Upgrade HBase community connector for Dremio 4.2.x

- Bumped the dremio version to 4.2.x
- Upgraded protobuf and protobuf-maven-plugin versions
- Refactored some method signatures to ensure code compiles successfully.

README.md

@@ -2,3 +2,27 @@
 
 [![Build Status](https://travis-ci.org/dremio-hub/dremio-hbase-connector.svg?branch=master)](https://travis-ci.org/dremio-hub/dremio-hbase-connector)
 
+## Building and Installation
+
+To add the Dremio Community HBase Connector to the list of Dremio sources:
+
+1. From the project root, run `mvn clean install`. 
+   The HBase Connector `dremio-hbase-plugin-4.2.2-202004211133290458-b550b6fa.jar` appears in the `target` directory.
+
+1. Copy `dremio-hbase-plugin-4.2.2-202004211133290458-b550b6fa.jar` to the `<DREMIO_HOME>/jars` folder on all Dremio
+ nodes.
+
+1. Run `<DREMIO_HOME>/bin/stop` to stop Dremio.
+
+1. Download and copy the following jars to the `<DREMIO_HOME>/jars/3rdparty` folder on all Dremio nodes.
+    * [hbase-client-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/hbase-client/2.2.0/hbase-client-2.2.0.jar)
+    * [hbase-common-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/hbase-common/2.2.0/hbase-common-2.2.0.jar)
+    * [hbase-protocol-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/hbase-protocol/2.2.0/hbase-protocol-2.2.0.jar)
+    * [hbase-protocol-shaded-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/hbase-protocol-shaded/2.2.0/hbase-protocol-shaded-2.2.0.jar)
+    * [hbase-shaded-miscellaneous-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/thirdparty/hbase-shaded-miscellaneous/2.2.0/hbase-shaded-miscellaneous-2.2.0.jar)
+    * [hbase-shaded-netty-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/thirdparty/hbase-shaded-netty/2.2.0/hbase-shaded-netty-2.2.0.jar)
+    * [hbase-shaded-protobuf-2.2.0.jar](https://repo1.maven.org/maven2/org/apache/hbase/thirdparty/hbase-shaded-protobuf/2.2.0/hbase-shaded-protobuf-2.2.0.jar)
+
+1. Run `<DREMIO_HOME>/bin/start` to start Dremio.
+
+You now have the HBase Connector available in the list of sources on the Dremio UI.

pom.xml

@@ -20,14 +20,14 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>com.dremio.plugin</groupId>
-  <version>4.0.0-201909121834570395-c7a5071</version>
+  <version>4.2.2-202004211133290458-b550b6fa</version>
   <artifactId>dremio-hbase-plugin</artifactId>
 
   <name>Dremio HBase Community Connector</name>
 
   <properties>
     <hbase.TestSuite>**/HBaseTestsSuite.class</hbase.TestSuite>
-    <version.dremio>4.0.0-201909121834570395-c7a5071</version.dremio>
+    <version.dremio>4.2.2-202004211133290458-b550b6fa</version.dremio>
   </properties>
 
   <dependencies>
@@ -111,7 +111,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>2.5.0</version>
+      <version>3.9.1</version>
     </dependency>
 
   </dependencies>
@@ -142,7 +142,7 @@
       <plugin>
         <groupId>org.xolstice.maven.plugins</groupId>
         <artifactId>protobuf-maven-plugin</artifactId>
-        <version>0.5.0</version>
+        <version>0.6.1</version>
         <configuration>
           <protoSourceRoot>${basedir}/src/main/proto</protoSourceRoot>
         </configuration>

src/main/java/com/dremio/exec/store/hbase/HBaseRecordReader.java

@@ -129,7 +129,7 @@ public HBaseRecordReader(
     }
   }
 
-  public void setNumRowsPerBatch(long numRowsPerBatch) {
+  public void setNumRowsPerBatch(int numRowsPerBatch) {
     this.numRowsPerBatch = numRowsPerBatch;
   }
 

src/main/java/com/dremio/exec/store/hbase/HBaseScanDrel.java

@@ -39,7 +39,7 @@ public HBaseScanDrel(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable ta
 
   @Override
   public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) {
-    return new HBaseScanDrel(getCluster(), traitSet, table, pluginId, tableMetadata, projectedColumns, observedRowcountAdjustment);
+    return new HBaseScanDrel(getCluster(), traitSet, table, pluginId, tableMetadata, getProjectedColumns(), observedRowcountAdjustment);
   }
 
   @Override