如果在执行工作流期间发生错误,则会引发异常。如果异常未由工作流自身所捕获(或者如果工作流引发的异常未以其他方式捕获),则工作流将失败,并向用户显示有关异常的信息。要正确处理错误,应该捕获并处理异常。例如,在前面的示例中,尝试在不存在的项目中创建共享资源会导致未捕获的异常。
示例 22 工作流错误处理此示例可以修改以捕获违例错误,并在项目不存在的情况下创建该项目:
var workflow = { name: 'Create share', description: 'Creates a new share in a business unit', parameters: { name: { label: 'Name of new share', type: 'String' }, unit: { label: 'Business unit', type: 'ChooseOne', options: [ 'development', 'finance', 'qa', 'sales' ], optionlabels: [ 'Development', 'Finance', 'Quality Assurance', 'Sales/Administrative' ], } }, execute: function (params) { try { run('shares select ' + params.unit); } catch (err) { if (err.code != EAKSH_ENTITY_BADSELECT) throw (err); /* * We haven't yet created a project that corresponds to * this business unit; create it now. */ run('shares project ' + params.unit); run('commit'); run('shares select ' + params.unit); } run('filesystem ' + params.name); run('commit'); return ('Created new share "' + params.name + '"'); } };