HBASE-5933 Add RegionLoad.java (Gregory)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1353743 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/RegionLoad.java

@@ -0,0 +1,156 @@
+/**
+ * Copyright The Apache Software Foundation
+ *
+ * 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;
+
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.util.Bytes;
+import java.util.TreeSet;
+import java.util.Set;
+
+/**
+  * Encapsulates per-region load metrics.
+  */
+@InterfaceAudience.Private
+public class RegionLoad {
+
+  protected HBaseProtos.RegionLoad regionLoadPB;
+
+  public RegionLoad(HBaseProtos.RegionLoad regionLoadPB) {
+    this.regionLoadPB = regionLoadPB;
+  }
+
+  // Getters
+  private String[] getCoprocessors() {
+    int numCoprocessors = regionLoadPB.getCoprocessorsCount();
+    String [] ret = new String[numCoprocessors];
+    for (int i = 0; i < numCoprocessors; ++i) {
+      ret[i] = regionLoadPB.getCoprocessors(i).getName();
+    }
+    return ret;
+  }
+
+  /**
+   * @return the region name
+   */
+  public byte[] getName() {
+    return regionLoadPB.getRegionSpecifier().getValue().toByteArray();
+  }
+
+  /**
+   * @return the region name as a string
+   */
+  public String getNameAsString() {
+    return Bytes.toString(getName());
+  }
+
+  /**
+   * @return the number of stores
+   */
+  public int getStores() {
+    return regionLoadPB.getStores();
+  }
+
+  /**
+   * @return the number of storefiles
+   */
+  public int getStorefiles() {
+    return regionLoadPB.getStorefiles();
+  }
+
+  /**
+   * @return the total size of the storefiles, in MB
+   */
+  public int getStorefileSizeMB() {
+    return regionLoadPB.getStorefileSizeMB();
+  }
+
+  /**
+   * @return the memstore size, in MB
+   */
+  public int getMemStoreSizeMB() {
+    return regionLoadPB.getMemstoreSizeMB();
+  }
+
+  /**
+   * @return the approximate size of storefile indexes on the heap, in MB
+   */
+  public int getStorefileIndexSizeMB() {
+    return regionLoadPB.getStorefileIndexSizeMB();
+  }
+
+  /**
+   * @return the number of requests made to region
+   */
+  public long getRequestsCount() {
+    return getReadRequestsCount() + getWriteRequestsCount();
+  }
+
+  /**
+   * @return the number of read requests made to region
+   */
+  public long getReadRequestsCount() {
+    return regionLoadPB.getReadRequestsCount();
+  }
+
+  /**
+   * @return the number of write requests made to region
+   */
+  public long getWriteRequestsCount() {
+    return regionLoadPB.getWriteRequestsCount();
+  }
+
+  /**
+   * @return The current total size of root-level indexes for the region, in KB.
+   */
+  public int getRootIndexSizeKB() {
+    return regionLoadPB.getRootIndexSizeKB();
+  }
+
+  /**
+   * @return The total size of all index blocks, not just the root level, in KB.
+   */
+  public int getTotalStaticIndexSizeKB() {
+    return regionLoadPB.getTotalStaticIndexSizeKB();
+  }
+
+  /**
+   * @return The total size of all Bloom filter blocks, not just loaded into the
+   * block cache, in KB.
+   */
+  public int getTotalStaticBloomSizeKB() {
+    return regionLoadPB.getTotalStaticBloomSizeKB();
+  }
+
+  /**
+   * @return the total number of kvs in current compaction
+   */
+  public long getTotalCompactingKVs() {
+    return regionLoadPB.getTotalCompactingKVs();
+  }
+
+  /**
+   * @return the number of already compacted kvs in current compaction
+   */
+  public long getCurrentCompactedKVs() {
+    return regionLoadPB.getCurrentCompactedKVs();
+  }
+}