Change endpoint configuration to select single endpoint

* If REST endpoint is configured, it will be used
* If Kafka endpoint is configured, it will be used
* If both endpoints are configured, REST configuration has precedence and will be used

src/integrationTest/kotlin/dev/dnpm/etl/processor/config/AppConfigurationTest.kt

@@ -0,0 +1,102 @@
+/*
+ * This file is part of ETL-Processor
+ *
+ * Copyright (c) 2023  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.config
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import dev.dnpm.etl.processor.monitoring.RequestRepository
+import dev.dnpm.etl.processor.output.KafkaMtbFileSender
+import dev.dnpm.etl.processor.output.RestMtbFileSender
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.springframework.beans.factory.NoSuchBeanDefinitionException
+import org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.boot.test.mock.mockito.MockBean
+import org.springframework.boot.test.mock.mockito.MockBeans
+import org.springframework.context.ApplicationContext
+import org.springframework.test.context.ContextConfiguration
+import org.springframework.test.context.TestPropertySource
+
+@SpringBootTest
+@ContextConfiguration(classes = [KafkaAutoConfiguration::class, AppKafkaConfiguration::class, AppRestConfiguration::class])
+class AppConfigurationTest {
+
+    @Nested
+    @TestPropertySource(
+        properties = [
+            "app.rest.uri=http://localhost:9000"
+        ]
+    )
+    inner class AppConfigurationRestTest(private val context: ApplicationContext) {
+
+        @Test
+        fun shouldUseRestMtbFileSenderNotKafkaMtbFileSender() {
+            assertThat(context.getBean(RestMtbFileSender::class.java)).isNotNull
+            assertThrows<NoSuchBeanDefinitionException> { context.getBean(KafkaMtbFileSender::class.java) }
+        }
+
+    }
+
+    @Nested
+    @TestPropertySource(
+        properties = [
+            "app.kafka.servers=localhost:9092",
+            "app.kafka.topic=test",
+            "app.kafka.response-topic=test-response",
+            "app.kafka.group-id=test"
+        ]
+    )
+    @MockBeans(value = [
+        MockBean(ObjectMapper::class),
+        MockBean(RequestRepository::class)
+    ])
+    inner class AppConfigurationKafkaTest(private val context: ApplicationContext) {
+
+        @Test
+        fun shouldUseKafkaMtbFileSenderNotRestMtbFileSender() {
+            assertThrows<NoSuchBeanDefinitionException> { context.getBean(RestMtbFileSender::class.java) }
+            assertThat(context.getBean(KafkaMtbFileSender::class.java)).isNotNull
+        }
+
+    }
+
+    @Nested
+    @TestPropertySource(
+        properties = [
+            "app.rest.uri=http://localhost:9000",
+            "app.kafka.servers=localhost:9092",
+            "app.kafka.topic=test",
+            "app.kafka.response-topic=test-response",
+            "app.kafka.group-id=test"
+        ]
+    )
+    inner class AppConfigurationRestInPrecedenceTest(private val context: ApplicationContext) {
+
+        @Test
+        fun shouldUseRestMtbFileSenderNotKafkaMtbFileSender() {
+            assertThat(context.getBean(RestMtbFileSender::class.java)).isNotNull
+            assertThrows<NoSuchBeanDefinitionException> { context.getBean(KafkaMtbFileSender::class.java) }
+        }
+
+    }
+
+}