bulk-cdk: improve AirbyteConnectorRunner and CliRunner

airbyte-cdk/bulk/core/base/src/main/kotlin/io/airbyte/cdk/AirbyteConnectorRunner.kt

@@ -5,6 +5,7 @@ import io.airbyte.cdk.command.ConnectorCommandLinePropertySource
 import io.airbyte.cdk.command.MetadataYamlPropertySource
 import io.micronaut.configuration.picocli.MicronautFactory
 import io.micronaut.context.ApplicationContext
+import io.micronaut.context.RuntimeBeanDefinition
 import io.micronaut.context.env.CommandLinePropertySource
 import io.micronaut.context.env.Environment
 import io.micronaut.core.cli.CommandLine as MicronautCommandLine
@@ -17,8 +18,11 @@ import picocli.CommandLine.Model.UsageMessageSpec
 
 /** Source connector entry point. */
 class AirbyteSourceRunner(
+    /** CLI args. */
     args: Array<out String>,
-) : AirbyteConnectorRunner("source", args) {
+    /** Micronaut bean definition overrides, used only for tests. */
+    vararg testBeanDefinitions: RuntimeBeanDefinition<*>,
+) : AirbyteConnectorRunner("source", args, testBeanDefinitions) {
     companion object {
         @JvmStatic
         fun run(vararg args: String) {
@@ -29,8 +33,11 @@ class AirbyteSourceRunner(
 
 /** Destination connector entry point. */
 class AirbyteDestinationRunner(
+    /** CLI args. */
     args: Array<out String>,
-) : AirbyteConnectorRunner("destination", args) {
+    /** Micronaut bean definition overrides, used only for tests. */
+    vararg testBeanDefinitions: RuntimeBeanDefinition<*>,
+) : AirbyteConnectorRunner("destination", args, testBeanDefinitions) {
     companion object {
         @JvmStatic
         fun run(vararg args: String) {
@@ -46,6 +53,7 @@ class AirbyteDestinationRunner(
 sealed class AirbyteConnectorRunner(
     val connectorType: String,
     val args: Array<out String>,
+    val testBeanDefinitions: Array<out RuntimeBeanDefinition<*>>,
 ) {
     val envs: Array<String> = arrayOf(Environment.CLI, connectorType)
 
@@ -65,11 +73,12 @@ sealed class AirbyteConnectorRunner(
                     commandLinePropertySource,
                     MetadataYamlPropertySource(),
                 )
+                .beanDefinitions(*testBeanDefinitions)
                 .start()
         val isTest: Boolean = ctx.environment.activeNames.contains(Environment.TEST)
         val picocliFactory: CommandLine.IFactory = MicronautFactory(ctx)
         val picocliCommandLine: CommandLine =
-            picocliCommandLineFactory.build<AirbyteConnectorRunnable>(picocliFactory, isTest)
+            picocliCommandLineFactory.build<AirbyteConnectorRunnable>(picocliFactory)
         val exitCode: Int = picocliCommandLine.execute(*args)
         if (!isTest) {
             // Required by the platform, otherwise syncs may hang.
@@ -82,10 +91,7 @@ sealed class AirbyteConnectorRunner(
 class PicocliCommandLineFactory(
     val runner: AirbyteConnectorRunner,
 ) {
-    inline fun <reified R : Runnable> build(
-        factory: CommandLine.IFactory,
-        isTest: Boolean,
-    ): CommandLine {
+    inline fun <reified R : Runnable> build(factory: CommandLine.IFactory): CommandLine {
         val commandSpec: CommandLine.Model.CommandSpec =
             CommandLine.Model.CommandSpec.wrapWithoutInspection(R::class.java, factory)
                 .name("airbyte-${runner.connectorType}-connector")
@@ -95,10 +101,6 @@ class PicocliCommandLineFactory(
                 .addOption(config)
                 .addOption(catalog)
                 .addOption(state)
-
-        if (isTest) {
-            commandSpec.addOption(output)
-        }
         return CommandLine(commandSpec, factory)
     }
 
@@ -168,10 +170,4 @@ class PicocliCommandLineFactory(
             "path to the json-encoded state file",
             "Required by the following commands: read",
         )
-    val output: OptionSpec =
-        fileOption(
-            "output",
-            "path to the output file",
-            "When present, the connector writes to this file instead of stdout",
-        )
 }

airbyte-cdk/bulk/core/base/src/main/kotlin/io/airbyte/cdk/command/ConnectorCommandLinePropertySource.kt

