How to generate a custom workflow programmatically

sriramb · June 14, 2022, 7:14am

Hi All,
I am looking for a way to build a workflow from scratch programmatically based on the custom inputs. Is there any service available for custom workflow generation ?

I am using flowable version 6.7.2

Thanks,
Sriram

martin.grofcik · June 14, 2022, 8:51am

Hi,

Can you describe your use case please?

Regards
Martin

sriramb · June 16, 2022, 5:23am

Hi @martin.grofcik ,

My usecase is, I have a UI which gets the workflow details from user. With that user inputs(Say necessary info for a workflow), I have to dynamically generate a workflow and deploy it in flowable engine.

Let me know if this info is sufficient

Regards,
Sriram

martin.grofcik · June 20, 2022, 9:56am

Hi Sriram,

repositoryService.createDeployment.addBpmnModel(....)....

You can create your own bpmn model programatically.

Regards
Martin

anishpr94 · November 15, 2022, 7:30am

is the same thing possible for CMMN?

martin.grofcik · November 16, 2022, 6:16am

yes, it is .

Regards
Martin

anishpr94 · November 16, 2022, 4:50pm

@martin.grofcik
I noticed CMMN builder does not have an add model method?

github.com

flowable/flowable-engine/blob/main/modules/flowable-cmmn-api/src/main/java/org/flowable/cmmn/api/repository/CmmnDeploymentBuilder.java

/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.flowable.cmmn.api.repository;

import java.io.InputStream;
import java.util.zip.ZipInputStream;

import org.flowable.cmmn.api.CmmnRepositoryService;

/**

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Could you please point me to how it can be done?

arthware · November 21, 2022, 10:16am

This should work:

CmmnModel model = /*your programatically created model instance */;
byte[] bytes = new CmmnXmlConverter().convertToXml(model);
cmmnRepositoryService.createDeployment().addBytes("mymodel.cmmn", bytes);

sriramb · December 7, 2022, 9:52am

Hi @martin.grofcik ,

I tried as per your suggestions and it worked.

Adding to this, i have to generate a bpmn workflow (not xml) from scratch starting from adding process, pool, lanes etc… Will Bpmn Model accomadates this too ?