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Fusion 5.11
    Fusion 5.11

    Connector Datasources APIFusion Connectors APIs

    Use the Connector Datasources API to create and configure datasources and examine or clear items and tables from the crawl database.

    See Connectors and Indexing your Data for related information.

    Working with the crawl database

    Some of the 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 endpoints allow looking into the crawl database and dropping tables or clearing the database.

    The connectors that support the crawl database are currently lucid.fs and lucid.solrxml. 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.

    Examining a crawlDB

    The output from a GET request to /api/connectors/datasources/DATASOURCE_ID will include several sections detailing the database structure:

    • counters: The counters section reports the document counts of database activities, such as table inserts.

    • ops: The ops section reports on database operations that have occurred, such as initiating tables, retrieving items, processing items and table drops.

    • tables: The tables section lists the tables in the database with a count of the number of items in each table. Inspecting the items is described in the next section.

    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.

    Clear or delete items from a crawlDB

    A CLEAR request to /api/connectors/datasources/DATASOURCE_ID/db/items/<item> removes the information from the Solr Index only. This option is useful when Solr data gets out of sync with the Crawl Database.

    A DELETE request removes the information from the Crawl Database only. Note that this does not affect the Solr Index.

    Examples

    Get datasources assigned to the "demo" collection:

    REQUEST

    curl -u USERNAME:PASSWORD https://FUSION_HOST:FUSION_PORT/api/connectors/datasources?collection=demo

    RESPONSE

    [ {
      "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
      }
    } ]
    Create a datasource to index Solr-formatted XML files:

    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://FUSION_HOST:FUSION_PORT/api/connectors/datasources

    RESPONSE

    {
      "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
      }
    }
    Change the 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://FUSION_HOST:FUSION_PORT/api/connectors/datasources/SolrXML

    RESPONSE

    true
    Delete the datasource named 'database':

    REQUEST

    curl -u USERNAME:PASSWORD -X DELETE https://FUSION_HOST:FUSION_PORT/api/connectors/datasources/database

    RESPONSE

    If successful, no response.

    Clear a datasource

    You can use both of these APIs in order to fully clear the data:

    REQUEST

    curl -X POST 'http://FUSION_HOST:FUSION_PORT/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://FUSION_HOST:FUSION_PORT/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.

    The validate=true element in the create datasource command only validates the datasource. It does not automatically save the datasource. An example using this element is:

    The POST /datasources section of the API specification allows you to set the validate element for testing and use.