opcur/src/main/java/at/acdp/opcur/opc/SqrtMethod.java

package at.acdp.opcur.opc;
/*
 * Copyright (c) 2016 Kevin Herron
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *   http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.html.
 */


import org.eclipse.milo.opcua.sdk.server.annotations.UaInputArgument;
import org.eclipse.milo.opcua.sdk.server.annotations.UaMethod;
import org.eclipse.milo.opcua.sdk.server.annotations.UaOutputArgument;
import org.eclipse.milo.opcua.sdk.server.util.AnnotationBasedInvocationHandler.InvocationContext;
import org.eclipse.milo.opcua.sdk.server.util.AnnotationBasedInvocationHandler.Out;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SqrtMethod {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @UaMethod
    public void invoke(
            InvocationContext context,

            @UaInputArgument(
                    name = "x",
                    description = "A value.")
                    Double x,

            @UaOutputArgument(
                    name = "x_sqrt",
                    description = "The positive square root of x. If the argument is NaN or less than zero, the result is NaN.")
                    Out<Double> xSqrt) {

        System.out.println("sqrt(" + x.toString() + ")");
        logger.debug("Invoking sqrt() method of Object '{}'", context.getObjectNode().getBrowseName().getName());

        xSqrt.set(Math.sqrt(x));
    }

}