/******************************************************************************* * Copyright 2012-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * Licensed under the Apache License, Version 2.0 (the "License"). You may not use * this file except in compliance with the License. A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. * ***************************************************************************** * * AWS Tools for Windows (TM) PowerShell (TM) * */ using System; using System.Collections.Generic; using System.Linq; using System.Management.Automation; using System.Text; using Amazon.PowerShell.Common; using Amazon.Runtime; using Amazon.QLDB; using Amazon.QLDB.Model; namespace Amazon.PowerShell.Cmdlets.QLDB { /// <summary> /// Returns all ledgers that are associated with the current Amazon Web Services account /// and Region. /// /// /// <para> /// This action returns a maximum of <code>MaxResults</code> items and is paginated so /// that you can retrieve all the items by calling <code>ListLedgers</code> multiple times. /// </para><br/><br/>This cmdlet automatically pages all available results to the pipeline - parameters related to iteration are only needed if you want to manually control the paginated output. To disable autopagination, use -NoAutoIteration. /// </summary> [Cmdlet("Get", "QLDBLedgerList")] [OutputType("Amazon.QLDB.Model.LedgerSummary")] [AWSCmdlet("Calls the Amazon QLDB ListLedgers API operation.", Operation = new[] {"ListLedgers"}, SelectReturnType = typeof(Amazon.QLDB.Model.ListLedgersResponse))] [AWSCmdletOutput("Amazon.QLDB.Model.LedgerSummary or Amazon.QLDB.Model.ListLedgersResponse", "This cmdlet returns a collection of Amazon.QLDB.Model.LedgerSummary objects.", "The service call response (type Amazon.QLDB.Model.ListLedgersResponse) can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack." )] public partial class GetQLDBLedgerListCmdlet : AmazonQLDBClientCmdlet, IExecutor { #region Parameter MaxResult /// <summary> /// <para> /// <para>The maximum number of results to return in a single <code>ListLedgers</code> request. /// (The actual number of results returned might be fewer.)</para> /// </para> /// <para> /// <br/><b>Note:</b> In AWSPowerShell and AWSPowerShell.NetCore this parameter is used to limit the total number of items returned by the cmdlet. /// <br/>In AWS.Tools this parameter is simply passed to the service to specify how many items should be returned by each service call. /// <br/>Pipe the output of this cmdlet into Select-Object -First to terminate retrieving data pages early and control the number of items returned. /// </para> /// </summary> [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)] [Alias("MaxItems","MaxResults")] public int? MaxResult { get; set; } #endregion #region Parameter NextToken /// <summary> /// <para> /// <para>A pagination token, indicating that you want to retrieve the next page of results. /// If you received a value for <code>NextToken</code> in the response from a previous /// <code>ListLedgers</code> call, then you should use that value as input here.</para> /// </para> /// <para> /// <br/><b>Note:</b> This parameter is only used if you are manually controlling output pagination of the service API call. /// <br/>In order to manually control output pagination, use '-NextToken $null' for the first call and '-NextToken $AWSHistory.LastServiceResponse.NextToken' for subsequent calls. /// </para> /// </summary> [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)] public System.String NextToken { get; set; } #endregion #region Parameter Select /// <summary> /// Use the -Select parameter to control the cmdlet output. The default value is 'Ledgers'. /// Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.QLDB.Model.ListLedgersResponse). /// Specifying the name of a property of type Amazon.QLDB.Model.ListLedgersResponse will result in that property being returned. /// Specifying -Select '^ParameterName' will result in the cmdlet returning the selected cmdlet parameter value. /// </summary> [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)] public string Select { get; set; } = "Ledgers"; #endregion #region Parameter NoAutoIteration /// <summary> /// By default the cmdlet will auto-iterate and retrieve all results to the pipeline by performing multiple /// service calls. If set, the cmdlet will retrieve only the next 'page' of results using the value of NextToken /// as the start point. /// </summary> [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)] public SwitchParameter NoAutoIteration { get; set; } #endregion protected override void ProcessRecord() { this._AWSSignerType = "v4"; base.ProcessRecord(); var context = new CmdletContext(); // allow for manipulation of parameters prior to loading into context PreExecutionContextLoad(context); if (ParameterWasBound(nameof(this.Select))) { context.Select = CreateSelectDelegate<Amazon.QLDB.Model.ListLedgersResponse, GetQLDBLedgerListCmdlet>(Select) ?? throw new System.ArgumentException("Invalid value for -Select parameter.", nameof(this.Select)); } context.MaxResult = this.MaxResult; #if !MODULAR if (ParameterWasBound(nameof(this.MaxResult)) && this.MaxResult.HasValue) { WriteWarning("AWSPowerShell and AWSPowerShell.NetCore use the MaxResult parameter