[GitHub] [inlong] luchunliang commented on a diff in pull request #4855: [INLONG-4854][Agent] Report metrics at inongGroupId and inlongStreamId

[GitBox <gi...@apache.org>]

luchunliang commented on code in PR #4855:
URL: https://github.com/apache/inlong/pull/4855#discussion_r914566906


##########
inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/metrics/GlobalMetrics.java:
##########
@@ -0,0 +1,175 @@
+/*
+ * 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.inlong.agent.plugin.metrics;
+
+import org.apache.inlong.agent.utils.ConfigUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map.Entry;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class GlobalMetrics {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(GlobalMetrics.class);
+
+    // key: groupId_streamId
+    private static final ConcurrentHashMap<String, PluginMetric> pluginMetrics = new ConcurrentHashMap<>();
+    // key: sourceType_groupId_streamId
+    private static final ConcurrentHashMap<String, SourceMetric> sourceMetrics = new ConcurrentHashMap<>();
+    // key: sinkType_groupId_streamId
+    private static final ConcurrentHashMap<String, SinkMetric> sinkMetrics = new ConcurrentHashMap<>();
+
+    private static PluginMetric getPluginMetric(String tagName) {
+        PluginMetric metric;
+        if (pluginMetrics.containsKey(tagName)) {
+            metric = pluginMetrics.get(tagName);
+        } else {
+            if (ConfigUtil.isPrometheusEnabled()) {
+                metric = new PluginPrometheusMetric(tagName);
+            } else {
+                metric = new PluginJmxMetric(tagName);
+            }
+            pluginMetrics.put(tagName, metric);
+        }
+        return metric;

Review Comment:
   synchronized problem, thread1 and thread2 can create two metrics and return it.
   Please use computeIfAbsent method.



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