SQL: Remove dependency for server's version from JDBC driver (elastic#30631)

Removes dependency for server's version from the JDBC driver code. This
should allow us to dramatically reduce driver's size by removing the
server dependency from the driver.

Relates elastic#29856

Author: imotov

x-pack/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/net/client/JdbcHttpClient.java

@@ -8,6 +8,7 @@
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.xpack.sql.client.HttpClient;
+import org.elasticsearch.xpack.sql.client.shared.Version;
 import org.elasticsearch.xpack.sql.jdbc.jdbc.JdbcConfiguration;
 import org.elasticsearch.xpack.sql.jdbc.net.protocol.ColumnInfo;
 import org.elasticsearch.xpack.sql.jdbc.net.protocol.InfoResponse;
@@ -79,7 +80,8 @@ public InfoResponse serverInfo() throws SQLException {
 
     private InfoResponse fetchServerInfo() throws SQLException {
         MainResponse mainResponse = httpClient.serverInfo();
-        return new InfoResponse(mainResponse.getClusterName(), mainResponse.getVersion().major, mainResponse.getVersion().minor);
+        Version version = Version.fromString(mainResponse.getVersion());
+        return new InfoResponse(mainResponse.getClusterName(), version.major, version.minor);
     }
 
     /**

x-pack/plugin/sql/sql-cli/src/main/java/org/elasticsearch/xpack/sql/cli/command/CliSession.java

@@ -65,8 +65,9 @@ public void checkConnection() throws ClientException {
         } catch (SQLException ex) {
             throw new ClientException(ex);
         }
+        Version version = Version.fromString(response.getVersion());
         // TODO: We can relax compatibility requirement later when we have a better idea about protocol compatibility guarantees
-        if (response.getVersion().major != Version.CURRENT.major || response.getVersion().minor != Version.CURRENT.minor) {
+        if (version.major != Version.CURRENT.major || version.minor != Version.CURRENT.minor) {
             throw new ClientException("This alpha version of CLI is only compatible with Elasticsearch version " +
                     Version.CURRENT.toString());
         }

x-pack/plugin/sql/sql-cli/src/main/java/org/elasticsearch/xpack/sql/cli/command/ServerInfoCliCommand.java

@@ -31,7 +31,7 @@ public boolean doHandle(CliTerminal terminal, CliSession cliSession, String line
         terminal.line()
                 .text("Node:").em(info.getNodeName())
                 .text(" Cluster:").em(info.getClusterName())
-                .text(" Version:").em(info.getVersion().toString())
+                .text(" Version:").em(info.getVersion())
                 .ln();
         return true;
     }

x-pack/plugin/sql/sql-cli/src/test/java/org/elasticsearch/xpack/sql/cli/CliSessionTests.java

@@ -27,7 +27,7 @@ public class CliSessionTests extends ESTestCase {
 
     public void testProperConnection() throws Exception {
         HttpClient httpClient = mock(HttpClient.class);
-        when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5), org.elasticsearch.Version.CURRENT,
+        when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5), org.elasticsearch.Version.CURRENT.toString(),
                 ClusterName.DEFAULT.value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         CliSession cliSession = new CliSession(httpClient);
         cliSession.checkConnection();
@@ -57,7 +57,7 @@ public void testWrongServerVersion() throws Exception {
 
         }
         when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5),
-                org.elasticsearch.Version.fromString(major + "." + minor + ".23"),
+                org.elasticsearch.Version.fromString(major + "." + minor + ".23").toString(),
                 ClusterName.DEFAULT.value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         CliSession cliSession = new CliSession(httpClient);
         expectThrows(ClientException.class, cliSession::checkConnection);

x-pack/plugin/sql/sql-cli/src/test/java/org/elasticsearch/xpack/sql/cli/command/ServerInfoCliCommandTests.java

@@ -35,7 +35,7 @@ public void testShowInfo() throws Exception {
         TestTerminal testTerminal = new TestTerminal();
         HttpClient client = mock(HttpClient.class);
         CliSession cliSession = new CliSession(client);
-        when(client.serverInfo()).thenReturn(new MainResponse("my_node", org.elasticsearch.Version.fromString("1.2.3"),
+        when(client.serverInfo()).thenReturn(new MainResponse("my_node", "1.2.3",
                 new ClusterName("my_cluster").value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         ServerInfoCliCommand cliCommand = new ServerInfoCliCommand();
         assertTrue(cliCommand.handle(testTerminal, cliSession, "info"));

x-pack/plugin/sql/sql-proto/src/main/java/org/elasticsearch/xpack/sql/proto/MainResponse.java

@@ -7,7 +7,6 @@
 package org.elasticsearch.xpack.sql.proto;
 
 import org.elasticsearch.Build;
-import org.elasticsearch.Version;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ObjectParser;
 import org.elasticsearch.common.xcontent.XContentParser;
@@ -19,8 +18,7 @@
  */
 public class MainResponse {
     private String nodeName;
-    // TODO: Add parser for Version
-    private Version version;
+    private String version;
     private String clusterName;
     private String clusterUuid;
     // TODO: Add parser for Build
@@ -29,7 +27,7 @@ public class MainResponse {
     private MainResponse() {
     }
 
-    public MainResponse(String nodeName, Version version, String clusterName, String clusterUuid, Build build) {
+    public MainResponse(String nodeName, String version, String clusterName, String clusterUuid, Build build) {
         this.nodeName = nodeName;
         this.version = version;
         this.clusterName = clusterName;
@@ -41,7 +39,7 @@ public String getNodeName() {
         return nodeName;
     }
 
-    public Version getVersion() {
+    public String getVersion() {
         return version;
     }
 
@@ -76,7 +74,7 @@ public Build getBuild() {
                     (String) value.get("build_hash"),
                     (String) value.get("build_date"),
                     (boolean) value.get("build_snapshot"));
-            response.version = Version.fromString((String) value.get("number"));
+            response.version = (String) value.get("number");
         }, (parser, context) -> parser.map(), new ParseField("version"));
     }