| /* |
| * 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.ignite.internal.processors.igfs; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.igfs.IgfsMode; |
| import org.apache.ignite.igfs.IgfsPath; |
| import org.apache.ignite.internal.util.GridBoundedConcurrentLinkedHashMap; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.internal.util.typedef.T2; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * |
| */ |
| public class IgfsModeResolver implements Externalizable { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** Maximum size of map with cached path modes. */ |
| private static final int MAX_PATH_CACHE = 1000; |
| |
| /** Default mode. */ |
| private IgfsMode dfltMode; |
| |
| /** Modes for particular paths. Ordered from longest to shortest. */ |
| private List<T2<IgfsPath, IgfsMode>> modes; |
| |
| /** Cached modes per path. */ |
| private Map<IgfsPath, IgfsMode> modesCache; |
| |
| /** Set to store parent dual paths that have primary children. */ |
| private Set<IgfsPath> dualParentsWithPrimaryChildren; |
| |
| /** |
| * Empty constructor required by {@link Externalizable}. |
| */ |
| public IgfsModeResolver() { |
| // No-op. |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param dfltMode Default IGFS mode. |
| * @param modes List of configured modes. The order is significant as modes are added in order of occurrence. |
| * @throws IgniteCheckedException On error. |
| */ |
| public IgfsModeResolver(IgfsMode dfltMode, @Nullable ArrayList<T2<IgfsPath, IgfsMode>> modes) |
| throws IgniteCheckedException { |
| assert dfltMode != null; |
| |
| this.dfltMode = dfltMode; |
| |
| dualParentsWithPrimaryChildren = new HashSet<>(); |
| |
| this.modes = IgfsUtils.preparePathModes(dfltMode, modes, dualParentsWithPrimaryChildren); |
| |
| if (modes != null) |
| modesCache = new GridBoundedConcurrentLinkedHashMap<>(MAX_PATH_CACHE); |
| } |
| |
| /** |
| * Resolves IGFS mode for the given path. |
| * |
| * @param path IGFS path. |
| * @return IGFS mode. |
| */ |
| public IgfsMode resolveMode(IgfsPath path) { |
| assert path != null; |
| |
| if (modes == null) |
| return dfltMode; |
| else { |
| IgfsMode mode = modesCache.get(path); |
| |
| if (mode == null) { |
| for (T2<IgfsPath, IgfsMode> entry : modes) { |
| if (F.eq(path, entry.getKey()) || path.isSubDirectoryOf(entry.getKey())) { |
| // As modes ordered from most specific to least specific first mode found is ours. |
| mode = entry.getValue(); |
| |
| break; |
| } |
| } |
| |
| if (mode == null) |
| mode = dfltMode; |
| |
| modesCache.put(path, mode); |
| } |
| |
| return mode; |
| } |
| } |
| |
| /** |
| * Answers if the given path has an immediate child of PRIMARY mode. |
| * |
| * @param path The path to query. |
| * @return If the given path has an immediate child of PRIMARY mode. |
| */ |
| public boolean hasPrimaryChild(IgfsPath path) { |
| return dualParentsWithPrimaryChildren.contains(path); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void writeExternal(ObjectOutput out) throws IOException { |
| U.writeEnum(out, dfltMode); |
| |
| if (modes != null) { |
| out.writeBoolean(true); |
| out.writeInt(modes.size()); |
| |
| for (T2<IgfsPath, IgfsMode> pathMode : modes) { |
| assert pathMode.getKey() != null; |
| |
| pathMode.getKey().writeExternal(out); |
| |
| U.writeEnum(out, pathMode.getValue()); |
| } |
| } |
| else |
| out.writeBoolean(false); |
| |
| if (!F.isEmpty(dualParentsWithPrimaryChildren)) { |
| out.writeBoolean(true); |
| out.writeInt(dualParentsWithPrimaryChildren.size()); |
| |
| for (IgfsPath p : dualParentsWithPrimaryChildren) |
| p.writeExternal(out); |
| } |
| else |
| out.writeBoolean(false); |
| |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| dfltMode = IgfsMode.fromOrdinal(in.readByte()); |
| |
| if (in.readBoolean()) { |
| int size = in.readInt(); |
| |
| modes = new ArrayList<>(size); |
| |
| for (int i = 0; i < size; i++) { |
| IgfsPath path = IgfsUtils.readPath(in); |
| |
| modes.add(new T2<>(path, IgfsMode.fromOrdinal(in.readByte()))); |
| } |
| |
| modesCache = new GridBoundedConcurrentLinkedHashMap<>(MAX_PATH_CACHE); |
| } |
| |
| dualParentsWithPrimaryChildren = new HashSet<>(); |
| |
| if (in.readBoolean()) { |
| int size = in.readInt(); |
| |
| for (int i = 0; i < size; i++) |
| dualParentsWithPrimaryChildren.add(IgfsUtils.readPath(in)); |
| } |
| } |
| } |