| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * Licensed 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.jetbrains.jps.builders.java.dependencyView; |
| |
| import com.intellij.util.Processor; |
| import com.intellij.util.containers.SLRUCache; |
| import com.intellij.util.io.DataExternalizer; |
| import com.intellij.util.io.KeyDescriptor; |
| import com.intellij.util.io.PersistentHashMap; |
| import gnu.trove.TIntObjectProcedure; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.jps.builders.storage.BuildDataCorruptedException; |
| |
| import java.io.*; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| /** |
| * @author: db |
| * Date: 08.03.11 |
| */ |
| class IntObjectPersistentMultiMaplet<V> extends IntObjectMultiMaplet<V> { |
| private static final Collection NULL_COLLECTION = Collections.emptySet(); |
| private static final int CACHE_SIZE = 128; |
| private final PersistentHashMap<Integer, Collection<V>> myMap; |
| private final DataExternalizer<V> myValueExternalizer; |
| private final SLRUCache<Integer, Collection> myCache; |
| |
| public IntObjectPersistentMultiMaplet(final File file, |
| final KeyDescriptor<Integer> keyExternalizer, |
| final DataExternalizer<V> valueExternalizer, |
| final CollectionFactory<V> collectionFactory) throws IOException { |
| myValueExternalizer = valueExternalizer; |
| myMap = new PersistentHashMap<Integer, Collection<V>>(file, keyExternalizer, new CollectionDataExternalizer<V>(valueExternalizer, collectionFactory)); |
| myCache = new SLRUCache<Integer, Collection>(CACHE_SIZE, CACHE_SIZE) { |
| @NotNull |
| @Override |
| public Collection createValue(Integer key) { |
| try { |
| final Collection<V> collection = myMap.get(key); |
| return collection == null? NULL_COLLECTION : collection; |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| }; |
| } |
| |
| |
| @Override |
| public boolean containsKey(final int key) { |
| try { |
| return myMap.containsMapping(key); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public Collection<V> get(final int key) { |
| final Collection<V> collection = myCache.get(key); |
| return collection == NULL_COLLECTION? null : collection; |
| } |
| |
| @Override |
| public void replace(int key, Collection<V> value) { |
| try { |
| myCache.remove(key); |
| if (value == null || value.isEmpty()) { |
| myMap.remove(key); |
| } |
| else { |
| myMap.put(key, value); |
| } |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public void put(final int key, final Collection<V> value) { |
| try { |
| myCache.remove(key); |
| myMap.appendData(key, new PersistentHashMap.ValueDataAppender() { |
| public void append(DataOutput out) throws IOException { |
| for (V v : value) { |
| myValueExternalizer.save(out, v); |
| } |
| } |
| }); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public void put(final int key, final V value) { |
| put(key, Collections.singleton(value)); |
| } |
| |
| @Override |
| public void removeAll(int key, Collection<V> values) { |
| try { |
| final Collection collection = myCache.get(key); |
| |
| if (collection != NULL_COLLECTION) { |
| if (collection.removeAll(values)) { |
| myCache.remove(key); |
| if (collection.isEmpty()) { |
| myMap.remove(key); |
| } |
| else { |
| myMap.put(key, (Collection<V>)collection); |
| } |
| } |
| } |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public void removeFrom(final int key, final V value) { |
| try { |
| final Collection collection = myCache.get(key); |
| |
| if (collection != NULL_COLLECTION) { |
| if (collection.remove(value)) { |
| myCache.remove(key); |
| if (collection.isEmpty()) { |
| myMap.remove(key); |
| } |
| else { |
| myMap.put(key, (Collection<V>)collection); |
| } |
| } |
| } |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public void remove(final int key) { |
| try { |
| myCache.remove(key); |
| myMap.remove(key); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| @Override |
| public void putAll(IntObjectMultiMaplet<V> m) { |
| m.forEachEntry(new TIntObjectProcedure<Collection<V>>() { |
| @Override |
| public boolean execute(int key, Collection<V> value) { |
| put(key, value); |
| return true; |
| } |
| }); |
| } |
| |
| @Override |
| public void replaceAll(IntObjectMultiMaplet<V> m) { |
| m.forEachEntry(new TIntObjectProcedure<Collection<V>>() { |
| @Override |
| public boolean execute(int key, Collection<V> value) { |
| replace(key, value); |
| return true; |
| } |
| }); |
| } |
| |
| @Override |
| public void close() { |
| try { |
| myCache.clear(); |
| myMap.close(); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| public void flush(boolean memoryCachesOnly) { |
| if (memoryCachesOnly) { |
| if (myMap.isDirty()) { |
| myMap.dropMemoryCaches(); |
| } |
| } |
| else { |
| myMap.force(); |
| } |
| } |
| |
| @Override |
| public void forEachEntry(final TIntObjectProcedure<Collection<V>> procedure) { |
| try { |
| myMap.processKeysWithExistingMapping(new Processor<Integer>() { |
| @Override |
| public boolean process(Integer key) { |
| try { |
| return procedure.execute(key, myMap.get(key)); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| }); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| |
| private static class CollectionDataExternalizer<V> implements DataExternalizer<Collection<V>> { |
| private final DataExternalizer<V> myElementExternalizer; |
| private final CollectionFactory<V> myCollectionFactory; |
| |
| public CollectionDataExternalizer(DataExternalizer<V> elementExternalizer, |
| CollectionFactory<V> collectionFactory) { |
| myElementExternalizer = elementExternalizer; |
| myCollectionFactory = collectionFactory; |
| } |
| |
| @Override |
| public void save(@NotNull final DataOutput out, final Collection<V> value) throws IOException { |
| for (V x : value) { |
| myElementExternalizer.save(out, x); |
| } |
| } |
| |
| @Override |
| public Collection<V> read(@NotNull final DataInput in) throws IOException { |
| final Collection<V> result = myCollectionFactory.create(); |
| final DataInputStream stream = (DataInputStream)in; |
| while (stream.available() > 0) { |
| result.add(myElementExternalizer.read(in)); |
| } |
| return result; |
| } |
| } |
| } |