/*
* Copyright 2011 JBoss Inc..
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.grid.remote;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Iterator;
import org.drools.command.KnowledgeContextResolveFromContextCommand;
import org.drools.grid.GridNode;
import org.drools.grid.GridServiceDescription;
import org.drools.grid.io.ConversationManager;
import org.drools.grid.io.impl.CommandImpl;
import org.drools.grid.remote.command.HasNextQueryResultsRowRemoteCommand;
import org.drools.grid.remote.command.NextQueryResultsRowRemoteCommand;
import org.drools.runtime.rule.QueryResultsRow;
/**
*
* @author salaboy
*/
public class QueryResultsRowIteratorRemoteClient implements Iterator<QueryResultsRow>{
private String queryName;
private String localId;
private GridServiceDescription<GridNode> gsd;
private String instanceId;
private ConversationManager cm;
public QueryResultsRowIteratorRemoteClient(String queryName, String localId, String instanceId, GridServiceDescription gsd,
ConversationManager cm) {
this.queryName = queryName;
this.localId = localId;
this.cm = cm;
this.gsd = gsd;
this.instanceId = instanceId;
}
public boolean hasNext() {
String kresultsId = "kresults_" + this.gsd.getId();
CommandImpl cmd = new CommandImpl( "execute",
Arrays.asList( new Object[]{ new KnowledgeContextResolveFromContextCommand( new HasNextQueryResultsRowRemoteCommand(this.queryName, this.localId ),
null,
null,
this.instanceId,
kresultsId )} ) );
Boolean result = (Boolean)ConversationUtil.sendMessage( this.cm,
(InetSocketAddress) this.gsd.getAddresses().get( "socket" ).getObject(),
this.gsd.getId(),
cmd );
return result;
}
public QueryResultsRow next() {
String kresultsId = "kresults_" + this.gsd.getId();
CommandImpl cmd = new CommandImpl( "execute",
Arrays.asList( new Object[]{ new KnowledgeContextResolveFromContextCommand( new NextQueryResultsRowRemoteCommand(this.queryName, this.localId ),
null,
null,
this.instanceId,
kresultsId )} ) );
String rowId = (String)ConversationUtil.sendMessage( this.cm,
(InetSocketAddress) this.gsd.getAddresses().get( "socket" ).getObject(),
this.gsd.getId(),
cmd );
return new QueryResultsRowRemoteClient(rowId, this.queryName, this.localId,this.instanceId, this.gsd, this.cm);
}
public void remove() {
throw new UnsupportedOperationException("Not supported yet.");
}
}