feat: add endpoint for DNPM-Datamodel V2 using content negotiation (#104)

This simply adds an REST endpoint without proper implementation. The goal is to accept DNPM V2 JSON data.

build.gradle.kts

@@ -17,6 +17,7 @@ version = "0.11.0-SNAPSHOT"
 
 var versions = mapOf(
     "bwhc-dto-java" to "0.4.0",
+    "mtb-dto" to "0.1.0-SNAPSHOT",
     "hapi-fhir" to "7.6.0",
     "mockito-kotlin" to "5.4.0",
     "archunit" to "1.3.0",
@@ -48,9 +49,18 @@ configurations {
     compileOnly {
         extendsFrom(configurations.annotationProcessor.get())
     }
+
+    all {
+        resolutionStrategy {
+            cacheChangingModulesFor(5, "minutes")
+        }
+    }
 }
 
 repositories {
+    maven {
+        url = uri("https://git.dnpm.dev/api/packages/public-snapshots/maven")
+    }
     maven {
         url = uri("https://git.dnpm.dev/api/packages/public/maven")
     }
@@ -72,6 +82,7 @@ dependencies {
     implementation("commons-codec:commons-codec")
     implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
     implementation("de.ukw.ccc:bwhc-dto-java:${versions["bwhc-dto-java"]}")
+    implementation("dev.pcvolkmer.mv64e:mtb-dto:${versions["mtb-dto"]}") { isChanging = true }
     implementation("ca.uhn.hapi.fhir:hapi-fhir-base:${versions["hapi-fhir"]}")
     implementation("ca.uhn.hapi.fhir:hapi-fhir-structures-r4:${versions["hapi-fhir"]}")
     implementation("org.apache.httpcomponents.client5:httpclient5")

src/main/kotlin/dev/dnpm/etl/processor/extensions.kt

@@ -0,0 +1,35 @@
+/*
+ * This file is part of ETL-Processor
+ *
+ * Copyright (c) 2025  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.dnpm.etl.processor
+
+import org.springframework.http.MediaType
+
+/**
+ * Custom MediaTypes
+ *
+ * @since 0.11.0
+ */
+object CustomMediaType {
+    val APPLICATION_VND_DNPM_V2_MTB_JSON = MediaType("application", "vnd.dnpm.v2.mtb+json")
+    const val APPLICATION_VND_DNPM_V2_MTB_JSON_VALUE = "application/vnd.dnpm.v2.mtb+json"
+
+    val APPLICATION_VND_DNPM_V2_RD_JSON = MediaType("application", "vnd.dnpm.v2.rd+json")
+    const val APPLICATION_VND_DNPM_V2_RD_JSON_VALUE = "application/vnd.dnpm.v2.rd+json"
+}

src/main/kotlin/dev/dnpm/etl/processor/input/KafkaInputListener.kt

@@ -1,7 +1,7 @@
 /*
  * This file is part of ETL-Processor
  *
- * Copyright (c) 2024  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ * Copyright (c) 2025  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published
@@ -22,11 +22,13 @@ package dev.dnpm.etl.processor.input
 import com.fasterxml.jackson.databind.ObjectMapper
 import de.ukw.ccc.bwhc.dto.Consent
 import de.ukw.ccc.bwhc.dto.MtbFile
+import dev.dnpm.etl.processor.CustomMediaType
 import dev.dnpm.etl.processor.PatientId
 import dev.dnpm.etl.processor.RequestId
 import dev.dnpm.etl.processor.services.RequestProcessor
 import org.apache.kafka.clients.consumer.ConsumerRecord
 import org.slf4j.LoggerFactory
+import org.springframework.http.MediaType
 import org.springframework.kafka.listener.MessageListener
 
 class KafkaInputListener(
@@ -35,10 +37,29 @@ class KafkaInputListener(
 ) : MessageListener<String, String> {
     private val logger = LoggerFactory.getLogger(KafkaInputListener::class.java)
 
-    override fun onMessage(data: ConsumerRecord<String, String>) {
+    override fun onMessage(record: ConsumerRecord<String, String>) {
-        val mtbFile = objectMapper.readValue(data.value(), MtbFile::class.java)
+        when (guessMimeType(record)) {
+            MediaType.APPLICATION_JSON_VALUE -> handleBwhcMessage(record)
+            CustomMediaType.APPLICATION_VND_DNPM_V2_MTB_JSON_VALUE -> handleDnpmV2Message(record)
+            else -> {
+                /* ignore other messages */
+            }
+        }
+    }
+
+    private fun guessMimeType(record: ConsumerRecord<String, String>): String {
+        if (record.headers().headers("contentType").toList().isEmpty()) {
+            // Fallback if no contentType set (old behavior)
+            return MediaType.APPLICATION_JSON_VALUE
+        }
+
+        return record.headers().headers("contentType")?.firstOrNull()?.value().contentToString()
+    }
+
+    private fun handleBwhcMessage(record: ConsumerRecord<String, String>) {
+        val mtbFile = objectMapper.readValue(record.value(), MtbFile::class.java)
         val patientId = PatientId(mtbFile.patient.id)
-        val firstRequestIdHeader = data.headers().headers("requestId")?.firstOrNull()
+        val firstRequestIdHeader = record.headers().headers("requestId")?.firstOrNull()
         val requestId = if (null != firstRequestIdHeader) {
             RequestId(String(firstRequestIdHeader.value()))
         } else {
@@ -61,4 +82,10 @@ class KafkaInputListener(
             }
         }
     }
+
+    private fun handleDnpmV2Message(record: ConsumerRecord<String, String>) {
+        // Do not handle DNPM-V2 for now
+        logger.warn("Ignoring MTB File in DNPM V2 format: Not implemented yet")
+    }
+
 }

