forked from grpc/grpc-java
/
UdsNettyChannelProvider.java
94 lines (84 loc) · 3.21 KB
/
UdsNettyChannelProvider.java
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/*
* Copyright 2015 The gRPC Authors
*
* Licensed 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 io.grpc.netty;
import io.grpc.CallCredentials;
import io.grpc.ChannelCredentials;
import io.grpc.InsecureChannelCredentials;
import io.grpc.Internal;
import io.grpc.ManagedChannelProvider;
import io.grpc.internal.SharedResourcePool;
import io.netty.channel.unix.DomainSocketAddress;
import java.net.SocketAddress;
import java.net.URI;
import java.util.Collection;
import java.util.Collections;
/** Provider for {@link NettyChannelBuilder} instances for UDS channels. */
@Internal
public final class UdsNettyChannelProvider extends ManagedChannelProvider {
@Override
public boolean isAvailable() {
return true;
}
@Override
public int priority() {
return 3;
}
@Override
public NettyChannelBuilder builderForAddress(String name, int port) {
throw new UnsupportedOperationException("host:port not supported");
}
@Override
public NettyChannelBuilder builderForTarget(String target) {
ChannelCredentials creds = InsecureChannelCredentials.create();
ProtocolNegotiators.FromChannelCredentialsResult result = ProtocolNegotiators.from(creds);
if (result.error != null) {
throw new RuntimeException(result.error);
}
return getNettyChannelBuilder(target, creds, null, result.negotiator);
}
@Override
public NewChannelBuilderResult newChannelBuilder(String target, ChannelCredentials creds) {
ProtocolNegotiators.FromChannelCredentialsResult result = ProtocolNegotiators.from(creds);
if (result.error != null) {
return NewChannelBuilderResult.error(result.error);
}
return NewChannelBuilderResult.channelBuilder(
getNettyChannelBuilder(target, creds, result.callCredentials, result.negotiator));
}
private static NettyChannelBuilder getNettyChannelBuilder(
String target,
ChannelCredentials creds,
CallCredentials callCredentials,
ProtocolNegotiator.ClientFactory negotiator) {
if (Utils.EPOLL_DOMAIN_CLIENT_CHANNEL_TYPE == null) {
throw new IllegalStateException("Epoll is not available");
}
String targetPath = UdsNameResolverProvider.getTargetPathFromUri(URI.create(target));
NettyChannelBuilder builder =
new NettyChannelBuilder(
new DomainSocketAddress(targetPath), creds, callCredentials, negotiator);
builder =
builder
.eventLoopGroupPool(
SharedResourcePool.forResource(Utils.DEFAULT_WORKER_EVENT_LOOP_GROUP))
.channelType(Utils.EPOLL_DOMAIN_CLIENT_CHANNEL_TYPE);
return builder;
}
@Override
protected Collection<Class<? extends SocketAddress>> getSupportedSocketAddressTypes() {
return Collections.singleton(DomainSocketAddress.class);
}
}