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TableExtensions.cs
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TableExtensions.cs
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// *********************************************************************
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License
// *********************************************************************
using Microsoft.Azure.Cosmos.Table;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
namespace DataX.Utilities.Storage
{
/// <summary>
/// CosmosTable utility class
/// </summary>
public static class TableExtensions
{
public static async Task<T> ExecuteAndGetResultAsync<T>(this CloudTable table, TableOperation operation)
{
var result = (T)(await table.ExecuteAsync(operation).ContinueOnAnyContext()).Result;
return result;
}
public static async Task<IList<T>> ExecuteQueryAsync<T>(this CloudTable table, TableQuery<T> query, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
var items = new List<T>();
TableContinuationToken token = null;
do
{
TableQuerySegment<T> seg = await table.ExecuteQuerySegmentedAsync<T>(query, token).ContinueOnAnyContext();
token = seg.ContinuationToken;
items.AddRange(seg);
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || items.Count < query.TakeCount.Value));
return items;
}
public static async Task ForEachQueryResultAsync<T>(this CloudTable table, TableQuery<T> query, Action<T> processResult, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
TableContinuationToken token = null;
int count = 0;
do
{
TableQuerySegment<T> seg = await table.ExecuteQuerySegmentedAsync<T>(query, token).ContinueOnAnyContext();
token = seg.ContinuationToken;
foreach (var result in seg)
{
processResult(result);
count++;
}
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || count < query.TakeCount.Value));
}
public static async Task ForEachQueryResultAsync<T>(this CloudTable table, TableQuery<T> query, Func<T, Task> processResultAsync, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
TableContinuationToken token = null;
int count = 0;
do
{
TableQuerySegment<T> seg = await table.ExecuteQuerySegmentedAsync<T>(query, token).ContinueOnAnyContext();
token = seg.ContinuationToken;
foreach (var result in seg)
{
await processResultAsync(result).ContinueOnAnyContext();
count++;
}
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || count < query.TakeCount.Value));
}
public static async Task<TableContinuationToken> ForEachQueryResultAsync<T>(this CloudTable table, TableQuery<T> query, TableContinuationToken token, Func<T, Task> processResultAsync, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
int count = 0;
do
{
TableQuerySegment<T> seg = await table.ExecuteQuerySegmentedAsync<T>(query, token).ContinueOnAnyContext();
token = seg.ContinuationToken;
foreach (var result in seg)
{
await processResultAsync(result).ContinueOnAnyContext();
count++;
}
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || count < query.TakeCount.Value));
return token;
}
public static async Task<IList<T>> ExecuteQueryAsync<T>(this TableQuery<T> query, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
var items = new List<T>();
TableContinuationToken token = null;
do
{
TableQuerySegment<T> seg = await query.ExecuteSegmentedAsync(token).ContinueOnAnyContext();
token = seg.ContinuationToken;
items.AddRange(seg);
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || items.Count < query.TakeCount.Value));
return items;
}
/// <summary>
/// Executes a table query and processes the results as they arrive
/// </summary>
public static async Task ForEachQueryResultAsync<T>(this TableQuery<T> query, Func<T, Task> processResultAsync, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
TableContinuationToken token = null;
int count = 0;
do
{
TableQuerySegment<T> seg = await query.ExecuteSegmentedAsync(token).ContinueOnAnyContext();
token = seg.ContinuationToken;
foreach (var result in seg)
{
await processResultAsync(result).ContinueOnAnyContext();
count++;
}
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || count < query.TakeCount.Value));
}
/// <summary>
/// Executes a table query and processes the results as they arrive
/// </summary>
public static async Task ForEachQueryResultAsync<T>(this TableQuery<T> query, Func<T, Task<bool>> processResultAsync, CancellationToken ct = default(CancellationToken)) where T : ITableEntity, new()
{
TableContinuationToken token = null;
int count = 0;
do
{
TableQuerySegment<T> seg = await query.ExecuteSegmentedAsync(token).ContinueOnAnyContext();
token = seg.ContinuationToken;
foreach (var result in seg)
{
if (!await processResultAsync(result).ContinueOnAnyContext())
{
break;
}
count++;
}
} while (token != null && !ct.IsCancellationRequested && (query.TakeCount == null || count < query.TakeCount.Value));
}
public static async Task<T> InsertAsync<T>(this CloudTable table, T entity) where T : TableEntity
{
return (T)(await table.ExecuteAsync(TableOperation.Insert(entity)).ContinueOnAnyContext()).Result;
}
public static async Task<T> InsertOrReplace<T>(this CloudTable table, T entity) where T : TableEntity
{
return (T)(await table.ExecuteAsync(TableOperation.InsertOrReplace(entity)).ContinueOnAnyContext()).Result;
}
public static Task DeleteAsync(this CloudTable table, TableEntity entity)
{
return table.ExecuteAsync(TableOperation.Delete(entity));
}
public static async Task<T> ReplaceAsync<T>(this CloudTable table, T entity) where T : TableEntity
{
return (T)(await table.ExecuteAsync(TableOperation.Replace(entity)).ContinueOnAnyContext()).Result;
}
}
}