扩展Activiti 5.12轻松搞定流程实例跟随流程版本一起升级
扩展Activiti 5.12轻松搞定流程实例跟随流程版本一起升级，本文详细介绍之
本功能依托于bboss 3.6.2分支和Activiti 5.12.0版本。
为activiti组件org.activiti.engine.repository.DeploymentBuilder增加以下接口方法：
Deployment deploy(int deploypolicy);
参数deploypolicy为int类型，用来指定流程部署策略，有三个值：
DeploymentBuilder.Deploy_policy_default
DeploymentBuilder.Deploy_policy_upgrade
DeploymentBuilder.Deploy_policy_delete
这三个值作为常量定义在部署接口org.activiti.engine.repository.DeploymentBuilder中。他们的含义分别为：
DeploymentBuilder.Deploy_policy_default 没有执行完毕的旧版本实例任务仍然根据旧版本流程定义运行
DeploymentBuilder.Deploy_policy_upgrade 没有执行完毕的旧版本实例任务迁移到新版本流程定义运行
DeploymentBuilder.Deploy_policy_delete 直接取消没有执行完毕的旧版本实例任务
原来的部署接口方法任然保留：
Deployment deploy();
以下是两个简单的使用扩展接口部署流程示例：
public Deployment deployProcDefByZip(String deploymentName,ZipInputStream processDef,int upgradepolicy) {DeploymentBuilder deploymentBuilder = processEngine.getRepositoryService().createDeployment().name(deploymentName);deploymentBuilder.addZipInputStream(processDef);/** * 参数upgradepolicy可以为以下常量值： * DeploymentBuilder.Deploy_policy_default *DeploymentBuilder.Deploy_policy_upgrade * DeploymentBuilder.Deploy_policy_delete * */return deploymentBuilder.deploy(upgradepolicy);}public Deployment deployProcDefByPath(String deploymentName,String xmlPath, String jpgPath,int deploypolicy) {Deployment deploy = null;/** * 参数deploypolicy可以为以下常量值： * DeploymentBuilder.Deploy_policy_default *DeploymentBuilder.Deploy_policy_upgrade * DeploymentBuilder.Deploy_policy_delete * */if(jpgPath != null && !jpgPath.equals("")){deploy = repositoryService.createDeployment().name(deploymentName).addClasspathResource(xmlPath).addClasspathResource(jpgPath).deploy(deploypolicy);}else{deploy = repositoryService.createDeployment().name(deploymentName).addClasspathResource(xmlPath).deploy(deploypolicy);}return deploy;}