WorkflowsClient

WorkflowsClient

Workflows is used to deploy and execute workflow programs. Workflows makes sure the program executes reliably, despite hardware and networking interruptions.

Constructor

new WorkflowsClient(optionsopt, gaxInstanceopt)

Construct an instance of WorkflowsClient.

Parameters:
Name Type Attributes Description
options object <optional>

The configuration object. The options accepted by the constructor are described in detail in this document. The common options are:

Properties
Name Type Attributes Description
credentials object <optional>

Credentials object.

Properties
Name Type Attributes Description
client_email string <optional>
private_key string <optional>
email string <optional>

Account email address. Required when using a .pem or .p12 keyFilename.
keyFilename string <optional>

Full path to the a .json, .pem, or .p12 key downloaded from the Google Developers Console. If you provide a path to a JSON file, the projectId option below is not necessary. NOTE: .pem and .p12 require you to specify options.email as well.
port number <optional>

The port on which to connect to the remote host.
projectId string <optional>

The project ID from the Google Developer's Console, e.g. 'grape-spaceship-123'. We will also check the environment variable GCLOUD_PROJECT for your project ID. If your app is running in an environment which supports Application Default Credentials, your project ID will be detected automatically.
apiEndpoint string <optional>

The domain name of the API remote host.
clientConfig gax.ClientConfig <optional>

Client configuration override. Follows the structure of gapicConfig.
fallback boolean <optional>

Use HTTP/1.1 REST mode. For more information, please check the documentation.
gaxInstance gax <optional>

loaded instance of google-gax. Useful if you need to avoid loading the default gRPC version and want to use the fallback HTTP implementation. Load only fallback version and pass it to the constructor: const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC const client = new WorkflowsClient({fallback: true}, gax);

Members

apiEndpoint

The DNS address for this API service.

apiEndpoint

The DNS address for this API service - same as servicePath.

port

The port for this API service.

scopes

The scopes needed to make gRPC calls for every method defined in this service.

servicePath

The DNS address for this API service.

Methods

cancelOperation(request, optionsopt, callbackopt) → {Promise}

Starts asynchronous cancellation on a long-running operation. The server makes a best effort to cancel the operation, but success is not guaranteed. If the server doesn't support this method, it returns google.rpc.Code.UNIMPLEMENTED. Clients can use Operations.GetOperation or other methods to check whether the cancellation succeeded or whether the operation completed despite cancellation. On successful cancellation, the operation is not deleted; instead, it becomes an operation with an Operation.error value with a google.rpc.Status.code of 1, corresponding to Code.CANCELLED.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

The name of the operation resource to be cancelled.
options Object <optional>

Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
callback function <optional>

The function which will be called with the result of the API call.
Returns:
Type Description
Promise
  • The promise which resolves when API call finishes. The promise has a method named "cancel" which cancels the ongoing API call.
Example
```
const client = longrunning.operationsClient();
await client.cancelOperation({name: ''});
```

(async) checkCreateWorkflowProgress(name) → {Promise}

Check the status of the long running operation returned by createWorkflow().

Parameters:
Name Type Description
name String

The operation name that will be passed.
Returns:
Type Description
Promise
  • The promise which resolves to an object. The decoded operation object has result and metadata field to get information from. Please see the documentation for more details and examples.
Example
  /**
   * This snippet has been automatically generated and should be regarded as a code template only.
   * It will require modifications to work.
   * It may require correct/in-range values for request initialization.
   * TODO(developer): Uncomment these variables before running the sample.
   */
  /**
   *  Required. Project and location in which the workflow should be created.
   *  Format:  projects/{project}/locations/{location}
   */
  // const parent = 'abc123'
  /**
   *  Required. Workflow to be created.
   */
  // const workflow = {}
  /**
   *  Required. The ID of the workflow to be created. It has to fulfill the
   *  following requirements:
   *  * Must contain only letters, numbers, underscores and hyphens.
   *  * Must start with a letter.
   *  * Must be between 1-64 characters.
   *  * Must end with a number or a letter.
   *  * Must be unique within the customer project and location.
   */
  // const workflowId = 'abc123'

