Passing custom variables types to a process

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

jean-sébastien

Hello,

I try to set a custom variable type to Activiti. My code is defined as such :


In a JavaService task I do the following:

public void execute(DelegateExecution execution) throws Exception {
execution.setVariable("firstResultIterator", this.firstResultIterator);
}‍‍‍‍

I got the following exception:

org.activiti.engine.ActivitiException: couldn't find type for net.atos.wlp.tool.archive.batch.FirstResultIterator@1f9cdda
   at org.activiti.engine.impl.variable.DefaultVariableTypes.findVariableType(DefaultVariableTypes.java:62)
   at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.createVariableLocal(VariableScopeImpl.java:212)
   at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.setVariable(VariableScopeImpl.java:164)
   at net.atos.wlp.tool.archiving.ArchiveMI.execute(ArchiveMI.java:36)

The firstResultIterator is defined as such:

package net.atos.wlp.tool.archive.batch;

import java.util.Iterator;

public class FirstResultIterator implements Iterable<Integer>, Iterator<Integer> {
    private static final Logger logger = Logger.getLogger(FirstResultIterator.class);

    private int batchSize = 0;
    private int defaultBatchSize = 50; //SPOPV-4381
    int startNumber = 0;
    private AtomicBoolean hasNext = new AtomicBoolean(true);

    public Iterator<Integer> iterator() {
        return this;
    }

    public boolean hasNext() {
        return hasNext.get();
    }

    public Integer next() {
        int result = startNumber;
        startNumber += batchSize;
        return result;
    }

    public void remove() {
        throw new UnsupportedOperationException("remove");
    }

    /**
     * @param hasNext
     *            the hasNext to set
     */
    public void setHasNext(boolean hasNext) {
        this.hasNext.set(hasNext);
    }

    /**
     * @return the bATCH_SIZE
     */
    public int getBatchSize() {
        return batchSize;
    }

    /**
     * @param size
     *            the bATCH_SIZE to set
     */
    public void setBatchSize(int size) {
        if (size > 0)
            batchSize = size;
        else
            batchSize=defaultBatchSize;
        
        if (logger.isInfoEnabled())
           logger.info("BatchSize set to:" + batchSize);
    }
    
   public void setDefaultBatchSize(int size) {
        if (size > 0)
            defaultBatchSize = 50; //SPOPV-4381

        if (logger.isInfoEnabled())
           logger.info("defaultBatchSize set to:" + defaultBatchSize);
    }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

How to set a custom variable type ?

Many thanks !

lichtin

From "the book":

When you use a Java bean as a process variable make sure the bean implements the Serializable interface, because the process variable will be persisted to the Activiti engine database.