JavaFunctionHandler

JavaFunctionHandler#

package: org.yuanrong.call.

public class JavaFunctionHandler<R>#

Create an operation class for creating a stateless Java function instance.

Note

The JavaFunctionHandler class is a handle for creating Java function instances; it is the return type of the function (JavaFunction<R> javaFunction)

interface. Users can use JavaFunctionHandler to create and invoke Java function instances.

Interface description#

public JavaFunctionHandler(JavaFunction<R> func)#

JavaFunctionHandler constructor.

  • Parameters:

    • func - JavaFunction class instance.

public ObjectRef invoke(Object… args) throws YRException#

Java function call interface.

  • Parameters:

    • args - The input parameters required to call the specified method.

  • Throws:

    • YRException - Unified exception types thrown.

  • Returns:

    ObjectRef: The “id” of the method’s return value in the data system. Use YR.get() to get the actual return value of the method.

public JavaFunctionHandler<R> setUrn(String urn)#

When Java calls a stateless function in Java, set the functionUrn for the function.

ObjectRef ref1 = YR.function(JavaFunction.of("com.example.YrlibHandler$MyYRApp", "smallCall", String.class))
    .setUrn("sn:cn:yrk:default:function:0-perf-callee:$latest").invoke();
String res = (String)YR.get(ref1, 100);

  • Parameters:

    • urn - functionUrn, can be obtained after the function is deployed.

  • Returns:

    JavaFunctionHandler<R>, with built-in invoke method, can create and invoke the java function instance.

public JavaFunctionHandler<R> options(InvokeOptions opt)#

Used to dynamically modify the parameters of the called function.

InvokeOptions invokeOptions = new InvokeOptions();
invokeOptions.setCpu(1500);
invokeOptions.setMemory(1500);
JavaFunctionHandler javaFuncHandler = YR.function(JavaFunction.of("com.example.YrlibHandler$MyYRApp", "smallCall", String.class))
               .setUrn("sn:cn:yrk:default:function:0-opc-opc:$latest");
ObjectRef ref = javaFuncHandler.options(invokeOptions).invoke();
String result = (String)YR.get(ref, 15);

  • Parameters:

    • opt - See InvokeOptions for details.

  • Returns:

    JavaFunctionHandler<R>, Handles processed by Java function.