io.cdap.wrangler.datamodel

Class HTTPSchemaLoader

java.lang.Object

io.cdap.wrangler.datamodel.HTTPSchemaLoader

All Implemented Interfaces:

AvroSchemaLoader

public final class HTTPSchemaLoader
extends Object
implements AvroSchemaLoader

The HTTPSchemaLoader object loads an AVRO data model schema at a given url.

Constructor Summary

Constructors

Constructor and Description
HTTPSchemaLoader(String baseUrl, String manifestName)

Method Summary

Modifier and Type	Method and Description
org.apache.commons.collections4.SetValuedMap<String,org.apache.avro.Schema>	load() Loads the data models located at the url.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HTTPSchemaLoader

public HTTPSchemaLoader(String baseUrl,
                        String manifestName)

Method Detail

load

public org.apache.commons.collections4.SetValuedMap<String,org.apache.avro.Schema> load()
                                                                                 throws IOException

Loads the data models located at the url. All available data models should be listed within a manifest.json file found at the root of the url. The manifest.json should have the schema of Manifest. If the loader is unable to download the manifest or referenced data models, the load will throw an exception. Below is an example manifest file. { "standards": { "OMOP_6_0_0": { "format": "avsc" } } }

Specified by:

load in interface AvroSchemaLoader

Returns:

a map with keys representing the name of the schema. The value is a set of all of the revisions of the schema.

Throws:

IOException - when the manifest is missing or a parsing error.