1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.ipc;
19
20
21 public interface RpcCallContext extends Delayable {
22 /**
23 * Check if the caller who made this IPC call has disconnected.
24 * If called from outside the context of IPC, this does nothing.
25 * @return < 0 if the caller is still connected. The time in ms
26 * since the disconnection otherwise
27 */
28 long disconnectSince();
29
30 /**
31 * If the client connected and specified a codec to use, then we will use this codec making
32 * cellblocks to return. If the client did not specify a codec, we assume it does not support
33 * cellblocks and will return all content protobuf'd (though it makes our serving slower).
34 * We need to ask this question per call because a server could be hosting both clients that
35 * support cellblocks while fielding requests from clients that do not.
36 * @return True if the client supports cellblocks, else return all content in pb
37 */
38 boolean isClientCellBlockSupport();
39 }