GH-34532: [Java][FlightSQL] Change JDBC to handle multi-endpoints (#3…

…8521)

### Rationale for this change
The Flight SQL JDBC Driver currently doesn't fetch at multiple endpoints correctly when the data is not at the same location as the original connection.

### What changes are included in this PR?
- Create new clients to connect to new locations in endpoints.
- If no location is reported using the current connection.
- Make ArrowFlightSqlClientHandler's builder's build() function to be idempodent.
- Add functionality to clone ArrowFlightSqClientHandler's builder so that it can be used for temporary connections to locations returned by getFlightInfo().
- Add utility classes in unit tests for constructing a distributed Flight SQL Server

### Are these changes tested?
Yes.

### Are there any user-facing changes?
The behavior for when there are reported endpoints from getFlightInfo is now fixed. However if users relied on the previous behavior of just getting streams from the same node, and their server only ever reported the original node, they may observe more Flight client connections opening and closing than before (since new connections get spawned for each partition that has at least one Location now).

* Closes: #34532

Authored-by: James Duong <james.duong@improving.com>
Signed-off-by: David Li <li.davidm96@gmail.com>

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

@@ -17,7 +17,7 @@
 
 package org.apache.arrow.driver.jdbc;
 
-import static org.apache.arrow.driver.jdbc.utils.FlightStreamQueue.createNewQueue;
+import static org.apache.arrow.driver.jdbc.utils.FlightEndpointDataQueue.createNewQueue;
 
 import java.sql.ResultSet;
 import java.sql.ResultSetMetaData;
@@ -26,7 +26,8 @@
 import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.arrow.driver.jdbc.utils.FlightStreamQueue;
+import org.apache.arrow.driver.jdbc.client.CloseableEndpointStreamPair;
+import org.apache.arrow.driver.jdbc.utils.FlightEndpointDataQueue;
 import org.apache.arrow.driver.jdbc.utils.VectorSchemaRootTransformer;
 import org.apache.arrow.flight.FlightInfo;
 import org.apache.arrow.flight.FlightStream;
@@ -47,8 +48,8 @@ public final class ArrowFlightJdbcFlightStreamResultSet
     extends ArrowFlightJdbcVectorSchemaRootResultSet {
 
   private final ArrowFlightConnection connection;
-  private FlightStream currentFlightStream;
-  private FlightStreamQueue flightStreamQueue;
+  private CloseableEndpointStreamPair currentEndpointData;
+  private FlightEndpointDataQueue flightEndpointDataQueue;
 
   private VectorSchemaRootTransformer transformer;
   private VectorSchemaRoot currentVectorSchemaRoot;
@@ -102,20 +103,20 @@ static ArrowFlightJdbcFlightStreamResultSet fromFlightInfo(
 
     resultSet.transformer = transformer;
 
-    resultSet.execute(flightInfo);
+    resultSet.populateData(flightInfo);
     return resultSet;
   }
 
   private void loadNewQueue() {
-    Optional.ofNullable(flightStreamQueue).ifPresent(AutoCloseables::closeNoChecked);
-    flightStreamQueue = createNewQueue(connection.getExecutorService());
+    Optional.ofNullable(flightEndpointDataQueue).ifPresent(AutoCloseables::closeNoChecked);
+    flightEndpointDataQueue = createNewQueue(connection.getExecutorService());
   }
 
   private void loadNewFlightStream() throws SQLException {
-    if (currentFlightStream != null) {
-      AutoCloseables.closeNoChecked(currentFlightStream);
+    if (currentEndpointData != null) {
+      AutoCloseables.closeNoChecked(currentEndpointData);
     }
-    this.currentFlightStream = getNextFlightStream(true);
+    this.currentEndpointData = getNextEndpointStream(true);
   }
 
   @Override
@@ -124,24 +125,24 @@ protected AvaticaResultSet execute() throws SQLException {
 
     if (flightInfo != null) {
       schema = flightInfo.getSchemaOptional().orElse(null);
-      execute(flightInfo);
+      populateData(flightInfo);
     }
     return this;
   }
 
-  private void execute(final FlightInfo flightInfo) throws SQLException {
+  private void populateData(final FlightInfo flightInfo) throws SQLException {
     loadNewQueue();
-    flightStreamQueue.enqueue(connection.getClientHandler().getStreams(flightInfo));
+    flightEndpointDataQueue.enqueue(connection.getClientHandler().getStreams(flightInfo));
     loadNewFlightStream();
 
     // Ownership of the root will be passed onto the cursor.
-    if (currentFlightStream != null) {
-      executeForCurrentFlightStream();
+    if (currentEndpointData != null) {
+      populateDataForCurrentFlightStream();
     }
   }
 
-  private void executeForCurrentFlightStream() throws SQLException {
-    final VectorSchemaRoot originalRoot = currentFlightStream.getRoot();
+  private void populateDataForCurrentFlightStream() throws SQLException {
+    final VectorSchemaRoot originalRoot = currentEndpointData.getStream().getRoot();
 
     if (transformer != null) {
       try {
@@ -154,9 +155,9 @@ private void executeForCurrentFlightStream() throws SQLException {
     }
 
     if (schema != null) {
-      execute(currentVectorSchemaRoot, schema);
+      populateData(currentVectorSchemaRoot, schema);
     } else {
-      execute(currentVectorSchemaRoot);
+      populateData(currentVectorSchemaRoot);
     }
   }
 
