FunctionHandler

FunctionHandler#

package: org.yuanrong.call.

public class FunctionHandler extends Handler#

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

Note

The FunctionHandler class is the handle for Java functions on the cloud; it is the return type of the interface YR.function(YRFuncR<R> func).

Users can use FunctionHandler to create and invoke Java function instances.

Interface description#

public FunctionHandler(YRFuncR<R> func)#

FunctionHandler Constructor.

  • Parameters:

    • func - Java function name, openYuanrong currently supports 0 ~ 5 parameters and one return value for user functions.

public ObjectRef invoke(Object… args) throws YRException#

Java function call interface.

  • 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 FunctionHandler<R> options(InvokeOptions opt)#

Used to dynamically modify the parameters of the called function.

Config conf = new Config("FunctionURN", "ip", "ip", "", false);
YR.init(conf);
InvokeOptions opts = new InvokeOptions();
opts.setCpu(300);
FunctionHandler<String> f_h = YR.function(MyYRApp::myFunction).options(opts);
ObjectRef res = f_h.invoke();
System.out.println("myFunction invoke ref:" + res.getObjId());
YR.Finalize();

  • Parameters:

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

  • Returns:

    FunctionHandler Class handle.