@@ -23,7 +23,6 @@ class ConnectorCommandLinePropertySource(
 const val CONNECTOR_CONFIG_PREFIX: String = "airbyte.connector.config"
 const val CONNECTOR_CATALOG_PREFIX: String = "airbyte.connector.catalog"
 const val CONNECTOR_STATE_PREFIX: String = "airbyte.connector.state"
-const val CONNECTOR_OUTPUT_FILE = "airbyte.connector.output.file"
 
 private fun resolveValues(
     commandLine: CommandLine,
@@ -39,7 +38,6 @@ private fun resolveValues(
     }
     val values: MutableMap<String, Any> = mutableMapOf()
     values[Operation.PROPERTY] = ops.first()
-    commandLine.optionValue("output")?.let { values[CONNECTOR_OUTPUT_FILE] = it }
     for ((cliOptionKey, prefix) in
         mapOf(
             "config" to CONNECTOR_CONFIG_PREFIX,

airbyte-cdk/bulk/core/base/src/main/kotlin/io/airbyte/cdk/output/OutputConsumer.kt

@@ -25,9 +25,7 @@ import io.micronaut.context.annotation.Value
 import io.micronaut.context.env.Environment
 import jakarta.inject.Singleton
 import java.io.ByteArrayOutputStream
-import java.io.FileOutputStream
 import java.io.PrintStream
-import java.nio.file.Path
 import java.time.Clock
 import java.time.Instant
 import java.util.concurrent.ConcurrentHashMap
@@ -104,9 +102,6 @@ interface OutputConsumer : Consumer<AirbyteMessage>, AutoCloseable {
 /** Configuration properties prefix for [StdoutOutputConsumer]. */
 const val CONNECTOR_OUTPUT_PREFIX = "airbyte.connector.output"
 
-// Used for integration tests.
-const val CONNECTOR_OUTPUT_FILE = "$CONNECTOR_OUTPUT_PREFIX.file"
-
 /** Default implementation of [OutputConsumer]. */
 @Singleton
 @Secondary
@@ -293,10 +288,4 @@ private class RecordTemplate(
 private class PrintStreamFactory {
 
     @Singleton @Requires(notEnv = [Environment.TEST]) fun stdout(): PrintStream = System.out
-
-    @Singleton
-    @Requires(env = [Environment.TEST])
-    @Requires(property = CONNECTOR_OUTPUT_FILE)
-    fun file(@Value("\${$CONNECTOR_OUTPUT_FILE}") filePath: Path): PrintStream =
-        PrintStream(FileOutputStream(filePath.toFile()), false, Charsets.UTF_8)
 }

airbyte-cdk/bulk/core/base/src/testFixtures/kotlin/io/airbyte/cdk/command/CliRunner.kt

@@ -11,8 +11,15 @@ import io.airbyte.cdk.util.Jsons
 import io.airbyte.protocol.models.v0.AirbyteMessage
 import io.airbyte.protocol.models.v0.AirbyteStateMessage
 import io.airbyte.protocol.models.v0.ConfiguredAirbyteCatalog
+import io.micronaut.context.RuntimeBeanDefinition
+import java.io.ByteArrayInputStream
+import java.io.ByteArrayOutputStream
+import java.io.InputStream
+import java.io.OutputStream
+import java.io.PrintStream
 import java.nio.file.Files
 import java.nio.file.Path
+import java.time.Clock
 import kotlin.io.path.deleteIfExists
 
 data object CliRunner {
@@ -33,54 +40,73 @@ data object CliRunner {
         config: ConfigurationJsonObjectBase? = null,
         catalog: ConfiguredAirbyteCatalog? = null,
         state: List<AirbyteStateMessage>? = null,
-    ): BufferingOutputConsumer =
+    ): BufferingOutputConsumer {
+        val out = TestOutputStream()
         runConnector(op, config, catalog, state) { args: Array<String> ->
-            AirbyteSourceRunner(args)
+            AirbyteSourceRunner(args, out.beanDefinition)
         }
+        return out.results
+    }
 
     /** Same as [runSource] but for destinations. */
     fun runDestination(
         op: String,
         config: ConfigurationJsonObjectBase? = null,
         catalog: ConfiguredAirbyteCatalog? = null,
         state: List<AirbyteStateMessage>? = null,
-    ): BufferingOutputConsumer =
+        inputStream: InputStream,
+    ): BufferingOutputConsumer {
+        val inputBeanDefinition: RuntimeBeanDefinition<InputStream> =
+            RuntimeBeanDefinition.builder(InputStream::class.java) { inputStream }
+                .singleton(true)
+                .build()
+        val out = TestOutputStream()
         runConnector(op, config, catalog, state) { args: Array<String> ->
-            AirbyteDestinationRunner(args)
+            AirbyteDestinationRunner(args, inputBeanDefinition, out.beanDefinition)
+        }
+        return out.results
+    }
+
+    /** Same as the other [runDestination] but with simpler input of [AirbyteMessage] instances. */
+    fun runDestination(
+        op: String,
+        config: ConfigurationJsonObjectBase? = null,
+        catalog: ConfiguredAirbyteCatalog? = null,
+        state: List<AirbyteStateMessage>? = null,
+        vararg input: AirbyteMessage,
+    ): BufferingOutputConsumer {
+        val baos = ByteArrayOutputStream()
+        for (msg in input) {
+            Jsons.writeValue(baos, msg)
+            baos.write('\n'.code)
         }
+        val inputStream = ByteArrayInputStream(baos.toByteArray())
+        return runDestination(op, config, catalog, state, inputStream)
+    }
 
