ConcreteFunction

try (Graph g = new Graph()) {
   Placeholder<TFloat32> input = tf.placeholder(TFloat32.class);
   Add<TFloat32> output = tf.math.add(input, tf.constant(2.0f));
   Signature signature = Signature.builder().input("x", input).output("y", output).build();

   try (Session s = new Session(g)) {
     // Auto-closing the function just as an example but this is not required since it has
     // no effect
     try (ConcreteFunction f = ConcreteFunction.create(signature, s);
         TFloat32 t = TFloat32.scalarOf(2.0f)) {
       assertEquals(4.0f, ((TFloat32)function.call(x)).getFloat());
     
     // Session s is still valid at this point
   }
   // Graph g is still valid at this point
 }
 }

public class MyModel {

   public static Signature addTwo(Ops tf) {
     Placeholder<TFloat32> input = tf.placeholder(TFloat32.class);
     Add<TFloat32> output = tf.math.add(input, tf.constant(2.0f));
     return Signature.builder("addTwo").input("x", input).output("y", output).build();
   

   public static void main(String args[]) {
     try (ConcreteFunction function = ConcreteFunction.create(MyModel::addTwo);
         TFloat32 x = TFloat32.scalarOf(2.0f)) {
       assertEquals(4.0f, ((TFloat32)function.call(x)).getFloat());
     }
   }
 }
 }

try (Graph g = new Graph()) {
   Placeholder<TFloat32> input = tf.placeholder(TFloat32.class);
   Add<TFloat32> output = tf.math.add(input, tf.constant(2.0f));
   Signature signature = Signature.builder().input("x", input).output("y", output).build();

   try (ConcreteFunction f = ConcreteFunction.create(signature, g);
       TFloat32 x = TFloat32.scalarOf(2.0f)) {
     assertEquals(4.0f, ((TFloat32)function.call(x)).getFloat());
   
   // Graph g is still valid at this point
 }
 }