public void initializeExecution() throws Exception {
// Initialize the Execution Context
ExecutionContextManager ecm = getComponentManager().getInstance(ExecutionContextManager.class);
ExecutionContext ec = new ExecutionContext();
ecm.initialize(ec);
}
/**
* Init provided {@link ExportURLFactory} and add rendered documents to ZIP stream.
*
* @param zos the ZIP output stream.
* @param tempdir the directory where to copy attached files.
* @param urlf the {@link com.xpn.xwiki.web.XWikiURLFactory} used to render the documents.
* @param context the XWiki context.
* @throws XWikiException error when render documents.
* @throws IOException error when render documents.
*/
private void renderDocuments(
ZipOutputStream zos, File tempdir, ExportURLFactory urlf, XWikiContext context)
throws XWikiException, IOException {
ExecutionContextManager ecim = Utils.getComponent(ExecutionContextManager.class);
Execution execution = Utils.getComponent(Execution.class);
VelocityContext oldVelocityContext = (VelocityContext) context.get("vcontext");
try {
XWikiContext renderContext = (XWikiContext) context.clone();
renderContext.put("action", "view");
ExecutionContext ec = new ExecutionContext();
// Bridge with old XWiki Context, required for old code.
ec.setProperty("xwikicontext", renderContext);
ecim.initialize(ec);
// Push a clean new Execution Context since we don't want the main Execution Context to be
// used for
// rendering the HTML pages to export. It's cleaner to isolate it as we do. Note that the new
// Execution Context automatically gets initialized with a new Velocity Context by
// the VelocityRequestInitializer class.
execution.pushContext(ec);
VelocityManager velocityManager = Utils.getComponent(VelocityManager.class);
// At this stage we have a clean Velocity Context
VelocityContext vcontext = velocityManager.getVelocityContext();
urlf.init(this.pages, tempdir, renderContext);
renderContext.setURLFactory(urlf);
for (String pageName : this.pages) {
renderDocument(pageName, zos, renderContext, vcontext);
}
} catch (ExecutionContextException e) {
throw new XWikiException(
XWikiException.MODULE_XWIKI_EXPORT,
XWikiException.ERROR_XWIKI_INIT_FAILED,
"Failed to initialize Execution Context",
e);
} finally {
// We must ensure that the new request we've used is removed so that the current
// thread can continue to use its original Execution Context.
execution.popContext();
context.put("vcontext", oldVelocityContext);
}
}