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91 changes: 91 additions & 0 deletions
91
...st/kotlin/com/cultureamp/kafka/connect/plugins/transforms/RedShiftArrayTransformerTest.kt
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package com.cultureamp.kafka.connect.plugins.transforms | ||
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import com.mongodb.kafka.connect.source.MongoSourceConfig | ||
import com.mongodb.kafka.connect.source.json.formatter.JsonWriterSettingsProvider | ||
import com.mongodb.kafka.connect.source.schema.AvroSchema | ||
import com.mongodb.kafka.connect.source.schema.BsonValueToSchemaAndValue | ||
import com.mongodb.kafka.connect.util.ClassHelper | ||
import com.mongodb.kafka.connect.util.ConfigHelper | ||
import org.apache.kafka.connect.data.SchemaAndValue | ||
import org.apache.kafka.connect.source.SourceRecord | ||
import org.junit.Before | ||
import java.io.File | ||
import java.nio.file.Files | ||
import kotlin.test.Test | ||
import kotlin.test.assertTrue | ||
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/** | ||
* | ||
* A generic custom transform for RedShift | ||
* | ||
* This transformer class manipulates fields in schemas by turning them from arrays into strings | ||
* which is necessary for this: | ||
* https://stackoverflow.com/questions/61360342/kafka-connect-flatten-transformation-of-a-postgres-record-with-array-field issue to be solved | ||
* as RedShift does not support array types and arrays must be converted into strings. | ||
* See https://docs.confluent.io/platform/current/connect/javadocs/javadoc/org/apache/kafka/connect/transforms/Transformation.html. | ||
* | ||
* @param R is ConnectRecord<R>. | ||
* @constructor Creates a RedShiftArrayTransformer Transformation<R> for a given ConnectRecord<T> | ||
* | ||
*/ | ||
class RedShiftArrayTransformerTest { | ||
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private lateinit var transformer: RedShiftArrayTransformer<SourceRecord> | ||
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private fun hasNoArrays(obj: Any): Boolean { | ||
var hasArray = false | ||
obj::class.members.forEach { member -> | ||
when { | ||
member is Array<*> -> hasArray = true | ||
} | ||
} | ||
return hasArray | ||
} | ||
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@Before | ||
fun setUp() { | ||
transformer = RedShiftArrayTransformer() | ||
} | ||
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@Test | ||
fun `can transform ECST Employee data that has arrays into string fields`() { | ||
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val avroRecord = payload("com/cultureamp/employee-data.employees-v1.json") | ||
val sourceRecord = SourceRecord( | ||
null, | ||
null, | ||
"employee data ecst test", | ||
avroRecord.schema(), | ||
avroRecord.value() | ||
) | ||
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val transformedRecord = transformer.apply(sourceRecord) | ||
System.out.println(sourceRecord) | ||
System.out.println(transformedRecord) | ||
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assertTrue(hasNoArrays(transformedRecord)) | ||
} | ||
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private val sourceSchema = AvroSchema.fromJson(fileContent("com/cultureamp/employee-data.employees-value-v1.avsc")) | ||
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private fun payload(fileName: String): SchemaAndValue { | ||
val document = ConfigHelper.documentFromString(fileContent(fileName)).get() | ||
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return BsonValueToSchemaAndValue(jsonWriterSettings) | ||
.toSchemaAndValue(sourceSchema, document.toBsonDocument()) | ||
} | ||
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private fun fileContent(fileName: String): String { | ||
val url = this.javaClass.classLoader | ||
.getResource(fileName) ?: throw IllegalArgumentException("$fileName is not found 1") | ||
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return String(Files.readAllBytes(File(url.file).toPath())) | ||
} | ||
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private val jsonWriterSettings = | ||
ClassHelper.createInstance( | ||
MongoSourceConfig.OUTPUT_JSON_FORMATTER_CONFIG, | ||
"com.mongodb.kafka.connect.source.json.formatter.DefaultJson", | ||
JsonWriterSettingsProvider::class.java | ||
).jsonWriterSettings | ||
} |
60 changes: 60 additions & 0 deletions
60
src/test/resources/com/cultureamp/employee-data.employees-v1.json
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{ | ||
"id": "c63526f8-dec7-4ef8-96d8-18756076f064", | ||
"account_id": "0a05e2a3-7258-4cf5-a7f4-e21b08c030c5", | ||
"employee_id": "c63526f8-dec7-4ef8-96d8-18756076f064", | ||
"event_created_at": 1536899741117, | ||
"body": { | ||
"source": { | ||
"string": "" | ||
}, | ||
"employee_id": null, | ||
"email": { | ||
"string": "[email protected]" | ||
}, | ||
"name": { | ||
"string": "Test User 800702" | ||
}, | ||
"preferred_name": null, | ||
"birth_date": null, | ||
"start_date": { | ||
"string": "2017-02-24" | ||
}, | ||
"end_date": null, | ||
"locale": null, | ||
"observer": false, | ||
"gdpr_erasure_request_id": null, | ||
"manager_assignment": null, | ||
"erased": false, | ||
"created_at": 1536899741113, | ||
"updated_at": 1536899741117, | ||
"deleted_at": null | ||
}, | ||
"metadata": { | ||
"correlation_id": { | ||
"string": "b9098254-a1db-4114-9a39-baa17ab18fbf" | ||
}, | ||
"causation_id": null, | ||
"executor_id": { | ||
"string": "379907ca-632c-4e83-89c4-9dbe0e759ad3" | ||
}, | ||
"service": "Influx" | ||
}, | ||
"demographic_value_assignments": [ | ||
{ | ||
"demographic_id": { | ||
"string": "5c579970-684e-4911-a077-6bf407fb478d" | ||
}, | ||
"demographic_value_id": { | ||
"string": "427b936f-e932-4673-95a2-acd3e3b900b1" | ||
} | ||
}, | ||
{ | ||
"demographic_id": { | ||
"string": "460f6b2d-03c5-46cf-ba55-aa14477a12dc" | ||
}, | ||
"demographic_value_id": { | ||
"string": "ecc0db2e-486e-4f4a-a54a-db21673e1a2b" | ||
} | ||
} | ||
] | ||
} |
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