| /* |
| * 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.hadoop.hbase.quotas; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Objects; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock; |
| import java.util.stream.Collectors; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.quotas.SpaceQuotaSnapshot.SpaceQuotaStatus; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.Quotas; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.SpaceQuota; |
| |
| /** |
| * {@link QuotaSnapshotStore} implementation for namespaces. |
| */ |
| @InterfaceAudience.Private |
| public class NamespaceQuotaSnapshotStore implements QuotaSnapshotStore<String> { |
| private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
| private final ReadLock rlock = lock.readLock(); |
| private final WriteLock wlock = lock.writeLock(); |
| |
| private final Connection conn; |
| private final QuotaObserverChore chore; |
| private Map<RegionInfo, Long> regionUsage; |
| |
| public NamespaceQuotaSnapshotStore(Connection conn, QuotaObserverChore chore, |
| Map<RegionInfo, Long> regionUsage) { |
| this.conn = Objects.requireNonNull(conn); |
| this.chore = Objects.requireNonNull(chore); |
| this.regionUsage = Objects.requireNonNull(regionUsage); |
| } |
| |
| @Override |
| public SpaceQuota getSpaceQuota(String namespace) throws IOException { |
| Quotas quotas = getQuotaForNamespace(namespace); |
| if (quotas != null && quotas.hasSpace()) { |
| return quotas.getSpace(); |
| } |
| return null; |
| } |
| |
| /** |
| * Fetches the namespace quota. Visible for mocking/testing. |
| */ |
| Quotas getQuotaForNamespace(String namespace) throws IOException { |
| return QuotaTableUtil.getNamespaceQuota(conn, namespace); |
| } |
| |
| @Override |
| public SpaceQuotaSnapshot getCurrentState(String namespace) { |
| // Defer the "current state" to the chore |
| return this.chore.getNamespaceQuotaSnapshot(namespace); |
| } |
| |
| @Override |
| public SpaceQuotaSnapshot getTargetState(String subject, SpaceQuota spaceQuota) |
| throws IOException { |
| rlock.lock(); |
| try { |
| final long sizeLimitInBytes = spaceQuota.getSoftLimit(); |
| long sum = 0L; |
| for (Entry<RegionInfo, Long> entry : filterBySubject(subject)) { |
| sum += entry.getValue(); |
| } |
| // Add in the size for any snapshots against this table |
| sum += QuotaTableUtil.getNamespaceSnapshotSize(conn, subject); |
| // Observance is defined as the size of the table being less than the limit |
| SpaceQuotaStatus status = sum <= sizeLimitInBytes |
| ? SpaceQuotaStatus.notInViolation() |
| : new SpaceQuotaStatus(ProtobufUtil.toViolationPolicy(spaceQuota.getViolationPolicy())); |
| return new SpaceQuotaSnapshot(status, sum, sizeLimitInBytes); |
| } finally { |
| rlock.unlock(); |
| } |
| } |
| |
| @Override |
| public Iterable<Entry<RegionInfo, Long>> filterBySubject(String namespace) { |
| rlock.lock(); |
| try { |
| return regionUsage.entrySet().stream() |
| .filter(entry -> namespace.equals(entry.getKey().getTable().getNamespaceAsString())) |
| .collect(Collectors.toList()); |
| } finally { |
| rlock.unlock(); |
| } |
| } |
| |
| @Override |
| public void setCurrentState(String namespace, SpaceQuotaSnapshot snapshot) { |
| // Defer the "current state" to the chore |
| this.chore.setNamespaceQuotaSnapshot(namespace, snapshot); |
| } |
| |
| @Override |
| public void setRegionUsage(Map<RegionInfo, Long> regionUsage) { |
| wlock.lock(); |
| try { |
| this.regionUsage = Objects.requireNonNull(regionUsage); |
| } finally { |
| wlock.unlock(); |
| } |
| } |
| } |