     private fun runConnector(
         op: String,
         config: ConfigurationJsonObjectBase?,
         catalog: ConfiguredAirbyteCatalog?,
         state: List<AirbyteStateMessage>?,
         connectorRunnerConstructor: (Array<String>) -> AirbyteConnectorRunner,
-    ): BufferingOutputConsumer {
-        val result = BufferingOutputConsumer(ClockFactory().fixed())
+    ) {
         val configFile: Path? = inputFile(config)
         val catalogFile: Path? = inputFile(catalog)
         val stateFile: Path? = inputFile(state)
-        val outputFile: Path = Files.createTempFile(null, null)
         val args: List<String> =
             listOfNotNull(
                 "--$op",
                 configFile?.let { "--config=$it" },
                 catalogFile?.let { "--catalog=$it" },
                 stateFile?.let { "--state=$it" },
-                "--output=$outputFile",
             )
         try {
             connectorRunnerConstructor(args.toTypedArray()).run<AirbyteConnectorRunnable>()
-            Files.readAllLines(outputFile)
-                .filter { it.isNotBlank() }
-                .map { Jsons.readValue(it, AirbyteMessage::class.java) }
-                .forEach { result.accept(it) }
-            return result
         } finally {
             configFile?.deleteIfExists()
             catalogFile?.deleteIfExists()
             stateFile?.deleteIfExists()
-            outputFile.deleteIfExists()
         }
     }
 
@@ -90,4 +116,41 @@ data object CliRunner {
                 Files.writeString(file, Jsons.writeValueAsString(contents))
             }
         }
+
+    private val clock: Clock = ClockFactory().fixed()
+
+    class TestOutputStream : OutputStream() {
+
+        val results = BufferingOutputConsumer(clock)
+        private val lineStream = ByteArrayOutputStream()
+        private val printStream = PrintStream(this, true, Charsets.UTF_8)
+
+        val beanDefinition: RuntimeBeanDefinition<PrintStream> =
+            RuntimeBeanDefinition.builder(PrintStream::class.java) { printStream }
+                .singleton(true)
+                .build()
+
+        override fun write(b: Int) {
+            if (b == '\n'.code) {
+                readLine()
+            } else {
+                lineStream.write(b)
+            }
+        }
+
+        override fun close() {
+            readLine()
+            lineStream.close()
+            results.close()
+            super.close()
+        }
+
+        private fun readLine() {
+            val line: String = lineStream.toString(Charsets.UTF_8).trim()
+            lineStream.reset()
+            if (line.isNotBlank()) {
+                results.accept(Jsons.readValue(line, AirbyteMessage::class.java))
+            }
+        }
+    }
 }

airbyte-cdk/bulk/core/base/src/testFixtures/kotlin/io/airbyte/cdk/output/BufferingOutputConsumer.kt

@@ -20,7 +20,6 @@ import java.time.Instant
 /** [OutputConsumer] implementation for unit tests. Collects everything into thread-safe buffers. */
 @Singleton
 @Requires(notEnv = [Environment.CLI])
-@Requires(missingProperty = CONNECTOR_OUTPUT_FILE)
 @Replaces(OutputConsumer::class)
 class BufferingOutputConsumer(
     clock: Clock,

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/write/InputConsumer.kt

@@ -10,6 +10,8 @@ import io.airbyte.cdk.message.MessageQueueWriter
 import io.github.oshai.kotlinlogging.KLogger
 import io.github.oshai.kotlinlogging.KotlinLogging
 import io.micronaut.context.annotation.Factory
+import io.micronaut.context.annotation.Requires
+import io.micronaut.context.env.Environment
 import jakarta.inject.Singleton
 import java.io.InputStream
 import java.nio.charset.StandardCharsets
@@ -68,6 +70,7 @@ class DefaultInputConsumer(
 @Factory
 class InputStreamFactory {
     @Singleton
+    @Requires(notEnv = [Environment.TEST])
     fun make(): InputStream {
         return System.`in`
     }