/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.blur.command;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.blur.command.annotation.Description;
import org.apache.blur.command.commandtype.ClusterExecuteServerReadCommandSingleTable;
@Description("Gets the number of visible documents in the index.")
public class DocumentCountCombiner extends ClusterExecuteServerReadCommandSingleTable<Long> {
private static final String DOC_COUNT_AGGREGATE = "docCountAggregate";
@Override
public String getName() {
return DOC_COUNT_AGGREGATE;
}
@Override
public Long execute(IndexContext context) throws IOException {
return (long) context.getIndexReader().numDocs();
}
@Override
public Long combine(CombiningContext context, Map<? extends Location<?>, Long> results) throws IOException {
long total = 0;
for (Long i : results.values()) {
total += i;
}
return total;
}
@Override
public Long clusterExecute(ClusterContext context) throws IOException {
Map<Server, Long> results = context.readServers(this);
long total = 0;
for (Entry<Server, Long> e : results.entrySet()) {
total += e.getValue();
}
return total;
}
}