【发布时间】：2016-08-08 15:30:37
【问题描述】：
我在下面的代码中得到“无效的线程访问”。我不确定我在哪里写了错误的代码。我编写代码的主要目的是只显示子任务（幕后发生的事情），所以我在方法调用之前添加了子任务。
@Override
public void handleEvent(Event event)
{
if((event.keyCode == SWT.CR || event.keyCode == 13 || event.type == SWT.Selection) && btnAdd.isEnabled())
{
final PreferencesMO permo = new PreferencesMO();
permo.updatePreferences();
permo.updateDocumentNumber();
final ProjectMO pmo = new ProjectMO();
final CoverSheetMO csmo = new CoverSheetMO();
final CommonError cmerror = new CommonError();
final ParameterConfigurationMO pamo = new ParameterConfigurationMO();
final SnippetNew s = new SnippetNew();
final String projName = txtpname.getText();
Display.getDefault().asyncExec(new Runnable()
{
public void run()
{
try
{
new ProgressMonitorDialog(shell).run(true, true, new IRunnableWithProgress() {
@Override
public void run(final IProgressMonitor monitor) throws InvocationTargetException,
InterruptedException
{
monitor.beginTask("Import Data", IProgressMonitor.UNKNOWN);
monitor.subTask("Connecting to databse...");
for(int i=0;i<=100;i++)
{
s.method1(i);
}
//monitor.worked(1);
try { Thread.sleep(2000); } catch (Exception e) { }
monitor.subTask("Analysing Data...");
try { Thread.sleep(2000); } catch (Exception e) { }
if(!projName.equals(""))
{
monitor.subTask("Updating coversheet ...");
try { Thread.sleep(2000); } catch (Exception e) { }
cmerror.updateCoverSheetStatusforNewProject();
monitor.subTask("Inserting Project ...");
try { Thread.sleep(2000); } catch (Exception e) { }
pmo.addProjectManager(projName,"T");
monitor.subTask("Searching Project ID ...");
try { Thread.sleep(2000); } catch (Exception e) { }
String p_id = pmo.searchprojectID(projName);
permo.insertDocumentNumber(p_id);
monitor.subTask("Inserting data into coversheet ...");
try { Thread.sleep(2000); } catch (Exception e) { }
csmo.insertCoversheet(p_id);
pamo.insertParameterConfiguration(p_id);
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().setText("Demo Tool - "+projName);
IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
AuditLogs view = (AuditLogs) page.findView(AuditLogs.ID);
IEditorPart editorPart = page.getActiveEditor();
StackedLambdaChartInput input = new StackedLambdaChartInput();
AnalysisResult_MetricsChartInput metricsinput = new AnalysisResult_MetricsChartInput();
StackedLambdaChart_HorizantalInput stackedhorizantalinput = new StackedLambdaChart_HorizantalInput();
AnalysisResult_Metrics_HorizantalChartInput metricshorizantalinput = new AnalysisResult_Metrics_HorizantalChartInput();
BarChartInput inpuit = new BarChartInput();
BarChart_HorizantalInput barchart_horizantalinput = new BarChart_HorizantalInput();
AuditLogMO auditlog = new AuditLogMO();
monitor.subTask("Fetching audit logs to display ...");
try { Thread.sleep(2000); } catch (Exception e) { }
java.util.List<java.util.List<String>> auditlogs = auditlog.searchAuditLog(null,null);
view.table(auditlogs);
try
{
handlerService.executeCommand(AuditLogView.ID, new Event());
handlerService.executeCommand(ErrorLogView.ID, new Event());
handlerService.executeCommand(DesignHierarchyHandler.ID, new Event());
if(myeditor != null)
{
if(myeditor instanceof CoverSheet)
{
handlerService.executeCommand(CoverSheetHandler.ID, new Event());
}
else if(myeditor instanceof ParameterConfigurations)
{
handlerService.executeCommand(ParameterConfigurationHandler.ID, new Event());
}
}
}
catch (ExecutionException | NotDefinedException | NotEnabledException | PartInitException| NotHandledException e1)
{
e1.printStackTrace();
}
Constant con = new Constant();
con.createNewProject();
}
//shell.close();
monitor.done();
}
});
}
catch (InvocationTargetException | InterruptedException e)
{
e.printStackTrace();
}
}
});
}
}
【问题讨论】：
-
向我们展示堆栈跟踪并指出它是代码中的哪一行。
-
您正试图从后台线程访问 SWT 小部件。这是不可能的。与大多数 UI 工具包一样，SWT 是单线程的，小部件只能从 UI 线程内访问。在您的情况下，请在安排作业之前阅读
txtpname的内容，并将其存储在作业中可访问的某个位置。 -
Greg@ 当我运行它时，直到“分析数据...”。它在 "if(!txtpname.getText().equals(""))" 条件下引发错误。我已经评论了我得到错误的地方。
-
Rüdiger@ 在调用 ProgressMonitorDialog 之前，我已经在读取 txtpname 的内容了。
标签： eclipse-rcp