Java MessageLite類代碼示例

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * @param commandId
 * @param clusterMessage
 * @since 1.0
 */
private void doGroup(short commandId, MyClusterMessage clusterMessage) {
    logger.debug("MyClusterMessageListener#doSwitch");
    IMHeader header = clusterMessage.getHeader();
    try {
        MessageLite body = clusterMessage.getMessage();
        switch (commandId) {
            case GroupCmdID.CID_GROUP_CHANGE_MEMBER_NOTIFY_VALUE:// todebug
                groupChangeMemberNotify(header, body);
                break;
            default:
                logger.warn("Unsupport command id {}", commandId);
                break;
        }
    } catch (IOException e) {
        logger.error("decode failed.", e);
    }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * Attempts to extract a protocol buffer from the specified extra.
 * @throws MalformedDataException if the intent is null, the extra is missing or not a byte
 *     array, or the protocol buffer could not be parsed.
 */
@NonNull
public static <T extends MessageLite> T extract(
        @NonNull String extraName,
        @NonNull Parser<T> protoParser,
        @NonNull String failureDescription,
        @Nullable Intent intent)
        throws MalformedDataException {

    if (intent == null) {
        throw new MalformedDataException(failureDescription);
    }

    byte[] protoBytes = intent.getByteArrayExtra(extraName);
    if (protoBytes == null) {
        throw new MalformedDataException(failureDescription);
    }

    try {
        return protoParser.parseFrom(protoBytes);
    } catch (IOException ex) {
        throw new MalformedDataException(failureDescription, ex);
    }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
@Override
public void pushShield(IMHeader header, MessageLite body, ChannelHandlerContext ctx) {
    IMPushShieldReq pushShieldReq = (IMPushShieldReq) body;
    long userId = super.getUserId(ctx);
	IMHeader resHeader = null;
	IMPushShieldRsp pushShieldRsp = null;
	
	try {   	  		
		BaseModel<Integer> pushShieldRes  = loginService.pushShield(userId, pushShieldReq.getShieldStatus());
		
		pushShieldRsp = IMPushShieldRsp.newBuilder()
				            .setUserId(userId)
				            .setResultCode(pushShieldRes.getCode())
				            .build();    
		resHeader = header.clone();
		resHeader.setCommandId((short)LoginCmdID.CID_LOGIN_RES_PUSH_SHIELD_VALUE);
		
		ctx.writeAndFlush(new IMProtoMessage<>(resHeader, pushShieldRsp));
		
	} catch(Exception e){
		
		logger.error("服務器端異常", e);
		ctx.writeAndFlush(new IMProtoMessage<>(resHeader, pushShieldRsp));
	} 
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
public static MessageLite getResponseDefaultInstance(int rpcType) throws RpcException {
  switch (rpcType) {
  case RpcType.ACK_VALUE:
    return Ack.getDefaultInstance();
  case RpcType.HANDSHAKE_VALUE:
    return BitControlHandshake.getDefaultInstance();
  case RpcType.RESP_FRAGMENT_HANDLE_VALUE:
    return FragmentHandle.getDefaultInstance();
  case RpcType.RESP_FRAGMENT_STATUS_VALUE:
    return FragmentStatus.getDefaultInstance();
  case RpcType.RESP_BIT_STATUS_VALUE:
    return BitStatus.getDefaultInstance();
  case RpcType.RESP_QUERY_STATUS_VALUE:
    return QueryProfile.getDefaultInstance();

  default:
    throw new UnsupportedOperationException();
  }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
@Override
protected ServerHandshakeHandler<BitClientHandshake> getHandshakeHandler(final BitServerConnection connection) {
  return new ServerHandshakeHandler<BitClientHandshake>(RpcType.HANDSHAKE, BitClientHandshake.PARSER) {

    @Override
    public MessageLite getHandshakeResponse(BitClientHandshake inbound) throws Exception {
      // logger.debug("Handling handshake from other bit. {}", inbound);
      if (inbound.getRpcVersion() != DataRpcConfig.RPC_VERSION) {
        throw new RpcException(String.format("Invalid rpc version.  Expected %d, actual %d.",
            inbound.getRpcVersion(), DataRpcConfig.RPC_VERSION));
      }
      if (inbound.getChannel() != RpcChannel.BIT_DATA) {
        throw new RpcException(String.format("Invalid NodeMode.  Expected BIT_DATA but received %s.",
            inbound.getChannel()));
      }

      return BitServerHandshake.newBuilder().setRpcVersion(DataRpcConfig.RPC_VERSION).build();
    }

