public void buttonClick(ClickEvent event) {
RepositoryService repositoryService = ProcessEngines.getDefaultProcessEngine().getRepositoryService();
boolean includeProcessInstances = (Boolean) includeProcessInstancesCheckBox.getValue();
if (suspend) {
repositoryService.suspendProcessDefinitionById(processDefinitionId,
includeProcessInstances, (Date) dateField.getValue());
} else {
repositoryService.activateProcessDefinitionById(processDefinitionId,
includeProcessInstances, (Date) dateField.getValue());
}