@@ -179,20 +180,20 @@ public boolean next() throws SQLException {
         return true;
       }
 
-      if (currentFlightStream != null) {
-        currentFlightStream.getRoot().clear();
-        if (currentFlightStream.next()) {
-          executeForCurrentFlightStream();
+      if (currentEndpointData != null) {
+        currentEndpointData.getStream().getRoot().clear();
+        if (currentEndpointData.getStream().next()) {
+          populateDataForCurrentFlightStream();
           continue;
         }
 
-        flightStreamQueue.enqueue(currentFlightStream);
+        flightEndpointDataQueue.enqueue(currentEndpointData);
       }
 
-      currentFlightStream = getNextFlightStream(false);
+      currentEndpointData = getNextEndpointStream(false);
 
-      if (currentFlightStream != null) {
-        executeForCurrentFlightStream();
+      if (currentEndpointData != null) {
+        populateDataForCurrentFlightStream();
         continue;
       }
 
@@ -207,14 +208,14 @@ public boolean next() throws SQLException {
   @Override
   protected void cancel() {
     super.cancel();
-    final FlightStream currentFlightStream = this.currentFlightStream;
-    if (currentFlightStream != null) {
-      currentFlightStream.cancel("Cancel", null);
+    final CloseableEndpointStreamPair currentEndpoint = this.currentEndpointData;
+    if (currentEndpoint != null) {
+      currentEndpoint.getStream().cancel("Cancel", null);
     }
 
-    if (flightStreamQueue != null) {
+    if (flightEndpointDataQueue != null) {
       try {
-        flightStreamQueue.close();
+        flightEndpointDataQueue.close();
       } catch (final Exception e) {
         throw new RuntimeException(e);
       }
@@ -224,27 +225,28 @@ protected void cancel() {
   @Override
   public synchronized void close() {
     try {
-      if (flightStreamQueue != null) {
+      if (flightEndpointDataQueue != null) {
         // flightStreamQueue should close currentFlightStream internally
-        flightStreamQueue.close();
-      } else if (currentFlightStream != null) {
+        flightEndpointDataQueue.close();
+      } else if (currentEndpointData != null) {
         // close is only called for currentFlightStream if there's no queue
-        currentFlightStream.close();
+        currentEndpointData.close();
       }
+
     } catch (final Exception e) {
       throw new RuntimeException(e);
     } finally {
       super.close();
     }
   }
 
-  private FlightStream getNextFlightStream(final boolean isExecution) throws SQLException {
-    if (isExecution) {
+  private CloseableEndpointStreamPair getNextEndpointStream(final boolean canTimeout) throws SQLException {
+    if (canTimeout) {
       final int statementTimeout = statement != null ? statement.getQueryTimeout() : 0;
       return statementTimeout != 0 ?
-          flightStreamQueue.next(statementTimeout, TimeUnit.SECONDS) : flightStreamQueue.next();
+          flightEndpointDataQueue.next(statementTimeout, TimeUnit.SECONDS) : flightEndpointDataQueue.next();
     } else {
-      return flightStreamQueue.next();
+      return flightEndpointDataQueue.next();
     }
   }
 }

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

@@ -83,7 +83,7 @@ public static ArrowFlightJdbcVectorSchemaRootResultSet fromVectorSchemaRoot(
         new ArrowFlightJdbcVectorSchemaRootResultSet(null, state, signature, resultSetMetaData,
             timeZone, null);
 
-    resultSet.execute(vectorSchemaRoot);
+    resultSet.populateData(vectorSchemaRoot);
     return resultSet;
   }
 
@@ -92,7 +92,7 @@ protected AvaticaResultSet execute() throws SQLException {
     throw new RuntimeException("Can only execute with execute(VectorSchemaRoot)");
   }
 
-  void execute(final VectorSchemaRoot vectorSchemaRoot) {
+  void populateData(final VectorSchemaRoot vectorSchemaRoot) {
     final List<Field> fields = vectorSchemaRoot.getSchema().getFields();
     final List<ColumnMetaData> columns = ConvertUtils.convertArrowFieldsToColumnMetaDataList(fields);
     signature.columns.clear();
@@ -102,7 +102,7 @@ void execute(final VectorSchemaRoot vectorSchemaRoot) {
     execute2(new ArrowFlightJdbcCursor(vectorSchemaRoot), this.signature.columns);
   }
 
-  void execute(final VectorSchemaRoot vectorSchemaRoot, final Schema schema) {
+  void populateData(final VectorSchemaRoot vectorSchemaRoot, final Schema schema) {
     final List<ColumnMetaData> columns = ConvertUtils.convertArrowFieldsToColumnMetaDataList(schema.getFields());
     signature.columns.clear();
     signature.columns.addAll(columns);