Question

我将jBPM集成为我的应用程序中的内部工作流执行引擎。我想用两种方式在jBPM中使用slf4j（在引擎盖下运行log4j2）记录器。

我想将它用作审核日志。我知道jBPM可以提供audit logging through a specific JPA configuration，但是在我的情况下这不方便，我想使用特定的slf4j配置。
我想在jBPM工作流程的入门脚本等中使用它，例如编写logger.trace("Variable a value:"+a.getValue());

jBPM中是否存在这样的日志记录集成机制？

Answer 1

我解决了我的问题，因此在这里提供答案，以便它也可以对其他人有用......

我自己使用events mechanism provided by the jBPM实现了自定义审核日志机制。更具体地说，在我处理工作流开始的类中，我添加了一个事件监听器，它会收到每个工作流操作的通知，并将其记录到我的自定义slf4j记录器中（参见下一个代码片段）：

ksession.addEventListener(new DefaultProcessEventListener() {
    public void beforeProcessStarted(ProcessStartedEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'beforeProcessStarted'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId());
    }

    public void afterProcessStarted(ProcessStartedEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'afterProcessStarted'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId());
    }

    public void beforeProcessCompleted(ProcessCompletedEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'beforeProcessCompleted'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId());
    }

    public void afterProcessCompleted(ProcessCompletedEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'afterProcessCompleted'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId());
    }

    public void beforeNodeTriggered(ProcessNodeTriggeredEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        NodeInstance node = event.getNodeInstance();
        logger.trace("jBPM event 'beforeNodeTriggered'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId() + ", Node instance ID: " + node.getId() + ", Node ID: "
                + node.getNodeId() + ", Node name: " + node.getNodeName());

    }

    public void afterNodeTriggered(ProcessNodeTriggeredEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        NodeInstance node = event.getNodeInstance();
        logger.trace("jBPM event 'afterNodeTriggered'. Process ID: " + process.getId()
                + ", Process definition ID: " + process.getProcessId() + ", Process name: "
                + process.getProcessName() + ", Process state: " + process.getState() + ", Parent process ID: "
                + process.getParentProcessInstanceId() + ", Node instance ID: " + node.getId() + ", Node ID: "
                + node.getNodeId() + ", Node name: " + node.getNodeName());

    }

    public void beforeNodeLeft(ProcessNodeLeftEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        NodeInstance node = event.getNodeInstance();
        logger.trace("jBPM event 'beforeNodeLeft'. Process ID: " + process.getId() + ", Process definition ID: "
                + process.getProcessId() + ", Process name: " + process.getProcessName() + ", Process state: "
                + process.getState() + ", Parent process ID: " + process.getParentProcessInstanceId()
                + ", Node instance ID: " + node.getId() + ", Node ID: " + node.getNodeId() + ", Node name: "
                + node.getNodeName());

    }

    public void afterNodeLeft(ProcessNodeLeftEvent event) {
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        NodeInstance node = event.getNodeInstance();
        logger.trace("jBPM event 'afterNodeLeft'. Process ID: " + process.getId() + ", Process definition ID: "
                + process.getProcessId() + ", Process name: " + process.getProcessName() + ", Process state: "
                + process.getState() + ", Parent process ID: " + process.getParentProcessInstanceId()
                + ", Node instance ID: " + node.getId() + ", Node ID: " + node.getNodeId() + ", Node name: "
                + node.getNodeName());

    }

    public void beforeVariableChanged(ProcessVariableChangedEvent event){
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'beforeVariableChanged'. Process ID: " + process.getId() + ", Process definition ID: "
                + process.getProcessId() + ", Process name: " + process.getProcessName() + ", Process state: "
                + process.getState() + ", Parent process ID: " + process.getParentProcessInstanceId()
                + ", Variable ID: " + event.getVariableId() + ", Variable instance ID: " + event.getVariableInstanceId() + ", Old value: "
                + (event.getOldValue() == null ? "null" : event.getOldValue().toString())+ ", New value: "+(event.getNewValue() == null ? "null" : event.getNewValue().toString()));
    }

    public void afterVariableChanged(ProcessVariableChangedEvent event){
        WorkflowProcessInstance process = (WorkflowProcessInstance) event.getProcessInstance();
        logger.trace("jBPM event 'afterVariableChanged'. Process ID: " + process.getId() + ", Process definition ID: "
                + process.getProcessId() + ", Process name: " + process.getProcessName() + ", Process state: "
                + process.getState() + ", Parent process ID: " + process.getParentProcessInstanceId()
                + ", Variable ID: " + event.getVariableId() + ", Variable instance ID: " + event.getVariableInstanceId() + ", Old value: "
                + (event.getOldValue() == null ? "null" : event.getOldValue().toString())+ ", New value: "+(event.getNewValue() == null ? "null" : event.getNewValue().toString()));
    }

});

实际上我决定避免在工作流的BPMN定义中使用java logger，但我想我可以通过在每个工作流中传递logger对象作为参数并在我的脚本中使用它来实现BPMN2内的任务。这是我现在能想到的唯一工作。
```
Logger logger = LoggerFactory.getLogger("logger name");
Map<String, Object> arguments = new HashMap<String, Object>();
arguments.put("logger", logger);
ProcessInstance processInstance = ksession.startProcess("processName", arguments);
```

Answer 2

要在JBPM的脚本任务中使用记录器，请按照以下步骤操作：

1.在log.xml文件

中创建记录器名称

<Logger name="com.jbpm.log"  level="DEBUG"> 
<appender-ref ref="consoleAppender" />
</Logger>

使用完整的类名来获取记录器的实例。

org.slf4j.Logger logger = null; logger = org.slf4j.LoggerFactory.getLogger("com.jbpm.log"); logger.info("Logger:: Test!!");
如果没有添加，请添加slf4j jar。

jBPM和日志记录

2 个答案: