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xds: implement XdsChannelCredentials (#7497)
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/* | ||
* Copyright 2020 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. | ||
*/ | ||
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package io.grpc.xds; | ||
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import static com.google.common.base.Preconditions.checkNotNull; | ||
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import io.grpc.ChannelCredentials; | ||
import io.grpc.ExperimentalApi; | ||
import io.grpc.netty.InternalNettyChannelCredentials; | ||
import io.grpc.netty.InternalProtocolNegotiator; | ||
import io.grpc.xds.internal.sds.SdsProtocolNegotiators; | ||
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@ExperimentalApi("https://github.com/grpc/grpc-java/issues/7479") | ||
public class XdsChannelCredentials { | ||
private XdsChannelCredentials() {} // prevent instantiation | ||
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/** | ||
* Creates credentials to be configured by xDS, falling back to other credentials if no | ||
* TLS configuration is provided by xDS. | ||
* | ||
* @param fallback Credentials to fall back to. | ||
* | ||
* @throws IllegalArgumentException if fallback is unable to be used | ||
*/ | ||
public static ChannelCredentials create(ChannelCredentials fallback) { | ||
InternalProtocolNegotiator.ClientFactory fallbackNegotiator = | ||
InternalNettyChannelCredentials.toNegotiator(checkNotNull(fallback, "fallback")); | ||
return InternalNettyChannelCredentials.create( | ||
SdsProtocolNegotiators.clientProtocolNegotiatorFactory(fallbackNegotiator)); | ||
} | ||
} |
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