wchevreuil commented on a change in pull request #2052:
URL: https://github.com/apache/hbase/pull/2052#discussion_r453551435
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/namequeues/LogEventHandler.java
##########
@@ -50,64 +50,83 @@
import
org.apache.hadoop.hbase.shaded.protobuf.generated.TooSlowLog.SlowLogPayload;
/**
- * Event Handler run by disruptor ringbuffer consumer
+ * Event Handler run by disruptor ringbuffer consumer.
+ * Although this is generic implementation for namedQueue, it can have
individual queue specific
+ * logic.
*/
@InterfaceAudience.Private
class LogEventHandler implements EventHandler<RingBufferEnvelope> {
private static final Logger LOG =
LoggerFactory.getLogger(LogEventHandler.class);
- private static final String SYS_TABLE_QUEUE_SIZE =
- "hbase.regionserver.slowlog.systable.queue.size";
- private static final int DEFAULT_SYS_TABLE_QUEUE_SIZE = 1000;
- private static final int SYSTABLE_PUT_BATCH_SIZE = 100;
+ private static final String SLOW_LOG_RING_BUFFER_SIZE =
+ "hbase.regionserver.slowlog.ringbuffer.size";
+
+ // Map that binds namedQueues.
+ // If NamedQueue of specific type is enabled, corresponding Queue will be
used to
+ // insert and retrieve records.
+ // Individual queue sizes should be determined based on their individual
configs.
+ private final Map<NamedQueuePayload.NamedQueueEvent, Queue> namedQueues =
new HashMap<>();
Review comment:
For example, the caller should be able to determine which queue
implementations (and its related services) should be loaded. That would isolate
LogEventHandler from being constantly modified by additional services requiring
this type of loggings.
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/namequeues/LogEventHandler.java
##########
@@ -50,64 +50,83 @@
import
org.apache.hadoop.hbase.shaded.protobuf.generated.TooSlowLog.SlowLogPayload;
/**
- * Event Handler run by disruptor ringbuffer consumer
+ * Event Handler run by disruptor ringbuffer consumer.
+ * Although this is generic implementation for namedQueue, it can have
individual queue specific
Review comment:
Why not follow strategy pattern, where individual queues specific logics
would be left for the implementing strategy?
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/namequeues/SlowLogPersistentService.java
##########
@@ -0,0 +1,98 @@
+/*
+ *
+ * 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.namequeues;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.TooSlowLog;
+import org.apache.hadoop.hbase.slowlog.SlowLogTableAccessor;
+import org.apache.hbase.thirdparty.com.google.common.collect.EvictingQueue;
+import org.apache.hbase.thirdparty.com.google.common.collect.Queues;
+import org.apache.yetus.audience.InterfaceAudience;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Queue;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * Persistent service provider for Slow/LargeLog events
+ */
+@InterfaceAudience.Private
+public class SlowLogPersistentService {
Review comment:
Implement a common interface for all other possible log services as well?
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