hostpools.go

package desktopvirtualization

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
// Code generated by Microsoft (R) AutoRest Code Generator.
// Changes may cause incorrect behavior and will be lost if the code is regenerated.

import (
	"context"
	"github.com/Azure/go-autorest/autorest"
	"github.com/Azure/go-autorest/autorest/azure"
	"github.com/Azure/go-autorest/autorest/validation"
	"github.com/Azure/go-autorest/tracing"
	"net/http"
)

// HostPoolsClient is the client for the HostPools methods of the Desktopvirtualization service.
type HostPoolsClient struct {
	BaseClient
}

// NewHostPoolsClient creates an instance of the HostPoolsClient client.
func NewHostPoolsClient(subscriptionID string) HostPoolsClient {
	return NewHostPoolsClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewHostPoolsClientWithBaseURI creates an instance of the HostPoolsClient client using a custom endpoint.  Use this
// when interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
func NewHostPoolsClientWithBaseURI(baseURI string, subscriptionID string) HostPoolsClient {
	return HostPoolsClient{NewWithBaseURI(baseURI, subscriptionID)}
}

// CreateOrUpdate create or update a host pool.
// Parameters:
// resourceGroupName - the name of the resource group. The name is case insensitive.
// hostPoolName - the name of the host pool within the specified resource group
// hostPool - object containing HostPool definitions.
func (client HostPoolsClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, hostPoolName string, hostPool HostPool) (result HostPool, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.CreateOrUpdate")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}},
		{TargetValue: hostPoolName,
			Constraints: []validation.Constraint{{Target: "hostPoolName", Name: validation.MaxLength, Rule: 24, Chain: nil},
				{Target: "hostPoolName", Name: validation.MinLength, Rule: 3, Chain: nil}}},
		{TargetValue: hostPool,
			Constraints: []validation.Constraint{{Target: "hostPool.HostPoolProperties", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "CreateOrUpdate", err.Error())
	}

	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, hostPoolName, hostPool)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

	resp, err := client.CreateOrUpdateSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "CreateOrUpdate", resp, "Failure sending request")
		return
	}

	result, err = client.CreateOrUpdateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "CreateOrUpdate", resp, "Failure responding to request")
		return
	}

	return
}

// CreateOrUpdatePreparer prepares the CreateOrUpdate request.
func (client HostPoolsClient) CreateOrUpdatePreparer(ctx context.Context, resourceGroupName string, hostPoolName string, hostPool HostPool) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"hostPoolName":      autorest.Encode("path", hostPoolName),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPut(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DesktopVirtualization/hostPools/{hostPoolName}", pathParameters),
		autorest.WithJSON(hostPool),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// CreateOrUpdateSender sends the CreateOrUpdate request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) CreateOrUpdateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// CreateOrUpdateResponder handles the response to the CreateOrUpdate request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) CreateOrUpdateResponder(resp *http.Response) (result HostPool, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusCreated),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Delete remove a host pool.
// Parameters:
// resourceGroupName - the name of the resource group. The name is case insensitive.
// hostPoolName - the name of the host pool within the specified resource group
// force - force flag to delete sessionHost.
func (client HostPoolsClient) Delete(ctx context.Context, resourceGroupName string, hostPoolName string, force *bool) (result autorest.Response, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.Delete")
		defer func() {
			sc := -1
			if result.Response != nil {
				sc = result.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}},
		{TargetValue: hostPoolName,
			Constraints: []validation.Constraint{{Target: "hostPoolName", Name: validation.MaxLength, Rule: 24, Chain: nil},
				{Target: "hostPoolName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "Delete", err.Error())
	}

	req, err := client.DeletePreparer(ctx, resourceGroupName, hostPoolName, force)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Delete", nil, "Failure preparing request")
		return
	}

	resp, err := client.DeleteSender(req)
	if err != nil {
		result.Response = resp
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Delete", resp, "Failure sending request")
		return
	}

	result, err = client.DeleteResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Delete", resp, "Failure responding to request")
		return
	}

	return
}

// DeletePreparer prepares the Delete request.
func (client HostPoolsClient) DeletePreparer(ctx context.Context, resourceGroupName string, hostPoolName string, force *bool) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"hostPoolName":      autorest.Encode("path", hostPoolName),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}
	if force != nil {
		queryParameters["force"] = autorest.Encode("query", *force)
	}

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DesktopVirtualization/hostPools/{hostPoolName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// DeleteSender sends the Delete request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) DeleteSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// DeleteResponder handles the response to the Delete request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) DeleteResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusNoContent),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Get get a host pool.
// Parameters:
// resourceGroupName - the name of the resource group. The name is case insensitive.
// hostPoolName - the name of the host pool within the specified resource group
func (client HostPoolsClient) Get(ctx context.Context, resourceGroupName string, hostPoolName string) (result HostPool, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.Get")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}},
		{TargetValue: hostPoolName,
			Constraints: []validation.Constraint{{Target: "hostPoolName", Name: validation.MaxLength, Rule: 24, Chain: nil},
				{Target: "hostPoolName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "Get", err.Error())
	}

	req, err := client.GetPreparer(ctx, resourceGroupName, hostPoolName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Get", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Get", resp, "Failure sending request")
		return
	}

	result, err = client.GetResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Get", resp, "Failure responding to request")
		return
	}

	return
}

// GetPreparer prepares the Get request.
func (client HostPoolsClient) GetPreparer(ctx context.Context, resourceGroupName string, hostPoolName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"hostPoolName":      autorest.Encode("path", hostPoolName),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DesktopVirtualization/hostPools/{hostPoolName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetSender sends the Get request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) GetSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// GetResponder handles the response to the Get request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) GetResponder(resp *http.Response) (result HostPool, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// List list hostPools in subscription.
func (client HostPoolsClient) List(ctx context.Context) (result HostPoolListPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.List")
		defer func() {
			sc := -1
			if result.hpl.Response.Response != nil {
				sc = result.hpl.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "List", err.Error())
	}

