Working prototype

Signed-off-by: Ryan Nett <rnett@calpoly.edu>

Author: rnett

tensorflow-core/tensorflow-core-api/pom.xml

@@ -47,6 +47,11 @@
       <artifactId>ndarray</artifactId>
       <version>${ndarray.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.31</version>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-api</artifactId>
@@ -73,6 +78,12 @@
       <artifactId>jmh-generator-annprocess</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-jdk14</artifactId>
+      <version>1.7.31</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <profiles>

tensorflow-core/tensorflow-core-api/src/gen/annotations/org/tensorflow/op/Ops.java

@@ -376,10 +376,10 @@ public final class Ops {
 
   public final SignalOps signal;
 
-  public final QuantizationOps quantization;
-
   public final TrainOps train;
 
+  public final QuantizationOps quantization;
+
   private final Scope scope;
 
   private Ops(Scope scope) {
@@ -402,8 +402,8 @@ private Ops(Scope scope) {
     math = new MathOps(this);
     audio = new AudioOps(this);
     signal = new SignalOps(this);
-    quantization = new QuantizationOps(this);
     train = new TrainOps(this);
+    quantization = new QuantizationOps(this);
   }
 
   /**

tensorflow-core/tensorflow-core-api/src/gen/java/org/tensorflow/internal/c_api/TFLogEntry.java

@@ -26,5 +26,5 @@ public class TFLogEntry extends Pointer {
   public native @StdString @Cast({"char*", "std::string&&"}) BytePointer FName();
   public native int Line();
   public native @StdString @Cast({"char*", "std::string&&"}) BytePointer ToString();
-  public native @StdString @Cast({"", "", "std::string"}) BytePointer text_message();
+  
 }

tensorflow-core/tensorflow-core-api/src/gen/java/org/tensorflow/internal/c_api/TFLogSink.java

@@ -12,8 +12,20 @@
 @Namespace("tensorflow") @Properties(inherit = org.tensorflow.internal.c_api.presets.tensorflow.class)
 public class TFLogSink extends Pointer {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public TFLogSink() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public TFLogSink(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public TFLogSink(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public TFLogSink position(long position) {
+        return (TFLogSink)super.position(position);
+    }
+    @Override public TFLogSink getPointer(long i) {
+        return new TFLogSink(this).position(position + i);
+    }
 
 
   // `Send` is called synchronously during the log statement.  The logging
@@ -24,7 +36,7 @@ public class TFLogSink extends Pointer {
   // `e` is guaranteed to remain valid until the subsequent call to
   // `WaitTillSent` completes, so implementations may store a pointer to or
   // copy of `e` (e.g. in a thread local variable) for use in `WaitTillSent`.
-  public native void Send(@Const @ByRef TFLogEntry entry);
+  @Virtual(true) public native void Send(@Const @ByRef TFLogEntry entry);
 
   // `WaitTillSent` blocks the calling thread (the thread that generated a log
   // message) until the sink has finished processing the log message.
@@ -34,5 +46,5 @@ public class TFLogSink extends Pointer {
   // The default implementation returns immediately.  Like `Send`,
   // implementations should be careful not to call `LOG` or `CHECK or take any
   // locks that might be held by the `LOG` caller, to avoid deadlock.
-  public native void WaitTillSent();
+  @Virtual public native void WaitTillSent();
 }

tensorflow-core/tensorflow-core-api/src/main/java/org/tensorflow/NativeLogSink.java

@@ -0,0 +1,57 @@
+/*
+  Copyright 2021 The TensorFlow Authors. All Rights Reserved.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ =======================================================================
+
+ */
+package org.tensorflow;
+
+import org.bytedeco.javacpp.Pointer;
+import org.slf4j.ILoggerFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.tensorflow.internal.c_api.TFLogEntry;
+import org.tensorflow.internal.c_api.TFLogSink;
+import org.tensorflow.internal.c_api.global.tensorflow;
+
+public class NativeLogSink extends TFLogSink {
+  private static final ILoggerFactory factory = LoggerFactory.getILoggerFactory();
+  private static final Logger logger = LoggerFactory.getLogger(NativeLogSink.class);
+  NativeLogSink() {
+    super();
+  }
+
+  @Override
+  public void Send(TFLogEntry entry) {
+    //TODO make work, blocked by https://github.com/tensorflow/tensorflow/issues/44995#issuecomment-869091090
+    System.out.printf(
+        "Log message: Severity: %d, Fname: %s, line: %s, string: %s\n", entry.log_severity(), entry.FName().getString(), entry.Line(), entry.ToString().getString());
+//    Logger logger = factory.getLogger(entry.FName().getString());
+//    switch (entry.log_severity()){
+//      case tensorflow.kWarning:
+//        logger.warn(entry.ToString().getString());
+//        break;
+//      case tensorflow.kError:
+//      case tensorflow.kFatal:
+//        logger.error(entry.ToString().getString());
+//        break;
+//      default:
+//        logger.info(entry.ToString().getString());
+//    }
+  }
+
+  @Override
+  public void WaitTillSent() {
+  }
+}

