nl.topicus.jdbc.shaded.io.grpc.Channel Maven / Gradle / Ivy
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/*
* Copyright 2014, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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package nl.topicus.jdbc.shaded.io.grpc;
import nl.topicus.jdbc.shaded.javax.annotation.concurrent.ThreadSafe;
/**
* A virtual connection to a conceptual endpoint, to perform RPCs. A channel is free to have zero or
* many actual connections to the endpoint based on configuration, load, etc. A channel is also free
* to determine which actual endpoints to use and may change it every RPC, permitting client-side
* load balancing. Applications are generally expected to use stubs instead of calling this class
* directly.
*
* Applications can add nl.topicus.jdbc.shaded.com.on cross-cutting behaviors to stubs by decorating Channel
* implementations using {@link ClientInterceptor}. It is expected that most application
* code will not use this class directly but rather work with stubs that have been bound to a
* Channel that was decorated during application initialization.
*/
@ThreadSafe
public abstract class Channel {
/**
* Create a {@link ClientCall} to the remote operation specified by the given
* {@link MethodDescriptor}. The returned {@link ClientCall} does not trigger any remote
* behavior until {@link ClientCall#start(ClientCall.Listener, Metadata)} is
* invoked.
*
* @param methodDescriptor describes the name and parameter types of the operation to call.
* @param callOptions runtime options to be applied to this call.
* @return a {@link ClientCall} bound to the specified method.
* @since 1.0.0
*/
public abstract ClientCall newCall(
MethodDescriptor methodDescriptor, CallOptions callOptions);
/**
* The authority of the destination this channel connects to. Typically this is in the format
* {@code host:port}.
*
* @since 1.0.0
*/
public abstract String authority();
}