[GitHub] [hbase] saintstack commented on a change in pull request #1274: HBASE-23968 Periodically check whether a system stop is requested in compaction by time.

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saintstack commented on a change in pull request #1274: HBASE-23968 Periodically check whether a system stop is requested in compaction by time.
URL: https://github.com/apache/hbase/pull/1274#discussion_r396669282
 
 

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 File path: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CloseChecker.java
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+/**
+ * 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.regionserver.compactions;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.regionserver.Store;
+import org.apache.yetus.audience.InterfaceAudience;
+
+/**
+ * Check periodically to see if a system stop is requested
+ */
+@InterfaceAudience.Private
+public class CloseChecker {
+  public static final String SIZE_LIMIT_KEY = "hbase.hstore.close.check.interval";
+  public static final String TIME_LIMIT_KEY = "hbase.hstore.close.check.time.interval";
+
+  private final int closeCheckSizeLimit;
+  private final long closeCheckTimeLimit;
+
+  private long bytesWrittenProgressForCloseCheck;
+  private long lastCloseCheckMillis;
+
+  public CloseChecker(Configuration conf, long currentTime) {
+    this.closeCheckSizeLimit = conf.getInt(SIZE_LIMIT_KEY, 10 * 1000 * 1000 /* 10 MB */);
+    this.closeCheckTimeLimit = conf.getLong(TIME_LIMIT_KEY, 10 * 1000L /* 10 s */);
+    this.bytesWrittenProgressForCloseCheck = 0;
+    this.lastCloseCheckMillis = currentTime;
+  }
+
+  public boolean isClosedBySizeLimit(Store store, long bytesWritten) {
+    if (closeCheckSizeLimit <= 0) {
+      return false;
+    }
+
+    bytesWrittenProgressForCloseCheck += bytesWritten;
+    if (bytesWrittenProgressForCloseCheck <= closeCheckSizeLimit) {
+      return false;
+    }
+
+    bytesWrittenProgressForCloseCheck = 0;
+    return !store.areWritesEnabled();
+  }
+
+  public boolean isClosedByTimeLimit(Store store, long now) {
+    if (closeCheckTimeLimit <= 0) {
+      return false;
+    }
+
+    final long elapsedMillis = now - lastCloseCheckMillis;
+    if (elapsedMillis <= closeCheckTimeLimit) {
+      return false;
+    }
+
+    lastCloseCheckMillis = now;
 
 Review comment:
   Single thread in here? Otherwise, perhaps this should be volatile?

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