ARROW-7744: [Java][FlightRPC] JDBC Driver for Arrow Flight SQL

java/.gitignore

@@ -23,3 +23,6 @@ install_manifest.txt
 target/
 ?/
 !/c/
+
+# Generated properties file
+flight/flight-sql-jdbc-driver/src/main/resources/properties/flight.properties

java/dev/checkstyle/suppressions.xml

@@ -39,4 +39,6 @@
   <!-- Suppress certain checks requiring many code changes, that add little benefit -->
   <suppress checks="NoFinalizer|OverloadMethodsDeclarationOrder|VariableDeclarationUsageDistance" files=".*" />
 
+  <!-- No license header in generated file -->
+  <suppress checks="header" files="flight.properties"/>
 </suppressions>

java/flight/flight-sql-jdbc-driver/jdbc-spotbugs-exclude.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 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. -->
+
+<FindBugsFilter>
+    <!--  These elements are supposed to be mutable  -->
+    <Match>
+        <Package name="~org\.apache\.arrow\.driver\.jdbc\.accessor\.impl.*"/>
+        <Bug pattern="EI_EXPOSE_REP2"/>
+    </Match>
+    <Match>
+        <Class name="org.apache.arrow.driver.jdbc.client.ArrowFlightSqlClientHandler"/>
+        <Bug pattern="EI_EXPOSE_REP2"/>
+    </Match>
+    <Match>
+        <Class name="org.apache.arrow.driver.jdbc.utils.ConnectionWrapper"/>
+        <Bug pattern="EI_EXPOSE_REP2"/>
+    </Match>
+    <Match>
+        <Class name="org.apache.arrow.driver.jdbc.ArrowFlightJdbcDataSource"/>
+        <Bug pattern="EI_EXPOSE_REP2"/>
+    </Match>
+    <Match>
+        <Class name="org.apache.arrow.driver.jdbc.ArrowFlightJdbcCursor"/>
+        <Bug pattern="EI_EXPOSE_REP2"/>
+    </Match>
+
+    <Match>
+        <Class name="org.apache.arrow.driver.jdbc.ArrowFlightJdbcDataSource"/>
+        <Bug pattern="EI_EXPOSE_REP"/>
+    </Match>
+</FindBugsFilter>

java/flight/flight-sql-jdbc-driver/src/main/java/org/apache/arrow/driver/jdbc/ArrowFlightConnection.java

