rdf/tests/rdfpoll/rdfpoll.cpp

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
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  15  * The Original Code is mozilla.org code.
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  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Pierre Phaneuf <pp@ludusdesign.com>
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 /*
  40
  41   A simple test program that reads in RDF/XML into an in-memory data
  42   source, then periodically updates it. It prints the messages
  43   indicating assert and unassert activity to the console.
  44
  45   The program takes two parameters: the URL from which to read, and
  46   the poll-interval at which to re-load the .
  47
  48  */
  49
  50 #include <stdlib.h>
  51 #include <stdio.h>
  52 #include "nsXPCOM.h"
  53 #include "nsCOMPtr.h"
  54 #include "nsIInputStream.h"
  55 #include "nsIIOService.h"
  56 #include "nsIRDFCompositeDataSource.h"
  57 #include "nsIRDFRemoteDataSource.h"
  58 #include "nsIRDFNode.h"
  59 #include "nsIRDFService.h"
  60 #include "nsIRDFXMLSource.h"
  61 #include "nsIServiceManager.h"
  62 #include "nsServiceManagerUtils.h"
  63 #include "nsIStreamListener.h"
  64 #include "nsIURL.h"
  65 #include "nsRDFCID.h"
  66 #include "nsIComponentManager.h"
  67 #include "nsComponentManagerUtils.h"
  68 #include "nsThreadUtils.h"
  69 #include "prthread.h"
  70 #include "plstr.h"
  71 #include "nsEmbedString.h"
  72 #include "nsNetCID.h"
  73
  74 ////////////////////////////////////////////////////////////////////////
  75 // CIDs
  76
  77 // rdf
  78 static NS_DEFINE_CID(kRDFXMLDataSourceCID,  NS_RDFXMLDATASOURCE_CID);
  79
  80 ////////////////////////////////////////////////////////////////////////
  81 // IIDs
  82
  83
  84 #include "nsIMemory.h" // for the CID
  85
  86 ////////////////////////////////////////////////////////////////////////
  87
  88 class Observer : public nsIRDFObserver
  89 {
  90 public:
  91     Observer();
  92     virtual ~Observer() {}
  93
  94     // nsISupports interface
  95     NS_DECL_ISUPPORTS
  96
  97     // nsIRDFObserver interface
  98     NS_DECL_NSIRDFOBSERVER
  99 };
 100
 101 Observer::Observer()
 102 {
 103 }
 104
 105 NS_IMPL_ISUPPORTS1(Observer, nsIRDFObserver)
 106
 107 static nsresult
 108 rdf_WriteOp(const char* aOp,
 109             nsIRDFResource* aSource,
 110             nsIRDFResource* aProperty,
 111             nsIRDFNode* aTarget)
 112 {
 113     nsresult rv;
 114
 115     nsCString source;
 116     rv = aSource->GetValue(getter_Copies(source));
 117     if (NS_FAILED(rv)) return rv;
 118
 119     nsCString property;
 120     rv = aProperty->GetValue(getter_Copies(property));
 121     if (NS_FAILED(rv)) return rv;
 122
 123     nsCOMPtr<nsIRDFResource> resource;
 124     nsCOMPtr<nsIRDFLiteral> literal;
 125     nsCOMPtr<nsIRDFDate> date;
 126     nsCOMPtr<nsIRDFInt> number;
 127
 128     printf("%.8s [%s]\n", aOp, source.get());
 129     printf("       --[%s]--\n", property.get());
 130
 131     if ((resource = do_QueryInterface(aTarget)) != nsnull) {
 132         nsCString target;
 133         rv = resource->GetValue(getter_Copies(target));
 134         if (NS_FAILED(rv)) return rv;
 135
 136         printf("       ->[%s]\n", target.get());
 137     }
 138     else if ((literal = do_QueryInterface(aTarget)) != nsnull) {
 139         nsString target;
 140         rv = literal->GetValue(getter_Copies(target));
 141         if (NS_FAILED(rv)) return rv;
 142
 143         printf("       ->\"%s\"\n", NS_ConvertUTF16toUTF8(target).get());
 144     }
 145     else if ((date = do_QueryInterface(aTarget)) != nsnull) {
 146         PRTime value;
 147         date->GetValue(&value);
 148
 149         PRExplodedTime t;
 150         PR_ExplodeTime(value, PR_GMTParameters, &t);
 151
 152         printf("       -> %02d/%02d/%04d %02d:%02d:%02d +%06d\n",
 153                t.tm_month + 1,
 154                t.tm_mday,
 155                t.tm_year,
 156                t.tm_hour,
 157                t.tm_min,
 158                t.tm_sec,
 159                t.tm_usec);
 160     }
 161     else if ((number = do_QueryInterface(aTarget)) != nsnull) {
 162         PRInt32 value;
 163         number->GetValue(&value);
 164