  // Imports the Workflows library
  const {WorkflowsClient} = require('@google-cloud/workflows').v1beta;

  // Instantiates a client
  const workflowsClient = new WorkflowsClient();

  async function callCreateWorkflow() {
    // Construct request
    const request = {
      parent,
      workflow,
      workflowId,
    };

    // Run request
    const [operation] = await workflowsClient.createWorkflow(request);
    const [response] = await operation.promise();
    console.log(response);
  }

  callCreateWorkflow();

(async) checkDeleteWorkflowProgress(name) → {Promise}

Check the status of the long running operation returned by deleteWorkflow().

Parameters:
Name Type Description
name String

The operation name that will be passed.
Returns:
Type Description
Promise
  • The promise which resolves to an object. The decoded operation object has result and metadata field to get information from. Please see the documentation for more details and examples.
Example
  /**
   * This snippet has been automatically generated and should be regarded as a code template only.
   * It will require modifications to work.
   * It may require correct/in-range values for request initialization.
   * TODO(developer): Uncomment these variables before running the sample.
   */
  /**
   *  Required. Name of the workflow to be deleted.
   *  Format: projects/{project}/locations/{location}/workflows/{workflow}
   */
  // const name = 'abc123'

  // Imports the Workflows library
  const {WorkflowsClient} = require('@google-cloud/workflows').v1beta;

  // Instantiates a client
  const workflowsClient = new WorkflowsClient();

  async function callDeleteWorkflow() {
    // Construct request
    const request = {
      name,
    };

    // Run request
    const [operation] = await workflowsClient.deleteWorkflow(request);
    const [response] = await operation.promise();
    console.log(response);
  }

  callDeleteWorkflow();

(async) checkUpdateWorkflowProgress(name) → {Promise}

Check the status of the long running operation returned by updateWorkflow().

Parameters:
Name Type Description
name String

The operation name that will be passed.
Returns:
Type Description
Promise
  • The promise which resolves to an object. The decoded operation object has result and metadata field to get information from. Please see the documentation for more details and examples.
Example
  /**
   * This snippet has been automatically generated and should be regarded as a code template only.
   * It will require modifications to work.
   * It may require correct/in-range values for request initialization.
   * TODO(developer): Uncomment these variables before running the sample.
   */
  /**
   *  Required. Workflow to be updated.
   */
  // const workflow = {}
  /**
   *  List of fields to be updated. If not present, the entire workflow
   *  will be updated.
   */
  // const updateMask = {}

  // Imports the Workflows library
  const {WorkflowsClient} = require('@google-cloud/workflows').v1beta;

  // Instantiates a client
  const workflowsClient = new WorkflowsClient();

  async function callUpdateWorkflow() {
    // Construct request
    const request = {
      workflow,
    };

    // Run request
    const [operation] = await workflowsClient.updateWorkflow(request);
    const [response] = await operation.promise();
    console.log(response);
  }

  callUpdateWorkflow();

close() → {Promise}

Terminate the gRPC channel and close the client.

The client will no longer be usable and all future behavior is undefined.

Returns:
Type Description
Promise

A promise that resolves when the client is closed.

deleteOperation(request, optionsopt, callbackopt) → {Promise}

Deletes a long-running operation. This method indicates that the client is no longer interested in the operation result. It does not cancel the operation. If the server doesn't support this method, it returns google.rpc.Code.UNIMPLEMENTED.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

The name of the operation resource to be deleted.
options Object <optional>

Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
callback function <optional>

The function which will be called with the result of the API call.
Returns:
Type Description
Promise
  • The promise which resolves when API call finishes. The promise has a method named "cancel" which cancels the ongoing API call.
Example
```
const client = longrunning.operationsClient();
await client.deleteOperation({name: ''});
```

getLocation(request, optionsopt) → {Promise}

Gets information about a location.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

Resource name for the location.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Location. Please see the documentation for more details and examples.
Example
```
const [response] = await client.getLocation(request);
```

getOperation(request, optionsopt, callbackopt) → {Promise}

Gets the latest state of a long-running operation. Clients can use this method to poll the operation result at intervals as recommended by the API service.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

The name of the operation resource.
options Object <optional>

Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
callback function <optional>

The function which will be called with the result of the API call.

