你好StackOverflow社区，
要求：我需要有关如何创建Liferay（LR）模块的建议和帮助，该模块将创建XLS文件，其中包含从数据库中提取的信息，并在整个数据库的预定时间内将它们存储到文档库（DL）中的文件夹位置周。
解决方案：我解决了使用LR的Service Builder + DL + Quartz Scheduler + Apache POI的问题。代码如下。
包版：receive（）方法需要一个RenderRequest对象，以便可以创建ThemeDisplay和ServiceContext对象，DLAppServiceUtil将使用该对象在DL中创建文件。如何创建RenderRequest对象？
@Override
public void receive(Message message) throws MessageListenerException {
_log.debug(">> receive()");
ThemeDisplay themeDisplay = (ThemeDisplay) renderRequest.getAttribute(WebKeys.THEME_DISPLAY);
fileUploadByApp("folder-1", themeDisplay, renderRequest);
_log.debug("<< receive()");
}
public void fileUploadByApp(String folderName, ThemeDisplay themeDisplay, RenderRequest renderRequest) {
try {
File file = new File("D:/liferay-portal-6.2-ce-ga6/temp/sample_" + getDateTimeBasedFilename() + ".txt");
Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "utf-8"));
writer.write("Something");
writer.close();
long repositoryId = themeDisplay.getScopeGroupId();
String mimeType = MimeTypesUtil.getContentType(file);
String title = file.getName();
String description = "This file is added via programatically";
String changeLog = "hi";
Long parentFolderId = DLFolderConstants.DEFAULT_PARENT_FOLDER_ID;
Folder folder = DLAppServiceUtil.getFolder(themeDisplay.getScopeGroupId(), parentFolderId, folderName);
ServiceContext serviceContext = ServiceContextFactory.getInstance(DLFileEntry.class.getName(),
renderRequest);
InputStream is = new FileInputStream(file);
DLAppServiceUtil.addFileEntry(repositoryId, folder.getFolderId(), file.getName(), mimeType, title,
description, changeLog, is, file.length(), serviceContext);
} catch (Exception e) {
System.out.println("Exception");
e.printStackTrace();
}
}
首先，方法receive不需要RenderRequest对象，但你的方法fileUploadByApp。如果你仔细研究你的方法，你需要的所有ThemeDisplay都是scopeGroupId。正如您所提到的，RenderRequest对象是创建ServiceContext所必需的，但您至少有2个解决方案。
ServletContextPool获取一些实例（如果可能的话）。在第二种情况下，您可以设置您需要的，但我认为您只需要设置scopeGroupId，它将按您的意愿工作。
变更示例：
@Override
public void receive(Message message) throws MessageListenerException {
_log.debug(">> receive()");
ServiceContext serviceContext = new ServiceContext();
serviceContext.setScopeGroupId(YOUR_SCOPE_GROUP_ID); //For example YOUR_SCOPE_GROUP_ID can be received from message.
fileUploadByApp("folder-1", serviceContext);
_log.debug("<< receive()");
}
public void fileUploadByApp(String folderName, ServiceContext serviceContext) {
try {
File file = new File("D:/liferay-portal-6.2-ce-ga6/temp/sample_" + getDateTimeBasedFilename() + ".txt");
Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "utf-8"));
writer.write("Something");
writer.close();
long repositoryId = serviceContext.getScopeGroupId();
String mimeType = MimeTypesUtil.getContentType(file);
String title = file.getName();
String description = "This file is added via programatically";
String changeLog = "hi";
Long parentFolderId = DLFolderConstants.DEFAULT_PARENT_FOLDER_ID;
Folder folder = DLAppServiceUtil.getFolder(serviceContext.getScopeGroupId(), parentFolderId, folderName);
InputStream is = new FileInputStream(file);
DLAppServiceUtil.addFileEntry(repositoryId, folder.getFolderId(), file.getName(), mimeType, title,
description, changeLog, is, file.length(), serviceContext);
} catch (Exception e) {
System.out.println("Exception");
e.printStackTrace();
}
}
谢谢你。提供的代码有助于加入点。除了您提供的代码段之外，我还使用了以下解决方案。
// Repository ID of the document library, figured is out by the output from
// _log.debug("repositoryId: " + repositoryId);
// in
// fileUploadByApp(folderName, themeDisplay, renderRequest).
// I found the entry in 'ddmcontent' table of LR's default DB
private long siteARepoId = ?????;
// Found this in 'company' table of LR's default DB
private long LRCompanyId = ?????;
private String sAdminRole = "Administrator";
@Override
public void receive(Message message) throws MessageListenerException {
_log.debug(">> receive()");
ServiceContext serviceContext = new ServiceContext();
serviceContext.setScopeGroupId(siteARepoId);
fileUploadByApp(DLFolderLocation, serviceContext);
_log.debug("<< receive()");
}
public void fileUploadByApp(String folderName, ServiceContext serviceContext) {
_log.debug(">> fileUploadByApp(folderName, serviceContext)");
try {
File file = new File(LRTempLocation + "excel_" + getDateTimeBasedFilename() + ".xlsx");
createExcel(file);
long repositoryId = serviceContext.getScopeGroupId();
String mimeType = MimeTypesUtil.getContentType(file);
String title = file.getName();
String description = "This file is added via programatically";
String changeLog = "hi";
Long parentFolderId = DLFolderConstants.DEFAULT_PARENT_FOLDER_ID;
_log.debug("repositoryId: " + repositoryId);
_log.debug("fileName: " + file.getName());
_log.debug("mimeType: " + mimeType);
_log.debug("title: " + title);
_log.debug("description: " + description);
_log.debug("changeLog: " + changeLog);
_log.debug("fileLength: " + file.length());
_log.debug("serviceContext: " + serviceContext);
Folder folder = DLAppLocalServiceUtil.getFolder(repositoryId, parentFolderId, folderName);
_log.debug("folderId: " + folder.getFolderId());
InputStream is = new FileInputStream(file);
_log.debug("inputStream: " + is);
// Initializing PermissionChecker, without the below the exception
// occurs
// Caused by: com.liferay.portal.security.auth.PrincipalException:
// PermissionChecker not initialized
// Source:
// http://www.open.gr/blog/2014/05/permissionchecker-not-initialised-scheduler-job
Company companyqq = CompanyLocalServiceUtil.getCompanyById(LRCompanyId);
Role adminRole = RoleLocalServiceUtil.getRole(companyqq.getCompanyId(), sAdminRole);
List<User> adminUsers = UserLocalServiceUtil.getRoleUsers(adminRole.getRoleId());
PrincipalThreadLocal.setName(adminUsers.get(0).getUserId());
PermissionChecker permissionChecker = PermissionCheckerFactoryUtil.create(adminUsers.get(0), true);
PermissionThreadLocal.setPermissionChecker(permissionChecker);
// Adding the file entry to the Document Library
DLAppServiceUtil.addFileEntry(repositoryId, folder.getFolderId(), file.getName(), mimeType, title,
description, changeLog, is, file.length(), serviceContext);
} catch (Exception e) {
System.out.println("Exception");
e.printStackTrace();
}
_log.debug("<< fileUploadByApp(folderName, serviceContext)");
}