	result.fn = client.listNextResults
	req, err := client.ListPreparer(ctx)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "List", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListSender(req)
	if err != nil {
		result.hpl.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "List", resp, "Failure sending request")
		return
	}

	result.hpl, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "List", resp, "Failure responding to request")
		return
	}
	if result.hpl.hasNextLink() && result.hpl.IsEmpty() {
		err = result.NextWithContext(ctx)
		return
	}

	return
}

// ListPreparer prepares the List request.
func (client HostPoolsClient) ListPreparer(ctx context.Context) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"subscriptionId": autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/providers/Microsoft.DesktopVirtualization/hostPools", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListSender sends the List request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) ListSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// ListResponder handles the response to the List request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) ListResponder(resp *http.Response) (result HostPoolList, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// listNextResults retrieves the next set of results, if any.
func (client HostPoolsClient) listNextResults(ctx context.Context, lastResults HostPoolList) (result HostPoolList, err error) {
	req, err := lastResults.hostPoolListPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListComplete enumerates all values, automatically crossing page boundaries as required.
func (client HostPoolsClient) ListComplete(ctx context.Context) (result HostPoolListIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.List")
		defer func() {
			sc := -1
			if result.Response().Response.Response != nil {
				sc = result.page.Response().Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.page, err = client.List(ctx)
	return
}

// ListByResourceGroup list hostPools.
// Parameters:
// resourceGroupName - the name of the resource group. The name is case insensitive.
func (client HostPoolsClient) ListByResourceGroup(ctx context.Context, resourceGroupName string) (result HostPoolListPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.ListByResourceGroup")
		defer func() {
			sc := -1
			if result.hpl.Response.Response != nil {
				sc = result.hpl.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "ListByResourceGroup", err.Error())
	}

	result.fn = client.listByResourceGroupNextResults
	req, err := client.ListByResourceGroupPreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "ListByResourceGroup", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListByResourceGroupSender(req)
	if err != nil {
		result.hpl.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "ListByResourceGroup", resp, "Failure sending request")
		return
	}

	result.hpl, err = client.ListByResourceGroupResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "ListByResourceGroup", resp, "Failure responding to request")
		return
	}
	if result.hpl.hasNextLink() && result.hpl.IsEmpty() {
		err = result.NextWithContext(ctx)
		return
	}

	return
}

// ListByResourceGroupPreparer prepares the ListByResourceGroup request.
func (client HostPoolsClient) ListByResourceGroupPreparer(ctx context.Context, resourceGroupName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DesktopVirtualization/hostPools", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListByResourceGroupSender sends the ListByResourceGroup request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) ListByResourceGroupSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// ListByResourceGroupResponder handles the response to the ListByResourceGroup request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) ListByResourceGroupResponder(resp *http.Response) (result HostPoolList, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// listByResourceGroupNextResults retrieves the next set of results, if any.
func (client HostPoolsClient) listByResourceGroupNextResults(ctx context.Context, lastResults HostPoolList) (result HostPoolList, err error) {
	req, err := lastResults.hostPoolListPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listByResourceGroupNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListByResourceGroupSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listByResourceGroupNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListByResourceGroupResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "listByResourceGroupNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListByResourceGroupComplete enumerates all values, automatically crossing page boundaries as required.
func (client HostPoolsClient) ListByResourceGroupComplete(ctx context.Context, resourceGroupName string) (result HostPoolListIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.ListByResourceGroup")
		defer func() {
			sc := -1
			if result.Response().Response.Response != nil {
				sc = result.page.Response().Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.page, err = client.ListByResourceGroup(ctx, resourceGroupName)
	return
}

// Update update a host pool.
// Parameters:
// resourceGroupName - the name of the resource group. The name is case insensitive.
// hostPoolName - the name of the host pool within the specified resource group
// hostPool - object containing HostPool definitions.
func (client HostPoolsClient) Update(ctx context.Context, resourceGroupName string, hostPoolName string, hostPool *HostPoolPatch) (result HostPool, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/HostPoolsClient.Update")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: client.SubscriptionID,
			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}},
		{TargetValue: hostPoolName,
			Constraints: []validation.Constraint{{Target: "hostPoolName", Name: validation.MaxLength, Rule: 24, Chain: nil},
				{Target: "hostPoolName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("desktopvirtualization.HostPoolsClient", "Update", err.Error())
	}

	req, err := client.UpdatePreparer(ctx, resourceGroupName, hostPoolName, hostPool)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Update", nil, "Failure preparing request")
		return
	}

	resp, err := client.UpdateSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Update", resp, "Failure sending request")
		return
	}

	result, err = client.UpdateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "desktopvirtualization.HostPoolsClient", "Update", resp, "Failure responding to request")
		return
	}

	return
}

// UpdatePreparer prepares the Update request.
func (client HostPoolsClient) UpdatePreparer(ctx context.Context, resourceGroupName string, hostPoolName string, hostPool *HostPoolPatch) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"hostPoolName":      autorest.Encode("path", hostPoolName),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-09-24-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPatch(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DesktopVirtualization/hostPools/{hostPoolName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if hostPool != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(hostPool))
	}
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// UpdateSender sends the Update request. The method will close the
// http.Response Body if it receives an error.
func (client HostPoolsClient) UpdateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// UpdateResponder handles the response to the Update request. The method always
// closes the http.Response Body.
func (client HostPoolsClient) UpdateResponder(resp *http.Response) (result HostPool, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}