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// search.java
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// (C) 2004 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
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//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
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//
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// LICENSE
//
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// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// You must compile this file with
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// javac -classpath .:../../Classes search.java
// if the shell's current path is htroot/yacy
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import java.util.ArrayList ;
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import java.util.HashMap ;
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import java.util.Iterator ;
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import java.util.Map ;
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import java.util.Set ;
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import java.util.TreeSet ;
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import de.anomic.http.httpHeader ;
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import de.anomic.kelondro.kelondroBase64Order ;
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import de.anomic.kelondro.kelondroBitfield ;
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import de.anomic.index.indexContainer ;
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import de.anomic.net.natLib ;
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import de.anomic.plasma.plasmaSearchEvent ;
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import de.anomic.plasma.plasmaSearchQuery ;
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import de.anomic.plasma.plasmaSearchRankingProfile ;
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import de.anomic.plasma.plasmaSearchProcessing ;
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import de.anomic.plasma.plasmaSwitchboard ;
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import de.anomic.server.serverCore ;
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import de.anomic.server.serverObjects ;
import de.anomic.server.serverSwitch ;
import de.anomic.yacy.yacyCore ;
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import de.anomic.yacy.yacyNetwork ;
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import de.anomic.yacy.yacySeed ;
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import de.anomic.tools.crypt ;
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public final class search {
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public static serverObjects respond ( httpHeader header , serverObjects post , serverSwitch env ) {
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// return variable that accumulates replacements
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final plasmaSwitchboard sb = ( plasmaSwitchboard ) env ;
serverObjects prop = new serverObjects ( ) ;
if ( ( post = = null ) | | ( env = = null ) ) return prop ;
if ( ! yacyNetwork . authentifyRequest ( post , env ) ) return prop ;
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//System.out.println("yacy: search received request = " + post.toString());
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final String oseed = post . get ( " myseed " , " " ) ; // complete seed of the requesting peer
// final String youare = post.get("youare", ""); // seed hash of the target peer, used for testing network stability
final String key = post . get ( " key " , " " ) ; // transmission key for response
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final String query = post . get ( " query " , " " ) ; // a string of word hashes that shall be searched and combined
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final String exclude = post . get ( " exclude " , " " ) ; // a string of word hashes that shall not be within the search result
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String urls = post . get ( " urls " , " " ) ; // a string of url hashes that are preselected for the search: no other may be returned
String abstracts = post . get ( " abstracts " , " " ) ; // a string of word hashes for abstracts that shall be generated, or 'auto' (for maxcount-word), or '' (for none)
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// final String fwdep = post.get("fwdep", ""); // forward depth. if "0" then peer may NOT ask another peer for more results
// final String fwden = post.get("fwden", ""); // forward deny, a list of seed hashes. They may NOT be target of forward hopping
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final long duetime = Math . min ( 60000 , post . getLong ( " duetime " , 3000 ) ) ;
final int count = Math . min ( 100 , post . getInt ( " count " , 10 ) ) ; // maximum number of wanted results
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final int maxdist = post . getInt ( " maxdist " , Integer . MAX_VALUE ) ;
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final String prefer = post . get ( " prefer " , " " ) ;
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final String contentdom = post . get ( " contentdom " , " text " ) ;
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final String filter = post . get ( " filter " , " .* " ) ;
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final int partitions = post . getInt ( " partitions " , 30 ) ;
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String profile = post . get ( " profile " , " " ) ; // remote profile hand-over
if ( profile . length ( ) > 0 ) profile = crypt . simpleDecode ( profile , null ) ;
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//final boolean includesnippet = post.get("includesnippet", "false").equals("true");
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final kelondroBitfield constraint = new kelondroBitfield ( 4 , post . get ( " constraint " , " ______ " ) ) ;
