Revert "Revert "Balder/wire executor to ml model importing""

3 files changed, 38 insertions, 115 deletions

diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModel.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModel.java
index cf92cbc1e89..0152669ef78 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModel.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModel.java
@@ -13,7 +13,6 @@ import com.yahoo.tensor.TensorType;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.StringReader;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModels.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModels.java
deleted file mode 100644
index fc576df0f09..00000000000
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/ImportedModels.java
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-package ai.vespa.rankingexpression.importer;
-
-import com.yahoo.path.Path;
-
-import java.io.File;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Optional;
-
-// TODO: Remove this class after November 2018
-public class ImportedModels {
-
-    /** All imported models, indexed by their names */
-    private final Map<String, ImportedModel> importedModels;
-
-    /** Create a null imported models */
-    public ImportedModels() {
-        importedModels = Collections.emptyMap();
-    }
-
-    public ImportedModels(File modelsDirectory, Collection<ModelImporter> importers) {
-        Map<String, ImportedModel> models = new HashMap<>();
-
-        // Find all subdirectories recursively which contains a model we can read
-        importRecursively(modelsDirectory, models, importers);
-        importedModels = Collections.unmodifiableMap(models);
-    }
-
-    /**
-     * Returns the model at the given location in the application package.
-     *
-     * @param modelPath the path to this model (file or directory, depending on model type)
-     *                  under the application package, both from the root or relative to the
-     *                  models directory works
-     * @return the model at this path or null if none
-     */
-    public ImportedModel get(File modelPath) {
-        return importedModels.get(toName(modelPath));
-    }
-
-    /** Returns an immutable collection of all the imported models */
-    public Collection<ImportedModel> all() {
-        return importedModels.values();
-    }
-
-    private static void importRecursively(File dir,
-                                          Map<String, ImportedModel> models,
-                                          Collection<ModelImporter> importers) {
-        if ( ! dir.isDirectory()) return;
-
-        Arrays.stream(dir.listFiles()).sorted().forEach(child -> {
-            Optional<ModelImporter> importer = findImporterOf(child, importers);
-            if (importer.isPresent()) {
-                String name = toName(child);
-                ImportedModel existing = models.get(name);
-                if (existing != null)
-                    throw new IllegalArgumentException("The models in " + child + " and " + existing.source() +
-                                                       " both resolve to the model name '" + name + "'");
-                models.put(name, importer.get().importModel(name, child));
-            }
-            else {
-                importRecursively(child, models, importers);
-            }
-        });
-    }
-
-    private static Optional<ModelImporter> findImporterOf(File path, Collection<ModelImporter> importers) {
-        return importers.stream().filter(item -> item.canImport(path.toString())).findFirst();
-    }
-
-    private static String toName(File modelFile) {
-        Path modelPath = Path.fromString(modelFile.toString());
-        if (modelFile.isFile())
-            modelPath = stripFileEnding(modelPath);
-        String localPath = concatenateAfterModelsDirectory(modelPath);
-        return localPath.replace('.', '_');
-    }
-
-    private static Path stripFileEnding(Path path) {
-        int dotIndex = path.last().lastIndexOf(".");
-        if (dotIndex <= 0) return path;
-        return path.withLast(path.last().substring(0, dotIndex));
-    }
-
-    private static String concatenateAfterModelsDirectory(Path path) {
-        boolean afterModels = false;
-        StringBuilder result = new StringBuilder();
-        for (String element : path.elements()) {
-            if (afterModels) result.append(element).append("_");
-            if (element.equals("models")) afterModels = true;
-        }
-        return result.substring(0, result.length()-1);
-    }
-
-}
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/configmodelview/ImportedMlModels.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/configmodelview/ImportedMlModels.java
index 4039de85e31..8ea3b00d423 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/configmodelview/ImportedMlModels.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/configmodelview/ImportedMlModels.java
@@ -10,6 +10,10 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
 
 /**
  * All models imported from the models/ directory in the application package.
@@ -24,18 +28,29 @@ public class ImportedMlModels {
     private final Map<String, ImportedMlModel> importedModels;
 
     /** Models that were not imported due to some error */
-    private final Map<String, String> skippedModels = new HashMap<>();
+    private final Map<String, String> skippedModels = new ConcurrentHashMap<>();
 
     /** Create a null imported models */
     public ImportedMlModels() {
         importedModels = Collections.emptyMap();
     }
 
-    public ImportedMlModels(File modelsDirectory, Collection<MlModelImporter> importers) {
-        Map<String, ImportedMlModel> models = new HashMap<>();
+    public ImportedMlModels(File modelsDirectory, ExecutorService executor, Collection<MlModelImporter> importers) {
+        Map<String, Future<ImportedMlModel>> futureModels = new HashMap<>();
 
         // Find all subdirectories recursively which contains a model we can read
-        importRecursively(modelsDirectory, models, importers, skippedModels);
+        importRecursively(modelsDirectory, executor, futureModels, importers, skippedModels);
+        Map<String, ImportedMlModel> models = new HashMap<>();
+        futureModels.forEach((name, future) -> {
+            try {
+                ImportedMlModel model = future.get();
+                if (model != null) {
+                    models.put(name, model);
+                }
+            } catch (InterruptedException | ExecutionException e) {
+                skippedModels.put(name, e.getMessage());
+            }
+        });
         importedModels = Collections.unmodifiableMap(models);
     }
 
@@ -61,7 +76,8 @@ public class ImportedMlModels {
     }
 
     private static void importRecursively(File dir,
-                                          Map<String, ImportedMlModel> models,
+                                          ExecutorService executor,
+                                          Map<String, Future<ImportedMlModel>> models,
                                           Collection<MlModelImporter> importers,
                                           Map<String, String> skippedModels) {
         if ( ! dir.isDirectory()) return;
@@ -70,19 +86,26 @@ public class ImportedMlModels {
             Optional<MlModelImporter> importer = findImporterOf(child, importers);
             if (importer.isPresent()) {
                 String name = toName(child);
-                ImportedMlModel existing = models.get(name);
-                if (existing != null)
-                    throw new IllegalArgumentException("The models in " + child + " and " + existing.source() +
-                                                       " both resolve to the model name '" + name + "'");
-                try {
-                    ImportedMlModel importedModel = importer.get().importModel(name, child);
-                    models.put(name, importedModel);
-                } catch (RuntimeException e) {
-                    skippedModels.put(name, e.getMessage());
+                Future<ImportedMlModel> existing = models.get(name);
+                if (existing != null) {
+                    try {
+                        throw new IllegalArgumentException("The models in " + child + " and " + existing.get().source() +
+                                " both resolve to the model name '" + name + "'");
+                    } catch (InterruptedException | ExecutionException e) {}
                 }
+
+                Future<ImportedMlModel> future = executor.submit(() -> {
+                    try {
+                        return importer.get().importModel(name, child);
+                    } catch (RuntimeException e) {
+                        skippedModels.put(name, e.getMessage());
+                    }
+                    return null;
+                });
+                models.put(name, future);
             }
             else {
-                importRecursively(child, models, importers, skippedModels);
+                importRecursively(child, executor, models, importers, skippedModels);
             }
         });
     }