasetId || '',
});
this.initialize();
return this._innerApiCalls.createReadSession(request, options, callback);
}
batchCreateReadSessionStreams(
Expand Down Expand Up @@ -473,6 +503,7 @@ export class BigQueryStorageClient {
] = gax.routingHeader.fromParams({
'session.name': request.session!.name || '',
});
this.initialize();
return this._innerApiCalls.batchCreateReadSessionStreams(
request,
options,
Expand Down Expand Up @@ -570,6 +601,7 @@ export class BigQueryStorageClient {
] = gax.routingHeader.fromParams({
'stream.name': request.stream!.name || '',
});
this.initialize();
return this._innerApiCalls.finalizeStream(request, options, callback);
}
splitReadStream(
Expand Down Expand Up @@ -670,6 +702,7 @@ export class BigQueryStorageClient {
] = gax.routingHeader.fromParams({
'original_stream.name': request.originalStream!.name || '',
});
this.initialize();
return this._innerApiCalls.splitReadStream(request, options, callback);
}

Expand Down Expand Up @@ -708,6 +741,7 @@ export class BigQueryStorageClient {
] = gax.routingHeader.fromParams({
'read_position.stream.name': request.readPosition!.stream!.name || '',
});
this.initialize();
return this._innerApiCalls.readRows(request, options);
}

Expand Down Expand Up @@ -822,8 +856,9 @@ export class BigQueryStorageClient {
* The client will no longer be usable and all future behavior is undefined.
*/
close(): Promise<void> {
this.initialize();
if (!this._terminated) {
return this.bigQueryStorageStub.then(stub => {
return this.bigQueryStorageStub!.then(stub => {
this._terminated = true;
stub.close();
});
Expand Down
8 changes: 4 additions & 4 deletions synth.metadata
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,13 +1,13 @@
{
"updateTime": "2020-03-05T12:45:42.538924Z",
"updateTime": "2020-03-05T23:02:10.150448Z",
"sources": [
{
"git": {
"name": "googleapis",
"remote": "https://github.com/googleapis/googleapis.git",
"sha": "638253bf86d1ce1c314108a089b7351440c2f0bf",
"internalRef": "298971070",
"log": "638253bf86d1ce1c314108a089b7351440c2f0bf\nfix: add java_multiple_files option for automl text_sentiment.proto\n\nPiperOrigin-RevId: 298971070\n\n373d655703bf914fb8b0b1cc4071d772bac0e0d1\nUpdate Recs AI Beta public bazel file\n\nPiperOrigin-RevId: 298961623\n\ndcc5d00fc8a8d8b56f16194d7c682027b2c66a3b\nfix: add java_multiple_files option for automl classification.proto\n\nPiperOrigin-RevId: 298953301\n\na3f791827266f3496a6a5201d58adc4bb265c2a3\nchore: automl/v1 publish annotations and retry config\n\nPiperOrigin-RevId: 298942178\n\n01c681586d8d6dbd60155289b587aee678530bd9\nMark return_immediately in PullRequest deprecated.\n\nPiperOrigin-RevId: 298893281\n\nc9f5e9c4bfed54bbd09227e990e7bded5f90f31c\nRemove out of date documentation for predicate support on the Storage API\n\nPiperOrigin-RevId: 298883309\n\nfd5b3b8238d783b04692a113ffe07c0363f5de0f\ngenerate webrisk v1 proto\n\nPiperOrigin-RevId: 298847934\n\n541b1ded4abadcc38e8178680b0677f65594ea6f\nUpdate cloud asset api v1p4beta1.\n\nPiperOrigin-RevId: 298686266\n\nc0d171acecb4f5b0bfd2c4ca34fc54716574e300\n Updated to include the Notification v1 API.\n\nPiperOrigin-RevId: 298652775\n\n2346a9186c0bff2c9cc439f2459d558068637e05\nAdd Service Directory v1beta1 protos and configs\n\nPiperOrigin-RevId: 298625638\n\n"
"sha": "f0b581b5bdf803e45201ecdb3688b60e381628a8",
"internalRef": "299181282",
"log": "f0b581b5bdf803e45201ecdb3688b60e381628a8\nfix: recommendationengine/v1beta1 update some comments\n\nPiperOrigin-RevId: 299181282\n\n10e9a0a833dc85ff8f05b2c67ebe5ac785fe04ff\nbuild: add generated BUILD file for Routes Preferred API\n\nPiperOrigin-RevId: 299164808\n\n86738c956a8238d7c77f729be78b0ed887a6c913\npublish v1p1beta1: update with absolute address in comments\n\nPiperOrigin-RevId: 299152383\n\n73d9f2ad4591de45c2e1f352bc99d70cbd2a6d95\npublish v1: update with absolute address in comments\n\nPiperOrigin-RevId: 299147194\n\nd2158f24cb77b0b0ccfe68af784c6a628705e3c6\npublish v1beta2: update with absolute address in comments\n\nPiperOrigin-RevId: 299147086\n\n7fca61292c11b4cd5b352cee1a50bf88819dd63b\npublish v1p2beta1: update with absolute address in comments\n\nPiperOrigin-RevId: 299146903\n\n583b7321624736e2c490e328f4b1957335779295\npublish v1p3beta1: update with absolute address in comments\n\nPiperOrigin-RevId: 299146674\n\n"
}
},
{
Expand Down
36 changes: 36 additions & 0 deletions test/gapic-big_query_storage-v1beta1.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -105,12 +105,30 @@ describe('v1beta1.BigQueryStorageClient', () => {
});
assert(client);
});
it('has initialize method and supports deferred initialization', async () => {
const client = new bigquerystorageModule.v1beta1.BigQueryStorageClient({
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
assert.strictEqual(client.bigQueryStorageStub, undefined);
await client.initialize();
assert(client.bigQueryStorageStub);
});
it('has close method', () => {
const client = new bigquerystorageModule.v1beta1.BigQueryStorageClient({
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
client.close();
});
describe('createReadSession', () => {
it('invokes createReadSession without error', done => {
const client = new bigquerystorageModule.v1beta1.BigQueryStorageClient({
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.ICreateReadSessionRequest = {};
request.tableReference = {};
Expand All @@ -137,6 +155,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.ICreateReadSessionRequest = {};
request.tableReference = {};
Expand Down Expand Up @@ -165,6 +185,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IBatchCreateReadSessionStreamsRequest = {};
request.session = {};
Expand All @@ -189,6 +211,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IBatchCreateReadSessionStreamsRequest = {};
request.session = {};
Expand Down Expand Up @@ -218,6 +242,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IFinalizeStreamRequest = {};
request.stream = {};
Expand All @@ -242,6 +268,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IFinalizeStreamRequest = {};
request.stream = {};
Expand All @@ -268,6 +296,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.ISplitReadStreamRequest = {};
request.originalStream = {};
Expand All @@ -292,6 +322,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.ISplitReadStreamRequest = {};
request.originalStream = {};
Expand All @@ -318,6 +350,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IReadRowsRequest = {};
request.readPosition = {};
Expand Down Expand Up @@ -346,6 +380,8 @@ describe('v1beta1.BigQueryStorageClient', () => {
credentials: {client_email: 'bogus', private_key: 'bogus'},
projectId: 'bogus',
});
// Initialize client before mocking
client.initialize();
// Mock request
const request: protosTypes.google.cloud.bigquery.storage.v1beta1.IReadRowsRequest = {};
request.readPosition = {};
Expand Down