Spring/spring-batch
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

BATCH-1261: Update "Passing data to future steps" to include retrieval

Browse Source
This commit is contained in:
dhgarrette
2009-06-01 17:49:19 +00:00
parent 8a717bc82f
commit fb0f17cc83
1 changed files with 35 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
src/site/docbook/reference/common-patterns.xml
View File

@@ -537,13 +537,14 @@
during <classname>Step</classname> execution and if the
<classname>Step</classname> fails, that data will be lost.</para>
<programlisting>public void MyItemWriter implements ItemWriter&lt;Object&gt; {
<programlisting>public void SavingItemWriter implements ItemWriter&lt;Object&gt; {
private StepExecution stepExecution;
public void write(List&lt;? extends Object&gt; items) throws Exception {
// ...
this.stepExecution.getExecutionContext().put("someKey", someObject);
ExecutionContext stepContext = this.stepExecution.getExecutionContext();
stepContext.put("someKey", someObject);
}
@BeforeStep
@@ -564,22 +565,41 @@
listeners, it must be registered on the
<classname>Step</classname>.</para>
<programlisting>&lt;step id="step1"&gt;
&lt;tasket&gt;
&lt;chunk reader="reader" writer="writer" commit-interval="10"/&gt;
&lt;listeners&gt;
&lt;listener ref="promotionListener"/&gt;
&lt;/listeners&gt;
&lt;/tasklet&gt;
&lt;/step&gt;
<programlisting>&lt;job id="job1"&gt;
&lt;step id="step1"&gt;
&lt;tasket&gt;
&lt;chunk reader="reader" writer="savingWriter" commit-interval="10"/&gt;
&lt;listeners&gt;
<emphasis role="bold">&lt;listener ref="promotionListener"/&gt;</emphasis>
&lt;/listeners&gt;
&lt;/tasklet&gt;
&lt;/step&gt;
&lt;step id="step2"&gt;
...
&lt;/step&gt;
&lt;step id="step2"&gt;
...
&lt;/step&gt;
&lt;/job&gt;
&lt;beans:bean id="promotionListener"
<emphasis role="bold">&lt;beans:bean id="promotionListener"
class="org.spr....ExecutionContextPromotionListener"&gt;
&lt;beans:property name="keys" value="someKey"/&gt;
&lt;/beans:bean&gt;</programlisting>
&lt;/beans:bean&gt;</emphasis></programlisting>
<para>Finally, to the saved values must be retrieved from the
<classname>Job</classname> <classname>ExeuctionContext</classname>:</para>
<programlisting>public void RetrievingItemWriter implements ItemWriter&lt;Object&gt; {
private Object someObject;
public void write(List&lt;? extends Object&gt; items) throws Exception {
// ...
}
@BeforeStep
public void saveStepExecution(StepExecution stepExecution) {
ExecutionContext jobContext = stepExecution.getJobExecution().getExecutionContext();
this.someObject = jobContext.get("someKey");
}
}</programlisting>
</section>
</chapter>