src/main/kotlin/dev/dnpm/etl/processor/input/MtbFileRestController.kt

@@ -21,9 +21,13 @@ package dev.dnpm.etl.processor.input
 
 import de.ukw.ccc.bwhc.dto.Consent
 import de.ukw.ccc.bwhc.dto.MtbFile
+import dev.dnpm.etl.processor.CustomMediaType
 import dev.dnpm.etl.processor.PatientId
 import dev.dnpm.etl.processor.services.RequestProcessor
+import dev.pcvolkmer.mv64e.mtb.Mtb
 import org.slf4j.LoggerFactory
+import org.springframework.http.HttpStatus
+import org.springframework.http.MediaType
 import org.springframework.http.ResponseEntity
 import org.springframework.web.bind.annotation.*
 
@@ -40,7 +44,7 @@ class MtbFileRestController(
         return ResponseEntity.ok("Test")
     }
 
-    @PostMapping
+    @PostMapping( consumes = [ MediaType.APPLICATION_JSON_VALUE ] )
     fun mtbFile(@RequestBody mtbFile: MtbFile): ResponseEntity<Unit> {
         if (mtbFile.consent.status == Consent.Status.ACTIVE) {
             logger.debug("Accepted MTB File for processing")
@@ -53,6 +57,11 @@ class MtbFileRestController(
         return ResponseEntity.accepted().build()
     }
 
+    @PostMapping( consumes = [ CustomMediaType.APPLICATION_VND_DNPM_V2_MTB_JSON_VALUE] )
+    fun mtbFile(@RequestBody mtbFile: Mtb): ResponseEntity<Unit> {
+        return ResponseEntity.status(HttpStatus.NOT_IMPLEMENTED).build()
+    }
+
     @DeleteMapping(path = ["{patientId}"])
     fun deleteData(@PathVariable patientId: String): ResponseEntity<Unit> {
         logger.debug("Accepted patient ID to process deletion")

src/test/kotlin/dev/dnpm/etl/processor/input/KafkaInputListenerTest.kt

@@ -1,7 +1,7 @@
 /*
  * This file is part of ETL-Processor
  *
- * Copyright (c) 2024  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ * Copyright (c) 2025  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published
@@ -23,6 +23,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import de.ukw.ccc.bwhc.dto.Consent
 import de.ukw.ccc.bwhc.dto.MtbFile
 import de.ukw.ccc.bwhc.dto.Patient
+import dev.dnpm.etl.processor.CustomMediaType
 import dev.dnpm.etl.processor.services.RequestProcessor
 import org.apache.kafka.clients.consumer.ConsumerRecord
 import org.apache.kafka.common.header.internals.RecordHeader
@@ -63,7 +64,15 @@ class KafkaInputListenerTest {
             .withConsent(Consent.builder().withStatus(Consent.Status.ACTIVE).build())
             .build()
 
-        kafkaInputListener.onMessage(ConsumerRecord("testtopic", 0, 0, "", this.objectMapper.writeValueAsString(mtbFile)))
+        kafkaInputListener.onMessage(
+            ConsumerRecord(
+                "testtopic",
+                0,
+                0,
+                "",
+                this.objectMapper.writeValueAsString(mtbFile)
+            )
+        )
 
         verify(requestProcessor, times(1)).processMtbFile(any())
     }
@@ -75,7 +84,15 @@ class KafkaInputListenerTest {
             .withConsent(Consent.builder().withStatus(Consent.Status.REJECTED).build())
             .build()
 
