Connector Datasources APIManaged Fusion Connectors APIs
Use the Connector Datasources API to create and configure datasources and examine or clear items and tables from the crawl database.
For more information, view the API specification.
See Lucidworks Connectors and Datasources for related information.
Working with the crawl database
Some connectors use a crawl database to track documents that have been seen by prior crawls and are able to use this information to understand which documents are new or have been updated or removed and take appropriate action in the index. The /api/connectors/datasources/DATASOURCE_ID/db endpoints allow dropping tables or clearing the database.
All V2 connectors support the crawl database as well as some V1 conenctors, like the Lucid.fs connector. The Lucid.anda connector also uses a crawl database, but it is not the same database, and does not have a REST API or other interface to access it.
Drop tables from a crawlDB
The output from a DELETE request to /api/connectors/datasources/DATASOURCE_ID/db/<table> will be empty. When dropping the database, note that no documents will be removed from the index. However, the crawl database will be empty, so on the next datasource run, all documents will be treated as though they were never seen by the connectors.
When dropping tables, be aware that the items table does not delete documents from the index, but instead changes the database so database considers them new documents. When dropping other tables, such as the errors table, it will merely clear out old error messages.
Delete items from a crawlDB
A DELETE request to /api/connectors/datasources/DATASOURCE_ID/db removes the information from the Crawl Database only. Note that this does not affect the Solr Index.
Examples
REQUEST
curl -u USERNAME:PASSWORD https://EXAMPLE_COMPANY.b.lucidworks.cloud/api/connectors/datasources?collection=demoRESPONSE
[ {
"id" : "database",
"created" : "2014-05-04T19:47:22.867Z",
"modified" : "2014-05-04T19:47:22.867Z",
"connector" : "lucid.jdbc",
"type" : "jdbc",
"description" : null,
"pipeline" : "conn_solr",
"properties" : {
"db" : null,
"commit_on_finish" : true,
"verify_access" : true,
"sql_select_statement" : "select CONTENTID as id from CONTENT;",
"debug" : false,
"collection" : "demo",
"password" : "password",
"url" : "jdbc:postgresql://FUSION_HOST:5432/db",
"nested_queries" : null,
"clean_in_full_import_mode" : true,
"username" : "user",
"delta_sql_query" : null,
"commit_within" : 900000,
"primary_key" : null,
"driver" : "org.postgresql.Driver",
"max_docs" : -1
}
} ]REQUEST
curl -u USERNAME:PASSWORD -X POST -H 'Content-type: application/json' -d '{
"id":"SolrXML",
"connector":"lucid.solrxml",
"type":"solrxml",
"properties":{
"path":"/Applications/solr-4.10.2/example/exampledocs", "generate_unique_key":false, "collection":"MyCollection"
}
}' https://EXAMPLE_COMPANY.b.lucidworks.cloud/api/connectors/datasourcesRESPONSE
{
"id" : "SolrXML",
"created" : "2015-05-18T15:47:51.199Z",
"modified" : "2015-05-18T15:47:51.199Z",
"connector" : "lucid.solrxml",
"type" : "solrxml",
"properties" : {
"commit_on_finish" : true,
"verify_access" : true,
"generate_unique_key" : false,
"collection" : "MyCollection",
"include_datasource_metadata" : true,
"include_paths" : [ ".*\\.xml" ],
"initial_mapping" : {
"id" : "a35c9ff3-dbb6-434b-af40-597722c2986a",
"skip" : false,
"label" : "field-mapping",
"type" : "field-mapping"
},
"path" : "/Applications/apache-repos/solr-4.10.2/example/exampledocs",
"exclude_paths" : [ ],
"url" : "file:/Applications/apache-repos/solr-4.10.2/example/exampledocs/",
"max_docs" : -1
}
}max_docs value for the above datasource:REQUEST
curl -u USERNAME:PASSWORD -X PUT -H 'Content-type: application/json' -d '{
"id":"SolrXML",
"connector":"lucid.solrxml",
"type":"solrxml",
"properties":{
"path":"/Applications/solr-4.10.2/example/exampledocs",
"max_docs":10
}
}' https://EXAMPLE_COMPANY.b.lucidworks.cloud/api/connectors/datasources/SolrXMLRESPONSE
true
REQUEST
curl -u USERNAME:PASSWORD -X DELETE https://EXAMPLE_COMPANY.b.lucidworks.cloud/api/connectors/datasources/databaseRESPONSE
If successful, no response.
You can use both of these APIs in order to fully clear the data:
REQUEST
curl -X POST 'http://EXAMPLE_COMPANY.b.lucidworks.cloud/api/solr/COLLECTION_NAME/update?commit=true' -H 'Content-Type: application/json' --data-binary '{"delete":{"query":"_lw_data_source_s:DATASOURCENAME"}}'
`curl -X DELETE -u USERNAME:PASSWORD 'http://EXAMPLE_COMPANY.b.lucidworks.cloud/api/connectors/datasources/DATASOURCENAME/db' `The first clears the data from the datasource but does not clear the crawlDB. So if you attempt to index the same document set again, indexing will skip the documents because they are still in the crawl DB. If you send the command to delete the crawlDB afterward, you can then reload the docs.
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