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Add fs2-aws-ciris with decode support for kinesis initial position (#375
) * Add fs2-aws-ciris with decode support for Either[InitialPositionInStream, Date] * bump many versions
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,40 @@ | ||
| package fs2.aws | ||
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| import java.util.Date | ||
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| import cats.implicits._ | ||
| import _root_.ciris.ConfigDecoder | ||
| import software.amazon.kinesis.common.InitialPositionInStream | ||
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| import scala.util.matching.Regex | ||
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| package object ciris { | ||
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| /** | ||
| * Ciris decoder support for Either[InitialPositionInStream, Date], useful when building [[fs2.aws.kinesis.KinesisConsumerSettings]] | ||
| * | ||
| * Usage: | ||
| * `env("FOOBAR").as[Either[InitialPositionInStream, Date]]` | ||
| * | ||
| * <ul> | ||
| * <li>`"TRIM_HORIZON"` becomes `Left(InitialPositionInStream.TRIM_HORIZON)` (consume from beginning)</li> | ||
| * <li>`"LATEST"` becomes `(Left[InitialPositionInStream.LATEST)` (consume from latest)</li> | ||
| * <li>`"TS_123456"` becomes `Right(Date(123456))` (consume from timestamp)</li> | ||
| * </ul> | ||
| * | ||
| */ | ||
| implicit def kinesisInitialPositionDecoder[T]( | ||
| implicit decoder: ConfigDecoder[T, String] | ||
| ): ConfigDecoder[T, Either[InitialPositionInStream, Date]] = { | ||
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| val DateRegex: Regex = """^TS_([0-9]+)$""".r | ||
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| decoder.mapOption(typeName = "InitialPositionInStream") { | ||
| case "TRIM_HORIZON" => Some(Left(InitialPositionInStream.TRIM_HORIZON)) | ||
| case "LATEST" => Some(Left(InitialPositionInStream.LATEST)) | ||
| case DateRegex(millis) => Some(Right(new Date(millis.toLong))) | ||
| case _ => None | ||
| } | ||
| } | ||
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| } |
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fs2-aws-ciris/src/test/scala/fs2/aws/ciris/CirisDecoderSpec.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| package fs2.aws.ciris; | ||
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| import java.util.Date | ||
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| import cats.effect.{ ContextShift, IO } | ||
| import ciris.{ ConfigException, ConfigValue } | ||
| import org.scalatest.Assertion | ||
| import org.scalatest.matchers.should.Matchers | ||
| import org.scalatest.wordspec.AnyWordSpec | ||
| import software.amazon.kinesis.common.InitialPositionInStream | ||
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| import scala.concurrent.ExecutionContext.Implicits.global; | ||
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| class CirisDecoderSpec extends AnyWordSpec with Matchers { | ||
| implicit val cs: ContextShift[IO] = IO.contextShift(global) | ||
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| "InitialPositionDecoderSpec" should { | ||
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| "when decoding Either[InitialPositionInStream, Date]" can { | ||
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| // same package, so `import fs2.aws.ciris._` not necessary here | ||
| def decode(testStr: String): Either[InitialPositionInStream, Date] = | ||
| ConfigValue | ||
| .default(testStr) | ||
| .as[Either[InitialPositionInStream, Date]] | ||
| .load[IO] | ||
| .unsafeRunSync() | ||
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| def expectDecodeFailure(testString: String): Assertion = | ||
| intercept[ConfigException] { | ||
| decode(testString) | ||
| }.getMessage should include( | ||
| s"Unable to convert value $testString to InitialPositionInStream" | ||
| ) | ||
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| "decode supported strings as initial offsets" in { | ||
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| decode("LATEST") should equal(Left(InitialPositionInStream.LATEST)) | ||
| decode("TRIM_HORIZON") should equal(Left(InitialPositionInStream.TRIM_HORIZON)) | ||
| decode("TS_1592404273000") should equal(Right(new Date(1592404273000L))) | ||
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| } | ||
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| "fail to decode valid strings" in { | ||
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| expectDecodeFailure("FOOBAR") | ||
| expectDecodeFailure("TS_FOO") | ||
| expectDecodeFailure("TS_") | ||
| expectDecodeFailure("_1592404273000") | ||
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| } | ||
| } | ||
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| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| sbt.version=1.3.10 | ||
| sbt.version=1.3.11 |