| /** |
| * 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.tajo.client; |
| |
| import org.apache.tajo.SessionVars; |
| import org.apache.tajo.rpc.RpcConstants; |
| import org.apache.tajo.util.Pair; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.apache.tajo.SessionVars.COMPRESSED_RESULT_TRANSFER; |
| import static org.apache.tajo.SessionVars.FETCH_ROWNUM; |
| import static org.apache.tajo.SessionVars.TIMEZONE; |
| import static org.apache.tajo.client.ClientParameterHelper.ActionType.CONNECTION_PARAM; |
| import static org.apache.tajo.client.ClientParameterHelper.ActionType.SESSION_UPDATE; |
| import static org.apache.tajo.rpc.RpcConstants.CLIENT_CONNECTION_TIMEOUT; |
| import static org.apache.tajo.rpc.RpcConstants.CLIENT_SOCKET_TIMEOUT; |
| |
| /** |
| * <ul> |
| * <li><code>useCompression=bool</code> - Enable compressed transfer for ResultSet. </li> |
| * <li><code>defaultRowFetchSize=int</code> - Determine the number of rows fetched in ResultSet by |
| * one fetch with trip to the Server.</li> |
| * <li><code>connectTimeout=int</code> - The timeout value used for socket connect operations. |
| * If connecting to the server takes longer than this value,the connection is broken. The |
| * timeout is specified in seconds and a value of zero means that it is disabled.</li> |
| * <li><code>socketTimeout=int</code></li> - The timeout value used for socket read operations. |
| * If reading from the server takes longer than this value, the connection is closed. |
| * This can be used as both a brute force global query timeout and a method of detecting |
| * network problems. The timeout is specified in seconds and a value of zero means that |
| * it is disabled.</li> |
| * <li><code>retry=int</code>Number of retry operation. Tajo JDBC driver is resilient |
| * against some network or connection problems. It determines how many times the connection will retry.</li> |
| * </ul> |
| */ |
| class ClientParameterHelper { |
| |
| public static Map<String, Action> PARAMETERS = new HashMap<>(); |
| |
| static { |
| PARAMETERS.put(ClientParameters.USE_COMPRESSION, new SimpleSessionAction(COMPRESSED_RESULT_TRANSFER)); |
| PARAMETERS.put(ClientParameters.ROW_FETCH_SIZE, new SimpleSessionAction(FETCH_ROWNUM)); |
| PARAMETERS.put(ClientParameters.CONNECT_TIMEOUT, new ConnectionParamAction() { |
| @Override |
| Pair<String, String> doAction(String param) { |
| int seconds = Integer.parseInt(param); |
| // convert seconds into mili seconds |
| return new Pair<>(CLIENT_CONNECTION_TIMEOUT, String.valueOf(TimeUnit.SECONDS.toMillis(seconds))); |
| } |
| }); |
| PARAMETERS.put(ClientParameters.SOCKET_TIMEOUT, new ConnectionParamAction() { |
| @Override |
| Pair<String, String> doAction(String param) { |
| int seconds = Integer.parseInt(param); |
| return new Pair<>(CLIENT_SOCKET_TIMEOUT, String.valueOf(TimeUnit.SECONDS.toMillis(seconds))); |
| } |
| }); |
| PARAMETERS.put(ClientParameters.RETRY, new SimpleConnectionParamAction(RpcConstants.CLIENT_RETRY_NUM)); |
| PARAMETERS.put(ClientParameters.TIMEZONE, new SimpleSessionAction(TIMEZONE)); |
| } |
| |
| enum ActionType { |
| SESSION_UPDATE, |
| CONNECTION_PARAM |
| } |
| |
| interface Action { |
| ActionType type(); |
| } |
| |
| static class SimpleSessionAction extends SessionAction { |
| private final String sessionKey; |
| |
| SimpleSessionAction(SessionVars sessionVar) { |
| this.sessionKey = sessionVar.name(); |
| } |
| |
| Pair<String, String> doAction(String param) { |
| return new Pair<>(sessionKey, param); |
| } |
| } |
| |
| @SuppressWarnings("unused") |
| static abstract class SessionAction implements Action { |
| |
| @Override |
| public ActionType type() { |
| return SESSION_UPDATE; |
| } |
| |
| abstract Pair<String, String> doAction(String param); |
| } |
| |
| static class SimpleConnectionParamAction extends ConnectionParamAction { |
| final String connParamKey; |
| |
| SimpleConnectionParamAction(String connParamKey) { |
| this.connParamKey = connParamKey; |
| } |
| |
| public Pair<String, String> doAction(String param) { |
| return new Pair<>(connParamKey, param); |
| } |
| } |
| |
| @SuppressWarnings("unused") |
| static abstract class ConnectionParamAction implements Action { |
| |
| @Override |
| public ActionType type() { |
| return ActionType.CONNECTION_PARAM; |
| } |
| |
| abstract Pair<String, String> doAction(String param); |
| } |
| |
| public static Properties getConnParams(Collection<Map.Entry<String, String>> properties) { |
| Properties connParams = new Properties(); |
| for (Map.Entry<String, String> entry : properties) { |
| if(PARAMETERS.containsKey(entry.getKey()) && PARAMETERS.get(entry.getKey()).type() == CONNECTION_PARAM) { |
| Pair<String, String> keyValue = |
| ((ConnectionParamAction)PARAMETERS.get(entry.getKey())).doAction(entry.getValue()); |
| connParams.put(keyValue.getFirst(), keyValue.getSecond()); |
| } |
| } |
| |
| return connParams; |
| } |
| |
| public static Map<String, String> getSessionVars(Collection<Map.Entry<String, String>> properties) { |
| Map<String, String> sessionVars = new HashMap<>(); |
| |
| for (Map.Entry<String, String> entry : properties) { |
| if(PARAMETERS.containsKey(entry.getKey()) && PARAMETERS.get(entry.getKey()).type() == SESSION_UPDATE) { |
| Pair<String, String> keyValue = |
| ((SessionAction)PARAMETERS.get(entry.getKey())).doAction(entry.getValue()); |
| sessionVars.put(keyValue.getFirst(), keyValue.getSecond()); |
| } |
| } |
| |
| return sessionVars; |
| } |
| } |