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// final boolean global = ((String) post.get("resource", "global")).equals("global"); // if true, then result may consist of answers from other peers
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// Date remoteTime = yacyCore.parseUniversalDate((String) post.get(yacySeed.MYTIME)); // read remote time
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// test:
// http://localhost:8080/yacy/search.html?query=4galTpdpDM5Q (search for linux)
// http://localhost:8080/yacy/search.html?query=gh8DKIhGKXws (search for book)
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// http://localhost:8080/yacy/search.html?query=UEhMGfGv2vOE (search for kernel)
// http://localhost:8080/yacy/search.html?query=ZX-LjaYo74PP (search for help)
// http://localhost:8080/yacy/search.html?query=uDqIalxDfM2a (search for mail)
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// http://localhost:8080/yacy/search.html?query=4galTpdpDM5Qgh8DKIhGKXws&abstracts=auto (search for linux and book, generate abstract automatically)
// http://localhost:8080/yacy/search.html?query=&abstracts=4galTpdpDM5Q (only abstracts for linux)
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if ( ( sb . isRobinsonMode ( ) ) & &
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( ! ( ( sb . isPublicRobinson ( ) ) | |
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( sb . isInMyCluster ( ( String ) header . get ( httpHeader . CONNECTION_PROP_CLIENTIP ) ) ) ) ) ) {
// if we are a robinson cluster, answer only if this client is known by our network definition
prop . putASIS ( " links " , " " ) ;
prop . putASIS ( " linkcount " , " 0 " ) ;
prop . putASIS ( " references " , " " ) ;
return prop ;
}
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// tell all threads to do nothing for a specific time
sb . intermissionAllThreads ( 2 * duetime ) ;
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TreeSet abstractSet = ( ( abstracts . length ( ) = = 0 ) | | ( abstracts . equals ( " auto " ) ) ) ? null : plasmaSearchQuery . hashes2Set ( abstracts ) ;
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// store accessing peer
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if ( yacyCore . seedDB = = null ) {
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yacyCore . log . logSevere ( " yacy.search: seed cache not initialized " ) ;
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} else {
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yacyCore . peerActions . peerArrival ( yacySeed . genRemoteSeed ( oseed , key , true ) , true ) ;
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}
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// prepare search
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final TreeSet queryhashes = plasmaSearchQuery . hashes2Set ( query ) ;
final TreeSet excludehashes = ( exclude . length ( ) = = 0 ) ? new TreeSet ( kelondroBase64Order . enhancedCoder ) : plasmaSearchQuery . hashes2Set ( exclude ) ;
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final long timestamp = System . currentTimeMillis ( ) ;
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// prepare an abstract result
StringBuffer indexabstract = new StringBuffer ( ) ;
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int indexabstractContainercount = 0 ;
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int joincount = 0 ;
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plasmaSearchQuery theQuery = null ;
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plasmaSearchProcessing localProcess = null ;
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ArrayList accu = null ;
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if ( ( query . length ( ) = = 0 ) & & ( abstractSet ! = null ) ) {
// this is _not_ a normal search, only a request for index abstracts
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theQuery = new plasmaSearchQuery ( null , abstractSet , new TreeSet ( kelondroBase64Order . enhancedCoder ) , maxdist , prefer , plasmaSearchQuery . contentdomParser ( contentdom ) , false , count , 0 , duetime , filter , plasmaSearchQuery . SEARCHDOM_LOCAL , null , - 1 , plasmaSearchQuery . catchall_constraint ) ;
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theQuery . domType = plasmaSearchQuery . SEARCHDOM_LOCAL ;
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yacyCore . log . logInfo ( " INIT HASH SEARCH (abstracts only): " + plasmaSearchQuery . anonymizedQueryHashes ( theQuery . queryHashes ) + " - " + theQuery . displayResults ( ) + " links " ) ;
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// prepare a search profile
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localProcess = new plasmaSearchProcessing ( theQuery . maximumTime , theQuery . displayResults ( ) ) ;
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//theSearch = new plasmaSearchEvent(squery, rankingProfile, localTiming, remoteTiming, true, sb.wordIndex, null);
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Map [ ] containers = localProcess . localSearchContainers ( theQuery , sb . wordIndex , plasmaSearchQuery . hashes2Set ( urls ) ) ;
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if ( containers ! = null ) {
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Iterator ci = containers [ 0 ] . entrySet ( ) . iterator ( ) ;
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Map . Entry entry ;
String wordhash ;
while ( ci . hasNext ( ) ) {
entry = ( Map . Entry ) ci . next ( ) ;
wordhash = ( String ) entry . getKey ( ) ;
indexContainer container = ( indexContainer ) entry . getValue ( ) ;
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indexabstractContainercount + = container . size ( ) ;
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indexabstract . append ( " indexabstract. " + wordhash + " = " ) . append ( plasmaSearchProcessing . compressIndex ( container , null , 1000 ) . toString ( ) ) . append ( serverCore . crlfString ) ;
