| /* |
| * Copyright 2000-2012 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.incremental.storage; |
| |
| import com.intellij.openapi.util.io.FileUtil; |
| import com.intellij.util.io.DataExternalizer; |
| import com.intellij.util.io.KeyDescriptor; |
| import com.intellij.util.io.PersistentHashMap; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.DataOutput; |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| public abstract class AbstractStateStorage<Key, T> implements StorageOwner { |
| private PersistentHashMap<Key, T> myMap; |
| private final File myBaseFile; |
| private final KeyDescriptor<Key> myKeyDescriptor; |
| private final DataExternalizer<T> myStateExternalizer; |
| protected final Object myDataLock = new Object(); |
| |
| public AbstractStateStorage(@NonNls File storePath, KeyDescriptor<Key> keyDescriptor, DataExternalizer<T> stateExternalizer) throws IOException { |
| myBaseFile = storePath; |
| myKeyDescriptor = keyDescriptor; |
| myStateExternalizer = stateExternalizer; |
| myMap = createMap(storePath); |
| } |
| |
| public void force() { |
| synchronized (myDataLock) { |
| myMap.force(); |
| } |
| } |
| |
| public void dropMemoryCache() { |
| synchronized (myDataLock) { |
| if (myMap.isDirty()) { |
| myMap.dropMemoryCaches(); |
| } |
| } |
| } |
| |
| public void close() throws IOException { |
| synchronized (myDataLock) { |
| myMap.close(); |
| } |
| } |
| |
| @Override |
| public void clean() throws IOException { |
| wipe(); |
| } |
| |
| public boolean wipe() { |
| synchronized (myDataLock) { |
| try { |
| myMap.close(); |
| } |
| catch (IOException ignored) { |
| } |
| PersistentHashMap.deleteFilesStartingWith(myBaseFile); |
| try { |
| myMap = createMap(myBaseFile); |
| } |
| catch (IOException ignored) { |
| return false; |
| } |
| return true; |
| } |
| } |
| |
| public void update(Key key, @Nullable T state) throws IOException { |
| if (state != null) { |
| synchronized (myDataLock) { |
| myMap.put(key, state); |
| } |
| } |
| else { |
| remove(key); |
| } |
| } |
| |
| public void appendData(final Key key, final T data) throws IOException { |
| synchronized (myDataLock) { |
| myMap.appendData(key, new PersistentHashMap.ValueDataAppender() { |
| public void append(DataOutput out) throws IOException { |
| myStateExternalizer.save(out, data); |
| } |
| }); |
| } |
| } |
| |
| public void remove(Key key) throws IOException { |
| synchronized (myDataLock) { |
| myMap.remove(key); |
| } |
| } |
| |
| @Nullable |
| public T getState(Key key) throws IOException { |
| synchronized (myDataLock) { |
| return myMap.get(key); |
| } |
| } |
| |
| public Collection<Key> getKeys() throws IOException { |
| synchronized (myDataLock) { |
| return myMap.getAllKeysWithExistingMapping(); |
| } |
| } |
| |
| public Iterator<Key> getKeysIterator() throws IOException { |
| synchronized (myDataLock) { |
| return myMap.getAllKeysWithExistingMapping().iterator(); |
| } |
| } |
| |
| |
| private PersistentHashMap<Key, T> createMap(final File file) throws IOException { |
| FileUtil.createIfDoesntExist(file); |
| return new PersistentHashMap<Key,T>(file, myKeyDescriptor, myStateExternalizer); |
| } |
| |
| public void flush(boolean memoryCachesOnly) { |
| if (memoryCachesOnly) { |
| dropMemoryCache(); |
| } |
| else { |
| force(); |
| } |
| } |
| } |