BlobOutput Interface

Definition

Place this on a parameter whose value would be written to a blob. The parameter type should be OutputBinding, where T could be one of:

  • Any native Java types such as int, String, byte[]
  • Any POJO type

The following example shows blob input and output bindings in a Java function. The function makes a copy of a text blob. The function is triggered by a queue message that contains the name of the blob to copy. The new blob is named {originalblobname}-Copy.

@FunctionName("copyTextBlob")
@StorageAccount("AzureWebJobsStorage")
@BlobOutput(name = "target", path = "samples-workitems/{queueTrigger}-Copy")
 public String blobCopy(
    @QueueTrigger(name = "filename",
                   queueName = "myqueue-items") String filename,
    @BlobInput(name = "source",
                path = "samples-workitems/{queueTrigger}") String content
 ) {
     return content;
 }
public interface BlobOutput implements Annotation
Implements
java.lang.annotation.Annotation

Methods

connection()

Defines the app setting name that contains the Azure Storage connection string.

dataType()

Defines how Functions runtime should treat the parameter value. Possible values are:

  • "" or string: treat it as a string whose value is serialized from the parameter
  • binary: treat it as a binary data whose value comes from for example OutputBinding<byte[]>
name()

The variable name used in function.json.

path()

Defines the path of the blob to which to write.

Applies to