@@ -0,0 +1,189 @@
+/*
+ * 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.arrow.driver.jdbc;
+
+import static org.apache.arrow.driver.jdbc.utils.ArrowFlightConnectionConfigImpl.ArrowFlightConnectionProperty.replaceSemiColons;
+
+import java.sql.SQLException;
+import java.util.Properties;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.apache.arrow.driver.jdbc.client.ArrowFlightSqlClientHandler;
+import org.apache.arrow.driver.jdbc.utils.ArrowFlightConnectionConfigImpl;
+import org.apache.arrow.flight.FlightClient;
+import org.apache.arrow.memory.BufferAllocator;
+import org.apache.arrow.util.AutoCloseables;
+import org.apache.arrow.util.Preconditions;
+import org.apache.calcite.avatica.AvaticaConnection;
+import org.apache.calcite.avatica.AvaticaFactory;
+
+import io.netty.util.concurrent.DefaultThreadFactory;
+
+/**
+ * Connection to the Arrow Flight server.
+ */
+public final class ArrowFlightConnection extends AvaticaConnection {
+
+  private final BufferAllocator allocator;
+  private final ArrowFlightSqlClientHandler clientHandler;
+  private final ArrowFlightConnectionConfigImpl config;
+  private ExecutorService executorService;
+
+  /**
+   * Creates a new {@link ArrowFlightConnection}.
+   *
+   * @param driver        the {@link ArrowFlightJdbcDriver} to use.
+   * @param factory       the {@link AvaticaFactory} to use.
+   * @param url           the URL to use.
+   * @param properties    the {@link Properties} to use.
+   * @param config        the {@link ArrowFlightConnectionConfigImpl} to use.
+   * @param allocator     the {@link BufferAllocator} to use.
+   * @param clientHandler the {@link ArrowFlightSqlClientHandler} to use.
+   */
+  private ArrowFlightConnection(final ArrowFlightJdbcDriver driver, final AvaticaFactory factory,
+                                final String url, final Properties properties,
+                                final ArrowFlightConnectionConfigImpl config,
+                                final BufferAllocator allocator,
+                                final ArrowFlightSqlClientHandler clientHandler) {
+    super(driver, factory, url, properties);
+    this.config = Preconditions.checkNotNull(config, "Config cannot be null.");
+    this.allocator = Preconditions.checkNotNull(allocator, "Allocator cannot be null.");
+    this.clientHandler = Preconditions.checkNotNull(clientHandler, "Handler cannot be null.");
+  }
+
+  /**
+   * Creates a new {@link ArrowFlightConnection} to a {@link FlightClient}.
+   *
+   * @param driver     the {@link ArrowFlightJdbcDriver} to use.
+   * @param factory    the {@link AvaticaFactory} to use.
+   * @param url        the URL to establish the connection to.
+   * @param properties the {@link Properties} to use for this session.
+   * @param allocator  the {@link BufferAllocator} to use.
+   * @return a new {@link ArrowFlightConnection}.
+   * @throws SQLException on error.
+   */
+  static ArrowFlightConnection createNewConnection(final ArrowFlightJdbcDriver driver,
+                                                   final AvaticaFactory factory,
+                                                   String url, final Properties properties,
+                                                   final BufferAllocator allocator)
+      throws SQLException {
+    url = replaceSemiColons(url);
+    final ArrowFlightConnectionConfigImpl config = new ArrowFlightConnectionConfigImpl(properties);
+    final ArrowFlightSqlClientHandler clientHandler = createNewClientHandler(config, allocator);
+    return new ArrowFlightConnection(driver, factory, url, properties, config, allocator, clientHandler);
+  }
+
+  private static ArrowFlightSqlClientHandler createNewClientHandler(
+      final ArrowFlightConnectionConfigImpl config,
+      final BufferAllocator allocator) throws SQLException {
+    try {
+      return new ArrowFlightSqlClientHandler.Builder()
+          .withHost(config.getHost())
+          .withPort(config.getPort())
+          .withUsername(config.getUser())
+          .withPassword(config.getPassword())
+          .withTrustStorePath(config.getTrustStorePath())
+          .withTrustStorePassword(config.getTrustStorePassword())
+          .withSystemTrustStore(config.useSystemTrustStore())
+          .withBufferAllocator(allocator)
+          .withEncryption(config.useEncryption())
+          .withDisableCertificateVerification(config.getDisableCertificateVerification())
+          .withToken(config.getToken())
+          .withCallOptions(config.toCallOption())
+          .build();
+    } catch (final SQLException e) {
+      try {
+        allocator.close();
+      } catch (final Exception allocatorCloseEx) {
+        e.addSuppressed(allocatorCloseEx);
+      }
+      throw e;
+    }
+  }
+
+  void reset() throws SQLException {
+    // Clean up any open Statements
+    try {
+      AutoCloseables.close(statementMap.values());
+    } catch (final Exception e) {
+      throw AvaticaConnection.HELPER.createException(e.getMessage(), e);
+    }
+
+    statementMap.clear();
+
+    // Reset Holdability
+    this.setHoldability(this.metaData.getResultSetHoldability());
+
+    // Reset Meta
+    ((ArrowFlightMetaImpl) this.meta).setDefaultConnectionProperties();
+  }
+
+  /**
+   * Gets the client {@link #clientHandler} backing this connection.
+   *
+   * @return the handler.
+   */
+  ArrowFlightSqlClientHandler getClientHandler() throws SQLException {
+    return clientHandler;
+  }
+
+  /**
+   * Gets the {@link ExecutorService} of this connection.
+   *
+   * @return the {@link #executorService}.
+   */
+  synchronized ExecutorService getExecutorService() {
+    return executorService = executorService == null ?
+        Executors.newFixedThreadPool(config.threadPoolSize(),
+            new DefaultThreadFactory(getClass().getSimpleName())) :
+        executorService;
+  }
+
+  @Override
+  public Properties getClientInfo() {
+    final Properties copy = new Properties();
+    copy.putAll(info);
+    return copy;
+  }
+
+  @Override
+  public void close() throws SQLException {
+    if (executorService != null) {
+      executorService.shutdown();
+    }
+
+    try {
+      AutoCloseables.close(clientHandler);
+      allocator.getChildAllocators().forEach(AutoCloseables::closeNoChecked);
+      AutoCloseables.close(allocator);
+
+      super.close();
+    } catch (final Exception e) {
+      throw AvaticaConnection.HELPER.createException(e.getMessage(), e);
+    }
+  }
+
+  BufferAllocator getBufferAllocator() {
+    return allocator;
+  }
+
+  public ArrowFlightMetaImpl getMeta() {
+    return (ArrowFlightMetaImpl) this.meta;
+  }
+}

java/flight/flight-sql-jdbc-driver/src/main/java/org/apache/arrow/driver/jdbc/ArrowFlightInfoStatement.java

@@ -0,0 +1,40 @@
+/*
+ * 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.arrow.driver.jdbc;
+
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import org.apache.arrow.flight.FlightInfo;
+
+/**
+ * A {@link Statement} that deals with {@link FlightInfo}.
+ */
+public interface ArrowFlightInfoStatement extends Statement {
+
+  @Override
+  ArrowFlightConnection getConnection() throws SQLException;
+
+  /**
+   * Executes the query this {@link Statement} is holding.
+   *
+   * @return the {@link FlightInfo} for the results.
+   * @throws SQLException on error.
+   */
+  FlightInfo executeFlightInfoQuery() throws SQLException;
+}