| /* |
| * 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; |
| |
| import java.net.InetAddress; |
| import java.util.Collection; |
| |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.net.MessageIn; |
| import org.apache.cassandra.db.ConsistencyLevel; |
| import org.apache.cassandra.db.WriteType; |
| |
| /** |
| * This class blocks for a quorum of responses _in the local datacenter only_ (CL.LOCAL_QUORUM). |
| */ |
| public class DatacenterWriteResponseHandler<T> extends WriteResponseHandler<T> |
| { |
| public DatacenterWriteResponseHandler(Collection<InetAddress> naturalEndpoints, |
| Collection<InetAddress> pendingEndpoints, |
| ConsistencyLevel consistencyLevel, |
| Keyspace keyspace, |
| Runnable callback, |
| WriteType writeType) |
| { |
| super(naturalEndpoints, pendingEndpoints, consistencyLevel, keyspace, callback, writeType); |
| assert consistencyLevel.isDatacenterLocal(); |
| } |
| |
| @Override |
| public void response(MessageIn<T> message) |
| { |
| if (message == null || waitingFor(message.from)) |
| super.response(message); |
| } |
| |
| @Override |
| protected int totalBlockFor() |
| { |
| // during bootstrap, include pending endpoints (only local here) in the count |
| // or we may fail the consistency level guarantees (see #833, #8058) |
| return consistencyLevel.blockFor(keyspace) + consistencyLevel.countLocalEndpoints(pendingEndpoints); |
| } |
| |
| @Override |
| protected boolean waitingFor(InetAddress from) |
| { |
| return consistencyLevel.isLocal(from); |
| } |
| } |