| /* |
| * 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.service.paxos.v1; |
| |
| import org.apache.cassandra.utils.concurrent.CountDownLatch; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.db.ConsistencyLevel; |
| import org.apache.cassandra.db.WriteType; |
| import org.apache.cassandra.exceptions.WriteTimeoutException; |
| import org.apache.cassandra.net.RequestCallback; |
| import org.apache.cassandra.utils.concurrent.UncheckedInterruptedException; |
| |
| import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| import static org.apache.cassandra.utils.Clock.Global.nanoTime; |
| import static org.apache.cassandra.utils.concurrent.CountDownLatch.newCountDownLatch; |
| |
| public abstract class AbstractPaxosCallback<T> implements RequestCallback<T> |
| { |
| protected final CountDownLatch latch; |
| protected final int targets; |
| private final ConsistencyLevel consistency; |
| private final long queryStartNanoTime; |
| |
| public AbstractPaxosCallback(int targets, ConsistencyLevel consistency, long queryStartNanoTime) |
| { |
| this.targets = targets; |
| this.consistency = consistency; |
| latch = newCountDownLatch(targets); |
| this.queryStartNanoTime = queryStartNanoTime; |
| } |
| |
| public int getResponseCount() |
| { |
| return targets - latch.count(); |
| } |
| |
| public void await() throws WriteTimeoutException |
| { |
| try |
| { |
| long timeout = DatabaseDescriptor.getWriteRpcTimeout(NANOSECONDS) - (nanoTime() - queryStartNanoTime); |
| if (!latch.await(timeout, NANOSECONDS)) |
| throw new WriteTimeoutException(WriteType.CAS, consistency, getResponseCount(), targets); |
| } |
| catch (InterruptedException e) |
| { |
| throw new UncheckedInterruptedException(e); |
| } |
| } |
| } |