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https://issues.apache.org/jira/browse/CASSANDRA-13665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16420351#comment-16420351
]
ASF GitHub Bot commented on CASSANDRA-13665:
--------------------------------------------
Github user mhartopo commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/190#discussion_r178269292
--- Diff: src/java/org/apache/cassandra/tools/nodetool/ClientStats.java ---
@@ -0,0 +1,69 @@
+/*
+ * 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.cassandra.tools.nodetool;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.apache.cassandra.tools.NodeProbe;
+import org.apache.cassandra.tools.NodeTool.NodeToolCmd;
+import org.apache.cassandra.tools.nodetool.formatter.TableBuilder;
+
+import io.airlift.airline.Command;
+import io.airlift.airline.Option;
+
+@Command(name = "clientstats", description = "Print information about
connected clients")
+public class ClientStats extends NodeToolCmd
+{
+ @Option(title = "list_connections", name = "--all", description =
"Lists all connections")
+ private boolean listConnections = false;
+
+ @Override
+ public void execute(NodeProbe probe)
+ {
+ if (listConnections)
+ {
+ List<Map<String, String>> clients = (List<Map<String,
String>>) probe.getClientMetric("connections");
+ if (!clients.isEmpty())
+ {
+ TableBuilder table = new TableBuilder();
+ table.add("Address", "SSL", "Version", "User", "Keyspace",
"Requests");
+ for (Map<String, String> conn : clients)
+ {
+ table.add(conn.get("address"), conn.get("ssl"),
conn.get("version"),
+ conn.get("user"), conn.get("keyspace"),
conn.get("requests"));
+ }
+ table.printTo(System.out);
+ System.out.println();
+ }
+ }
+
+ Map<String, Integer> connectionsByUser = (Map<String, Integer>)
probe.getClientMetric("connectedNativeClientsByUser");
+ int total = connectionsByUser.values().stream().reduce(0,
Integer::sum);
+ System.out.println("Total connected clients: " + total);
+ System.out.println();
+ TableBuilder table = new TableBuilder();
+ table.add("User", "Connections");
+ for (Entry<String, Integer> entry : connectionsByUser.entrySet())
+ {
+ table.add(entry.getKey(), entry.getValue().toString());
+ }
+ table.printTo(System.out);
+ }
+}
--- End diff --
don't forget newline at the EOF
> nodetool clientlist
> -------------------
>
> Key: CASSANDRA-13665
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13665
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Reporter: Jon Haddad
> Assignee: Chris Lohfink
> Priority: Major
>
> There should exist a nodetool command that lists each client connection.
> Ideally it would display the following:
> * host
> * protocol version
> * user logged in as
> * current keyspace
> * total queries executed
> * ssl connections
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