HBASE-17313 Add BufferedMutatorParams#clone method (Joep Rottinghuis)

hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorParams.java

@@ -126,4 +126,18 @@ public class BufferedMutatorParams {
     this.listener = listener;
     return this;
   }
-}
+
+  /*
+   * (non-Javadoc)
+   *
+   * @see java.lang.Object#clone()
+   */
+  public BufferedMutatorParams clone() {
+    BufferedMutatorParams clone = new BufferedMutatorParams(this.tableName);
+    clone.writeBufferSize = this.writeBufferSize;
+    clone.maxKeyValueSize = maxKeyValueSize;
+    clone.pool = this.pool;
+    clone.listener = this.listener;
+    return clone;
+  }
+}

hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestBufferedMutatorParams.java

@@ -0,0 +1,154 @@
+/*
+ *
+ * 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.hadoop.hbase.client;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.testclassification.ClientTests;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category({ ClientTests.class, SmallTests.class })
+public class TestBufferedMutatorParams {
+
+  /**
+   * Just to create in instance, this doesn't actually function.
+   */
+  private class MockExecutorService implements ExecutorService {
+
+    public void execute(Runnable command) {
+    }
+
+    public void shutdown() {
+    }
+
+    public List<Runnable> shutdownNow() {
+      return null;
+    }
+
+    public boolean isShutdown() {
+      return false;
+    }
+
+    public boolean isTerminated() {
+      return false;
+    }
+
+    public boolean awaitTermination(long timeout, TimeUnit unit)
+        throws InterruptedException {
+      return false;
+    }
+
+    public <T> Future<T> submit(Callable<T> task) {
+      return null;
+    }
+
+    public <T> Future<T> submit(Runnable task, T result) {
+      return null;
+    }
+
+    public Future<?> submit(Runnable task) {
+      return null;
+    }
+
+    public <T> List<Future<T>> invokeAll(
+        Collection<? extends Callable<T>> tasks) throws InterruptedException {
+      return null;
+    }
+
+    public <T> List<Future<T>> invokeAll(
+        Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
+        throws InterruptedException {
+      return null;
+    }
+
+    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
+        throws InterruptedException, ExecutionException {
+      return null;
+    }
+
+    public <T> T invokeAny(Collection<? extends Callable<T>> tasks,
+        long timeout, TimeUnit unit)
+        throws InterruptedException, ExecutionException, TimeoutException {
+      return null;
+    }
+  }
+
+  /**
+   * Just to create an instance, this doesn't actually function.
+   */
+  private class MockExceptionListener
+      implements BufferedMutator.ExceptionListener {
+    public void onException(RetriesExhaustedWithDetailsException exception,
+        BufferedMutator mutator) throws RetriesExhaustedWithDetailsException {
+    }
+  }
+
+  @Test
+  public void testClone() {
+    ExecutorService pool = new MockExecutorService();
+    BufferedMutatorParams bmp =
+        new BufferedMutatorParams(TableName.valueOf("SomeTableName"));
+
+    BufferedMutator.ExceptionListener listener = new MockExceptionListener();
+    bmp.writeBufferSize(17).maxKeyValueSize(13).pool(pool).listener(listener);
+    BufferedMutatorParams clone = bmp.clone();
+
+    // Confirm some literals
+    assertEquals("SomeTableName", clone.getTableName().toString());
+    assertEquals(17, clone.getWriteBufferSize());
+    assertEquals(13, clone.getMaxKeyValueSize());
+
+    cloneTest(bmp, clone);
+
+    BufferedMutatorParams cloneWars = clone.clone();
+    cloneTest(clone, cloneWars);
+    cloneTest(bmp, cloneWars);
+  }
+
+  /**
+   * Confirm all fields are equal.
+   * @param some some instance
+   * @param clone a clone of that instance, but not the same instance.
+   */
+  private void cloneTest(BufferedMutatorParams some,
+      BufferedMutatorParams clone) {
+    assertFalse(some == clone);
+    assertEquals(some.getTableName().toString(),
+        clone.getTableName().toString());
+    assertEquals(some.getWriteBufferSize(), clone.getWriteBufferSize());
+    assertEquals(some.getMaxKeyValueSize(), clone.getMaxKeyValueSize());
+    assertTrue(some.getListener() == clone.getListener());
+    assertTrue(some.getPool() == clone.getPool());
+  }
+
+}