Supports adapters in download dir

serving/docs/adapters.md

@@ -20,6 +20,7 @@ There are several options to choose between for managing your set of adapters.
 
 The easiest option is to use an adapters local directory.
 This is as easy as adding a directory of adapters alongside your model files.
+It can be inside either the same directory as the serving.properties or the directory of an s3 `model_id`.
 It should contain an overarching adapters directory with an artifact directory for each adapter to add.
 This works best for having a manageable set of adapters as they are all loaded on startup.
 It can be used in conjunction with services like [Amazon SageMaker Single Model Endpoint](https://docs.aws.amazon.com/sagemaker/latest/dg/realtime-single-model.html).

serving/src/test/java/ai/djl/serving/ModelServerTest.java

@@ -165,13 +165,15 @@ public void beforeSuite() throws IOException {
         ZipUtils.zip(Paths.get("build/classes/java/test/"), dest, true);
         String engineCacheDir = Utils.getEngineCacheDir().toString();
         System.setProperty("DJL_CACHE_DIR", "build/cache");
+        System.setProperty("DJL_TEST_S3_NO_CREDENTIALS", "true");
         System.setProperty("ENGINE_CACHE_DIR", engineCacheDir);
     }
 
     @AfterSuite
     public void afterSuite() {
         System.clearProperty("DJL_CACHE_DIR");
         System.clearProperty("ENGINE_CACHE_DIR");
+        System.clearProperty("DJL_TEST_S3_NO_CREDENTIALS");
     }
 
     @AfterMethod
@@ -331,6 +333,26 @@ public void testAdapterWorkflows()
         }
     }
 
+    @Test
+    public void testAdaptersInModelDir()
+            throws ServerStartupException, GeneralSecurityException, ParseException, IOException,
+                    InterruptedException, ReflectiveOperationException {
+        ModelServer server =
+                initTestServer("src/test/resources/adaptersInModelDir/config.properties");
+        try {
+            assertTrue(server.isRunning());
+            Channel channel = initTestChannel();
+
+            testAdapterPredict(channel, "modelProp", "a", "");
+
+            channel.close().sync();
+
+            ConfigManagerTest.testSsl();
+        } finally {
+            server.stop();
+        }
+    }
+
     @Test
     public void testAdapterSME()
             throws ServerStartupException, GeneralSecurityException, ParseException, IOException,
@@ -917,16 +939,23 @@ private void testAdapterNoPredictRegister() throws InterruptedException {
     }
 
     private void testAdapterPredict(Channel channel) throws InterruptedException {
+        testAdapterPredict(channel, "adaptecho", "adaptable", "opt");
+    }
+
+    private void testAdapterPredict(
+            Channel channel, String model, String adapter, String adaptOption)
+            throws InterruptedException {
         logTestFunction();
-        String url = "/predictions/adaptecho?adapter=adaptable";
+        String url = "/predictions/" + model + "?adapter=" + adapter;
+        String payload = "testPredictAdapter";
         DefaultFullHttpRequest req =
                 new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.POST, url);
-        req.content().writeBytes("testPredictAdapter".getBytes(StandardCharsets.UTF_8));
+        req.content().writeBytes(payload.getBytes(StandardCharsets.UTF_8));
         HttpUtil.setContentLength(req, req.content().readableBytes());
         req.headers().set(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.TEXT_PLAIN);
         request(channel, req);
         assertHttpOk();
-        assertEquals(result, "adaptableopttestPredictAdapter");
+        assertEquals(result, adapter + adaptOption + payload);
     }
 
     private void testAdapterDirPredict(Channel channel) throws InterruptedException {

serving/src/test/resources/adaptersInModelDir/config.properties

@@ -0,0 +1,4 @@
+inference_address=https://127.0.0.1:8443
+management_address=https://127.0.0.1:8443
+model_store=build/models
+load_models=src/test/resources/adaptersInModelDir/modelProp

serving/src/test/resources/adaptersInModelDir/modelProp/model.py

@@ -0,0 +1 @@
+../../../../../../engines/python/src/test/resources/adaptecho/model.py

serving/src/test/resources/adaptersInModelDir/modelProp/serving.properties

@@ -0,0 +1,5 @@
+option.pythonExecutable=python3
+option.model_id=s3://djl-ai/resources/test-models/s3AdaptersInModelDir
+option.entryPoint=model.py
+option.handler=handle
+retry_threshold=0

serving/src/test/resources/adaptersInModelDir/s3AdaptersInModelDir/adapters/a/readme.md

