1// Code generated by smithy-go-codegen DO NOT EDIT.
2
3package appmesh
4
5import (
6	"context"
7	"fmt"
8	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
9	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
10	"github.com/aws/aws-sdk-go-v2/service/appmesh/types"
11	"github.com/aws/smithy-go/middleware"
12	smithyhttp "github.com/aws/smithy-go/transport/http"
13)
14
15// Returns a list of existing service meshes.
16func (c *Client) ListMeshes(ctx context.Context, params *ListMeshesInput, optFns ...func(*Options)) (*ListMeshesOutput, error) {
17	if params == nil {
18		params = &ListMeshesInput{}
19	}
20
21	result, metadata, err := c.invokeOperation(ctx, "ListMeshes", params, optFns, addOperationListMeshesMiddlewares)
22	if err != nil {
23		return nil, err
24	}
25
26	out := result.(*ListMeshesOutput)
27	out.ResultMetadata = metadata
28	return out, nil
29}
30
31//
32type ListMeshesInput struct {
33
34	// The maximum number of results returned by ListMeshes in paginated output. When
35	// you use this parameter, ListMeshes returns only limit results in a single page
36	// along with a nextToken response element. You can see the remaining results of
37	// the initial request by sending another ListMeshes request with the returned
38	// nextToken value. This value can be between 1 and 100. If you don't use this
39	// parameter, ListMeshes returns up to 100 results and a nextToken value if
40	// applicable.
41	Limit *int32
42
43	// The nextToken value returned from a previous paginated ListMeshes request where
44	// limit was used and the results exceeded the value of that parameter. Pagination
45	// continues from the end of the previous results that returned the nextToken
46	// value. This token should be treated as an opaque identifier that is used only to
47	// retrieve the next items in a list and not for other programmatic purposes.
48	NextToken *string
49}
50
51//
52type ListMeshesOutput struct {
53
54	// The list of existing service meshes.
55	//
56	// This member is required.
57	Meshes []types.MeshRef
58
59	// The nextToken value to include in a future ListMeshes request. When the results
60	// of a ListMeshes request exceed limit, you can use this value to retrieve the
61	// next page of results. This value is null when there are no more results to
62	// return.
63	NextToken *string
64
65	// Metadata pertaining to the operation's result.
66	ResultMetadata middleware.Metadata
67}
68
69func addOperationListMeshesMiddlewares(stack *middleware.Stack, options Options) (err error) {
70	err = stack.Serialize.Add(&awsRestjson1_serializeOpListMeshes{}, middleware.After)
71	if err != nil {
72		return err
73	}
74	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpListMeshes{}, middleware.After)
75	if err != nil {
76		return err
77	}
78	if err = addSetLoggerMiddleware(stack, options); err != nil {
79		return err
80	}
81	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
82		return err
83	}
84	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
85		return err
86	}
87	if err = addResolveEndpointMiddleware(stack, options); err != nil {
88		return err
89	}
90	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
91		return err
92	}
93	if err = addRetryMiddlewares(stack, options); err != nil {
94		return err
95	}
96	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
97		return err
98	}
99	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
100		return err
101	}
102	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
103		return err
104	}
105	if err = addClientUserAgent(stack); err != nil {
106		return err
107	}
108	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
109		return err
110	}
111	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
112		return err
113	}
114	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
115		return err
116	}
117	if err = addResponseErrorMiddleware(stack); err != nil {
118		return err
119	}
120	if err = addRequestResponseLogging(stack, options); err != nil {
121		return err
122	}
123	return nil
124}
125
126// ListMeshesAPIClient is a client that implements the ListMeshes operation.
127type ListMeshesAPIClient interface {
128	ListMeshes(context.Context, *ListMeshesInput, ...func(*Options)) (*ListMeshesOutput, error)
129}
130
131var _ ListMeshesAPIClient = (*Client)(nil)
132
133// ListMeshesPaginatorOptions is the paginator options for ListMeshes
134type ListMeshesPaginatorOptions struct {
135	// The maximum number of results returned by ListMeshes in paginated output. When
136	// you use this parameter, ListMeshes returns only limit results in a single page
137	// along with a nextToken response element. You can see the remaining results of
138	// the initial request by sending another ListMeshes request with the returned
139	// nextToken value. This value can be between 1 and 100. If you don't use this
140	// parameter, ListMeshes returns up to 100 results and a nextToken value if
141	// applicable.
142	Limit int32
143
144	// Set to true if pagination should stop if the service returns a pagination token
145	// that matches the most recent token provided to the service.
146	StopOnDuplicateToken bool
147}
148
149// ListMeshesPaginator is a paginator for ListMeshes
150type ListMeshesPaginator struct {
151	options   ListMeshesPaginatorOptions
152	client    ListMeshesAPIClient
153	params    *ListMeshesInput
154	nextToken *string
155	firstPage bool
156}
157
158// NewListMeshesPaginator returns a new ListMeshesPaginator
159func NewListMeshesPaginator(client ListMeshesAPIClient, params *ListMeshesInput, optFns ...func(*ListMeshesPaginatorOptions)) *ListMeshesPaginator {
160	if params == nil {
161		params = &ListMeshesInput{}
162	}
163
164	options := ListMeshesPaginatorOptions{}
165	if params.Limit != nil {
166		options.Limit = *params.Limit
167	}
168
169	for _, fn := range optFns {
170		fn(&options)
171	}
172
173	return &ListMeshesPaginator{
174		options:   options,
175		client:    client,
176		params:    params,
177		firstPage: true,
178	}
179}
180
181// HasMorePages returns a boolean indicating whether more pages are available
182func (p *ListMeshesPaginator) HasMorePages() bool {
183	return p.firstPage || p.nextToken != nil
184}
185
186// NextPage retrieves the next ListMeshes page.
187func (p *ListMeshesPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*ListMeshesOutput, error) {
188	if !p.HasMorePages() {
189		return nil, fmt.Errorf("no more pages available")
190	}
191
192	params := *p.params
193	params.NextToken = p.nextToken
194
195	var limit *int32
196	if p.options.Limit > 0 {
197		limit = &p.options.Limit
198	}
199	params.Limit = limit
200
201	result, err := p.client.ListMeshes(ctx, &params, optFns...)
202	if err != nil {
203		return nil, err
204	}
205	p.firstPage = false
206
207	prevToken := p.nextToken
208	p.nextToken = result.NextToken
209
210	if p.options.StopOnDuplicateToken && prevToken != nil && p.nextToken != nil && *prevToken == *p.nextToken {
211		p.nextToken = nil
212	}
213
214	return result, nil
215}
216