The second parameter to the callback is an object representing google.longrunning.Operation.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing google.longrunning.Operation. The promise has a method named "cancel" which cancels the ongoing API call.
Example
```
const client = longrunning.operationsClient();
const name = '';
const [response] = await client.getOperation({name});
// doThingsWith(response)
```

getProjectId() → {Promise}

Return the project ID used by this class.

Returns:
Type Description
Promise

A promise that resolves to string containing the project ID.

initialize() → {Promise}

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:
Type Description
Promise

A promise that resolves to an authenticated service stub.

listLocationsAsync(request, optionsopt) → {Object}

Lists information about the supported locations for this service. Returns an iterable object.

for-await-of syntax is used with the iterable to get response elements on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

The resource that owns the locations collection, if applicable.
filter string

The standard list filter.
pageSize number

The standard list page size.
pageToken string

The standard list page token.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Object

An iterable Object that allows async iteration. When you iterate the returned iterable, each element will be an object representing Location. The API will be called under the hood as needed, once per the page, so you can stop the iteration when you don't need more results. Please see the documentation for more details and examples.
Example
```
const iterable = client.listLocationsAsync(request);
for await (const response of iterable) {
  // process response
}
```

listOperationsAsync(request, optionsopt) → {Object}

Lists operations that match the specified filter in the request. If the server doesn't support this method, it returns UNIMPLEMENTED. Returns an iterable object.

For-await-of syntax is used with the iterable to recursively get response element on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Attributes Description
name string

The name of the operation collection.
filter string

The standard list filter.
pageSize number <optional>

The maximum number of resources contained in the underlying API response. If page streaming is performed per-resource, this parameter does not affect the return value. If page streaming is performed per-page, this determines the maximum number of resources in a page.
options Object <optional>

Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
Returns:
Type Description
Object

An iterable Object that conforms to iteration protocols.
Example
```
const client = longrunning.operationsClient();
for await (const response of client.listOperationsAsync(request));
// doThingsWith(response)
```

listWorkflowsAsync(request, optionsopt) → {Object}

Equivalent to listWorkflows, but returns an iterable object.

for-await-of syntax is used with the iterable to get response elements on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. Project and location from which the workflows should be listed. Format: projects/{project}/locations/{location}
pageSize number

Maximum number of workflows to return per call. The service may return fewer than this value. If the value is not specified, a default value of 500 will be used. The maximum permitted value is 1000 and values greater than 1000 will be coerced down to 1000.
pageToken string

A page token, received from a previous ListWorkflows call. Provide this to retrieve the subsequent page.

When paginating, all other parameters provided to ListWorkflows must match the call that provided the page token.
filter string

Filter to restrict results to specific workflows.
orderBy string

Comma-separated list of fields that that specify the order of the results. Default sorting order for a field is ascending. To specify descending order for a field, append a " desc" suffix. If not specified, the results will be returned in an unspecified order.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Object

