chore: Make CSV metric files available after container run (#21314)

Signed-off-by: Timo Brandstätter <[email protected]>

Author: timo0

platform-sdk/consensus-otter-docker-app/src/testFixtures/java/org/hiero/consensus/otter/docker/app/DockerManager.java

@@ -42,10 +42,10 @@ public final class DockerManager extends ContainerControlServiceGrpc.ContainerCo
     private static final Logger log = LogManager.getLogger(DockerManager.class);
 
     /** The string location of the docker application jar */
-    private static final String DOCKER_APP_JAR = CONTAINER_APP_WORKING_DIR + "/apps/DockerApp.jar";
+    private static final String DOCKER_APP_JAR = CONTAINER_APP_WORKING_DIR + "apps/DockerApp.jar";
 
     /** The string location of the docker application libraries */
-    private static final String DOCKER_APP_LIBS = CONTAINER_APP_WORKING_DIR + "/lib/*";
+    private static final String DOCKER_APP_LIBS = CONTAINER_APP_WORKING_DIR + "lib/*";
 
     /**
      * The main class in the docker application jar that starts the

platform-sdk/consensus-otter-tests/src/testFixtures/java/org/hiero/otter/fixtures/container/ContainerNode.java

@@ -5,7 +5,10 @@
 import static java.util.Objects.requireNonNull;
 import static org.hiero.otter.fixtures.container.utils.ContainerConstants.CONTAINER_APP_WORKING_DIR;
 import static org.hiero.otter.fixtures.container.utils.ContainerConstants.CONTAINER_CONTROL_PORT;
+import static org.hiero.otter.fixtures.container.utils.ContainerConstants.HASHSTREAM_LOG_PATH;
+import static org.hiero.otter.fixtures.container.utils.ContainerConstants.METRICS_PATH;
 import static org.hiero.otter.fixtures.container.utils.ContainerConstants.NODE_COMMUNICATION_PORT;
+import static org.hiero.otter.fixtures.container.utils.ContainerConstants.SWIRLDS_LOG_PATH;
 import static org.hiero.otter.fixtures.internal.AbstractNetwork.NODE_IDENTIFIER_FORMAT;
 import static org.hiero.otter.fixtures.internal.AbstractNode.LifeCycle.DESTROYED;
 import static org.hiero.otter.fixtures.internal.AbstractNode.LifeCycle.INIT;
@@ -372,17 +375,21 @@ public SingleNodeMarkerFileResult newMarkerFileResult() {
     void destroy() {
         try {
             // copy logs from container to the local filesystem
-            final Path logPath = Path.of("build", "container", NODE_IDENTIFIER_FORMAT.formatted(selfId.id()), "output");
-            Files.createDirectories(logPath.resolve("swirlds-hashstream"));
+            final Path outputPath = Path.of("build", "container", NODE_IDENTIFIER_FORMAT.formatted(selfId.id()));
+            Files.createDirectories(outputPath.resolve("output/swirlds-hashstream"));
+            Files.createDirectories(outputPath.resolve("data/stats"));
 
             container.copyFileFromContainer(
-                    CONTAINER_APP_WORKING_DIR + "/output/swirlds.log",
-                    logPath.resolve("swirlds.log").toString());
+                    CONTAINER_APP_WORKING_DIR + SWIRLDS_LOG_PATH,
+                    outputPath.resolve(SWIRLDS_LOG_PATH).toString());
             container.copyFileFromContainer(
-                    CONTAINER_APP_WORKING_DIR + "/output/swirlds-hashstream/swirlds-hashstream.log",
-                    logPath.resolve("swirlds-hashstream/swirlds-hashstream.log").toString());
+                    CONTAINER_APP_WORKING_DIR + HASHSTREAM_LOG_PATH,
+                    outputPath.resolve(HASHSTREAM_LOG_PATH).toString());
+            container.copyFileFromContainer(
+                    CONTAINER_APP_WORKING_DIR + METRICS_PATH.formatted(selfId.id()),
+                    outputPath.resolve(METRICS_PATH.formatted(selfId.id())).toString());
         } catch (final IOException e) {
-            throw new UncheckedIOException("Failed to copy logs from container", e);
+            throw new UncheckedIOException("Failed to copy files from container", e);
         }
 
         if (lifeCycle == RUNNING) {

platform-sdk/consensus-otter-tests/src/testFixtures/java/org/hiero/otter/fixtures/container/utils/ContainerConstants.java

@@ -12,7 +12,22 @@ public class ContainerConstants {
     /**
      * Working directory of the container
      */
-    public static final String CONTAINER_APP_WORKING_DIR = "/opt/DockerApp";
+    public static final String CONTAINER_APP_WORKING_DIR = "/opt/DockerApp/";
+
+    /**
+     * Path to {@code swirdls.log} file
+     */
+    public static final String SWIRLDS_LOG_PATH = "output/swirlds.log";
+
+    /**
+     * Path to {@code swirlds-hashstream.log} file
+     */
+    public static final String HASHSTREAM_LOG_PATH = "output/swirlds-hashstream/swirlds-hashstream.log";
+
+    /**
+     * Path to {@code MainNetStats{nodeId}.csv} file
+     */
+    public static final String METRICS_PATH = "data/stats/MainNetStats%d.csv";
 
     /**
      * The port to open to allow connections to the