@@ -0,0 +1 @@
+# Adapter A placeholder

serving/src/test/resources/adaptersInModelDir/s3AdaptersInModelDir/adapters/b/readme.md

@@ -0,0 +1 @@
+# Adapter B placeholder

wlm/src/main/java/ai/djl/serving/wlm/ModelInfo.java

@@ -272,30 +272,38 @@
 
             if (models.isEmpty()) {
                 // Check for adapters on first load
-                if (Files.isDirectory(modelDir.resolve("adapters"))) {
-                    Files.list(modelDir.resolve("adapters"))
-                            .forEach(
-                                    adapterDir -> {
-                                        eventManager.onAdapterLoading(this, adapterDir);
-                                        long start = System.nanoTime();
-                                        String adapterName = adapterDir.getFileName().toString();
-                                        Adapter adapter =
-                                                Adapter.newInstance(
-                                                        this,
-                                                        adapterName,
-                                                        adapterDir.toAbsolutePath().toString(),
-                                                        Collections.emptyMap());
-                                        registerAdapter(adapter);
-                                        long d = (System.nanoTime() - start) / 1000;
-                                        Metric me =
-                                                new Metric(
-                                                        "LoadAdapter",
-                                                        d,
-                                                        Unit.MICROSECONDS,
-                                                        dimension);
-                                        MODEL_METRIC.info("{}", me);
-                                        eventManager.onAdapterLoaded(this, adapter);
-                                    });
+                List<Path> possibleAdapterDirs = new ArrayList<>(2);
+                possibleAdapterDirs.add(modelDir);
+                if (downloadDir != null && !modelDir.equals(downloadDir)) {
+                    possibleAdapterDirs.add(downloadDir);
+                }
+                for (Path parentDir : possibleAdapterDirs) {
+                    if (Files.isDirectory(parentDir.resolve("adapters"))) {
+                        Files.list(parentDir.resolve("adapters"))
+                                .forEach(
+                                        adapterDir -> {
+                                            eventManager.onAdapterLoading(this, adapterDir);
+                                            long start = System.nanoTime();
+                                            String adapterName =
+                                                    adapterDir.getFileName().toString();
+                                            Adapter adapter =
+                                                    Adapter.newInstance(
+                                                            this,
+                                                            adapterName,
+                                                            adapterDir.toAbsolutePath().toString(),
+                                                            Collections.emptyMap());
+                                            registerAdapter(adapter);
+                                            long d = (System.nanoTime() - start) / 1000;
+                                            Metric me =
+                                                    new Metric(
+                                                            "LoadAdapter",
+                                                            d,
+                                                            Unit.MICROSECONDS,
+                                                            dimension);
+                                            MODEL_METRIC.info("{}", me);
+                                            eventManager.onAdapterLoaded(this, adapter);
+                                        });
+                    }
                 }
             }
 
@@ -1088,7 +1096,13 @@
                         };
             } else {
                 logger.info("s5cmd is not installed, using aws cli");
-                commands = new String[] {"aws", "s3", "sync", src, dest};
+                if (Boolean.parseBoolean(
+                        Utils.getEnvOrSystemProperty("DJL_TEST_S3_NO_CREDENTIALS"))) {
+                    logger.info("Skipping s3 credentials");
+                    commands = new String[] {"aws", "s3", "sync", "--no-sign-request", src, dest};
+                } else {
+                    commands = new String[] {"aws", "s3", "sync", src, dest};
+                }
             }
             Process exec = new ProcessBuilder(commands).redirectErrorStream(true).start();
             String logOutput;
@@ -1097,7 +1111,7 @@
             }
             int exitCode = exec.waitFor();
             if (0 != exitCode || logOutput.startsWith("ERROR ")) {
-                logger.error(logOutput);
+                logger.error("Download error: {}", logOutput);
                 throw new EngineException("Download model failed.");
             } else {
                 logger.debug(logOutput);