to limit the total number of items returned by the cmdlet." + " This behavior is obsolete and will be removed in a future version of these modules. Pipe the output of this cmdlet into Select-Object -First to terminate" + " retrieving data pages early and control the number of items returned. AWS.Tools already implements the new behavior of simply passing MaxResult" + " to the service to specify how many items should be returned by each service call."); } #endif context.NextToken = this.NextToken; // allow further manipulation of loaded context prior to processing PostExecutionContextLoad(context); var output = Execute(context) as CmdletOutput; ProcessOutput(output); } #region IExecutor Members #if MODULAR public object Execute(ExecutorContext context) { var cmdletContext = context as CmdletContext; var useParameterSelect = this.Select.StartsWith("^"); // create request and set iteration invariants var request = new Amazon.QLDB.Model.ListLedgersRequest(); if (cmdletContext.MaxResult != null) { request.MaxResults = AutoIterationHelpers.ConvertEmitLimitToServiceTypeInt32(cmdletContext.MaxResult.Value); } // Initialize loop variant and commence piping var _nextToken = cmdletContext.NextToken; var _userControllingPaging = this.NoAutoIteration.IsPresent || ParameterWasBound(nameof(this.NextToken)); var client = Client ?? CreateClient(_CurrentCredentials, _RegionEndpoint); do { request.NextToken = _nextToken; CmdletOutput output; try { var response = CallAWSServiceOperation(client, request); object pipelineOutput = null; if (!useParameterSelect) { pipelineOutput = cmdletContext.Select(response, this); } output = new CmdletOutput { PipelineOutput = pipelineOutput, ServiceResponse = response }; _nextToken = response.NextToken; } catch (Exception e) { output = new CmdletOutput { ErrorResponse = e }; } ProcessOutput(output); } while (!_userControllingPaging && AutoIterationHelpers.HasValue(_nextToken)); if (useParameterSelect) { WriteObject(cmdletContext.Select(null, this)); } return null; } #else public object Execute(ExecutorContext context) { var cmdletContext = context as CmdletContext; var useParameterSelect = this.Select.StartsWith("^"); // create request and set iteration invariants var request = new Amazon.QLDB.Model.ListLedgersRequest(); // Initialize loop variants and commence piping System.String _nextToken = null; int? _emitLimit = null; int _retrievedSoFar = 0; if (AutoIterationHelpers.HasValue(cmdletContext.NextToken)) { _nextToken = cmdletContext.NextToken; } if (cmdletContext.MaxResult.HasValue) { // The service has a maximum page size of 100. If the user has // asked for more items than page max, and there is no page size // configured, we rely on the service ignoring the set maximum // and giving us 100 items back. If a page size is set, that will // be used to configure the pagination. // We'll make further calls to satisfy the user's request. _emitLimit = cmdletContext.MaxResult; } var _userControllingPaging = this.NoAutoIteration.IsPresent || ParameterWasBound(nameof(this.NextToken)); var client = Client ?? CreateClient(_CurrentCredentials, _RegionEndpoint); do { request.NextToken = _nextToken; if (_emitLimit.HasValue) { int correctPageSize = Math.Min(100, _emitLimit.Value); request.MaxResults = AutoIterationHelpers.ConvertEmitLimitToInt32(correctPageSize); } CmdletOutput output; try { var response = CallAWSServiceOperation(client, request); object pipelineOutput = null; if (!useParameterSelect) { pipelineOutput = cmdletContext.Select(response, this); } output = new CmdletOutput { PipelineOutput = pipelineOutput, ServiceResponse = response }; int _receivedThisCall = response.Ledgers.Count; _nextToken = response.NextToken; _retrievedSoFar += _receivedThisCall; if (_emitLimit.HasValue) { _emitLimit -= _receivedThisCall; } } catch (Exception e) { if (_retrievedSoFar == 0 || !_emitLimit.HasValue) { output = new CmdletOutput { ErrorResponse = e }; } else { break; } } ProcessOutput(output); } while (!_userControllingPaging && AutoIterationHelpers.HasValue(_nextToken) && (!_emitLimit.HasValue || _emitLimit.Value >= 1)); if (useParameterSelect) { WriteObject(cmdletContext.Select(null, this)); } return null; } #endif public ExecutorContext CreateContext() { return new CmdletContext(); } #endregion #region AWS Service Operation Call private Amazon.QLDB.Model.ListLedgersResponse CallAWSServiceOperation(IAmazonQLDB client, Amazon.QLDB.Model.ListLedgersRequest request) { Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "Amazon QLDB", "ListLedgers"); try { #if DESKTOP return client.ListLedgers(request); #elif CORECLR return client.ListLedgersAsync(request).GetAwaiter().GetResult(); #else #error "Unknown build edition" #endif } catch (AmazonServiceException exc) { var webException = exc.InnerException as System.Net.WebException; if (webException != null) { throw new Exception(Utils.Common.FormatNameResolutionFailureMessage(client.Config, webException.Message), webException); } throw; } } #endregion internal partial class CmdletContext : ExecutorContext { public int? MaxResult { get; set; } public System.String NextToken { get; set; } public System.Func<Amazon.QLDB.Model.ListLedgersResponse, GetQLDBLedgerListCmdlet, object> Select { get; set; } = (response, cmdlet) => response.Ledgers; } } }