Creating a Process Instance with Java

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zlatan316

Hi all,

I have a linux server setup with activiti that we use to create bpmn process via Activiti Explorer.
I am trying to write a class that will create an activiti process through code, and is runnable as a JAR on the server. Here is what i have so far:

   public static void spawnBPMNProcess() {
      System.out.println("Started spawnBPMNProcess()");
      Authentication.setAuthenticatedUserId("admin");
      ProcessEngine processEngine = ProcessEngineConfiguration
            .createStandaloneProcessEngineConfiguration()
            .buildProcessEngine(); 
      RepositoryService repositoryService = processEngine.getRepositoryService();
      RuntimeService runtimeService = processEngine.getRuntimeService();
      IdentityService identityService = processEngine.getIdentityService();
      System.out.println("Referencing BPMN diagram to launch…");
      repositoryService.createDeployment()
            .addClasspathResource("liveprocess.bpmn20.xml")
            .deploy();
      Map<String, Object> variableMap = new HashMap<String, Object>();
      variableMap.put("clientString", "test_ACP");
      
      identityService.setAuthenticatedUserId("admin");
      
      System.out.println("Launching process…");
      ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("variableMap", variableMap);
      System.out.println("Process Definition ID: " + processInstance.getProcessDefinitionId());
      System.out.println("Activiti ID: " + processInstance.getActivityId());
      System.out.println("Launch complete!");
   }
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This code however gives me the below errors:
——————–
java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: org.h2.Driver
——————–
Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: java.sql.SQLException: No suitable driver found for jdbc:h2:tcp://localhost/activiti
### The error may exist in org/activiti/db/mapping/entity/Property.xml
### The error may involve org.activiti.engine.impl.persistence.entity.PropertyEntity.selectDbSchemaVersion
### The error occurred while executing a query
### Cause: java.sql.SQLException: No suitable driver found for jdbc:h2:tcp://localhost/activiti
——————–

This seems to indicate I need to reference the database that exists on the server, how can i resolve this issue?

With Thanks.

balsarori

Hi,

Seems that your code is missing JDBC driver jar for H2 database.

Do you plan to run the code inside the Activiti Explorer webapp or as a separate Java application?