Trying to invoke a java class within my step

[pouncer]

		<step id="testStep">
			<tasklet ref="testBean2"/>
		</step>

	<bean id="testBean2" class="com.investmaster.util.batch.reader.BatchReaderServersideExecution">
	</bean>

package com.investmaster.util.batch.reader;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class BatchReaderServersideExecution
{

    private static final Logger LOG = LoggerFactory.getLogger(BatchReaderServersideExecution.class);
    
    
    public BatchReaderServersideExecution()
    {
        LOG.info("Inside BatchReaderServersideExecution.. will execute oracle functions inside this class..");
    }
}

When I run the job the log trace does actually output:

13:34:20.533 [main] INFO c.i.u.b.r.BatchReaderServersideExecution - Inside BatchReaderServersideExecution.. will execute oracle functions inside this class..

But it crashes with this exception:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testStep': Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [com.investmaster.util.batch.reader.BatchReaderServersideExecution] to required type [org.springframework.batch.core.step.tasklet.Tasklet] for property 'tasklet'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [com.investmaster.util.batch.reader.BatchReaderServersideExecution] to required type [org.springframework.batch.core.step.tasklet.Tasklet] for property 'tasklet': no matching editors or conversion strategy found
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:480)

Can someone help me correct this please?
Many thanks.

[anish555]

Your BatchReaderServersideExecution class should implement Tasklet

[pouncer]

Thanks for the reply Anish, I have made my class implement Tasklet and now get the following error:

org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'testBean' defined in class path resource [jobs/auditEventJob.xml]:
Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: [Assertion failed] - this String argument must have length; it must not be null or empty

[anish555]

Scope of the bean which implements tasklet should be 'step'
e.g. <bean class="com.......tasklet.* " scope="step">


If it doesnt work, Could you post your code again after you made changes.
All your business logic(code which calls oracle functions) should be within execute method.

[pouncer]

I just realised that 'testBean' was another bean I had been messing around with. The code was infact working, I just had forgotten to remove the testBean!! Many thanks anish - implement Tasklet in your first response was all I needed.

package com.investmaster.util.batch.reader;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.InitializingBean;

public class BatchReaderServersideExecution implements Tasklet
{

    private static final Logger LOG = LoggerFactory.getLogger(BatchReaderServersideExecution.class);
    
    
    public BatchReaderServersideExecution()
    {
        LOG.info("Inside BatchReaderServersideExecution.. will execute oracle functions inside this class..");
    }


    @Override
    public RepeatStatus execute(StepContribution arg0, ChunkContext arg1) throws Exception
    {
        LOG.info("I have have soemthing here that will execute oracle functions on the database!");
        
        return RepeatStatus.FINISHED;
    }
}

My other questino is, is it possible to override RepeatStatus.FINISHED or whatever the return codes are?

because it would be nice if I could do something like:

		<step id="testStep">
			<tasklet ref="testBean2"/>
			<next on="MYRETURNCODE" to="anotherBean"/>
		</step>

[trevershick]

I believe you would use the stepContribution instance to set the exit state.

contribution.setExitStatus(new ExitStatus("MYRETURNCODE"));