How to run java workflow with SpringMVC

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package org.neuro4j.workflow.tutorial.mvc.service;

public interface UserService{
	
	public String serve(String fruit);

}


        

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package org.neuro4j.workflow.tutorial.mvc.service;

import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

	public String serve(String fruit) {
		return "I like " + fruit + "!";
	}

}

• CustomBlock which calls service. Spring will set service implementation during initialization.

        
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package org.neuro4j.workflow.tutorial.mvc.views;

import static org.neuro4j.workflow.tutorial.mvc.views.BlockWithService.IN_FRUIT;
import static org.neuro4j.workflow.tutorial.mvc.views.BlockWithService.OUT_MESSAGE;

import org.neuro4j.workflow.FlowContext;
import org.neuro4j.workflow.common.FlowExecutionException;
import org.neuro4j.workflow.common.FlowInitializationException;
import org.neuro4j.workflow.common.ParameterDefinition;
import org.neuro4j.workflow.common.ParameterDefinitionList;
import org.neuro4j.workflow.node.CustomBlock;
import org.neuro4j.workflow.tutorial.mvc.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@ParameterDefinitionList(input = { @ParameterDefinition(name = IN_FRUIT, isOptional = true, type = "java.lang.String") }, 
                         output = { @ParameterDefinition(name = OUT_MESSAGE, isOptional = true, type = "java.lang.String") })
@Component
public class BlockWithService extends CustomBlock {

	static final String IN_FRUIT = "fruit";

	static final String OUT_MESSAGE = "message";

	@Autowired
	private UserService userService;

	public int execute(FlowContext ctx) throws FlowExecutionException {

		String fruit = (String) ctx.get(IN_FRUIT);
		//
		if (fruit == null) {
			return ERROR;
		}

		String message = userService.serve(fruit);

		ctx.put(OUT_MESSAGE, message);

		return NEXT;
	}

	@Override
	public void init() throws FlowInitializationException {
		super.init();
	}

}


        
        

        
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package org.neuro4j.workflow.tutorial.mvc.views;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.neuro4j.workflow.FlowContext;
import org.neuro4j.workflow.common.FlowExecutionException;
import org.neuro4j.workflow.springmvc.AbstractWorkflowController;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller

public class ViewsController extends AbstractWorkflowController{

	@RequestMapping(value="/simpleview", method=RequestMethod.GET)
	public ModelAndView prepare(Model model, HttpServletRequest request, HttpServletResponse response) throws FlowExecutionException {
		model.addAttribute("fruit", "apple");
		
		FlowContext context =  processWorkflow("org.neuro4j.workflow.tutorial.mvc.views.ViewFlow-Start", model, request, response);

		return  createModelView(context);
	}
	

}


        

• servlet-context.xml defines <beans:bean class="org.neuro4j.workflow.springmvc.WorkflowWebApplicationListener" />.. Bean will set up initializer for CustomBlock.

        
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<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
	xmlns:task="http://www.springframework.org/schema/task"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
		http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">


	<annotation-driven />

	<beans:bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>

	<beans:bean	class="org.neuro4j.workflow.springmvc.WorkflowWebApplicationListener" />


	<task:annotation-driven />

	<beans:import resource="controllers.xml" />

</beans:beans>


        

mvn clean install

Hello from SpringMVC! 
Click on link to call SpringMVC controller.