io.grpc.internal.TransportProvider Maven / Gradle / Ivy
/*
* Copyright 2019 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.internal;
import javax.annotation.Nullable;
import javax.annotation.concurrent.ThreadSafe;
/**
* Provides transports for sending RPCs.
*/
@ThreadSafe
interface TransportProvider {
/**
* Returns a READY transport that will be used to create new streams.
*
* Returns {@code null} if the state is not READY. Will try to connect if state is IDLE.
*/
@Nullable
ClientTransport obtainActiveTransport();
}