| /* |
| * 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.jackrabbit.oak.segment.spi.monitor; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.collect.Sets.newConcurrentHashSet; |
| import static java.util.Collections.emptySet; |
| |
| import java.io.File; |
| import java.util.Set; |
| |
| import org.apache.jackrabbit.oak.spi.whiteboard.Registration; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * This {@link IOMonitor} instance delegates all calls to all |
| * {@code IOMonitor} instances registered. |
| */ |
| public class CompositeIOMonitor implements IOMonitor { |
| private final Set<IOMonitor> ioMonitors; |
| |
| /** |
| * Create a new {@code CompositeIOMonitor} instance delegating the passed {@code ioMonitors} |
| * @param ioMonitors {@link IOMonitor} instances to delegate to |
| */ |
| public CompositeIOMonitor(@NotNull Iterable<? extends IOMonitor> ioMonitors) { |
| this.ioMonitors = newConcurrentHashSet(checkNotNull(ioMonitors)); |
| } |
| |
| /** |
| * Create a new empty {@code CompositeIOMonitor} instance. |
| */ |
| public CompositeIOMonitor() { |
| this(emptySet()); |
| } |
| |
| /** |
| * Register a {@code IOMonitor} instance to which this {@code CompositeIOMonitor} |
| * will delegate all its calls until {@link Registration#unregister()} is called |
| * on the return {@code Registration}. |
| * |
| * @param ioMonitor {@code IOMonitor} to delegate to |
| * @return a {@code Registration} for {@code ioMonitor}. |
| */ |
| @NotNull |
| public Registration registerIOMonitor(@NotNull IOMonitor ioMonitor) { |
| ioMonitors.add(checkNotNull(ioMonitor)); |
| return () -> ioMonitors.remove(ioMonitor); |
| } |
| |
| @Override |
| public void beforeSegmentRead(File file, long msb, long lsb, int length) { |
| ioMonitors.forEach(ioMonitor -> |
| ioMonitor.beforeSegmentRead(file, msb, lsb, length)); |
| } |
| |
| @Override |
| public void afterSegmentRead(File file, long msb, long lsb, int length, long elapsed) { |
| ioMonitors.forEach(ioMonitor -> |
| ioMonitor.afterSegmentRead(file, msb, lsb, length, elapsed)); |
| } |
| |
| @Override |
| public void beforeSegmentWrite(File file, long msb, long lsb, int length) { |
| ioMonitors.forEach(ioMonitor -> |
| ioMonitor.beforeSegmentWrite(file, msb, lsb, length)); |
| } |
| |
| @Override |
| public void afterSegmentWrite(File file, long msb, long lsb, int length, long elapsed) { |
| ioMonitors.forEach(ioMonitor -> |
| ioMonitor.afterSegmentWrite(file, msb, lsb, length, elapsed)); |
| } |
| } |