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/*
* 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.zookeeper.server.quorum;
import org.apache.zookeeper.server.Request;
import org.apache.zookeeper.server.RequestProcessor;
import org.apache.zookeeper.server.ServerMetrics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This is a very simple RequestProcessor that simply forwards a request from a
* previous stage to the leader as an ACK.
*/
class AckRequestProcessor implements RequestProcessor {
private static final Logger LOG = LoggerFactory.getLogger(AckRequestProcessor.class);
Leader leader;
AckRequestProcessor(Leader leader) {
this.leader = leader;
}
/**
* Forward the request as an ACK to the leader
*/
public void processRequest(Request request) {
QuorumPeer self = leader.self;
if (self != null) {
request.logLatency(ServerMetrics.getMetrics().PROPOSAL_ACK_CREATION_LATENCY);
leader.processAck(self.getMyId(), request.zxid, null);
} else {
LOG.error("Null QuorumPeer");
}
}
public void shutdown() {
// TODO No need to do anything
}
}
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