RetroZilla/rdf/tests/rdfpoll/rdfpoll.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
A simple test program that reads in RDF/XML into an in-memory data
source, then periodically updates it. It prints the messages
indicating assert and unassert activity to the console.
The program takes two parameters: the URL from which to read, and
the poll-interval at which to re-load the .
*/
#include <stdlib.h>
#include "nsXPCOM.h"
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsIInputStream.h"
#include "nsIIOService.h"
#include "nsIRDFCompositeDataSource.h"
#include "nsIRDFRemoteDataSource.h"
#include "nsIRDFNode.h"
#include "nsIRDFService.h"
#include "nsIRDFXMLSource.h"
#include "nsIServiceManager.h"
#include "nsIStreamListener.h"
#include "nsIURL.h"
#include "nsRDFCID.h"
#include "nsIComponentManager.h"
#include "nsXPIDLString.h"
#include "prthread.h"
#include "plevent.h"
#include "plstr.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsNetCID.h"
#include "nsCRT.h"
////////////////////////////////////////////////////////////////////////
// CIDs
// rdf
static NS_DEFINE_CID(kRDFXMLDataSourceCID, NS_RDFXMLDATASOURCE_CID);
// xpcom
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
////////////////////////////////////////////////////////////////////////
// IIDs
#include "nsIMemory.h" // for the CID
////////////////////////////////////////////////////////////////////////
class Observer : public nsIRDFObserver
{
public:
Observer();
virtual ~Observer() {}
// nsISupports interface
NS_DECL_ISUPPORTS
// nsIRDFObserver interface
NS_DECL_NSIRDFOBSERVER
};
Observer::Observer()
{
}
NS_IMPL_ISUPPORTS1(Observer, nsIRDFObserver)
static nsresult
rdf_WriteOp(const char* aOp,
nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
nsresult rv;
nsXPIDLCString source;
rv = aSource->GetValue(getter_Copies(source));
if (NS_FAILED(rv)) return rv;
nsXPIDLCString property;
rv = aProperty->GetValue(getter_Copies(property));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIRDFResource> resource;
nsCOMPtr<nsIRDFLiteral> literal;
nsCOMPtr<nsIRDFDate> date;
nsCOMPtr<nsIRDFInt> number;
printf("%.8s [%s]\n", aOp, (const char*) source);
printf(" --[%s]--\n", (const char*) property);
if ((resource = do_QueryInterface(aTarget)) != nsnull) {
nsXPIDLCString target;
rv = resource->GetValue(getter_Copies(target));
if (NS_FAILED(rv)) return rv;
printf(" ->[%s]\n", (const char*) target);
}
else if ((literal = do_QueryInterface(aTarget)) != nsnull) {
nsXPIDLString target;
rv = literal->GetValue(getter_Copies(target));
if (NS_FAILED(rv)) return rv;
char* p = ToNewCString(target);
if (! p)
return NS_ERROR_OUT_OF_MEMORY;
printf(" ->\"%s\"\n", p);
NS_Free(p);
}
else if ((date = do_QueryInterface(aTarget)) != nsnull) {
PRTime value;
date->GetValue(&value);
PRExplodedTime t;
PR_ExplodeTime(value, PR_GMTParameters, &t);
printf(" -> %02d/%02d/%04d %02d:%02d:%02d +%06d\n",
t.tm_month + 1,
t.tm_mday,
t.tm_year,
t.tm_hour,
t.tm_min,
t.tm_sec,
t.tm_usec);
}
else if ((number = do_QueryInterface(aTarget)) != nsnull) {
PRInt32 value;
number->GetValue(&value);
printf(" -> %d\n", value);
}
else {
printf(" -> (unknown node type)\n");
}
printf("\n");
return NS_OK;
}
NS_IMETHODIMP
Observer::OnAssert(nsIRDFDataSource* aDataSource,
nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
return rdf_WriteOp("assert", aSource, aProperty, aTarget);
}
NS_IMETHODIMP
Observer::OnUnassert(nsIRDFDataSource* aDataSource,
nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
return rdf_WriteOp("unassert", aSource, aProperty, aTarget);
}
NS_IMETHODIMP
Observer::OnChange(nsIRDFDataSource* aDataSource,
nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aOldTarget,
nsIRDFNode* aNewTarget)
{
nsresult rv;
rv = rdf_WriteOp("chg-from", aSource, aProperty, aOldTarget);
if (NS_FAILED(rv)) return rv;
rv = rdf_WriteOp("chg-to", aSource, aProperty, aNewTarget);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
NS_IMETHODIMP
Observer::OnMove(nsIRDFDataSource* aDataSource,
nsIRDFResource* aOldSource,
nsIRDFResource* aNewSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
nsresult rv;
rv = rdf_WriteOp("mv-from", aOldSource, aProperty, aTarget);
if (NS_FAILED(rv)) return rv;
rv = rdf_WriteOp("mv-to", aNewSource, aProperty, aTarget);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
NS_IMETHODIMP
Observer::OnBeginUpdateBatch(nsIRDFDataSource* aDataSource)
{
return NS_OK;
}
NS_IMETHODIMP
Observer::OnEndUpdateBatch(nsIRDFDataSource* aDataSource)
{
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
int
main(int argc, char** argv)
{
nsresult rv;
if (argc < 2) {
fprintf(stderr, "usage: %s <url> [<poll-interval>]\n", argv[0]);
return 1;
}
rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
if (NS_FAILED(rv)) {
fprintf(stderr, "NS_InitXPCOM2 failed\n");
return 1;
}
// Get netlib off the floor...
nsCOMPtr<nsIEventQueueService> theEventQueueService =
do_GetService(kEventQueueServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = theEventQueueService->CreateThreadEventQueue();
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create thread event queue");
if (NS_FAILED(rv)) return rv;
// Create a stream data source and initialize it on argv[1], which
// is hopefully a "file:" URL. (Actually, we can do _any_ kind of
// URL, but only a "file:" URL will be written back to disk.)
nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID, &rv);
if (NS_FAILED(rv)) {
NS_ERROR("unable to create RDF/XML data source");
return rv;
}
nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds);
if (! remote)
return NS_ERROR_UNEXPECTED;
rv = remote->Init(argv[1]);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to initialize data source");
if (NS_FAILED(rv)) return rv;
// The do_QI() on the pointer is a hack to make sure that the new
// object gets AddRef()-ed.
nsCOMPtr<nsIRDFObserver> observer = do_QueryInterface(new Observer);
if (! observer)
return NS_ERROR_OUT_OF_MEMORY;
rv = ds->AddObserver(observer);
if (NS_FAILED(rv)) return rv;
while (1) {
// Okay, this should load the XML file...
rv = remote->Refresh(PR_TRUE);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to open datasource");
if (NS_FAILED(rv)) return rv;
if (argc <= 2)
break;
PRInt32 pollinterval = atol(argv[2]);
if (! pollinterval)
break;
PR_Sleep(PR_SecondsToInterval(pollinterval));
}
return NS_OK;
}