How to personalize the name of output file

[springo]

Hello,

i want to personaliez the name of outputfile writer using the current date:
for example
the writer is :

<bean id="writer" class="org.springframework.batch.item.file.FlatFil eItemWriter">
<property name="resource" ref= "${output_file_name}date_execution_batch" />
<property name="shouldDeleteIfExists" value="true" />
<property name="fieldSetCreator">
<bean class="org.springframework.batch.item.file.mapping .PassThroughFieldSetMapper"/>
</property>
</bean>


in properties file:
output_file_name=file://temp/myfile


any issues??
thanks

[DHGarrette]

In Spring Batch 1.x you can use the StepExecutionResourceProxy [1] to extract the date from the jobParameters. For this to work you have to register the proxy as a listener on the step.

<property name="resource" ref="fileLocator" />

<bean id="fileLocator" class="org.springframework.batch.core.resource.StepExecutionResourceProxy">
    <property name="filePattern" value="file://temp/myfile%schedule.date%.txt"/>
</bean>

In Spring Batch 2.0 you will be able to use the late-binding feature to say something like:

<property name="resource" value="file://temp/myfile#{jobParameters[schedule.date]}.txt" />

[1] http://static.springframework.org/sp...urceProxy.html

[springo]

In Spring Batch 1.x you can use the StepExecutionResourceProxy [1] to extract the date from the jobParameters. For this to work you have to register the proxy as a listener on the step.

<property name="resource" ref="fileLocator" />

<bean id="fileLocator" class="org.springframework.batch.core.resource.StepExecutionResourceProxy">
    <property name="filePattern" value="file://temp/myfile%schedule.date%.txt"/>
</bean>

In Spring Batch 2.0 you will be able to use the late-binding feature to say something like:

<property name="resource" value="file://temp/myfile#{jobParameters[schedule.date]}.txt" />

[1] http://static.springframework.org/sp...urceProxy.html

Thanks.
i have to specify in the name of result file to parameters: the first one is the current date, the other is a parameter passing during the execution of batch.
so i add this bloc of code in context.xml :
1: in job

<property name="listeners" >
<list>
<ref ean="outputFile"/>
</list>
</property>

2: in writer

<bean id="writer" class="org.springframework.batch.item.file.FlatFil eItemWriter">
<property name="resource" ref= "outputFile" />
<property name="shouldDeleteIfExists" value="true" />
<property name="fieldSetCreator">
<bean class="org.springframework.batch.item.file.mapping .PassThroughFieldSetMapper"/>
</property>
</bean>

3: the bean outputfile

<bean id="outputFile" class="org.springframework.batch.core.resource.Ste pExecutionResourceProxy" >
<property name="filePattern" value="${file-name}%param1%${param_date_batch}#%datebatch%}${fil e_extension}" />
</bean>

4: adding param in properties file:
param_date_batch,file_extension and file-name

i executed the batch . the result i get thevar "param1" with the correct value, but i don't know how to give to datebatch a value during execution.
should i implements a another class where can i specify paramdate.
i also want to modify the value of "param2" beforing using it in the name of result file.

thks for your help

[hailspring]

Why dont you have a step listener and inject the writer into it? Then in before step you can set the resource to whatever name you want. Somethinglike this:

File outputFile = new File("dynamicFileName");
writer.setResource(new FileSystemResource(outputFile));

[DHGarrette]

hailspring,

I think the downside to the way you've described is that it moves the specification of the filename out from the config file and into a Java class.

[DHGarrette]

i executed the batch . the result i get thevar "param1" with the correct value, but i don't know how to give to datebatch a value during execution.
should i implements a another class where can i specify paramdate.
i also want to modify the value of "param2" beforing using it in the name of result file.

springo,

I'm a little confused. How exactly are you entering the job parameters? Is it on the command line? Or programmatically in Java code?

[springo]

hailspring,
I use a propeties file (contain a list of parameter) where i specify the prefix and path of output file.

DHGarrette,

for the first parameter , i enter it in command line.
for example ./mybatch.sh param1

and in the context file:

i specify a listener :

<property name="listeners" >
<list>
<ref bean="stepExecution"/>
<ref bean="executionListener"/>
<ref bean="outputFile"/>
</list>

and

<bean id="stepExecution" class="org.springframework.batch.core.resource.Ste pExecutionPreparedStatementSetter">
<property name="parameterKeys">
<list>
<value>param1</value>
</list>
</property>
</bean>

<bean id="outputFile" class="org.springframework.batch.core.resource.Ste pExecutionResourceProxy" >
<property name="filePattern" value="${file-name}%param1%${param_date_batch}#%datebatch%}${fil e_extension}" />
</bean>

so :
- param1 is defined in command line
- file-name,fil e_extension are defined in properties file
- datebatch : where can i define it?

i want to modify the value of param1 before using it.




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