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/*
* 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.rya.periodic.notification.pruner;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.fluo.api.client.FluoClient;
import org.apache.fluo.api.client.Snapshot;
import org.apache.fluo.api.client.SnapshotBase;
import org.apache.rya.indexing.pcj.fluo.app.NodeType;
import org.apache.rya.indexing.pcj.fluo.app.util.PeriodicQueryUtil;
import org.apache.rya.periodic.notification.api.BinPruner;
import org.apache.rya.periodic.notification.api.NodeBin;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of {@link BinPruner} that deletes old, already processed
* Periodic Query results from Fluo and the PCJ table to which the Fluo results
* are exported.
*
*/
public class PeriodicQueryPruner implements BinPruner, Runnable {
private static final Logger log = LoggerFactory.getLogger(PeriodicQueryPruner.class);
private final FluoClient client;
private final AccumuloBinPruner accPruner;
private final FluoBinPruner fluoPruner;
private final BlockingQueue<NodeBin> bins;
private final AtomicBoolean closed = new AtomicBoolean(false);
private final int threadNumber;
public PeriodicQueryPruner(final FluoBinPruner fluoPruner, final AccumuloBinPruner accPruner, final FluoClient client, final BlockingQueue<NodeBin> bins, final int threadNumber) {
this.fluoPruner = Objects.requireNonNull(fluoPruner);
this.accPruner = Objects.requireNonNull(accPruner);
this.client = Objects.requireNonNull(client);
this.bins = Objects.requireNonNull(bins);
this.threadNumber = threadNumber;
}
@Override
public void run() {
try {
while (!closed.get()) {
pruneBindingSetBin(bins.take());
}
} catch (final InterruptedException e) {
log.warn("Thread {} is unable to prune the next message.", threadNumber);
throw new RuntimeException(e);
}
}
/**
* Prunes BindingSet bins from the Rya Fluo Application in addition to the BindingSet
* bins created in the PCJ tables associated with the give query id.
* @param id - QueryResult Id for the Rya Fluo application
* @param bin - bin id for bins to be deleted
*/
@Override
public void pruneBindingSetBin(final NodeBin nodeBin) {
final String pcjId = nodeBin.getNodeId();
final long bin = nodeBin.getBin();
try(Snapshot sx = client.newSnapshot()) {
final String queryId = NodeType.generateNewIdForType(NodeType.QUERY, pcjId);
final Set<String> fluoIds = getNodeIdsFromResultId(sx, queryId);
accPruner.pruneBindingSetBin(nodeBin);
for(final String fluoId: fluoIds) {
fluoPruner.pruneBindingSetBin(new NodeBin(fluoId, bin));
}
} catch (final Exception e) {
log.warn("Could not successfully initialize PeriodicQueryBinPruner.", e);
}
}
public void shutdown() {
closed.set(true);
}
private Set<String> getNodeIdsFromResultId(final SnapshotBase sx, final String id) {
final Set<String> ids = new HashSet<>();
PeriodicQueryUtil.getPeriodicQueryNodeAncestorIds(sx, id, ids);
return ids;
}
}