/*
* 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.internal;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.io.Files;
import org.apache.commons.io.IOUtils;
import org.gradle.api.UncheckedIOException;
import org.gradle.api.internal.file.TemporaryFileProvider;
import org.gradle.caching.BuildCacheEntryReader;
import org.gradle.caching.BuildCacheEntryWriter;
import org.gradle.caching.BuildCacheException;
import org.gradle.caching.BuildCacheKey;
import org.gradle.internal.concurrent.CompositeStoppable;
import org.gradle.util.GFileUtils;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class DispatchingBuildCacheService implements RoleAwareBuildCacheService {
@VisibleForTesting
final RoleAwareBuildCacheService local;
@VisibleForTesting
final boolean pushToLocal;
@VisibleForTesting
final RoleAwareBuildCacheService remote;
@VisibleForTesting
final boolean pushToRemote;
private final TemporaryFileProvider temporaryFileProvider;
private final String role;
DispatchingBuildCacheService(RoleAwareBuildCacheService local, boolean pushToLocal, RoleAwareBuildCacheService remote, boolean pushToRemote, TemporaryFileProvider temporaryFileProvider) {
this.local = local;
this.pushToLocal = pushToLocal;
this.remote = remote;
this.pushToRemote = pushToRemote;
this.temporaryFileProvider = temporaryFileProvider;
this.role = local.getRole() + " and " + remote.getRole();
}
@Override
public boolean load(BuildCacheKey key, BuildCacheEntryReader reader) throws BuildCacheException {
return local.load(key, reader) || remote.load(key, reader);
}
@Override
public void store(BuildCacheKey key, BuildCacheEntryWriter writer) throws BuildCacheException {
if (pushToLocal && pushToRemote) {
pushToLocalAndRemote(key, writer);
} else if (pushToLocal) {
local.store(key, writer);
} else if (pushToRemote) {
remote.store(key, writer);
}
}
private void pushToLocalAndRemote(BuildCacheKey key, BuildCacheEntryWriter writer) {
File destination = temporaryFileProvider.createTemporaryFile("gradle_cache", "entry");
try {
writeCacheEntryLocally(writer, destination);
BuildCacheEntryWriter copier = new CopyBuildCacheEntryWriter(destination);
local.store(key, copier);
remote.store(key, copier);
} catch (IOException e) {
throw new UncheckedIOException(e);
} finally {
GFileUtils.deleteQuietly(destination);
}
}
private void writeCacheEntryLocally(BuildCacheEntryWriter writer, File destination) throws IOException {
OutputStream fileOutputStream = null;
try {
fileOutputStream = new BufferedOutputStream(new FileOutputStream(destination));
writer.writeTo(fileOutputStream);
} catch (FileNotFoundException e) {
throw new BuildCacheException("Couldn't create local file for cache entry", e);
} finally {
IOUtils.closeQuietly(fileOutputStream);
}
}
@Override
public String getRole() {
return role;
}
@Override
public void close() throws IOException {
CompositeStoppable.stoppable(local, remote).stop();
}
private class CopyBuildCacheEntryWriter implements BuildCacheEntryWriter {
private final File source;
private CopyBuildCacheEntryWriter(File source) {
this.source = source;
}
@Override
public void writeTo(OutputStream output) throws IOException {
Files.copy(source, output);
}
}
}