| /* |
| * 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.builders.impl.storage; |
| |
| import com.intellij.openapi.util.AtomicNotNullLazyValue; |
| import com.intellij.openapi.util.NotNullLazyValue; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.jps.builders.storage.BuildDataCorruptedException; |
| import org.jetbrains.jps.builders.BuildTarget; |
| import org.jetbrains.jps.builders.storage.BuildDataPaths; |
| import org.jetbrains.jps.builders.storage.StorageProvider; |
| import org.jetbrains.jps.incremental.storage.CompositeStorageOwner; |
| import org.jetbrains.jps.incremental.storage.StorageOwner; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| /** |
| * @author nik |
| */ |
| public class BuildTargetStorages extends CompositeStorageOwner { |
| private final BuildTarget<?> myTarget; |
| private final BuildDataPaths myPaths; |
| private final ConcurrentMap<StorageProvider<?>, AtomicNotNullLazyValue<? extends StorageOwner>> myStorages |
| = new ConcurrentHashMap<StorageProvider<?>, AtomicNotNullLazyValue<? extends StorageOwner>>(16, 0.75f, 1); |
| |
| public BuildTargetStorages(BuildTarget<?> target, BuildDataPaths paths) { |
| myTarget = target; |
| myPaths = paths; |
| } |
| |
| @NotNull |
| public <S extends StorageOwner> S getOrCreateStorage(@NotNull final StorageProvider<S> provider) throws IOException { |
| NotNullLazyValue<? extends StorageOwner> lazyValue = myStorages.get(provider); |
| if (lazyValue == null) { |
| AtomicNotNullLazyValue<S> newValue = new AtomicNotNullLazyValue<S>() { |
| @NotNull |
| @Override |
| protected S compute() { |
| try { |
| return provider.createStorage(myPaths.getTargetDataRoot(myTarget)); |
| } |
| catch (IOException e) { |
| throw new BuildDataCorruptedException(e); |
| } |
| } |
| }; |
| lazyValue = myStorages.putIfAbsent(provider, newValue); |
| if (lazyValue == null) { |
| lazyValue = newValue; // just initialized |
| } |
| } |
| //noinspection unchecked |
| try { |
| return (S)lazyValue.getValue(); |
| } |
| catch (BuildDataCorruptedException e) { |
| throw e.getCause(); |
| } |
| } |
| |
| @Override |
| protected Iterable<? extends StorageOwner> getChildStorages() { |
| return new Iterable<StorageOwner>() { |
| @Override |
| public Iterator<StorageOwner> iterator() { |
| final Iterator<AtomicNotNullLazyValue<? extends StorageOwner>> iterator = myStorages.values().iterator(); |
| return new Iterator<StorageOwner>() { |
| @Override |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| @Override |
| public StorageOwner next() { |
| return iterator.next().getValue(); |
| } |
| |
| @Override |
| public void remove() { |
| iterator.remove(); |
| } |
| }; |
| } |
| }; |
| } |
| } |