  };
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * 發送當前踢人消息 handleKickUser
 * 
 * @param MessageLite
 * @param ChannelHandlerContext
 * @since 1.0 李春生
 */
private void handleKickUser(MessageLite body) {

    // 轉換body中的數據,判斷是否是真正的kickUser消息,如果是,則進行下麵的操作,不是拋出異常
    IMServerKickUser kickUser = (IMServerKickUser) body;

    long userId = kickUser.getUserId();
    int clientType = kickUser.getClientType().getNumber();
    int reason = kickUser.getReason();
    logger.debug("HandleKickUser, userId={}, clientType={}, reason={}", userId, clientType,
            reason);

    ClientUser clientUser = ClientUserManager.getUserById(userId);
    if (clientUser != null) {
        // 踢掉用戶,根據ClientType進行判斷
        clientUser.kickSameClientType(clientType, reason, null);
    }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
@Override
protected MessageLite getResponseDefaultInstance(int rpcType) throws RpcException {
  switch (rpcType) {
  case RpcType.ACK_VALUE:
    return Ack.getDefaultInstance();
  case RpcType.HANDSHAKE_VALUE:
    return BitToUserHandshake.getDefaultInstance();
  case RpcType.QUERY_HANDLE_VALUE:
    return QueryId.getDefaultInstance();
    case RpcType.QUERY_RESULT_VALUE:
      return QueryResult.getDefaultInstance();
  case RpcType.QUERY_DATA_VALUE:
    return QueryData.getDefaultInstance();
  }
  throw new RpcException(String.format("Unable to deal with RpcType of %d", rpcType));
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * Creates a {@link ByteString} by serializing the list of protos. Use
 * {@link #readMessageList(ByteString, Parser)} to deserialize.
 */
public static <T extends MessageLite> ByteString writeMessageList(List<T> protos) {
    Output output = ByteString.newOutput();
    try {
        writeMessageListTo(output, protos);
    } catch (IOException ex) {
        throw new IllegalStateException("Unable to write protobufs to memory");
    }

    return output.toByteString();
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * Reads a list of protos, using the provided parser, from the provided input stream.
 * @throws IOException if the proto list could not be parsed.
 */
public static <T extends MessageLite> List<T> readMessageList(
        InputStream stream,
        Parser<T> parser)
        throws IOException {
    DataInputStream dis = new DataInputStream(stream);
    int messageCount = dis.readInt();

    ArrayList<T> messages = new ArrayList<>(messageCount);
    for (int i = 0; i < messageCount; i++) {
        messages.add(parser.parseDelimitedFrom(stream));
    }

    return messages;
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * Convert a protobuf to message object according to the serviceId and commandId.
 * 
 * @param serviceId the service id
 * @param commandId the command id
 * @param bytes the protobuf to be parsed
 * @return the parsed message object
 * @throws IOException
 * @since  1.0
 */
public static MessageLite getMessage(final int serviceId, final int commandId, final byte[] bytes)
        throws IOException {
    Map<Integer, ProtobufParseMap.Parsing> parserMap = parseServiceMap.get(serviceId);
    if (parserMap == null) {
        throw new IOException("UnKnown Protocol service: " + serviceId);
    }

    ProtobufParseMap.Parsing parser = parserMap.get(commandId);
    if (parser == null) {
        throw new IOException(
                "UnKnown Protocol commandId: service=" + serviceId + ",command=" + commandId);
    }

    MessageLite msg = parser.process(bytes);
    return msg;
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
@Override
protected void encode(ChannelHandlerContext context, OutboundRpcMessage message, List<Object> out) throws Exception {
  if (message.mode != RpcMode.RESPONSE_FAILURE) {
    out.add(message);
    return;
  }

  final MessageLite pBody = message.pBody;
  if (!(pBody instanceof DremioPBError)) {
    out.add(message);
    return;
  }

  DremioPBError error = (DremioPBError) pBody;
  DremioPBError newError = ErrorCompatibility.convertIfNecessary(error);

  out.add(new OutboundRpcMessage(message.mode, message.rpcType, message.coordinationId, newError, message.dBodies));
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * 處理File消息
 * @param ctx 信道
 * @param commandId 命令
 * @param header 消息頭
 * @param body 消息體
 * @since  1.0
 */
public void doFile(ChannelHandlerContext ctx, short commandId, IMHeader header, MessageLite body) {