 165         printf("       -> %d\n", value);
 166     }
 167     else {
 168         printf("       -> (unknown node type)\n");
 169     }
 170
 171     printf("\n");
 172     return NS_OK;
 173 }
 174
 175 NS_IMETHODIMP
 176 Observer::OnAssert(nsIRDFDataSource* aDataSource,
 177                    nsIRDFResource* aSource,
 178                    nsIRDFResource* aProperty,
 179                    nsIRDFNode* aTarget)
 180 {
 181     return rdf_WriteOp("assert", aSource, aProperty, aTarget);
 182 }
 183
 184
 185 NS_IMETHODIMP
 186 Observer::OnUnassert(nsIRDFDataSource* aDataSource,
 187                      nsIRDFResource* aSource,
 188                      nsIRDFResource* aProperty,
 189                      nsIRDFNode* aTarget)
 190 {
 191     return rdf_WriteOp("unassert", aSource, aProperty, aTarget);
 192 }
 193
 194
 195 NS_IMETHODIMP
 196 Observer::OnChange(nsIRDFDataSource* aDataSource,
 197                    nsIRDFResource* aSource,
 198                    nsIRDFResource* aProperty,
 199                    nsIRDFNode* aOldTarget,
 200                    nsIRDFNode* aNewTarget)
 201 {
 202     nsresult rv;
 203     rv = rdf_WriteOp("chg-from", aSource, aProperty, aOldTarget);
 204     if (NS_FAILED(rv)) return rv;
 205
 206     rv = rdf_WriteOp("chg-to", aSource, aProperty, aNewTarget);
 207     if (NS_FAILED(rv)) return rv;
 208
 209     return NS_OK;
 210 }
 211
 212 NS_IMETHODIMP
 213 Observer::OnMove(nsIRDFDataSource* aDataSource,
 214                  nsIRDFResource* aOldSource,
 215                  nsIRDFResource* aNewSource,
 216                  nsIRDFResource* aProperty,
 217                  nsIRDFNode* aTarget)
 218 {
 219     nsresult rv;
 220     rv = rdf_WriteOp("mv-from", aOldSource, aProperty, aTarget);
 221     if (NS_FAILED(rv)) return rv;
 222
 223     rv = rdf_WriteOp("mv-to", aNewSource, aProperty, aTarget);
 224     if (NS_FAILED(rv)) return rv;
 225
 226     return NS_OK;
 227 }
 228
 229 NS_IMETHODIMP
 230 Observer::OnBeginUpdateBatch(nsIRDFDataSource* aDataSource)
 231 {
 232     return NS_OK;
 233 }
 234
 235 NS_IMETHODIMP
 236 Observer::OnEndUpdateBatch(nsIRDFDataSource* aDataSource)
 237 {
 238     return NS_OK;
 239 }
 240
 241 ////////////////////////////////////////////////////////////////////////
 242
 243 int
 244 main(int argc, char** argv)
 245 {
 246     nsresult rv;
 247
 248     if (argc < 2) {
 249         fprintf(stderr, "usage: %s <url> [<poll-interval>]\n", argv[0]);
 250         return 1;
 251     }
 252
 253     rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
 254     if (NS_FAILED(rv)) {
 255         fprintf(stderr, "NS_InitXPCOM2 failed\n");
 256         return 1;
 257     }
 258
 259     // Create a stream data source and initialize it on argv[1], which
 260     // is hopefully a "file:" URL. (Actually, we can do _any_ kind of
 261     // URL, but only a "file:" URL will be written back to disk.)
 262     nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID, &rv);
 263     if (NS_FAILED(rv)) {
 264         NS_ERROR("unable to create RDF/XML data source");
 265         return rv;
 266     }
 267
 268     nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds);
 269     if (! remote)
 270         return NS_ERROR_UNEXPECTED;
 271
 272     rv = remote->Init(argv[1]);
 273     NS_ASSERTION(NS_SUCCEEDED(rv), "unable to initialize data source");
 274     if (NS_FAILED(rv)) return rv;
 275
 276     // The do_QI() on the pointer is a hack to make sure that the new
 277     // object gets AddRef()-ed.
 278     nsCOMPtr<nsIRDFObserver> observer = do_QueryInterface(new Observer);
 279     if (! observer)
 280         return NS_ERROR_OUT_OF_MEMORY;
 281
 282     rv = ds->AddObserver(observer);
 283     if (NS_FAILED(rv)) return rv;
 284
 285     while (1) {
 286         // Okay, this should load the XML file...
 287         rv = remote->Refresh(PR_TRUE);
 288         NS_ASSERTION(NS_SUCCEEDED(rv), "unable to open datasource");
 289         if (NS_FAILED(rv)) return rv;
 290
 291         if (argc <= 2)
 292             break;
 293
 294         PRInt32 pollinterval = atol(argv[2]);
 295         if (! pollinterval)
 296             break;
 297
 298         PR_Sleep(PR_SecondsToInterval(pollinterval));
 299     }
 300
 301     return NS_OK;
 302 }