@Override
public void process(TransactionBase tx, Bytes row, Column col) throws Exception {
TypedTransactionBase ttx = FluoConstants.TYPEL.wrap(tx);
String nextJson = ttx.get().row(row).col(FluoConstants.PAGE_NEW_COL).toString("");
if (nextJson.isEmpty()) {
log.error("An empty page was set at row {} col {}", row.toString(), col.toString());
return;
}
Gson gson = new Gson();
Page nextPage;
if (nextJson.equals("delete")) {
ttx.mutate().row(row).col(FluoConstants.PAGE_CUR_COL).delete();
nextPage = Page.EMPTY;
} else {
ttx.mutate().row(row).col(FluoConstants.PAGE_CUR_COL).set(nextJson);
nextPage = gson.fromJson(nextJson, Page.class);
}
String curJson = ttx.get().row(row).col(FluoConstants.PAGE_CUR_COL).toString("");
Set<Page.Link> curLinks = Collections.emptySet();
if (!curJson.isEmpty()) {
Page curPage = gson.fromJson(curJson, Page.class);
curLinks = curPage.getOutboundLinks();
} else {
Long score = ttx.get().row(row).col(FluoConstants.PAGE_SCORE_COL).toLong(0);
ttx.mutate().row(row).col(FluoConstants.PAGE_SCORE_COL).set(score + 1);
}
Set<Page.Link> nextLinks = nextPage.getOutboundLinks();
String pageUri = row.toString().substring(2);
Sets.SetView<Page.Link> addLinks = Sets.difference(nextLinks, curLinks);
for (Page.Link link : addLinks) {
String r = "p:" + link.getUri();
ttx.mutate()
.row(r)
.fam(FluoConstants.INLINKS_UPDATE)
.qual(pageUri)
.set("add," + link.getAnchorText());
ttx.mutate().row(r).col(FluoConstants.INLINKS_CHG_NTFY).weaklyNotify();
}
Sets.SetView<Page.Link> delLinks = Sets.difference(curLinks, nextLinks);
for (Page.Link link : delLinks) {
String r = "p:" + link.getUri();
ttx.mutate().row(r).fam(FluoConstants.INLINKS_UPDATE).qual(pageUri).set("del");
ttx.mutate().row(r).col(FluoConstants.INLINKS_CHG_NTFY).weaklyNotify();
}
// clean up
ttx.mutate().row(row).col(FluoConstants.PAGE_NEW_COL).delete();
}
@Test
public void testBasic() {
Page page = new Page("http://example.com");
Assert.assertEquals(new Long(0), page.getNumOutbound());
page.addOutboundLink("http://test1.com", "test1");
Assert.assertEquals(new Long(1), page.getNumOutbound());
page.addOutboundLink("http://test2.com", "test2");
Assert.assertEquals(new Long(2), page.getNumOutbound());
page.addOutboundLink("http://test2.com", "test1234");
Assert.assertEquals(new Long(2), page.getNumOutbound());
Gson gson = new Gson();
String json = gson.toJson(page);
Assert.assertNotNull(json);
Assert.assertFalse(json.isEmpty());
Page after = gson.fromJson(json, Page.class);
Assert.assertEquals(page.getUrl(), after.getUrl());
Assert.assertEquals(page.getOutboundLinks().size(), after.getOutboundLinks().size());
}