    // 判斷是否登錄
    if (!hasLogin(ctx)) {
        return ;
    }
    switch (commandId) {
        case FileCmdID.CID_FILE_REQUEST_VALUE:
            imFileHandle.fileReq(header, body, ctx);
            break;
        case FileCmdID.CID_FILE_HAS_OFFLINE_REQ_VALUE:
            imFileHandle.hasOfflineReq(header, body, ctx);
            break;
        case FileCmdID.CID_FILE_ADD_OFFLINE_REQ_VALUE:
            imFileHandle.addOfflineReq(header, body, ctx);
            break;
        case FileCmdID.CID_FILE_DEL_OFFLINE_REQ_VALUE:
            imFileHandle.delOfflineReq(header, body, ctx);
            break;
        default:
            logger.warn("Unsupport command id {}", commandId);
            break;
    }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/**
 * @param commandId
 * @param clusterMessage
 * @since 1.0
 */
private void doSwitch(short commandId, MyClusterMessage clusterMessage) {
    logger.debug("MyClusterMessageListener#doSwitch");
    IMHeader header = clusterMessage.getHeader();
    try {
        MessageLite body = clusterMessage.getMessage();
        switch (commandId) {
            case SwitchServiceCmdID.CID_SWITCH_P2P_CMD_VALUE:// todebug
                switchP2p(header, body);
            default:
                logger.warn("Unsupport command id {}", commandId);
                break;
        }
    } catch (IOException e) {
        logger.error("decode failed.", e);
    }
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
@Override
protected MessageLite getResponseDefaultInstance(int rpcType) throws RpcException {
  switch (rpcType) {
  case RpcType.ACK_VALUE:
    return Ack.getDefaultInstance();
  case RpcType.HANDSHAKE_VALUE:
    return BitToUserHandshake.getDefaultInstance();
  case RpcType.QUERY_HANDLE_VALUE:
    return QueryId.getDefaultInstance();
  case RpcType.QUERY_RESULT_VALUE:
    return QueryResult.getDefaultInstance();
  case RpcType.QUERY_DATA_VALUE:
    return QueryData.getDefaultInstance();
  case RpcType.QUERY_PLAN_FRAGMENTS_VALUE:
    return QueryPlanFragments.getDefaultInstance();
  case RpcType.CATALOGS_VALUE:
    return GetCatalogsResp.getDefaultInstance();
  case RpcType.SCHEMAS_VALUE:
    return GetSchemasResp.getDefaultInstance();
  case RpcType.TABLES_VALUE:
    return GetTablesResp.getDefaultInstance();
  case RpcType.COLUMNS_VALUE:
    return GetColumnsResp.getDefaultInstance();
  case RpcType.PREPARED_STATEMENT_VALUE:
    return CreatePreparedStatementResp.getDefaultInstance();
  case RpcType.SERVER_META_VALUE:
    return GetServerMetaResp.getDefaultInstance();
  }
  throw new RpcException(String.format("Unable to deal with RpcType of %d", rpcType));
}
 

import com.google.protobuf.MessageLite; //導入依賴的package包/類
/** Attempts to read a buffered message from the underlying connection. This is more efficient
 * than attempting to actually read from the underlying connection for each message, when ends
 * up making a final "empty" read from the non-blocking connection, rather than simply
 * consuming all buffered data.
 * 
 * TODO: It would be ideal if there was a way to consume data as we go, instead of buffering
 * it all then consuming it. However, this only matters for streams of medium-sized messages
 * with a huge backlog, which should be rare? The C++ implementation has a similar issue.
 * 
 * @param builder message builder to be parsed
 * @return true if a message was read, false if there is not enough buffered data to read a
 *      message.
 */
public boolean readBufferedMessage(MessageLite.Builder builder) {
    try {
        if (nextMessageLength == -1) {
            if (connection.available() < 4) {
                return false;
            }

            input.setLimit(4);
            nextMessageLength = codedInput.readRawLittleEndian32();
        }
        assert nextMessageLength >= 0;

        if (connection.available() < nextMessageLength) {
            assert 0 <= connection.available() && connection.available() < nextMessageLength;
            return false;
        }

        // Parse the response for the next RPC
        // TODO: Add .available() to CodedInputStream to avoid many copies to internal buffer?
        // or make CodedInputStream wrap a non-blocking interface like C++?
        input.setLimit(nextMessageLength);
        builder.mergeFrom(codedInput);
        assert codedInput.isAtEnd();
        codedInput.resetSizeCounter();
        nextMessageLength = -1;
        return true;
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}