tensorflow-core/tensorflow-core-api/src/main/java/org/tensorflow/TensorFlow.java

@@ -15,6 +15,7 @@
  */
 package org.tensorflow;
 
+import static org.tensorflow.internal.c_api.global.tensorflow.TFAddLogSink;
 import static org.tensorflow.internal.c_api.global.tensorflow.TF_DeleteBuffer;
 import static org.tensorflow.internal.c_api.global.tensorflow.TF_DeleteLibraryHandle;
 import static org.tensorflow.internal.c_api.global.tensorflow.TF_GetAllOpList;
@@ -96,6 +97,13 @@ public static OpList loadLibrary(String filename) {
     }
   }
 
+  @SuppressWarnings("FieldCanBeLocal")
+  private static NativeLogSink sink;
+  private static void setupLogger(){
+    sink = new NativeLogSink();
+    TFAddLogSink(sink);
+  }
+
   private static TF_Library libraryLoad(String filename) {
     try (PointerScope scope = new PointerScope()) {
       TF_Status status = TF_Status.newStatus();
@@ -137,5 +145,6 @@ private TensorFlow() {}
       e.printStackTrace();
       throw e;
     }
+    setupLogger();
   }
 }

tensorflow-core/tensorflow-core-api/src/main/java/org/tensorflow/internal/c_api/presets/tensorflow.java

@@ -403,15 +403,27 @@ public void map(InfoMap infoMap) {
                 .cast()
                 .valueTypes("long")
                 .pointerTypes("LongPointer", "long[]"))
-        .put(new Info("string", "std::string", "tensorflow::string").annotations("@StdString")
-            .valueTypes("@Cast({\"char*\", \"std::string&&\"}) BytePointer", "@Cast({\"char*\", \"std::string&&\"}) String")
-            .pointerTypes("@Cast({\"char*\", \"std::string*\"}) BytePointer"))
+        .put(
+            new Info("string", "std::string", "tensorflow::string")
+                .annotations("@StdString")
+                .valueTypes(
+                    "@Cast({\"char*\", \"std::string&&\"}) BytePointer",
+                    "@Cast({\"char*\", \"std::string&&\"}) String")
+                .pointerTypes("@Cast({\"char*\", \"std::string*\"}) BytePointer"))
+//        .put(
+//            new Info("absl::string_view")
+//                .annotations("@StdString")
+//                .valueTypes(
+//                    "@Cast({\"char*\", \"std::string&&\", \"std::string\"}) BytePointer",
+//                    "@Cast({\"char*\", \"std::string&&\", \"std::string\"}) String"))
         .put(
             new Info("absl::LogSeverity", "LogSeverity", "tensorflow::LogSeverity")
                 .cast()
                 .valueTypes("int")
                 .pointerTypes("IntPointer", "int[]"))
         .put(new Info("tensorflow::TFLogEntry").purify())
+        .put(new Info("tensorflow::TFLogSink").virtualize())
+        .put(new Info("tensorflow::TFLogEntry::text_message").skip())
         .put(
             new Info(
                     "tensorflow::internal::LogEveryNSecState",

tensorflow-framework/pom.xml

@@ -64,6 +64,12 @@
       <artifactId>jmh-generator-annprocess</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-jdk14</artifactId>
+      <version>1.7.31</version>
+      <scope>test</scope>
+    </dependency>
     <!-- Include native binaries dependencies only for testing -->
     <dependency>
       <groupId>org.tensorflow</groupId>