fix: bigtable-hbase-2.x-hadoop incompatible with hbase-shaded-client …

…2.x (googleapis#2773)

* fix: bigtable-hbase-2.x-hadoop incompatible with hbase-shaded-client 2.x

* test: unit tests for BigtableAdmin.getClusterStatus()

* fix: bigtable-hbase-2.x-hadoop incompatible with hbase-shaded-client 2.x

* fix: copyright header

bigtable-client-core-parent/bigtable-hbase/src/main/java/org/apache/hadoop/hbase/client/AbstractBigtableAdmin.java

@@ -41,16 +41,13 @@
 import io.grpc.Status;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.regex.Pattern;
 import javax.annotation.Nullable;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.ClusterStatus;
 import org.apache.hadoop.hbase.HBaseIOException;
 import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.apache.hadoop.hbase.HRegionInfo;
@@ -685,18 +682,6 @@ public void deleteColumn(final String tableName, final String columnName) throws
     deleteColumn(TableName.valueOf(tableName), Bytes.toBytes(columnName));
   }
 
-  /** {@inheritDoc} */
-  @Override
-  public ClusterStatus getClusterStatus() throws IOException {
-    return new ClusterStatus() {
-      @Override
-      public Collection<ServerName> getServers() {
-        // TODO(sduskis): Point the server name to options.getServerName()
-        return Collections.emptyList();
-      }
-    };
-  }
-
   /** {@inheritDoc} */
   @Override
   public Configuration getConfiguration() {

bigtable-hbase-1.x-parent/bigtable-hbase-1.x/src/main/java/com/google/cloud/bigtable/hbase1_x/BigtableAdmin.java

@@ -17,9 +17,12 @@
 
 import com.google.api.core.InternalApi;
 import java.io.IOException;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Future;
 import java.util.regex.Pattern;
+import org.apache.hadoop.hbase.ClusterStatus;
 import org.apache.hadoop.hbase.ProcedureInfo;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableExistsException;
@@ -258,4 +261,14 @@ public boolean[] setSplitOrMergeEnabled(boolean arg0, boolean arg1, MasterSwitch
       throws IOException {
     throw new UnsupportedOperationException("setSplitOrMergeEnabled"); // TODO
   }
+
+  @Override
+  public ClusterStatus getClusterStatus() throws IOException {
+    return new ClusterStatus() {
+      @Override
+      public Collection<ServerName> getServers() {
+        return Collections.emptyList();
+      }
+    };
+  }
 }

bigtable-hbase-1.x-parent/bigtable-hbase-1.x/src/test/java/com/google/cloud/bigtable/hbase1_x/TestBigtableAdmin.java

@@ -16,6 +16,7 @@
 package com.google.cloud.bigtable.hbase1_x;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 
 import com.google.bigtable.admin.v2.BigtableTableAdminGrpc;
 import com.google.bigtable.admin.v2.DropRowRangeRequest;
@@ -34,6 +35,7 @@
 import java.net.ServerSocket;
 import java.util.concurrent.ArrayBlockingQueue;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.ClusterStatus;
 import org.apache.hadoop.hbase.TableName;
 import org.junit.After;
 import org.junit.Before;
@@ -129,4 +131,11 @@ public void onMessage(ReqT message) {
       };
     }
   }
+
+  @Test
+  public void testGetClusterStatus() throws IOException {
+    // test to verify compatibility between 1x and 2x
+    ClusterStatus status = admin.getClusterStatus();
+    assertNotNull(status);
+  }
 }

bigtable-hbase-2.x-parent/bigtable-hbase-2.x/src/main/java/com/google/cloud/bigtable/hbase2_x/BigtableAdmin.java

@@ -22,6 +22,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.EnumSet;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -32,6 +33,7 @@
 import org.apache.hadoop.hbase.CacheEvictionStats;
 import org.apache.hadoop.hbase.ClusterMetrics;
 import org.apache.hadoop.hbase.ClusterMetrics.Option;
+import org.apache.hadoop.hbase.ClusterStatus;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.HTableDescriptor;
 import org.apache.hadoop.hbase.NamespaceDescriptor;
@@ -833,4 +835,19 @@ public Future<Void> updateReplicationPeerConfigAsync(
       String s, ReplicationPeerConfig replicationPeerConfig) {
     throw new UnsupportedOperationException("updateReplicationPeerConfigAsync"); // TODO
   }
+
+  @Override
+  public ClusterStatus getClusterStatus() throws IOException {
+    return new ClusterStatus(
+        "hbaseVersion",
+        "clusterid",
+        new HashMap(),
+        new ArrayList(),
+        null,
+        new ArrayList(),
+        new ArrayList(),
+        new String[0],
+        false,
+        -1);
+  }
 }

bigtable-hbase-2.x-parent/bigtable-hbase-2.x/src/test/java/com/google/cloud/bigtable/hbase2_x/BigtableAdminTest.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed 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 com.google.cloud.bigtable.hbase2_x;
+
+import static junit.framework.TestCase.assertEquals;
+import static junit.framework.TestCase.assertFalse;
+import static junit.framework.TestCase.assertNotNull;
+import static junit.framework.TestCase.assertNull;
+import static junit.framework.TestCase.assertTrue;
+import static org.mockito.Mockito.mock;
+
+import com.google.cloud.bigtable.hbase.wrappers.BigtableApi;
+import java.io.IOException;
+import org.apache.hadoop.hbase.ClusterStatus;
+import org.apache.hadoop.hbase.client.AbstractBigtableConnection;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+public class BigtableAdminTest {
+
+  @Test
+  public void testGetClusterStatus() throws IOException {
+    // test to verify compatibility between 1x and 2x
+    AbstractBigtableConnection connectionMock = mock(AbstractBigtableConnection.class);
+    BigtableApi bigtableApi = mock(BigtableApi.class);
+    Mockito.doReturn(bigtableApi).when(connectionMock).getBigtableApi();
+    BigtableAdmin bigtableAdmin = new BigtableAdmin(connectionMock);
+
+    ClusterStatus status = bigtableAdmin.getClusterStatus();
+    assertNotNull(status);
+    assertEquals("hbaseVersion", status.getHBaseVersion());
+    assertEquals("clusterid", status.getClusterId());
+    assertTrue(status.getServersName().isEmpty());
+    assertTrue(status.getDeadServerNames().isEmpty());
+    assertNull(status.getMaster());
+    assertTrue(status.getBackupMasterNames().isEmpty());
+    assertTrue(status.getRegionStatesInTransition().isEmpty());
+    assertEquals(0, status.getMasterCoprocessors().length);
+    assertFalse(status.getBalancerOn());
+    assertEquals(-1, status.getMasterInfoPort());
+  }
+}