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}
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}
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prop . putASIS ( " indexcount " , " " ) ;
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prop . put ( " joincount " , 0 ) ;
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prop . putASIS ( " references " , " " ) ;
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} else {
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// retrieve index containers from search request
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theQuery = new plasmaSearchQuery ( null , queryhashes , excludehashes , maxdist , prefer , plasmaSearchQuery . contentdomParser ( contentdom ) , false , count , 0 , duetime , filter , plasmaSearchQuery . SEARCHDOM_LOCAL , null , - 1 , constraint ) ;
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theQuery . domType = plasmaSearchQuery . SEARCHDOM_LOCAL ;
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yacyCore . log . logInfo ( " INIT HASH SEARCH (query- " + abstracts + " ): " + plasmaSearchQuery . anonymizedQueryHashes ( theQuery . queryHashes ) + " - " + theQuery . displayResults ( ) + " links " ) ;
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// prepare a search profile
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plasmaSearchRankingProfile rankingProfile = ( profile . length ( ) = = 0 ) ? new plasmaSearchRankingProfile ( plasmaSearchQuery . contentdomParser ( contentdom ) ) : new plasmaSearchRankingProfile ( " " , profile ) ;
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localProcess = new plasmaSearchProcessing ( theQuery . maximumTime , theQuery . displayResults ( ) ) ;
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plasmaSearchEvent theSearch = plasmaSearchEvent . getEvent ( theQuery , rankingProfile , localProcess , sb . wordIndex , null , true , abstractSet ) ;
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// set statistic details of search result and find best result index set
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if ( theSearch . getLocalCount ( ) = = 0 ) {
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prop . putASIS ( " indexcount " , " " ) ;
prop . putASIS ( " joincount " , " 0 " ) ;
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} else {
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// attach information about index abstracts
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StringBuffer indexcount = new StringBuffer ( ) ;
Map . Entry entry ;
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Iterator i = theSearch . IACount . entrySet ( ) . iterator ( ) ;
while ( i . hasNext ( ) ) {
entry = ( Map . Entry ) i . next ( ) ;
indexcount . append ( " indexcount. " ) . append ( ( String ) entry . getKey ( ) ) . append ( '=' ) . append ( ( ( Integer ) entry . getValue ( ) ) . toString ( ) ) . append ( serverCore . crlfString ) ;
}
if ( abstractSet ! = null ) {
// if a specific index-abstract is demanded, attach it here
i = abstractSet . iterator ( ) ;
String wordhash ;
while ( i . hasNext ( ) ) {
wordhash = ( String ) i . next ( ) ;
indexabstractContainercount + = ( ( Integer ) theSearch . IACount . get ( wordhash ) ) . intValue ( ) ;
indexabstract . append ( " indexabstract. " + wordhash + " = " ) . append ( ( String ) theSearch . IAResults . get ( wordhash ) ) . append ( serverCore . crlfString ) ;
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}
}
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prop . putASIS ( " indexcount " , new String ( indexcount ) ) ;
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if ( theSearch . getLocalCount ( ) = = 0 ) {
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joincount = 0 ;
prop . put ( " joincount " , 0 ) ;
} else {
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joincount = theSearch . getLocalCount ( ) ;
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prop . putASIS ( " joincount " , Integer . toString ( joincount ) ) ;
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accu = theSearch . completeResults ( duetime ) ;
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}
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// generate compressed index for maxcounthash
// this is not needed if the search is restricted to specific
// urls, because it is a re-search
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if ( ( theSearch . IAmaxcounthash = = null ) | | ( urls . length ( ) ! = 0 ) | | ( queryhashes . size ( ) < = 1 ) | | ( abstracts . length ( ) = = 0 ) ) {
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prop . putASIS ( " indexabstract " , " " ) ;
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} else if ( abstracts . equals ( " auto " ) ) {
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// automatically attach the index abstract for the index that has the most references. This should be our target dht position
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indexabstractContainercount + = ( ( Integer ) theSearch . IACount . get ( theSearch . IAmaxcounthash ) ) . intValue ( ) ;
indexabstract . append ( " indexabstract. " + theSearch . IAmaxcounthash + " = " ) . append ( ( String ) theSearch . IAResults . get ( theSearch . IAmaxcounthash ) ) . append ( serverCore . crlfString ) ;
if ( ( theSearch . IAneardhthash ! = null ) & & ( ! ( theSearch . IAneardhthash . equals ( theSearch . IAmaxcounthash ) ) ) ) {
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// in case that the neardhthash is different from the maxcounthash attach also the neardhthash-container
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indexabstractContainercount + = ( ( Integer ) theSearch . IACount . get ( theSearch . IAneardhthash ) ) . intValue ( ) ;
indexabstract . append ( " indexabstract. " + theSearch . IAneardhthash + " = " ) . append ( ( String ) theSearch . IAResults . get ( theSearch . IAneardhthash ) ) . append ( serverCore . crlfString ) ;
