I am trying to configure a spring batch step without an item writer using below configuraion. However i get error saying that writer element has neither a 'writer' attribute nor a element.
I went through the link spring batch : Tasklet without ItemWriter. But could not resolve issue. Could any one tell me the specific changes to be made in the code snippet I mentioned
<batch:job id="helloWorldJob">
<batch:step id="step1">
<batch:tasklet>
<batch:chunk reader="cvsFileItemReader"
commit-interval="10">
</batch:chunk>
</batch:tasklet>
</batch:step>
</batch:job>
<bean id="cvsFileItemReader" class="org.springframework.batch.item.file.FlatFileItemReader">
<property name="resource" value="classpath:cvs/input/report.csv" />
<property name="lineMapper">
<bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
<property name="lineTokenizer">
<bean
class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
<property name="names" value="id,sales,qty,staffName,date" />
</bean>
</property>
<property name="fieldSetMapper">
<bean class="com.mkyong.ReportFieldSetMapper" />
<!-- if no data type conversion, use BeanWrapperFieldSetMapper to map by name
<bean
class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
<property name="prototypeBeanName" value="report" />
</bean>
-->
</property>
</bean>
</property>
</bean>
For chunk-based step reader and writer are mandatory.
If you don't want a writer use a No-operation ItemWriter that does nothing.
EDIT:
A no-op implementation is an empty implementation of interface tha does...nothing!
Just let your class implements desiderable inteface(s) with empty methods.
No-op ItemWriter:
public class NoOpItemWriter implements ItemWriter {
void write(java.util.List<? extends T> items) throws java.lang.Exception {
// no-op
}
}
In maven repo you can find the framework "spring-batch-samples".
In this framework you will find this Writer :
org.springframework.batch.sample.support.DummyItemWriter
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