public Tweet getTweet(String tweetid) {
Map<String, String> map = cassandra.listColumns(tweetid, TWEETS, false);
return new Tweet(
tweetid.getBytes(),
map.get("uname"),
map.get("body"),
map.get("timestamp") == null ? null : Long.parseLong(map.get("timestamp")));
}
private Timeline getLine(
String COL_FAM, String uname, String startkey, int count, final boolean reversed) {
Map<String, String> map = cassandra.listColumns(uname, COL_FAM, startkey, count, reversed);
if (null == map || 0 == map.size()) {
return null;
}
List<String> tweetids = ImmutableList.<String>copyOf(map.values());
List<Tweet> tweets = getTweetsForTweetids(tweetids);
return new Timeline(tweets, Long.valueOf(String.valueOf(getLast(map.keySet(), 0))));
/*
* Selector selector = makeSel(); List<Column> timeline; byte[]
* longTypeStartKey = (startkey.equals("") ? new byte[0] :
* NumberHelper.toBytes(Long.parseLong(startkey))); try { timeline =
* selector.getColumnsFromRow(uname, COL_FAM,
* Selector.newColumnsPredicate(longTypeStartKey,new
* byte[0],true,count+1), RCL); } catch (Exception e) {
* log.error("Unable to retrieve timeline for uname: " + uname); return
* null; } Long mintimestamp = null; if (timeline.size() > count) {
* //find min timestamp mintimestamp = Long.MAX_VALUE; Column removeme =
* timeline.get(0); //This cannot fail. Count is 0+, and size is thus
* 1+. Only needed for initialization. for (Column c : timeline) { long
* ctime = ByteBuffer.wrap(c.name).getLong(); if (ctime < mintimestamp)
* { mintimestamp = ctime; removeme = c; } } //eject column from list
* after saving the timestamp timeline.remove(removeme); }
* ArrayList<String> tweetids = new ArrayList<String>(timeline.size());
* for (Column c : timeline) { tweetids.add(bToS(c.value)); }
* Map<String, List<Column>> unordered_tweets = Collections.emptyMap();
* try { unordered_tweets = selector.getColumnsFromRows(tweetids,
* TWEETS, SPall(), RCL); } catch (Exception e) {
* log.error("Unable to retrieve tweets from timeline for uname: " +
* uname); return null; } //Order the tweets by the ordered tweetids
* ArrayList<Tweet> ordered_tweets = new
* ArrayList<Tweet>(tweetids.size()); for (String tweetid : tweetids) {
* ordered_tweets
* .add(makeTweet(tweetid.getBytes(),unordered_tweets.get(tweetid))); }
* return new Timeline(ordered_tweets, mintimestamp);
*/
// return null;
}
// Helpers
private List<String> getFriendOrFollowerUnames(String COL_FAM, String uname, int count) {
Map<String, String> map = cassandra.listColumns(uname, COL_FAM, null, count, false);
return ImmutableList.<String>copyOf(map.keySet());
}
