001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.ipc;
019
020import java.io.IOException;
021import java.util.Map;
022import org.apache.hadoop.conf.Configuration;
023import org.apache.hadoop.hbase.ExtendedCellScanner;
024import org.apache.hadoop.hbase.HBaseInterfaceAudience;
025import org.apache.yetus.audience.InterfaceAudience;
026import org.apache.yetus.audience.InterfaceStability;
027
028import org.apache.hbase.thirdparty.com.google.protobuf.BlockingService;
029import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;
030import org.apache.hbase.thirdparty.com.google.protobuf.Message;
031
032import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;
033
034/**
035 * Interface of all necessary to carry out a RPC method invocation on the server.
036 */
037@InterfaceAudience.LimitedPrivate({ HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX })
038@InterfaceStability.Evolving
039public interface RpcCall extends RpcCallContext {
040
041  /** Returns The service of this call. */
042  BlockingService getService();
043
044  /** Returns The service method. */
045  MethodDescriptor getMethod();
046
047  /** Returns The call parameter message. */
048  Message getParam();
049
050  /** Returns The CellScanner that can carry input and result payload. */
051  ExtendedCellScanner getCellScanner();
052
053  /** Returns The timestamp when the call is constructed. */
054  long getReceiveTime();
055
056  /** Returns The time when the call starts to be executed. */
057  long getStartTime();
058
059  /**
060   * Set the time when the call starts to be executed.
061   */
062  void setStartTime(long startTime);
063
064  /** Returns The timeout of this call. */
065  int getTimeout();
066
067  /** Returns The Priority of this call. */
068  int getPriority();
069
070  /**
071   * Return the deadline of this call. If we can not complete this call in time, we can throw a
072   * TimeoutIOException and RPCServer will drop it.
073   * @return The system timestamp of deadline.
074   */
075  long getDeadline();
076
077  /**
078   * Used to calculate the request call queue size. If the total request call size exceeds a limit,
079   * the call will be rejected.
080   * @return The raw size of this call.
081   */
082  long getSize();
083
084  /** Returns The request header of this call. */
085  RequestHeader getHeader();
086
087  /**
088   * Returns the map of attributes specified when building the Connection.
089   * @see org.apache.hadoop.hbase.client.ConnectionFactory#createConnection(Configuration,
090   *      ExecutorService, User, Map)
091   */
092  Map<String, byte[]> getConnectionAttributes();
093
094  /**
095   * Returns the map of attributes specified when building the request. This map is lazily evaluated
096   * so if you only need a single attribute then it may be cheaper to use
097   * {@link #getRequestAttribute(String)}
098   * @see org.apache.hadoop.hbase.client.TableBuilder#setRequestAttribute(String, byte[])
099   */
100  Map<String, byte[]> getRequestAttributes();
101
102  /**
103   * Returns a single request attribute value, or null if no value is present. If you need many
104   * request attributes then you should fetch the lazily evaluated map via
105   * {@link #getRequestAttributes()}
106   * @see org.apache.hadoop.hbase.client.TableBuilder#setRequestAttribute(String, byte[])
107   */
108  byte[] getRequestAttribute(String key);
109
110  /** Returns Port of remote address in this call */
111  int getRemotePort();
112
113  /**
114   * Set the response resulting from this RPC call.
115   * @param param          The result message as response.
116   * @param cells          The CellScanner that possibly carries the payload.
117   * @param errorThrowable The error Throwable resulting from the call.
118   * @param error          Extra error message.
119   */
120  void setResponse(Message param, ExtendedCellScanner cells, Throwable errorThrowable,
121    String error);
122
123  /**
124   * Send the response of this RPC call. Implementation provides the underlying facility
125   * (connection, etc) to send.
126   */
127  void sendResponseIfReady() throws IOException;
128
129  /**
130   * Do the necessary cleanup after the call if needed.
131   */
132  void cleanup();
133
134  /** Returns A short string format of this call without possibly lengthy params */
135  String toShortString();
136
137  void updateFsReadTime(long latencyMillis);
138
139  long getFsReadTime();
140}