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RESO Replication Client

The RESO Replication Client can be used to fetch data from a given URL using a number of different replication strategies and supports OAuth 2 bearer tokens and client credentials.

View Help

Use the following command to view help info:

$ reso-certification-utils replicate --help
Usage: RESO Certification Utils replicate [options]

Replicates data from a given resource with expansions

Options:
  -s, --strategy <string>                  One of TopAndSkip, TimestampAsc, TimestampDesc, or NextLink
  -u, --serviceRootUri <string>            OData service root URI (no resource name or query)
  -b, --bearerToken <string>               Bearer token to use for authorization
  -i, --clientId <string>                  OAuth2 client_id parameter, use this OR bearerToken
  -c, --clientSecret <string>              OAuth2 client_secret parameter, use this OR bearerToken
  -k, --tokenUri <string>                  OAuth2 token_uri parameter, use this OR bearerToken
  -e, --scope <string>                     Optional OAuth2 scopes for client credentials
  -p, --pathToMetadataReportJson <string>  Path to metadata report JSON
  -r, --resourceName <string>              Resource name to replicate data from
  -x, --expansions <items>                 Comma-separated list of items to expand during the query process, e.g. Media,OpenHouse
  -f, --filter <string>                    OData $filter expression
  -t, --top <number>                       Optional parameter to use for OData $top
  -m, --maxPageSize <number>               Optional parameter for the odata.maxpagesize header (default: 100)
  -o, --outputPath <string>                Name of directory for results
  -l, --limit <number>                     Limit total number of records at client level
  -v, --version <string>                   Data Dictionary version to use (default: "2.0")
  -j, --jsonSchemaValidation               Use JSON schema validation
  -N, --originatingSystemName <string>     Used when additional filters are needed for OriginatingSystemName
  -I, --originatingSystemId <string>       Used when additional filters are needed for OriginatingSystemID
  -S, --strictMode <boolean>               Fail immediately on schema validation errors if strict mode is true (default: true)
  -h, --help                               display help for command

Example: Replicate Data from a URL Using TopAndSkip

Replicating from https://some.api.com/Property can be done as follows:

$ reso-certification-utils replicate -s TopAndSkip -u https://some.api.com/Property -b <your test token>

Example: Replicate Data from the Property Resource Using NextLink with a Media and OpenHouse Expansion

Replicating from https://some.api.com/Property can be done as follows:

$ reso-certification-utils replicate -s NextLink -u https://some.api.com/Property -b <your test token> -x Media,OpenHouse

You can also use the expand query directly, without the -x option. In that case, the dollar sign in $expand needs to be escaped.

$ reso-certification-utils replicate -s NextLink -u https://some.api.com/Property?\$expand=Media,OpenHouse -b <your test token>

Note the \ before the $expand. Shells sometimes require escape sequences for special characters like $.

RESO Certification

RESO uses the replicate option for Data Dictionary testing, which consists of four parts:

  • Metadata Validation - Validates XML and OData metadata and produces a metadata-report.json file. See RESO Commander
  • Variations Check - Finds suggested mappings for resource, fields, and lookups using automated matching techniques and human suggestions
  • Data Sampling - Ensures that RESO Web API providers are following the specification and that data can be sampled using the standard
  • Data Validation - All sampled data are validated against JSON Schema generated from their metadata

For more information about RESO Certification, see the README.

The replicate utility performs the latter two of the above steps.

Replicate Data from a RESO Server

To test replication using DD 2.0 and NextLink behavior, use the following command:

$ reso-certification-utils replicate -s NextLink -u https://yourapi.com/serviceRoot -c <clientId> -i <clientSecret> -k <tokenUri> -e api -l 100000 -p <your-metadata-report.json> -t 100 -f "OriginatingSystemName eq '<your originating system name>'" -v 2.0

In DD 1.7, ModificationTimestamp queries were used for testing instead. For example:

$ reso-certification-utils replicate -s TimestampDesc -u https://yourapi.com/serviceRoot -c <clientId> -i <clientSecret> -k <tokenUri> -e api -l 100000 -p <your-metadata-report.json> -t 100 -f "OriginatingSystemName eq '<your originating system name>'" -v 1.7

The examples above show the use of the OriginatingSystemName filter.

The also assume that the user will have access to the metadata-report.json or metadata-report.processed.json files in order to inform the replication client of the resources and expansions to query.

Replicate Data from a RESO Server with JSON Schema Validation

Once replication is working correctly using the commands above, the next step is to add schema validation.

$ reso-certification-utils replicate -s TimestampDesc -u https://yourapi.com/serviceRoot -c <clientId> -i <clientSecret> -k <tokenUri> -e api -l 100000 -p <your-metadata-report.json> -t 100 -f "OriginatingSystemName eq '<your originating system name>'" -v 1.7 -j true

In this case, -j tells the program to use JSON Schema Validation an -S sets strict mode, which will exit on first error. Since the number of JSON Schema validation errors can be potentially large, strict mode is enabled by default.

Reports and Errors

If there are errors during sampling they will be displayed on the screen if running as a command-line utility.

If reports are being saved, they will be saved to the root of the directory. For example, JSON Schema Validation errors will be saved to data-availability-schema-validation.errors and data availability reports will be saved to data-availability-report.json.



Questions? Contact [email protected]