Newbie Question: Place a method and call it with a Browser button

Support
#1

Hey All,

I have a method that I’ve written in Java, which houses a database query and creates a file that will be placed in s3.

I want to place a button on the browser screen that will call this method and send it a string.

When the method gets the string, it uses it to query the database, then creates and exports the file for me.

Where do I need to place this method, and what needs to be done for me to call the method with the button push?

Thanks,

Luke

#2

Hello!
Such kind of actions (loading data, creating files, etc) is usually executed on the middleware tier, so you should create a service that will be executed on the middleware tier. It can be easily done with the CUBA Studio:
public://attachments/35306a6b9f6db3301e17f19722b5a09b.png
CUBA Studio will create an interface and its implementation. The only thing you should to do is to add your logic.
Then you should create a button and set it a method name that will be invoked:
public://attachments/c943dece4b6f59173e062465d757edbb.png
And as the final step, you should inject your service and invoke method:
public://attachments/53901f2731dbbe01cc90dc4121e1bd36.png
Best regards,
Daniil.

35306a6b9f6db3301e17f19722b5a09b

c943dece4b6f59173e062465d757edbb

53901f2731dbbe01cc90dc4121e1bd36

1 Like
#3

See also the Organizing Business Logic section of the docs.

#4

Thanks Daniil!

I created the method and added the code in all the right places, but now when I try and build / run the project I’m running into this error:
2017-10-24 13:11:09.012 ERROR [localhost-startStop-1] com.haulmont.cuba.core.sys.AbstractWebAppContextLoader - Error initializing application
org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [com.haulmont.cuba.web.jmx.ConfigStorage@71e102e4] with key ‘app.cuba:type=ConfigStorage’; nested exception is javax.management.InstanceAlreadyExistsException: app.cuba:type=ConfigStorage

Since this new code is the only thing I’ve added, I figure the addition of my method is the problem.

Know where I might have gone wrong?

Thanks,

Luke

#5

Could you share spring.xml & web-spring.xml files from your project?

#7

spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <!-- Annotation-based beans -->
    <context:component-scan base-package="com.company.taxonomy"/>

</beans>

web-spring.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"
       xmlns:context="http://www.springframework.org/schema/context">
    <!-- Annotation-based beans -->
    <context:component-scan base-package="com.company.taxonomy"/>
   <bean class="com.haulmont.cuba.web.sys.remoting.WebRemoteProxyBeanCreator">
        <property name="serverSelector"
                  ref="cuba_ServerSelector"/>
        <property name="remoteServices">
            <map>
                <entry key="taxonomy_ExportDSAsTSVService"
                       value="com.company.taxonomy.service.ExportDSAsTSVService"/>
            </map>
        </property>
    </bean>
</beans>

Thanks in advance for the help!

#8

Update, there was a junk file somewhere in my commit that was causing the break. I made a clean commit of my code and the new build worked just fine. Looks like I need to be more specific / selective with my .gitignore.

Thanks again for all the help here, Daniil.

We can consider this matter closed.

#9

You are welcome!