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namespaceNET.DocumentDb.Repository
{
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Collections.ObjectModel;
usingSystem.Linq.Expressions;
usingSystem.Threading.Tasks;
namespaceAzure.Documents.Db
{
usingSystem.Configuration;
usingSystem.Linq;
usingMicrosoft.Azure.Documents;
usingMicrosoft.Azure.Documents.Client;
usingMicrosoft.Azure.Documents.Linq;
publicclassDocumentDbRepository
{
publicDocumentDbRepository(stringcollection)
{
this.CollectionId=collection;
}
publicIEnumerable<T>GetItems<T>(Expression<Func<T,bool>>predicate)
{
returnthis.Client.CreateDocumentQuery<T>(this.Collection.DocumentsLink,newFeedOptions{EnableScanInQuery=true})
.Where(predicate)
.AsEnumerable();
}
publicIEnumerable<T>GetItems<T>(Expression<Func<T,bool>>predicate,FeedOptionsoptions)
{
returnthis.Client.CreateDocumentQuery<T>(this.Collection.DocumentsLink,options)
.Where(predicate)
.AsEnumerable();
}
/// <summary>
/// Get items by string expression query
/// </summary>
/// <typeparam name="T">Entity type to retorn</typeparam>
/// <param name="expression">Query expression to get entities result</param>
/// <returns>Entities returned by query expression</returns>
publicIEnumerable<T>GetItems<T>(stringexpression)
{
returnthis.Client.CreateDocumentQuery<T>(this.Collection.DocumentsLink,expression).AsEnumerable();
}
/// <summary>
/// Get item by string expression query
/// </summary>
/// <typeparam name="T">Entity type to retorn</typeparam>
/// <param name="expression">Query expression to get first or default entity</param>
/// <returns>Entity returned by query expression</returns>
publicTGetItem<T>(stringexpression)
{
returnthis.Client.CreateDocumentQuery<T>(this.Collection.DocumentsLink,expression)
.AsEnumerable()
.FirstOrDefault();
}
publicTGetItem<T>(Expression<Func<T,bool>>predicate)
{
returnthis.Client.CreateDocumentQuery<T>(this.Collection.DocumentsLink)
.Where(predicate)
.AsEnumerable()
.FirstOrDefault();
}
publicasyncTaskCreateItemAsync<T>(Titem)
{
awaitthis.Client.CreateDocumentAsync(this.Collection.SelfLink,item);
}
publicasyncTaskUpdateItemAsync<T>(stringid,Titem)
{
vardoc=this.GetDocument(id);
awaitthis.Client.ReplaceDocumentAsync(doc.SelfLink,item);
}
//Use the Database if it exists, if not create a new Database
privateDatabaseReadOrCreateDatabase()
{
vardb=this.Client.CreateDatabaseQuery()
.Where(d =>d.Id==this.DatabaseId)
.AsEnumerable()
.FirstOrDefault()??this.Client.CreateDatabaseAsync(newDatabase{Id=this.DatabaseId}).Result;
returndb;
}
privateDocumentGetDocument(stringid)
{
returnthis.Client.CreateDocumentQuery(this.Collection.DocumentsLink)
.Where(d =>d.Id==id)
.AsEnumerable()
.FirstOrDefault();
}
//Use the DocumentCollection if it exists, if not create a new Collection
privateDocumentCollectionReadOrCreateCollection(stringdatabaseLink)
{
varcol=this.Client.CreateDocumentCollectionQuery(databaseLink)
.Where(c =>c.Id==this.CollectionId)
.AsEnumerable()
.FirstOrDefault();
if(col!=null)
{
returncol;
}
varcollectionSpec=newDocumentCollection{Id=this.CollectionId};
varrequestOptions=newRequestOptions{OfferType="S1"};
col=this.Client.CreateDocumentCollectionAsync(databaseLink,collectionSpec,requestOptions).Result;
col.IndexingPolicy.IncludedPaths.Add(
newIncludedPath
{
Path="/*",
Indexes=newCollection<Index>
{
newRangeIndex(DataType.Number){Precision=7}
}
});
returncol;
}
//Expose the "database" value from configuration as a property for internal use
privatestringdatabaseId;
privatestringDatabaseId
{
get
{
if(string.IsNullOrEmpty(this.databaseId))
{
this.databaseId=ConfigurationManager.AppSettings["database"];
}
returnthis.databaseId;
}
}
//Expose the "collection" value from configuration as a property for internal use
privatestringCollectionId{get;}
//Use the ReadOrCreateDatabase function to get a reference to the database.
privateDatabasedatabase;
privateDatabaseDatabase=>this.database??(this.database=this.ReadOrCreateDatabase());
//Use the ReadOrCreateCollection function to get a reference to the collection.
privateDocumentCollectioncollection;
privateDocumentCollectionCollection=>this.collection??(this.collection=this.ReadOrCreateCollection(this.Database.SelfLink));
//This property establishes a new connection to DocumentDB the first time it is used,
//and then reuses this instance for the duration of the application avoiding the
//overhead of instantiating a new instance of DocumentClient with each request
privateDocumentClientclient;
privateDocumentClientClient
{
get
{
if(this.client!=null)
{
returnthis.client;
}
varendpoint=ConfigurationManager.AppSettings["endpoint"];
varauthKey=ConfigurationManager.AppSettings["authKey"];
varendpointUri=newUri(endpoint);
this.client=newDocumentClient(endpointUri,authKey);
returnthis.client;
}
}
}
}
}