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https://issues.apache.org/jira/browse/PHOENIX-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990895#comment-15990895
]
ASF GitHub Bot commented on PHOENIX-3655:
-----------------------------------------
Github user joshelser commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/242#discussion_r114133655
--- Diff:
phoenix-queryserver/src/main/java/org/apache/phoenix/queryserver/metrics/sink/PqsFileSink.java
---
@@ -0,0 +1,66 @@
+/*
+ * 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.phoenix.queryserver.metrics.sink;
+
+
+import org.apache.phoenix.queryserver.metrics.PqsConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.UnsupportedEncodingException;
+import java.io.FileOutputStream;
+import java.io.PrintStream;
+
+
+public class PqsFileSink extends PqsSink {
+
+ private PrintStream writer;
+ private static final Logger LOG =
LoggerFactory.getLogger(PqsFileSink.class);
+ private String filename = PqsConfiguration.getFileSinkFilename();
+
+ public PqsFileSink() {
+ try {
+ writer = filename == null ? System.out
+ : new PrintStream(new FileOutputStream(new
File(filename)),
+ true, "UTF-8");
+ } catch (FileNotFoundException e) {
+ LOG.error("Error creating "+ filename, e);
+ } catch (UnsupportedEncodingException e) {
+ LOG.error("Error creating "+ filename, e);
+ }
+ }
+
+ @Override
+ public void close() {
+ writer.close();
+ }
+
+
+ @Override
+ public void writeJson(String json){
+ if (json != null)
+ {
+ writer.print(json);
+ }
+ writer.println();
--- End diff --
Why print an empty line on every invocation?
> Metrics for PQS
> ---------------
>
> Key: PHOENIX-3655
> URL: https://issues.apache.org/jira/browse/PHOENIX-3655
> Project: Phoenix
> Issue Type: New Feature
> Affects Versions: 4.8.0
> Environment: Linux 3.13.0-107-generic kernel, v4.9.0-HBase-0.98
> Reporter: Rahul Shrivastava
> Assignee: Rahul Shrivastava
> Fix For: 4.9.0
>
> Attachments: MetricsforPhoenixQueryServerPQS.pdf
>
> Original Estimate: 240h
> Remaining Estimate: 240h
>
> Phoenix Query Server runs a separate process compared to its thin client.
> Metrics collection is currently done by PhoenixRuntime.java i.e. at Phoenix
> driver level. We need the following
> 1. For every jdbc statement/prepared statement/ run by PQS , we need
> capability to collect metrics at PQS level and push the data to external sink
> i.e. file, JMX , other external custom sources.
> 2. Besides this global metrics could be periodically collected and pushed to
> the sink.
> 2. PQS can be configured to turn on metrics collection and type of collect (
> runtime or global) via hbase-site.xml
> 3. Sink could be configured via an interface in hbase-site.xml.
> All metrics definition https://phoenix.apache.org/metrics.html
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