| /* |
| * 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.drill.exec.rpc.control; |
| |
| import com.google.protobuf.MessageLite; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.socket.SocketChannel; |
| |
| import org.apache.drill.exec.proto.BitControl.RpcType; |
| import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint; |
| import org.apache.drill.exec.rpc.AbstractServerConnection; |
| import org.apache.drill.exec.rpc.ClientConnection; |
| import org.apache.drill.exec.rpc.RequestHandler; |
| import org.apache.drill.exec.rpc.RpcBus; |
| import org.apache.drill.exec.rpc.RpcException; |
| import org.apache.drill.exec.rpc.RpcOutcomeListener; |
| import org.apache.drill.exec.rpc.SaslCodec; |
| |
| import org.slf4j.Logger; |
| |
| import javax.security.sasl.SaslClient; |
| import javax.security.sasl.SaslException; |
| import java.util.UUID; |
| |
| import static com.google.common.base.Preconditions.checkState; |
| |
| public class ControlConnection extends AbstractServerConnection<ControlConnection> implements ClientConnection { |
| private static final Logger logger = org.slf4j.LoggerFactory.getLogger(ControlConnection.class); |
| |
| private final RpcBus<RpcType, ControlConnection> bus; |
| private final UUID id; |
| |
| private volatile DrillbitEndpoint endpoint; |
| private volatile boolean active = false; |
| |
| private SaslClient saslClient; |
| |
| ControlConnection(SocketChannel channel, String name, ControlConnectionConfig config, |
| RequestHandler<ControlConnection> handler, RpcBus<RpcType, ControlConnection> bus) { |
| super(channel, name, config, handler); |
| this.bus = bus; |
| this.id = UUID.randomUUID(); |
| } |
| |
| void setEndpoint(DrillbitEndpoint endpoint) { |
| assert this.endpoint == null : "Endpoint should only be set once (only in the case in incoming server requests)."; |
| this.endpoint = endpoint; |
| active = true; |
| } |
| |
| public <SEND extends MessageLite, RECEIVE extends MessageLite> |
| void send(RpcOutcomeListener<RECEIVE> outcomeListener, RpcType rpcType, SEND protobufBody, |
| Class<RECEIVE> clazz, ByteBuf... dataBodies) { |
| bus.send(outcomeListener, this, rpcType, protobufBody, clazz, dataBodies); |
| } |
| |
| public <SEND extends MessageLite, RECEIVE extends MessageLite> |
| void sendUnsafe(RpcOutcomeListener<RECEIVE> outcomeListener, RpcType rpcType, SEND protobufBody, |
| Class<RECEIVE> clazz, ByteBuf... dataBodies) { |
| bus.send(outcomeListener, this, rpcType, protobufBody, clazz, true, dataBodies); |
| } |
| |
| @Override |
| public boolean isActive() { |
| return active && super.isActive(); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((id == null) ? 0 : id.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| ControlConnection other = (ControlConnection) obj; |
| if (id == null) { |
| if (other.id != null) { |
| return false; |
| } |
| } else if (!id.equals(other.id)) { |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| protected Logger getLogger() { |
| return logger; |
| } |
| |
| @Override |
| public void setSaslClient(final SaslClient saslClient) { |
| checkState(this.saslClient == null); |
| this.saslClient = saslClient; |
| |
| // If encryption is enabled set the backend wrapper instance corresponding to this SaslClient in the connection |
| // object. This is later used to do wrap/unwrap in handlers. |
| if (isEncryptionEnabled()) { |
| saslCodec = new SaslCodec() { |
| @Override |
| public byte[] wrap(byte[] data, int offset, int len) throws SaslException { |
| assert saslClient != null; |
| return saslClient.wrap(data, offset, len); |
| } |
| |
| @Override |
| public byte[] unwrap(byte[] data, int offset, int len) throws SaslException { |
| assert saslClient != null; |
| return saslClient.unwrap(data, offset, len); |
| } |
| }; |
| } |
| } |
| |
| @Override |
| public SaslClient getSaslClient() { |
| checkState(saslClient != null); |
| return saslClient; |
| } |
| |
| @Override |
| public void disposeSaslClient() { |
| try { |
| if (saslClient != null) { |
| saslClient.dispose(); |
| saslClient = null; |
| } |
| } catch (final SaslException e) { |
| getLogger().warn("Unclean disposal", e); |
| } |
| } |
| |
| @Override |
| public void channelClosed(RpcException ex) { |
| // This will be triggered from Netty when a channel is closed. We should cleanup here |
| // as this will handle case for both client closing the connection or server closing the |
| // connection. |
| disposeSaslClient(); |
| |
| super.channelClosed(ex); |
| } |
| |
| @Override |
| public void incConnectionCounter() { |
| ControlRpcMetrics.getInstance().addConnectionCount(); |
| } |
| |
| @Override |
| public void decConnectionCounter() { |
| ControlRpcMetrics.getInstance().decConnectionCount(); |
| } |
| } |