org.apache.bookkeeper.common.grpc.proxy.ProxyServerCallHandler Maven / Gradle / Ivy
The newest version!
/*
* 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.bookkeeper.common.grpc.proxy;
import io.grpc.CallOptions;
import io.grpc.Channel;
import io.grpc.ClientCall;
import io.grpc.Metadata;
import io.grpc.ServerCall;
import io.grpc.ServerCall.Listener;
import io.grpc.ServerCallHandler;
/**
* Abstract server call handler.
*/
class ProxyServerCallHandler implements ServerCallHandler {
private final ChannelFinder finder;
private final CallOptions callOptions;
ProxyServerCallHandler(ChannelFinder finder,
CallOptions callOptions) {
this.finder = finder;
this.callOptions = callOptions;
}
@Override
public Listener startCall(ServerCall serverCall, Metadata headers) {
Channel channel = finder.findChannel(serverCall, headers);
ClientCall clientCall = channel.newCall(
serverCall.getMethodDescriptor(), callOptions);
ProxyCall proxyCall = new ProxyCall<>(
serverCall,
clientCall);
clientCall.start(proxyCall.getClientCallListener(), headers);
serverCall.request(1);
clientCall.request(1);
return proxyCall.getServerCallListener();
}
}