KAFKA-17574: Allow overriding TestKitNodes baseDirectory

checkstyle/suppressions.xml

@@ -43,6 +43,7 @@
     <suppress checks="ClassFanOutComplexity" files="RemoteLogManagerTest.java"/>
     <suppress checks="MethodLength"
               files="(KafkaClusterTestKit).java"/>
+    <suppress checks="NPathComplexity" files="TestKitNodes.java"/>
     <suppress checks="JavaNCSS"
               files="(RemoteLogManagerTest|SharePartitionTest).java"/>
     <suppress checks="ClassDataAbstractionCoupling|ClassFanOutComplexity" files="SharePartitionManagerTest"/>

test-common/src/main/java/org/apache/kafka/common/test/TestKitNodes.java

@@ -27,6 +27,7 @@
 import org.apache.kafka.server.common.MetadataVersion;
 
 import java.io.File;
+import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Collections;
 import java.util.HashMap;
@@ -51,6 +52,7 @@ public class TestKitNodes {
     public static class Builder {
         private boolean combined;
         private String clusterId;
+        private Path baseDirectory;
         private int numControllerNodes;
         private int numBrokerNodes;
         private int numDisksPerBroker = 1;
@@ -104,6 +106,11 @@ public Builder setPerServerProperties(Map<Integer, Map<String, String>> perServe
             return this;
         }
 
+        public Builder setBaseDirectory(Path baseDirectory) {
+            this.baseDirectory = baseDirectory;
+            return this;
+        }
+
         public Builder setBrokerListenerName(ListenerName listenerName) {
             this.brokerListenerName = listenerName;
             return this;
@@ -128,8 +135,9 @@ public TestKitNodes build() {
             if (brokerSecurityProtocol != SecurityProtocol.PLAINTEXT) {
                 throw new IllegalArgumentException("Currently only support PLAINTEXT security protocol");
             }
-
-            String baseDirectory = TestUtils.tempDirectory().getAbsolutePath();
+            if (baseDirectory == null) {
+                this.baseDirectory = TestUtils.tempDirectory().toPath();
+            }
             if (clusterId == null) {
                 clusterId = Uuid.randomUuid().toString();
             }
@@ -160,7 +168,7 @@ public TestKitNodes build() {
             for (int id : controllerNodeIds) {
                 TestKitNode controllerNode = TestKitNodes.buildControllerNode(
                     id,
-                    baseDirectory,
+                    baseDirectory.toFile().getAbsolutePath(),
                     clusterId,
                     brokerNodeIds.contains(id),
                     perServerProperties.getOrDefault(id, Collections.emptyMap())
@@ -172,7 +180,7 @@ public TestKitNodes build() {
             for (int id : brokerNodeIds) {
                 TestKitNode brokerNode = TestKitNodes.buildBrokerNode(
                     id,
-                    baseDirectory,
+                    baseDirectory.toFile().getAbsolutePath(),
                     clusterId,
                     controllerNodeIds.contains(id),
                     perServerProperties.getOrDefault(id, Collections.emptyMap()),
@@ -181,7 +189,7 @@ public TestKitNodes build() {
                 brokerNodes.put(id, brokerNode);
             }
 
-            return new TestKitNodes(baseDirectory, clusterId, bootstrapMetadata, controllerNodes, brokerNodes,
+            return new TestKitNodes(baseDirectory.toFile().getAbsolutePath(), clusterId, bootstrapMetadata, controllerNodes, brokerNodes,
                 brokerListenerName, brokerSecurityProtocol, new ListenerName("CONTROLLER"), SecurityProtocol.PLAINTEXT);
         }
     }

test-common/src/test/java/org/apache/kafka/common/test/KafkaClusterTestKitTest.java

@@ -21,6 +21,7 @@
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
+import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.Collections;
@@ -32,7 +33,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
-import static org.junit.jupiter.api.Assertions.fail;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class KafkaClusterTestKitTest {
     @ParameterizedTest
@@ -88,7 +89,7 @@ public void testCreateClusterWithBadPerServerProperties() {
 
     @ParameterizedTest
     @ValueSource(booleans = {true, false})
-    public void testCreateClusterAndCloseWithMultipleLogDirs(boolean combined) {
+    public void testCreateClusterAndCloseWithMultipleLogDirs(boolean combined) throws Exception {
         try (KafkaClusterTestKit cluster = new KafkaClusterTestKit.Builder(
                 new TestKitNodes.Builder().
                         setNumBrokerNodes(5).
@@ -118,8 +119,23 @@ public void testCreateClusterAndCloseWithMultipleLogDirs(boolean combined) {
                 String expected = combined ? String.format("combined_%d_0", controllerId) : String.format("controller_%d", controllerId);
                 assertEquals(expected, Paths.get(node.metadataDirectory()).getFileName().toString());
             });
-        } catch (Exception e) {
-            fail("failed to init cluster", e);
+        }
+    }
+
+    @Test
+    public void testCreateClusterWithSpecificBaseDir() throws Exception {
+        Path baseDirectory = TestUtils.tempDirectory().toPath();
+        try (KafkaClusterTestKit cluster = new KafkaClusterTestKit.Builder(
+                new TestKitNodes.Builder().
+                        setBaseDirectory(baseDirectory).
+                        setNumBrokerNodes(1).
+                        setCombined(true).
+                        setNumControllerNodes(1).build()).build()) {
+            assertEquals(cluster.nodes().baseDirectory(), baseDirectory.toFile().getAbsolutePath());
+            cluster.nodes().controllerNodes().values().forEach(controller ->
+                assertTrue(Paths.get(controller.metadataDirectory()).startsWith(baseDirectory)));
+            cluster.nodes().brokerNodes().values().forEach(broker ->
+                assertTrue(Paths.get(broker.metadataDirectory()).startsWith(baseDirectory)));
         }
     }
 }