| /* |
| * 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.cassandra.db.streaming; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterators; |
| import org.apache.cassandra.db.TypeSizes; |
| import org.apache.cassandra.io.IVersionedSerializer; |
| import org.apache.cassandra.io.sstable.Component; |
| import org.apache.cassandra.io.sstable.Descriptor; |
| import org.apache.cassandra.io.util.DataInputPlus; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.*; |
| |
| /** |
| * SSTable components and their sizes to be tranfered via entire-sstable-streaming |
| */ |
| public final class ComponentManifest implements Iterable<Component> |
| { |
| private static final List<Component> STREAM_COMPONENTS = ImmutableList.of(Component.DATA, Component.PRIMARY_INDEX, Component.STATS, |
| Component.COMPRESSION_INFO, Component.FILTER, Component.SUMMARY, |
| Component.DIGEST, Component.CRC); |
| |
| private final LinkedHashMap<Component, Long> components; |
| |
| public ComponentManifest(Map<Component, Long> components) |
| { |
| this.components = new LinkedHashMap<>(components); |
| } |
| |
| @VisibleForTesting |
| public static ComponentManifest create(Descriptor descriptor) |
| { |
| LinkedHashMap<Component, Long> components = new LinkedHashMap<>(STREAM_COMPONENTS.size()); |
| |
| for (Component component : STREAM_COMPONENTS) |
| { |
| File file = new File(descriptor.filenameFor(component)); |
| if (!file.exists()) |
| continue; |
| |
| components.put(component, file.length()); |
| } |
| |
| return new ComponentManifest(components); |
| } |
| |
| public long sizeOf(Component component) |
| { |
| Long size = components.get(component); |
| if (size == null) |
| throw new IllegalArgumentException("Component " + component + " is not present in the manifest"); |
| return size; |
| } |
| |
| public long totalSize() |
| { |
| long totalSize = 0; |
| for (Long size : components.values()) |
| totalSize += size; |
| return totalSize; |
| } |
| |
| public List<Component> components() |
| { |
| return new ArrayList<>(components.keySet()); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof ComponentManifest)) |
| return false; |
| |
| ComponentManifest that = (ComponentManifest) o; |
| return components.equals(that.components); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return components.hashCode(); |
| } |
| |
| public static final IVersionedSerializer<ComponentManifest> serializer = new IVersionedSerializer<ComponentManifest>() |
| { |
| public void serialize(ComponentManifest manifest, DataOutputPlus out, int version) throws IOException |
| { |
| out.writeUnsignedVInt(manifest.components.size()); |
| for (Map.Entry<Component, Long> entry : manifest.components.entrySet()) |
| { |
| out.writeUTF(entry.getKey().name); |
| out.writeUnsignedVInt(entry.getValue()); |
| } |
| } |
| |
| public ComponentManifest deserialize(DataInputPlus in, int version) throws IOException |
| { |
| int size = (int) in.readUnsignedVInt(); |
| |
| LinkedHashMap<Component, Long> components = new LinkedHashMap<>(size); |
| |
| for (int i = 0; i < size; i++) |
| { |
| Component component = Component.parse(in.readUTF()); |
| long length = in.readUnsignedVInt(); |
| components.put(component, length); |
| } |
| |
| return new ComponentManifest(components); |
| } |
| |
| public long serializedSize(ComponentManifest manifest, int version) |
| { |
| long size = TypeSizes.sizeofUnsignedVInt(manifest.components.size()); |
| for (Map.Entry<Component, Long> entry : manifest.components.entrySet()) |
| { |
| size += TypeSizes.sizeof(entry.getKey().name); |
| size += TypeSizes.sizeofUnsignedVInt(entry.getValue()); |
| } |
| return size; |
| } |
| }; |
| |
| @Override |
| public Iterator<Component> iterator() |
| { |
| return Iterators.unmodifiableIterator(components.keySet().iterator()); |
| } |
| } |