Emits to existing s3 bucket
<properties>
<emitters>
<emitter class="org.apache.tika.pipes.emitter.s3.S3Emitter>
<params>
<!-- required -->
<param name="name" type="string">s3e</param>
<!-- required -->
<param name="region" type="string">us-east-1</param>
<!-- required -->
<param name="credentialsProvider"
type="string">(profile|instance)</param>
<!-- required if credentialsProvider=profile-->
<param name="profile" type="string">my-profile</param>
<!-- required -->
<param name="bucket" type="string">my-bucket</param>
<!-- optional; prefix to add to the path before emitting;
default is no prefix -->
<param name="prefix" type="string">my-prefix</param>
<!-- optional; default is 'json' this will be added to the SOURCE_PATH
if no emitter key is specified.