JavaInstanceFunctionHandler

JavaInstanceFunctionHandler#

package: org.yuanrong.call.

public class JavaInstanceFunctionHandler<R>#

Class that invokes Java instance member functions.

Note

The JavaInstanceFunctionHandler class is a handle to the member functions of a Java class instance after the Java class instance is created; it is the return type of the interface JavaInstanceHandler.function.

Users can use the invoke method of JavaInstanceFunctionHandler to call member functions of Java class instances.

Interface description#

public ObjectRef invoke(Object… args) throws YRException#

The member method of the JavaInstanceFunctionHandler class is used to call the member function of a Java class instance.

  • Parameters:

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

  • 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.

  • Throws:

    • YRException - Unified exception types thrown.

public JavaInstanceFunctionHandler<R> options(InvokeOptions opt)#

The member method of the JavaInstanceFunctionHandler class is used to dynamically modify the parameters of the called Java function.

InvokeOptions invokeOptions = new InvokeOptions();
invokeOptions.addCustomExtensions("app_name", "myApp");
JavaInstanceHandler javaInstanceHandler = YR.instance(JavaInstanceClass.of("com.example.YrlibHandler$MyYRApp")).setUrn("sn:cn:yrk:default:function:0-opc-opc:$latest").invoke();
JavaInstanceFunctionHandler javaInstFuncHandler = javaInstanceHandler.function(JavaInstanceMethod.of("smallCall", String.class)).options(invokeOptions);
ObjectRef ref = javaInstFuncHandler.invoke();
String res = (String)YR.get(ref, 100);

  • Parameters:

    • opt - Function call options, used to specify functions such as calling resources.

  • Returns:

    JavaInstanceFunctionHandler Class handle.

JavaInstanceFunctionHandler(String instanceId, String functionId, String className, JavaInstanceMethod<R> javaInstanceMethod)#

The constructor of JavaInstanceFunctionHandler.

  • Parameters:

    • <R> - the type of the object.

    • instanceId - Java function instance ID.

    • functionId - Java function deployment returns an ID.

    • className - Java function class name.

    • javaInstanceMethod - JavaInstanceMethod class instance.