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Batches: How to send multiple commands using a batch?

To send multiple operations in a single request, reducing the number of remote calls and allowing several operations to share same transaction, Batch should be used.

Syntax

BatchResult[] Batch(IEnumerable<ICommandData> commandDatas);

Parameters
An array of following commands:
- PutCommandData
- DeleteCommandData
- PatchCommandData
- ScriptedPatchCommandData
ICommandData Commands to process.
Return Value
BatchResult[] An array of batch results matching exactly the order of commands send.

Example

BatchResult[] results = store
	.DatabaseCommands
	.Batch(new ICommandData[]
		       {
			       new PutCommandData
				       {
					       Key = "products/999",
						   Document = RavenJObject.FromObject(new Product
							{
								Name = "My Product",
								Supplier = "suppliers/999"
							}),
							Metadata = new RavenJObject()
				       }, 
				   new PutCommandData
					   {
							Key = "suppliers/999",
							Document = RavenJObject.FromObject(new Supplier
							{
								Name = "My Supplier",
							}),
							Metadata = new RavenJObject()
					   }, 
				   new DeleteCommandData
					   {
							Key = "products/2"
					   }
		       });

Concurrency

If an ETag is specified in the command, that ETag is compared to the current ETag on the document on the server. If the ETag does not match, a 409 Conflict status code will be returned from the server, causing a ConcurrencyException to be thrown. In such a case, the entire operation fails and non of the updates that were attempted will succeed.

Transactions

All the operations in the batch will succeed or fail as a transaction. Other users will not be able to see any of the changes until the entire batch completes.