AMashenkov commented on a change in pull request #284: URL: https://github.com/apache/ignite-3/pull/284#discussion_r700068482
########## File path: modules/client/src/main/java/org/apache/ignite/jdbc/JdbcConnection.java ########## @@ -0,0 +1,753 @@ +/* + * 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.ignite.jdbc; + +import java.sql.Array; +import java.sql.Blob; +import java.sql.CallableStatement; +import java.sql.Clob; +import java.sql.Connection; +import java.sql.DatabaseMetaData; +import java.sql.NClob; +import java.sql.PreparedStatement; +import java.sql.SQLClientInfoException; +import java.sql.SQLException; +import java.sql.SQLFeatureNotSupportedException; +import java.sql.SQLPermission; +import java.sql.SQLWarning; +import java.sql.SQLXML; +import java.sql.Savepoint; +import java.sql.ShardingKey; +import java.sql.Statement; +import java.sql.Struct; +import java.util.Arrays; +import java.util.Collections; +import java.util.IdentityHashMap; +import java.util.Map; +import java.util.Properties; +import java.util.Set; +import java.util.concurrent.Executor; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.client.proto.query.JdbcQueryEventHandler; +import org.apache.ignite.client.proto.query.SqlStateCode; +import org.apache.ignite.internal.client.HostAndPortRange; +import org.apache.ignite.internal.client.TcpIgniteClient; +import org.apache.ignite.internal.client.query.JdbcClientQueryEventHandler; +import org.jetbrains.annotations.Nullable; + +import static java.sql.ResultSet.CLOSE_CURSORS_AT_COMMIT; +import static java.sql.ResultSet.CONCUR_READ_ONLY; +import static java.sql.ResultSet.HOLD_CURSORS_OVER_COMMIT; +import static java.sql.ResultSet.TYPE_FORWARD_ONLY; +import static org.apache.ignite.client.proto.query.SqlStateCode.CONNECTION_CLOSED; + +/** + * JDBC connection implementation. + */ +public class JdbcConnection implements Connection { + /** Default schema. */ + public static final String DFLT_SCHEMA = "PUBLIC"; + + /** Network timeout permission. */ + private static final String SET_NETWORK_TIMEOUT_PERM = "setNetworkTimeout"; + + /** Statements modification mutex. */ + private final Object stmtsMux = new Object(); + + /** Handler. */ + private final JdbcQueryEventHandler handler; + + /** Schema name. */ + private String schema; + + /** Closed flag. */ + private volatile boolean closed; + + /** Current transaction isolation. */ + private int txIsolation; + + /** Auto-commit flag. */ + private boolean autoCommit; + + /** Read-only flag. */ + private boolean readOnly; + + /** Current transaction holdability. */ + private int holdability; + + /** Connection properties. */ + private final ConnectionProperties connProps; + + /** Tracked statements to close on disconnect. */ + private final Set<JdbcStatement> stmts = Collections.newSetFromMap(new IdentityHashMap<>()); + + /** Network timeout. */ + private int netTimeout; + + /** Query timeout. */ + private final @Nullable Integer qryTimeout; + + /** Ignite remote client. */ + private final TcpIgniteClient client; + + /** + * Constructor. + * + * @param handler Handler. + * @param props Properties. + */ + public JdbcConnection(JdbcQueryEventHandler handler, ConnectionProperties props) { + this.connProps = props; + this.handler = handler; + + autoCommit = true; + + netTimeout = connProps.getConnectionTimeout(); + qryTimeout = connProps.getQueryTimeout(); + + holdability = HOLD_CURSORS_OVER_COMMIT; + + schema = DFLT_SCHEMA; + + client = null; + } + + /** + * Creates new connection. + * + * @param props Connection properties. + */ + public JdbcConnection(ConnectionProperties props) { + this.connProps = props; + autoCommit = true; + + var objects = Arrays.stream(props.getAddresses()).map(HostAndPortRange::toString).toArray(String[]::new); + + client = ((TcpIgniteClient)IgniteClient + .builder() + .addresses(objects) + .build()); + + this.handler = new JdbcClientQueryEventHandler(client); + + txIsolation = Connection.TRANSACTION_NONE; + + schema = normalizeSchema(connProps.getSchema()); + + netTimeout = connProps.getConnectionTimeout(); + qryTimeout = connProps.getQueryTimeout(); + + holdability = HOLD_CURSORS_OVER_COMMIT; + } + + /** {@inheritDoc} */ + @Override public Statement createStatement() throws SQLException { + return createStatement(TYPE_FORWARD_ONLY, CONCUR_READ_ONLY, HOLD_CURSORS_OVER_COMMIT); + } + + /** {@inheritDoc} */ + @Override public Statement createStatement(int resSetType, int resSetConcurrency) throws SQLException { + return createStatement(resSetType, resSetConcurrency, HOLD_CURSORS_OVER_COMMIT); + } + + /** {@inheritDoc} */ + @Override public Statement createStatement(int resSetType, int resSetConcurrency, + int resSetHoldability) throws SQLException { + ensureNotClosed(); + + checkCursorOptions(resSetType, resSetConcurrency); + + JdbcStatement stmt = new JdbcStatement(this, resSetHoldability, schema); + + if (qryTimeout != null) + stmt.setQueryTimeout(qryTimeout); + + synchronized (stmtsMux) { + stmts.add(stmt); + } + + return stmt; + } + + /** {@inheritDoc} */ + @Override public PreparedStatement prepareStatement(String sql) throws SQLException { + return prepareStatement(sql, TYPE_FORWARD_ONLY, CONCUR_READ_ONLY, HOLD_CURSORS_OVER_COMMIT); + } + + /** {@inheritDoc} */ + @Override public PreparedStatement prepareStatement(String sql, int resSetType, + int resSetConcurrency) throws SQLException { + return prepareStatement(sql, resSetType, resSetConcurrency, HOLD_CURSORS_OVER_COMMIT); + } + + /** {@inheritDoc} */ + @Override public PreparedStatement prepareStatement(String sql, int resSetType, int resSetConcurrency, + int resSetHoldability) throws SQLException { + ensureNotClosed(); + + checkCursorOptions(resSetType, resSetConcurrency); + + if (sql == null) + throw new SQLException("SQL string cannot be null."); Review comment: ```suggestion Objects.requireNonNull(sql); ``` -- This is an automated message from the Apache Git Service. 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