An iterable Object that allows async iteration. When you iterate the returned iterable, each element will be an object representing Workflow. The API will be called under the hood as needed, once per the page, so you can stop the iteration when you don't need more results. Please see the documentation for more details and examples.
Example
  /**
   * This snippet has been automatically generated and should be regarded as a code template only.
   * It will require modifications to work.
   * It may require correct/in-range values for request initialization.
   * TODO(developer): Uncomment these variables before running the sample.
   */
  /**
   *  Required. Project and location from which the workflows should be listed.
   *  Format: projects/{project}/locations/{location}
   */
  // const parent = 'abc123'
  /**
   *  Maximum number of workflows to return per call. The service may return
   *  fewer than this value. If the value is not specified, a default value of
   *  500 will be used. The maximum permitted value is 1000 and values greater
   *  than 1000 will be coerced down to 1000.
   */
  // const pageSize = 1234
  /**
   *  A page token, received from a previous `ListWorkflows` call.
   *  Provide this to retrieve the subsequent page.
   *  When paginating, all other parameters provided to `ListWorkflows` must
   *  match the call that provided the page token.
   */
  // const pageToken = 'abc123'
  /**
   *  Filter to restrict results to specific workflows.
   */
  // const filter = 'abc123'
  /**
   *  Comma-separated list of fields that that specify the order of the results.
   *  Default sorting order for a field is ascending. To specify descending order
   *  for a field, append a " desc" suffix.
   *  If not specified, the results will be returned in an unspecified order.
   */
  // const orderBy = 'abc123'

  // Imports the Workflows library
  const {WorkflowsClient} = require('@google-cloud/workflows').v1beta;

  // Instantiates a client
  const workflowsClient = new WorkflowsClient();

  async function callListWorkflows() {
    // Construct request
    const request = {
      parent,
    };

    // Run request
    const iterable = workflowsClient.listWorkflowsAsync(request);
    for await (const response of iterable) {
        console.log(response);
    }
  }

  callListWorkflows();

listWorkflowsStream(request, optionsopt) → {Stream}

Equivalent to listWorkflows, but returns a NodeJS Stream object.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. Project and location from which the workflows should be listed. Format: projects/{project}/locations/{location}
pageSize number

Maximum number of workflows to return per call. The service may return fewer than this value. If the value is not specified, a default value of 500 will be used. The maximum permitted value is 1000 and values greater than 1000 will be coerced down to 1000.
pageToken string

A page token, received from a previous ListWorkflows call. Provide this to retrieve the subsequent page.

When paginating, all other parameters provided to ListWorkflows must match the call that provided the page token.
filter string

Filter to restrict results to specific workflows.
orderBy string

Comma-separated list of fields that that specify the order of the results. Default sorting order for a field is ascending. To specify descending order for a field, append a " desc" suffix. If not specified, the results will be returned in an unspecified order.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits an object representing Workflow on 'data' event. The client library will perform auto-pagination by default: it will call the API as many times as needed. Note that it can affect your quota. We recommend using listWorkflowsAsync() method described below for async iteration which you can stop as needed. Please see the documentation for more details and examples.

locationPath(project, location) → {string}

Return a fully-qualified location resource name string.

Parameters:
Name Type Description
project string
location string
Returns:
Type Description
string

Resource name string.

matchLocationFromLocationName(locationName) → {string}

Parse the location from Location resource.

Parameters:
Name Type Description
locationName string

A fully-qualified path representing Location resource.
Returns:
Type Description
string

A string representing the location.

matchLocationFromWorkflowName(workflowName) → {string}

Parse the location from Workflow resource.

Parameters:
Name Type Description
workflowName string

A fully-qualified path representing Workflow resource.
Returns:
Type Description
string

A string representing the location.

matchProjectFromLocationName(locationName) → {string}

Parse the project from Location resource.

Parameters:
Name Type Description
locationName string

A fully-qualified path representing Location resource.
Returns:
Type Description
string

A string representing the project.

matchProjectFromWorkflowName(workflowName) → {string}

Parse the project from Workflow resource.

Parameters:
Name Type Description
workflowName string

A fully-qualified path representing Workflow resource.
Returns:
Type Description
string

A string representing the project.

matchWorkflowFromWorkflowName(workflowName) → {string}

Parse the workflow from Workflow resource.

Parameters:
Name Type Description
workflowName string

A fully-qualified path representing Workflow resource.
Returns:
Type Description
string

A string representing the workflow.

workflowPath(project, location, workflow) → {string}

Return a fully-qualified workflow resource name string.

Parameters:
Name Type Description
project string
location string
workflow string
Returns:
Type Description
string

Resource name string.