mirror of https://github.com/grpc/grpc-java.git
58 lines
1.8 KiB
Java
58 lines
1.8 KiB
Java
/*
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* Copyright 2020 The gRPC Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.grpc;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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/**
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* Provides a list of {@link ServerCredentials}, where any one may be used. The credentials are in
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* preference order.
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*/
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@ExperimentalApi("https://github.com/grpc/grpc-java/issues/7621")
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public final class ChoiceServerCredentials extends ServerCredentials {
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/**
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* Constructs with the provided {@code creds} as options, with preferred credentials first.
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*
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* @throws IllegalArgumentException if no creds are provided
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*/
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public static ServerCredentials create(ServerCredentials... creds) {
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if (creds.length == 0) {
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throw new IllegalArgumentException("At least one credential is required");
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}
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return new ChoiceServerCredentials(creds);
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}
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private final List<ServerCredentials> creds;
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private ChoiceServerCredentials(ServerCredentials... creds) {
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for (ServerCredentials cred : creds) {
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if (cred == null) {
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throw new NullPointerException();
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}
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}
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this.creds = Collections.unmodifiableList(new ArrayList<>(Arrays.asList(creds)));
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}
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/** Non-empty list of credentials, in preference order. */
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public List<ServerCredentials> getCredentialsList() {
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return creds;
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}
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}
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