package org.drools.persistence.processinstance;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.PreUpdate;
import javax.persistence.Transient;
import javax.persistence.Version;
import org.drools.marshalling.impl.InputMarshaller;
import org.drools.marshalling.impl.MarshallerReaderContext;
import org.drools.marshalling.impl.MarshallerWriteContext;
import org.drools.marshalling.impl.OutputMarshaller;
import org.drools.process.instance.WorkItem;
@Entity
public class WorkItemInfo {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long workItemId;
@Version
@Column(name = "OPTLOCK")
private int version;
private String name;
private Date creationDate;
private long processInstanceId;
private long state;
private @Lob
byte[] workItemByteArray;
private @Transient
WorkItem workItem;
protected WorkItemInfo() {
}
public WorkItemInfo(WorkItem workItem) {
this.workItem = workItem;
this.name = workItem.getName();
this.creationDate = new Date();
this.processInstanceId = workItem.getProcessInstanceId();
}
public long getId() {
return workItemId;
}
public int getVersion() {
return this.version;
}
public String getName() {
return name;
}
public Date getCreationDate() {
return creationDate;
}
public long getProcessInstanceId() {
return processInstanceId;
}
public long getState() {
return state;
}
public WorkItem getWorkItem() {
if ( workItem == null ) {
try {
ByteArrayInputStream bais = new ByteArrayInputStream( workItemByteArray );
MarshallerReaderContext context = new MarshallerReaderContext( bais,
null,
null,
null );
workItem = InputMarshaller.readWorkItem( context );
context.close();
} catch ( IOException e ) {
e.printStackTrace();
throw new IllegalArgumentException( "IOException while loading process instance: " + e.getMessage() );
}
}
return workItem;
}
@PreUpdate
public void update() {
this.state = workItem.getState();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
MarshallerWriteContext context = new MarshallerWriteContext( baos,
null,
null,
null,
null );
OutputMarshaller.writeWorkItem( context,
workItem );
context.close();
this.workItemByteArray = baos.toByteArray();
} catch ( IOException e ) {
throw new IllegalArgumentException( "IOException while storing workItem " + workItem.getId() + ": " + e.getMessage() );
}
}
}