How to fix java.lang.ClassNotFoundException: org.springframework.batch.classify.BackToBackPatternClassifier

Question

I get error stated in Title using following job conifuration file with ClassifierCompositItemWriter. Why is it not finding BackToBackPatternClassifier? I'm really new to this.

I'm using - Spring-core version 3.2.2.RELEASE - Spring batch version 2.2.0.RELEASE

<bean id="domain" class="com.my.OneData" />

<job id="readAsString" xmlns="http://www.springframework.org/schema/batch">
    <step id="step1">
        <tasklet>
            <chunk reader="theItemReader" writer="compositeWriter"
                commit-interval="1" />
        </tasklet>
    </step>
</job>

<bean id="theItemReader" class="org.springframework.batch.item.file.FlatFileItemReader">
    <property name="resource" value="file:csv/inputs/ad_usage_sample.csv" />
    <property name="linesToSkip" value="1"></property>
    <property name="lineMapper">
        <bean
            class="org.springframework.batch.item.file.mapping.PassThroughLineMapper">
        </bean>
    </property>
</bean>

<bean id="compositeWriter"
    class="org.springframework.batch.item.support.ClassifierCompositeItemWriter">
    <property name="classifier">
        <bean
            class="org.springframework.batch.classify.BackToBackPatternClassifier">
            <property name="routerDelegate">
                <bean class="com.my.LineClassifier" />
            </property>
            <property name="matcherMap">
                <map>
                    <entry key="abc" value-ref="fileItemWriter1" />
                    <entry key="xyz" value-ref="fileItemWriter2" />
                </map>
            </property>
        </bean>
    </property>
</bean>

<bean id="fileItemWriter1" class="org.springframework.batch.item.file.FlatFileItemWriter">
    <property name="resource" value="file:csv/outputs/oneLouderOutput3.csv" />
    <property name="appendAllowed" value="true" />
    <property name="lineAggregator">
        <bean
    class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
            <property name="delimiter" value="," />
        </bean>
    </property>
</bean>

<bean id="fileItemWriter2" class="org.springframework.batch.item.file.FlatFileItemWriter">
    <property name="resource" value="file:csv/outputs/oneLouderOutput3.csv" />
    <property name="appendAllowed" value="true" />
    <property name="lineAggregator">
        <bean
    class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
            <property name="delimiter" value="," />
        </bean>
    </property>
</bean>

Ron Tuffin · Accepted Answer · 2014-04-24 07:12:51Z

4

I just had a similar problem and found that I had to change the package of the Classifier from

org.springframework.batch.classify.BackToBackPatternClassifier

to

org.springframework.classify.BackToBackPatternClassifier

i.e. remove the batch

I am also using spring-retry-1.0.3.RELEASE.jar

answered Apr 24, 2014 at 7:12

Ron Tuffin

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1 Comment

sandeep Over a year ago

this should fix it. here is dependency for spring retry <dependency> <groupId>org.springframework.retry</groupId> <artifactId>spring-retry</artifactId> <version>1.0.3.RELEASE</version> </dependency>

Luca Basso Ricci · Accepted Answer · 2013-10-03 21:30:54Z

1

BackToBackPatternClassifier (and Classifier) is defined is spring-retry module and probably you need to include its jar in your classpath (I can't check now, but latest version is spring-retry-1.0.2.RELEASE)

answered Oct 3, 2013 at 21:30

Luca Basso Ricci

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