/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cassandra.db.commitlog;
import org.apache.cassandra.config.DatabaseDescriptor;
class PeriodicCommitLogService extends AbstractCommitLogService
{
private static final long blockWhenSyncLagsNanos = (long) (DatabaseDescriptor.getCommitLogSyncPeriod() * 1.5e6);
public PeriodicCommitLogService(final CommitLog commitLog)
{
super(commitLog, "PERIODIC-COMMIT-LOG-SYNCER", DatabaseDescriptor.getCommitLogSyncPeriod());
}
protected void maybeWaitForSync(CommitLogSegment.Allocation alloc)
{
long expectedSyncTime = System.nanoTime() - blockWhenSyncLagsNanos;
if (lastSyncedAt < expectedSyncTime)
{
pending.incrementAndGet();
awaitSyncAt(expectedSyncTime, commitLog.metrics.waitingOnCommit.time());
pending.decrementAndGet();
}
}
}