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Diffstat (limited to 'third_party/protobuf/3.4.0/java/core/src/main/java/com/google/protobuf/RpcController.java')
-rw-r--r-- | third_party/protobuf/3.4.0/java/core/src/main/java/com/google/protobuf/RpcController.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/third_party/protobuf/3.4.0/java/core/src/main/java/com/google/protobuf/RpcController.java b/third_party/protobuf/3.4.0/java/core/src/main/java/com/google/protobuf/RpcController.java new file mode 100644 index 0000000000..a92dd7be6d --- /dev/null +++ b/third_party/protobuf/3.4.0/java/core/src/main/java/com/google/protobuf/RpcController.java @@ -0,0 +1,118 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// 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, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +package com.google.protobuf; + +/** + * <p>An {@code RpcController} mediates a single method call. The primary + * purpose of the controller is to provide a way to manipulate settings + * specific to the RPC implementation and to find out about RPC-level errors. + * + * <p>Starting with version 2.3.0, RPC implementations should not try to build + * on this, but should instead provide code generator plugins which generate + * code specific to the particular RPC implementation. This way the generated + * code can be more appropriate for the implementation in use and can avoid + * unnecessary layers of indirection. + * + * <p>The methods provided by the {@code RpcController} interface are intended + * to be a "least common denominator" set of features which we expect all + * implementations to support. Specific implementations may provide more + * advanced features (e.g. deadline propagation). + * + * @author kenton@google.com Kenton Varda + */ +public interface RpcController { + // ----------------------------------------------------------------- + // These calls may be made from the client side only. Their results + // are undefined on the server side (may throw RuntimeExceptions). + + /** + * Resets the RpcController to its initial state so that it may be reused in + * a new call. This can be called from the client side only. It must not + * be called while an RPC is in progress. + */ + void reset(); + + /** + * After a call has finished, returns true if the call failed. The possible + * reasons for failure depend on the RPC implementation. {@code failed()} + * most only be called on the client side, and must not be called before a + * call has finished. + */ + boolean failed(); + + /** + * If {@code failed()} is {@code true}, returns a human-readable description + * of the error. + */ + String errorText(); + + /** + * Advises the RPC system that the caller desires that the RPC call be + * canceled. The RPC system may cancel it immediately, may wait awhile and + * then cancel it, or may not even cancel the call at all. If the call is + * canceled, the "done" callback will still be called and the RpcController + * will indicate that the call failed at that time. + */ + void startCancel(); + + // ----------------------------------------------------------------- + // These calls may be made from the server side only. Their results + // are undefined on the client side (may throw RuntimeExceptions). + + /** + * Causes {@code failed()} to return true on the client side. {@code reason} + * will be incorporated into the message returned by {@code errorText()}. + * If you find you need to return machine-readable information about + * failures, you should incorporate it into your response protocol buffer + * and should NOT call {@code setFailed()}. + */ + void setFailed(String reason); + + /** + * If {@code true}, indicates that the client canceled the RPC, so the server + * may as well give up on replying to it. This method must be called on the + * server side only. The server should still call the final "done" callback. + */ + boolean isCanceled(); + + /** + * Asks that the given callback be called when the RPC is canceled. The + * parameter passed to the callback will always be {@code null}. The + * callback will always be called exactly once. If the RPC completes without + * being canceled, the callback will be called after completion. If the RPC + * has already been canceled when NotifyOnCancel() is called, the callback + * will be called immediately. + * + * <p>{@code notifyOnCancel()} must be called no more than once per request. + * It must be called on the server side only. + */ + void notifyOnCancel(RpcCallback<Object> callback); +} |