| /* |
| * 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.accumulo.tserver; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.accumulo.core.data.impl.KeyExtent; |
| import org.apache.accumulo.tserver.data.ServerConditionalMutation; |
| import org.apache.hadoop.io.WritableComparator; |
| |
| /** |
| * |
| */ |
| public class ConditionalMutationSet { |
| |
| interface DeferFilter { |
| void defer(List<ServerConditionalMutation> scml, List<ServerConditionalMutation> okMutations, |
| List<ServerConditionalMutation> deferred); |
| } |
| |
| static class DuplicateFilter implements DeferFilter { |
| @Override |
| public void defer(List<ServerConditionalMutation> scml, |
| List<ServerConditionalMutation> okMutations, List<ServerConditionalMutation> deferred) { |
| okMutations.add(scml.get(0)); |
| for (int i = 1; i < scml.size(); i++) { |
| if (Arrays.equals(scml.get(i - 1).getRow(), scml.get(i).getRow())) { |
| deferred.add(scml.get(i)); |
| } else { |
| okMutations.add(scml.get(i)); |
| } |
| } |
| } |
| } |
| |
| static void defer(Map<KeyExtent,List<ServerConditionalMutation>> updates, |
| Map<KeyExtent,List<ServerConditionalMutation>> deferredMutations, DeferFilter filter) { |
| for (Entry<KeyExtent,List<ServerConditionalMutation>> entry : updates.entrySet()) { |
| List<ServerConditionalMutation> scml = entry.getValue(); |
| List<ServerConditionalMutation> okMutations = new ArrayList<>(scml.size()); |
| List<ServerConditionalMutation> deferred = new ArrayList<>(); |
| filter.defer(scml, okMutations, deferred); |
| |
| if (deferred.size() > 0) { |
| scml.clear(); |
| scml.addAll(okMutations); |
| List<ServerConditionalMutation> l = deferredMutations.get(entry.getKey()); |
| if (l == null) { |
| l = deferred; |
| deferredMutations.put(entry.getKey(), l); |
| } else { |
| l.addAll(deferred); |
| } |
| |
| } |
| } |
| } |
| |
| static void deferDuplicatesRows(Map<KeyExtent,List<ServerConditionalMutation>> updates, |
| Map<KeyExtent,List<ServerConditionalMutation>> deferred) { |
| defer(updates, deferred, new DuplicateFilter()); |
| } |
| |
| static void sortConditionalMutations(Map<KeyExtent,List<ServerConditionalMutation>> updates) { |
| for (Entry<KeyExtent,List<ServerConditionalMutation>> entry : updates.entrySet()) { |
| Collections.sort(entry.getValue(), (o1, o2) -> WritableComparator.compareBytes(o1.getRow(), 0, |
| o1.getRow().length, o2.getRow(), 0, o2.getRow().length)); |
| } |
| } |
| } |