Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>One option is to use a <code>collection-aggregator</code> to act as an accumulator, blocking the final flow action until all the messages have been processed. The trick is that the <code>collection-splitter</code>s will set up a correlation group size that is only good for either the number of lines in the file or the number of columns in the file. But we want to accumulate until all columns of all lines have been processed. The solution consists in computing first this value (ie total number of expected messages) and overriding whatever correlation group size had been calculated the <code>collection-splitter</code>s with the total value.</p> <p>Here is how I've done this (you'll note that I replaced all Groovy snippets with more Mule-3-esque MEL expressions):</p> <pre><code>&lt;file:connector name="inputFileConnector" autoDelete="true" streaming="false" validateConnections="true" fileAge="60000" readFromDirectory="#{systemProperties['user.home']}" /&gt; &lt;flow name="flow1" processingStrategy="synchronous"&gt; &lt;file:inbound-endpoint path="#{systemProperties['user.home']}" responseTimeout="10000" fileAge="100" connector-ref="inputFileConnector"&gt; &lt;file:filename-regex-filter pattern="input.csv" caseSensitive="false" /&gt; &lt;/file:inbound-endpoint&gt; &lt;byte-array-to-string-transformer /&gt; &lt;set-session-variable variableName="expectedMessageCount" value="#[org.mule.util.StringUtils.countMatches(message.payload, '\n') + org.mule.util.StringUtils.countMatches(message.payload, ',') - 1]" /&gt; &lt;expression-transformer expression="#[message.payload.split('\n')]" /&gt; &lt;collection-splitter enableCorrelation="IF_NOT_SET" /&gt; &lt;set-property propertyName="MULE_CORRELATION_GROUP_SIZE" value="#[sessionVars.expectedMessageCount]" /&gt; &lt;choice&gt; &lt;when expression="#[message.payload != 'end']"&gt; &lt;processor-chain&gt; &lt;logger message="." level="INFO" /&gt; &lt;vm:outbound-endpoint path="toFlow2" /&gt; &lt;/processor-chain&gt; &lt;/when&gt; &lt;otherwise&gt; &lt;processor-chain&gt; &lt;logger message="|||| END" level="INFO" /&gt; &lt;/processor-chain&gt; &lt;/otherwise&gt; &lt;/choice&gt; &lt;/flow&gt; &lt;flow name="flow2"&gt; &lt;vm:inbound-endpoint path="toFlow2"/&gt; &lt;expression-transformer expression="#[message.payload.split(',')]" /&gt; &lt;collection-splitter /&gt; &lt;set-property propertyName="MULE_CORRELATION_GROUP_SIZE" value="#[sessionVars.expectedMessageCount]" /&gt; &lt;logger message="|||||| #[message.payload]" level="INFO"/&gt; &lt;vm:outbound-endpoint path="toFinalizer" /&gt; &lt;vm:outbound-endpoint path="toFlow3" /&gt; &lt;/flow&gt; &lt;flow name="finalizer"&gt; &lt;vm:inbound-endpoint path="toFinalizer" /&gt; &lt;collection-aggregator /&gt; &lt;logger message="|||| DONE" level="INFO" /&gt; &lt;/flow&gt; </code></pre> <p>NB. Alternatively, if using a <code>collection-aggregator</code> is an issue because it uses too much memory, you could use an expression component to decrement <code>sessionVars.expectedMessageCount</code> and filter to let a message hit the final message processor when the counter is back to 0.</p>
    singulars
    1. This table or related slice is empty.
    1. POExecute action after all split messages have been processed
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USDavid Dossot
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POExecute action after all split messages have been processed
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. CODavid, thanks again for your quick response. I started to play with your example but trying to use a counter as you suggest, but the problem I'm encountering is that I am not able to modify a session variable inside the secondary flows which I need because I don't know in advance the number of records. I only know it when I get to the footer. Any ideas?
      singulars
      1. PO
      1. USpakman
    2. COCan't you use the same approach I used above to compute `expectedMessageCount`? Also: does the above solution works for you (as it does for me)? If yes, please accept this answer.
      singulars
      1. PO
      1. USDavid Dossot
    3. COYes, your solution works fine. I still have to understand all the details, such as the MULE_CORRELATION_GROUP_SIZE magic property. The problem with the approach, as you said, is that you need to keep all records in memory for the aggregator so I am trying to use the second approach you suggest. The issue is that I can't seem to update a session variable that was set by the master flow.
      singulars
      1. PO
      1. USpakman
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload