/*
* Copyright 2017 the original author or authors.
*
* 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.gradle.caching.local.internal;
import com.google.common.io.Closer;
import org.apache.commons.io.FileUtils;
import org.gradle.api.UncheckedIOException;
import org.gradle.cache.CacheBuilder;
import org.gradle.cache.CacheRepository;
import org.gradle.cache.PersistentCache;
import org.gradle.cache.internal.FixedSizeOldestCacheCleanup;
import org.gradle.caching.BuildCacheEntryReader;
import org.gradle.caching.BuildCacheEntryWriter;
import org.gradle.caching.BuildCacheException;
import org.gradle.caching.BuildCacheKey;
import org.gradle.caching.BuildCacheService;
import org.gradle.internal.Factory;
import org.gradle.internal.operations.BuildOperationExecutor;
import org.gradle.internal.resource.local.LocallyAvailableResource;
import org.gradle.internal.resource.local.PathKeyFileStore;
import org.gradle.util.GFileUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import static org.gradle.cache.internal.FileLockManager.LockMode.None;
import static org.gradle.cache.internal.filelock.LockOptionsBuilder.mode;
public class DirectoryBuildCacheService implements BuildCacheService {
private final PathKeyFileStore fileStore;
private final PersistentCache persistentCache;
public DirectoryBuildCacheService(CacheRepository cacheRepository, BuildOperationExecutor buildOperationExecutor, File baseDir, long targetCacheSize) {
this.fileStore = new PathKeyFileStore(baseDir);
this.persistentCache = cacheRepository
.cache(checkDirectory(baseDir))
.withCleanup(new FixedSizeOldestCacheCleanup(buildOperationExecutor, targetCacheSize))
.withDisplayName("Build cache")
.withLockOptions(mode(None))
.withCrossVersionCache(CacheBuilder.LockTarget.DefaultTarget)
.open();
}
private static File checkDirectory(File directory) {
if (directory.exists()) {
if (!directory.isDirectory()) {
throw new IllegalArgumentException(String.format("Cache directory %s must be a directory", directory));
}
if (!directory.canRead()) {
throw new IllegalArgumentException(String.format("Cache directory %s must be readable", directory));
}
if (!directory.canWrite()) {
throw new IllegalArgumentException(String.format("Cache directory %s must be writable", directory));
}
} else {
if (!directory.mkdirs()) {
throw new UncheckedIOException(String.format("Could not create cache directory: %s", directory));
}
}
return directory;
}
@Override
public boolean load(final BuildCacheKey key, final BuildCacheEntryReader reader) throws BuildCacheException {
// We need to lock here because garbage collection can be under way in another process
return persistentCache.withFileLock(new Factory<Boolean>() {
@Override
public Boolean create() {
LocallyAvailableResource resource = fileStore.get(key.getHashCode());
if (resource == null) {
return false;
}
try {
// Mark as recently used
GFileUtils.touch(resource.getFile());
Closer closer = Closer.create();
FileInputStream stream = closer.register(new FileInputStream(resource.getFile()));
try {
reader.readFrom(stream);
return true;
} finally {
closer.close();
}
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
}
});
}
@Override
public void store(final BuildCacheKey key, final BuildCacheEntryWriter result) throws BuildCacheException {
final String hashCode = key.getHashCode();
final File tempFile;
try {
tempFile = File.createTempFile(hashCode, ".part", persistentCache.getBaseDir());
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
try {
try {
Closer closer = Closer.create();
OutputStream output = closer.register(new FileOutputStream(tempFile));
try {
result.writeTo(output);
} finally {
closer.close();
}
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
persistentCache.useCache(new Runnable() {
@Override
public void run() {
fileStore.move(hashCode, tempFile);
}
});
} finally {
FileUtils.deleteQuietly(tempFile);
}
}
@Override
public void close() throws IOException {
persistentCache.close();
}
}