-        kafkaInputListener.onMessage(ConsumerRecord("testtopic", 0, 0, "", this.objectMapper.writeValueAsString(mtbFile)))
+        kafkaInputListener.onMessage(
+            ConsumerRecord(
+                "testtopic",
+                0,
+                0,
+                "",
+                this.objectMapper.writeValueAsString(mtbFile)
+            )
+        )
 
         verify(requestProcessor, times(1)).processDeletion(anyValueClass())
     }
@@ -89,7 +106,19 @@ class KafkaInputListenerTest {
 
         val headers = RecordHeaders(listOf(RecordHeader("requestId", UUID.randomUUID().toString().toByteArray())))
         kafkaInputListener.onMessage(
-            ConsumerRecord("testtopic", 0, 0, -1L, TimestampType.NO_TIMESTAMP_TYPE, -1, -1, "", this.objectMapper.writeValueAsString(mtbFile), headers, Optional.empty())
+            ConsumerRecord(
+                "testtopic",
+                0,
+                0,
+                -1L,
+                TimestampType.NO_TIMESTAMP_TYPE,
+                -1,
+                -1,
+                "",
+                this.objectMapper.writeValueAsString(mtbFile),
+                headers,
+                Optional.empty()
+            )
         )
 
         verify(requestProcessor, times(1)).processMtbFile(any(), anyValueClass())
@@ -104,9 +133,52 @@ class KafkaInputListenerTest {
 
         val headers = RecordHeaders(listOf(RecordHeader("requestId", UUID.randomUUID().toString().toByteArray())))
         kafkaInputListener.onMessage(
-            ConsumerRecord("testtopic", 0, 0, -1L, TimestampType.NO_TIMESTAMP_TYPE, -1, -1, "", this.objectMapper.writeValueAsString(mtbFile), headers, Optional.empty())
+            ConsumerRecord(
+                "testtopic",
+                0,
+                0,
+                -1L,
+                TimestampType.NO_TIMESTAMP_TYPE,
+                -1,
+                -1,
+                "",
+                this.objectMapper.writeValueAsString(mtbFile),
+                headers,
+                Optional.empty()
+            )
         )
         verify(requestProcessor, times(1)).processDeletion(anyValueClass(), anyValueClass())
     }
 
+    @Test
+    fun shouldNotProcessDnpmV2Request() {
+        val mtbFile = MtbFile.builder()
+            .withPatient(Patient.builder().withId("DUMMY_12345678").build())
+            .withConsent(Consent.builder().withStatus(Consent.Status.REJECTED).build())
+            .build()
+
+        val headers = RecordHeaders(
+            listOf(
+                RecordHeader("requestId", UUID.randomUUID().toString().toByteArray()),
+                RecordHeader("contentType", CustomMediaType.APPLICATION_VND_DNPM_V2_MTB_JSON_VALUE.toByteArray())
+            )
+        )
+        kafkaInputListener.onMessage(
+            ConsumerRecord(
+                "testtopic",
+                0,
+                0,
+                -1L,
+                TimestampType.NO_TIMESTAMP_TYPE,
+                -1,
+                -1,
+                "",
+                this.objectMapper.writeValueAsString(mtbFile),
+                headers,
+                Optional.empty()
+            )
+        )
+        verify(requestProcessor, times(0)).processDeletion(anyValueClass(), anyValueClass())
+    }
+
 }

src/test/kotlin/dev/dnpm/etl/processor/input/MtbFileRestControllerTest.kt

@@ -21,6 +21,7 @@ package dev.dnpm.etl.processor.input
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import de.ukw.ccc.bwhc.dto.*
+import dev.dnpm.etl.processor.CustomMediaType
 import dev.dnpm.etl.processor.services.RequestProcessor
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Nested
@@ -32,6 +33,7 @@ import org.mockito.Mockito.verify
 import org.mockito.junit.jupiter.MockitoExtension
 import org.mockito.kotlin.any
 import org.mockito.kotlin.anyValueClass
+import org.springframework.core.io.ClassPathResource
 import org.springframework.http.MediaType
 import org.springframework.test.web.servlet.MockMvc
 import org.springframework.test.web.servlet.delete
@@ -155,6 +157,40 @@ class MtbFileRestControllerTest {
         }
     }
 
+    @Nested
+    inner class RequestsForDnpmDataModel21 {
+
+        private lateinit var mockMvc: MockMvc
+
+        private lateinit var requestProcessor: RequestProcessor
+
+        @BeforeEach
+        fun setup(
+            @Mock requestProcessor: RequestProcessor
+        ) {
+            this.requestProcessor = requestProcessor
+            val controller = MtbFileRestController(requestProcessor)
+            this.mockMvc = MockMvcBuilders.standaloneSetup(controller).build()
+        }
+
+        @Test
+        fun shouldRespondPostRequest() {
+            val mtbFileContent = ClassPathResource("mv64e-mtb-fake-patient.json").inputStream.readAllBytes().toString(Charsets.UTF_8)
+
+            mockMvc.post("/mtb") {
+                content = mtbFileContent
+                contentType = CustomMediaType.APPLICATION_VND_DNPM_V2_MTB_JSON
+            }.andExpect {
+                status {
+                    isNotImplemented()
+                }
+            }
+
+            verify(requestProcessor, times(0)).processMtbFile(any())
+        }
+
+    }
+
     companion object {
         fun bwhcMtbFileContent(consentStatus: Consent.Status) = MtbFile.builder()
             .withPatient(