# Incremental Scanner Example

The sample Attivio project contains the `com.sample.module.SampleIncrementalDataSourceScanner` sample scanner. As in the `com.sample.module.SampleDataSourceScanner` sample scanner, the scanner can be tested standalone from the `SampleIncrementalDataSourceScannerTest` Junit test and from the connectors admin page.

The incremental sample scanner demonstrates the following SDK capabilities.

| Capability                                                  | Notes                                                                                                               |
| ----------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- |
| Feeding only new and modified documents:                    | Observe the `shouldFeedThisDoc` method `IngestionHistoryApi` calls.                                                 |
| Deleting obsolete documents                                 | Observe the `deleteObsoleteDocuments` method.                                                                       |
| Securing the documents                                      | Observe the `createACL` method.                                                                                     |
| Creating document meta data in addition to content          | Observe the `addMetadata` method.                                                                                   |
| Storing content in the content store                        | Observe the calling to the `DocumentPublisher.put` method.                                                          |
| Committing documents in the index explicitly by the scanner | Observe the `IndexCommitter.commit` call.                                                                           |
| Using annotations to create menus                           | Observe the `@ConfigurationOptionInfo.Group` annotations.                                                           |
| Using annotations to display and describe the scanner       | Observe the `@ConfigurationOptionInfo` annotation.                                                                  |
| Using annotations to display and describe each option       | Observe the `@ConfigurationOption` annotation with the `displayName`, `description` and `formEntryClass` arguments. |


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