public HitSnippet[] GetSnippets(GetSnippetsRequest req)
{
object[] results = this.Invoke("GetSnippets", new object[] {
req
});
return((HitSnippet[])(results[0]));
}
private bool tenHits = false; //Flag to do Prefetch check only every 10 hits
private void PrefetchSnippetsForNetworkHits(BT.TileHitCollection thc)
{
int lastDisplayed = 0;
if (maxDisplayed != 0)
lastDisplayed = thc.LastDisplayed + 1;
//We have cached snippets for network hits upto maxDisplayed
if (lastDisplayed < maxDisplayed)
return;
maxDisplayed = thc.LastDisplayed + 1;
//Do Prefetch check once every ten hits
tenHits = !tenHits;
if (!tenHits)
return;
if (lastDisplayed < thc.NumResults) {
int limit = 0;
ArrayList networkHits = new ArrayList();
if ((thc.NumResults - lastDisplayed) > MAX_HITS_AHEAD)
limit = lastDisplayed + MAX_HITS_AHEAD;
else
limit = thc.NumResults;
ArrayList hits = _rp.hitsCopy;
lock (hits.SyncRoot) {
if (limit > hits.Count)
limit = hits.Count;
log.Debug("PrefetchSnippets: Scanning result set for Network Hits from {0} to {1}", lastDisplayed, limit);
//Get all NetworkHits with snippets field not initialized:
for (int si = lastDisplayed; si < limit ; si++)
{
if ((hits[si] is NetworkHit) && (((NetworkHit)hits[si]).snippet == null))
networkHits.Add((NetworkHit)hits[si]);
}
}
log.Debug("PrefetchSnippets: Found {0} NetworkHits without snippets", networkHits.Count);
while (networkHits.Count > 0) {
ArrayList nwHitsPerNode = new ArrayList();
string hostnamePort = GetHostnamePort((NetworkHit)networkHits[0]);
//Gather NetworkHits from a specific target Networked Beagle
foreach (NetworkHit nh in networkHits)
{
string hnp = GetHostnamePort(nh);
if (hnp == null)
continue;
if (hnp.Equals(hostnamePort)) {
if (nwHitsPerNode.Count < MAX_HIT_IDS_PER_REQ)
nwHitsPerNode.Add(nh);
else
break;
}
}
//Remove NetworkHits for this Networked Beagle
int i = networkHits.Count;
while (--i >= 0) {
string hnp = GetHostnamePort((NetworkHit)networkHits[i]);
if ((hnp == null) || hnp.Equals(hostnamePort))
networkHits.RemoveAt(i);
}
if (nwHitsPerNode.Count > 0)
{
string[] f3 = hostnamePort.Split(':');
if (f3.Length < 2)
{
log.Warn("PrefetchSnippets: Invalid format netBeagle URI in NetworkHit");
continue;
}
BeagleWebService wsp = new BeagleWebService(f3[0], f3[1]);
string searchToken = GetSearchToken((NetworkHit)nwHitsPerNode[0]);
if (searchToken.Equals("beagle")) //Check if it is Older version of Beagle networking
searchToken = null;
if (searchToken != null) {
int[] hitHashCodes = new int [nwHitsPerNode.Count];
for (int j = 0; j < hitHashCodes.Length; j++)
hitHashCodes[j] = ((NetContext) ((NetworkHit)nwHitsPerNode[j]).context).hashCode;
log.Debug("PrefetchSnippets: Invoking GetSnippets on {0} for {1} hits", wsp.Hostname, nwHitsPerNode.Count);
GetSnippetsRequest sreq = new GetSnippetsRequest();
sreq.searchToken = searchToken;
sreq.hitHashCodes = hitHashCodes;
ReqContext2 rc = new ReqContext2(wsp, nwHitsPerNode, thc);
wsp.BeginGetSnippets(sreq, PrefetchSnippetsResponseHandler, rc);
}
//Signal change in TileHitCollection due to addition of snippets:
//_rp.rootTile.HitCollection.ClearSources(null);
}
} //end while
} //end if
}
public System.IAsyncResult BeginGetSnippets(GetSnippetsRequest req, System.AsyncCallback callback, object asyncState)
{
return(this.BeginInvoke("GetSnippets", new object[] {
req
}, callback, asyncState));
}
public System.IAsyncResult BeginGetSnippets(GetSnippetsRequest req, System.AsyncCallback callback, object asyncState) {
return this.BeginInvoke("GetSnippets", new object[] {
req}, callback, asyncState);
}
public HitSnippet[] GetSnippets(GetSnippetsRequest req) {
object[] results = this.Invoke("GetSnippets", new object[] {
req});
return ((HitSnippet[])(results[0]));
}
public HitSnippet[] getSnippets(GetSnippetsRequest req)
{
HitSnippet[] response;
string searchToken = req.searchToken;
int[] hitHashCodes = req.hitHashCodes;
if (!sessionTable.ContainsKey(searchToken)) {
response = new HitSnippet[0];
Logger.Log.Warn("GetSnippets: Invalid Search Token received ");
return response;
}
ArrayList results = ((SessionData)sessionTable[searchToken]).results;
if ((results == null) || (results.Count == 0)) {
response = new HitSnippet[0];
Logger.Log.Warn("GetSnippets: Invalid Search Token received ");
return response;
}
int i = 0;
ArrayList hashCodeList = new ArrayList();
hashCodeList.AddRange(hitHashCodes);
response = new HitSnippet[hitHashCodes.Length];
Logger.Log.Debug("GetSnippets invoked with {0} hitHashCodes", hitHashCodes.Length);
Query query = ((SessionData)sessionTable[searchToken]).query;
lock (results.SyncRoot) {
string snippet = null;
foreach (Hit h in results) {
int hashCode = h.GetHashCode();
if (hashCodeList.Contains(hashCode)) {
hashCodeList.Remove(hashCode);
//Queryable queryable = h.SourceObject as Queryable;
Queryable queryable = QueryDriver.GetQueryable (h.SourceObjectName);
if (queryable == null)
snippet = "ERROR: hit.SourceObject is null, uri=" + h.Uri;
else
snippet = queryable.GetSnippet (ICollection2StringList(query.StemmedText), h);
//GetSnippets always invoked on Target Beagle Node where hits originate:
if (snippet == null)
snippet = "";
HitSnippet hs = new HitSnippet();
hs.hashCode = hashCode;
hs.snippet = snippet.Trim();
response[i++] = hs;
if ((hashCodeList.Count == 0) || (i == hitHashCodes.Length))
return response;
}
} //end foreach
} //end lock
foreach (int hashCode in hashCodeList) {
HitSnippet hs = new HitSnippet();
hs.hashCode = hashCode;
hs.snippet = InvalidHitSnippetError;
response[i++] = hs;
if (i == hitHashCodes.Length)
break;
}
Logger.Log.Warn("GetSnippets invoked some invalid hitIds");
return response;
}
