Description:
Elasticsearch get processor that uses the official Elastic REST client libraries to fetch a single document from Elasticsearch by _id. Note that the full body of the document will be read into memory before being written to a FlowFile for transfer.
Tags:
json, elasticsearch, elasticsearch5, elasticsearch6, elasticsearch7, elasticsearch8, put, index, record
Properties:
In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.
| Display Name | API Name | Default Value | Allowable Values | Description |
|---|
| Document Id | get-es-id | | | The _id of the document to retrieve.
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry) |
| Index | el-rest-fetch-index | | | The name of the index to use.
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry) |
| Type | el-rest-type | | | The type of this document (used by Elasticsearch for indexing and searching).
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry) |
| Destination | get-es-destination | FlowFile Content | - FlowFile Content
 - FlowFile Attribute
| Indicates whether the retrieved document is written to the FlowFile content or a FlowFile attribute. |
| Attribute Name | get-es-attribute-name | elasticsearch.doc | | The name of the FlowFile attribute to use for the retrieved document output.
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)
This Property is only considered if the [Destination] Property has a value of "FlowFile Attribute". |
| Client Service | el-rest-client-service | | Controller Service API:
ElasticSearchClientService
Implementation: ElasticSearchClientServiceImpl | An Elasticsearch client service to use for running queries. |
Dynamic Properties:
Supports Sensitive Dynamic Properties: No
Dynamic Properties allow the user to specify both the name and value of a property.
| Name | Value | Description |
|---|
| The name of a URL query parameter to add | The value of the URL query parameter | Adds the specified property name/value as a query parameter in the Elasticsearch URL used for processing.
Supports Expression Language: true (will be evaluated using flow file attributes and variable registry) |
Relationships:
| Name | Description |
|---|
| retry | All flowfiles that fail due to server/cluster availability go to this relationship. |
| document | Fetched documents are routed to this relationship. |
| not_found | A FlowFile is routed to this relationship if the specified document does not exist in the Elasticsearch cluster. |
| failure | All flowfiles that fail for reasons unrelated to server availability go to this relationship. |
Reads Attributes:
None specified.Writes Attributes:
| Name | Description |
|---|
| filename | The filename attribute is set to the document identifier |
| elasticsearch.index | The Elasticsearch index containing the document |
| elasticsearch.type | The Elasticsearch document type |
| elasticsearch.get.error | The error message provided by Elasticsearch if there is an error fetching the document. |
State management:
This component does not store state.Restricted:
This component is not restricted.Input requirement:
This component allows an incoming relationship.System Resource Considerations:
None specified.