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}
//System.out.println("DEBUG-ABSTRACTGENERATION: maxcounthash = " + maxcounthash);
//System.out.println("DEBUG-ABSTRACTGENERATION: neardhthash = "+ neardhthash);
//yacyCore.log.logFine("DEBUG HASH SEARCH: " + indexabstract);
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}
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}
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if ( partitions > 0 ) sb . requestedQueries = sb . requestedQueries + 1d / ( double ) partitions ; // increase query counter
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// prepare reference hints
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localProcess . startTimer ( ) ;
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Set ws = theSearch . references ( 10 ) ;
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StringBuffer refstr = new StringBuffer ( ) ;
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Iterator j = ws . iterator ( ) ;
while ( j . hasNext ( ) ) {
refstr . append ( " , " ) . append ( ( String ) j . next ( ) ) ;
}
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prop . putASIS ( " references " , ( refstr . length ( ) > 0 ) ? refstr . substring ( 1 ) : new String ( refstr ) ) ;
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localProcess . yield ( " reference collection " , ws . size ( ) ) ;
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}
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prop . putASIS ( " indexabstract " , new String ( indexabstract ) ) ;
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// prepare result
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if ( ( joincount = = 0 ) | | ( accu = = null ) ) {
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// no results
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prop . putASIS ( " links " , " " ) ;
prop . putASIS ( " linkcount " , " 0 " ) ;
prop . putASIS ( " references " , " " ) ;
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} else {
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// result is a List of urlEntry elements
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localProcess . startTimer ( ) ;
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StringBuffer links = new StringBuffer ( ) ;
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String resource = null ;
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plasmaSearchEvent . ResultEntry entry ;
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for ( int i = 0 ; i < accu . size ( ) ; i + + ) {
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entry = ( plasmaSearchEvent . ResultEntry ) accu . get ( i ) ;
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resource = entry . resource ( ) ;
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if ( resource ! = null ) {
links . append ( " resource " ) . append ( i ) . append ( '=' ) . append ( resource ) . append ( serverCore . crlfString ) ;
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}
}
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prop . putASIS ( " links " , new String ( links ) ) ;
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prop . put ( " linkcount " , accu . size ( ) ) ;
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localProcess . yield ( " result list preparation " , accu . size ( ) ) ;
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}
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// add information about forward peers
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prop . putASIS ( " fwhop " , " " ) ; // hops (depth) of forwards that had been performed to construct this result
prop . putASIS ( " fwsrc " , " " ) ; // peers that helped to construct this result
prop . putASIS ( " fwrec " , " " ) ; // peers that would have helped to construct this result (recommendations)
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// prepare search statistics
Long trackerHandle = new Long ( System . currentTimeMillis ( ) ) ;
HashMap searchProfile = theQuery . resultProfile ( joincount , System . currentTimeMillis ( ) - timestamp ) ;
String client = ( String ) header . get ( " CLIENTIP " ) ;
searchProfile . put ( " host " , client ) ;
yacySeed remotepeer = yacyCore . seedDB . lookupByIP ( natLib . getInetAddress ( client ) , true , false , false ) ;
searchProfile . put ( " peername " , ( remotepeer = = null ) ? " unknown " : remotepeer . getName ( ) ) ;
searchProfile . put ( " time " , trackerHandle ) ;
sb . remoteSearches . add ( searchProfile ) ;
TreeSet handles = ( TreeSet ) sb . remoteSearchTracker . get ( client ) ;
if ( handles = = null ) handles = new TreeSet ( ) ;
handles . add ( trackerHandle ) ;
sb . remoteSearchTracker . put ( client , handles ) ;
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// log
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yacyCore . log . logInfo ( " EXIT HASH SEARCH: " +
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plasmaSearchQuery . anonymizedQueryHashes ( theQuery . queryHashes ) + " - " + joincount + " links found, " +
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prop . get ( " linkcount " , " ? " ) + " links selected, " +
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indexabstractContainercount + " index abstracts, " +
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( System . currentTimeMillis ( ) - timestamp ) + " milliseconds " ) ;
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prop . putASIS ( " searchtime " , Long . toString ( System . currentTimeMillis ( ) - timestamp ) ) ;
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final int links = Integer . parseInt ( prop . get ( " linkcount " , " 0 " ) ) ;
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yacyCore . seedDB . mySeed . incSI ( links ) ;
yacyCore . seedDB . mySeed . incSU ( links ) ;
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return prop ;
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}
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}