| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.transport.messages; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import io.netty.buffer.ByteBuf; |
| |
| import org.apache.cassandra.service.QueryState; |
| import org.apache.cassandra.transport.*; |
| |
| public class RegisterMessage extends Message.Request |
| { |
| public static final Message.Codec<RegisterMessage> codec = new Message.Codec<RegisterMessage>() |
| { |
| public RegisterMessage decode(ByteBuf body, ProtocolVersion version) |
| { |
| int length = body.readUnsignedShort(); |
| List<Event.Type> eventTypes = new ArrayList<>(length); |
| for (int i = 0; i < length; ++i) |
| eventTypes.add(CBUtil.readEnumValue(Event.Type.class, body)); |
| return new RegisterMessage(eventTypes); |
| } |
| |
| public void encode(RegisterMessage msg, ByteBuf dest, ProtocolVersion version) |
| { |
| dest.writeShort(msg.eventTypes.size()); |
| for (Event.Type type : msg.eventTypes) |
| CBUtil.writeEnumValue(type, dest); |
| } |
| |
| public int encodedSize(RegisterMessage msg, ProtocolVersion version) |
| { |
| int size = 2; |
| for (Event.Type type : msg.eventTypes) |
| size += CBUtil.sizeOfEnumValue(type); |
| return size; |
| } |
| }; |
| |
| public final List<Event.Type> eventTypes; |
| |
| public RegisterMessage(List<Event.Type> eventTypes) |
| { |
| super(Message.Type.REGISTER); |
| this.eventTypes = eventTypes; |
| } |
| |
| public Response execute(QueryState state, long queryStartNanoTime) |
| { |
| assert connection instanceof ServerConnection; |
| Connection.Tracker tracker = connection.getTracker(); |
| assert tracker instanceof Server.ConnectionTracker; |
| for (Event.Type type : eventTypes) |
| { |
| if (type.minimumVersion.isGreaterThan(connection.getVersion())) |
| throw new ProtocolException("Event " + type.name() + " not valid for protocol version " + connection.getVersion()); |
| ((Server.ConnectionTracker) tracker).register(type, connection().channel()); |
| } |
| return new ReadyMessage(); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "REGISTER " + eventTypes; |
| } |
| } |