/*
* 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 com.facebook.presto.raptor.backup;
import com.facebook.presto.spi.PrestoException;
import com.google.common.util.concurrent.SimpleTimeLimiter;
import com.google.common.util.concurrent.TimeLimiter;
import com.google.common.util.concurrent.UncheckedTimeoutException;
import io.airlift.concurrent.BoundedExecutor;
import io.airlift.concurrent.ExecutorServiceAdapter;
import io.airlift.units.Duration;
import javax.annotation.PreDestroy;
import java.io.File;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import static com.facebook.presto.raptor.RaptorErrorCode.RAPTOR_BACKUP_TIMEOUT;
import static io.airlift.concurrent.Threads.daemonThreadsNamed;
import static java.util.Objects.requireNonNull;
import static java.util.concurrent.Executors.newCachedThreadPool;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
public class TimeoutBackupStore
implements BackupStore
{
private final ExecutorService executor;
private final BackupStore store;
public TimeoutBackupStore(BackupStore store, String connectorId, Duration timeout, int maxThreads)
{
requireNonNull(store, "store is null");
requireNonNull(connectorId, "connectorId is null");
requireNonNull(timeout, "timeout is null");
this.executor = newCachedThreadPool(daemonThreadsNamed("backup-proxy-" + connectorId + "-%s"));
this.store = timeLimited(store, BackupStore.class, timeout, executor, maxThreads);
}
@PreDestroy
public void shutdown()
{
executor.shutdownNow();
}
@Override
public void backupShard(UUID uuid, File source)
{
try {
store.backupShard(uuid, source);
}
catch (UncheckedTimeoutException e) {
timeoutException(uuid, "Shard backup timed out");
}
}
@Override
public void restoreShard(UUID uuid, File target)
{
try {
store.restoreShard(uuid, target);
}
catch (UncheckedTimeoutException e) {
timeoutException(uuid, "Shard restore timed out");
}
}
@Override
public boolean deleteShard(UUID uuid)
{
try {
return store.deleteShard(uuid);
}
catch (UncheckedTimeoutException e) {
throw timeoutException(uuid, "Shard delete timed out");
}
}
@Override
public boolean shardExists(UUID uuid)
{
try {
return store.shardExists(uuid);
}
catch (UncheckedTimeoutException e) {
throw timeoutException(uuid, "Shard existence check timed out");
}
}
private static <T> T timeLimited(T target, Class<T> clazz, Duration timeout, ExecutorService executor, int maxThreads)
{
executor = new ExecutorServiceAdapter(new BoundedExecutor(executor, maxThreads));
TimeLimiter limiter = new SimpleTimeLimiter(executor);
return limiter.newProxy(target, clazz, timeout.toMillis(), MILLISECONDS);
}
private static PrestoException timeoutException(UUID uuid, String message)
{
throw new PrestoException(RAPTOR_BACKUP_TIMEOUT, message + ": " + uuid);
}
}