Extending behaviour of activiti

jansi — Fri, 02 Sep 2016 17:24:14 GMT

Hi,I am trying to extend behaviour of Activiti in a Spring based activiti application. So created interface extending your interface. For eg: MyRepositoryService extends RepositoryService{}.And also created implementation class extending your corresponding implementation class. For eg:MyRepositorySe

Re: Extending behaviour of activiti

jbarrez — Mon, 05 Sep 2016 16:59:20 GMT

Can't really see it in the XML,but did you inject your new service into the ProcessEngineConfiguration?

Re: Extending behaviour of activiti

jansi — Tue, 06 Sep 2016 05:44:24 GMT

Hi,

Thanks for responding. Please see attached XML configuration.

Re: Extending behaviour of activiti

jansi — Tue, 06 Sep 2016 06:42:17 GMT

Hi,
I created Java configuration file too.

<java>
package com.fingress.workflow.configuration;

import javax.sql.DataSource;

import org.activiti.engine.impl.cfg.CommandExecutorImpl;
import org.activiti.engine.impl.interceptor.CommandExecutor;
import org.activiti.spring.ProcessEngineFactoryBean;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.transaction.PlatformTransactionManager;

import com.fingress.workflow.api.FgRepositoryService;
import com.fingress.workflow.api.impl.FgRepositoryServiceImpl;

@Configuration
@ComponentScan(basePackages = {"com.fingress.workflow.*"})
public class WorkflowConfiguration {

protected Resource[] processResources() {
 return new Resource[] { new ClassPathResource("processes/*.bpmn20.xml") };
 }

 protected String databaseUrl() {
 return "jdbc:h2:tcp://localhost/~/activiti_example4";
 }

 @Bean
 public DataSource activitiDataSource() {
 DriverManagerDataSource dataSource = new DriverManagerDataSource();
 dataSource.setDriverClassName("com.mysql.jdbc.Driver");
 dataSource.setUrl("jdbc:mysql://localhost:3306/fingresstest");
 dataSource.setUsername("root");
 dataSource.setPassword("password");
 return dataSource;
 }

 @Bean
 public DataSource dataSource() {
 return new TransactionAwareDataSourceProxy(activitiDataSource());
 }

 @Bean
 public PlatformTransactionManager platformTransactionManager() {
 return new DataSourceTransactionManager(this.dataSource());
 }

 @Bean
public FgRepositoryService repositoryService(){
 return new FgRepositoryServiceImpl();
}



 @Bean
 public ProcessEngineFactoryBean processEngineFactoryBean() {
 ProcessEngineFactoryBean pe = new ProcessEngineFactoryBean();
 SpringProcessEngineConfiguration processEngineConfiguration = new SpringProcessEngineConfiguration();

 processEngineConfiguration.setDataSource(this.dataSource());
 processEngineConfiguration.setTransactionManager(this.platformTransactionManager());
 processEngineConfiguration.setDatabaseSchemaUpdate(SpringProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
 processEngineConfiguration.setRepositoryService(this.repositoryService());
 Resource[] resources = processResources();
 // processEngineConfiguration.setDeploymentResources(resources);
 pe.setProcessEngineConfiguration(processEngineConfiguration);
 return pe;
 }
}
</java>

When i try to call deploy() method, it is giving null pointer exception for commandexecutor. This is happening only when deploy() is called from MyRepositoryService. When activiti repositoryservice deploy method is called it works fine.

Mu MyrepositoryService extends RepositoryServiceImpl

Re: Extending behaviour of activiti

jbarrez — Thu, 08 Sep 2016 09:50:57 GMT

You need to inject your service into the processEngineConfiguration bean too.

Re: Extending behaviour of activiti

jansi — Fri, 09 Sep 2016 09:27:49 GMT

Hi,
I did inject as shown below. But still got the same error.

<java>
public SpringProcessEngineConfiguration springProcessEngineConfiguration() {
SpringProcessEngineConfiguration processEngineConfiguration = new SpringProcessEngineConfiguration();
processEngineConfiguration.setDataSource(this.dataSource());
processEngineConfiguration.setTransactionManager(this.platformTransactionManager());
processEngineConfiguration.setDatabaseSchemaUpdate(SpringProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
processEngineConfiguration.setRepositoryService(this.repositoryService());
</java>

<java>
@Bean
public FgRepositoryService repositoryService(){
return new FgRepositoryServiceImpl();
}
</java>

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