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https://issues.apache.org/jira/browse/METRON-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16397162#comment-16397162
 ] 

ASF GitHub Bot commented on METRON-1483:
----------------------------------------

Github user cestella commented on a diff in the pull request:

    https://github.com/apache/metron/pull/958#discussion_r174186490
  
    --- Diff: 
metron-contrib/metron-performance/src/main/java/org/apache/metron/performance/load/MessageGenerator.java
 ---
    @@ -0,0 +1,48 @@
    +/**
    + * 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.metron.performance.load;
    +
    +import org.apache.metron.performance.sampler.Sampler;
    +
    +import java.util.List;
    +import java.util.Random;
    +import java.util.concurrent.atomic.AtomicLong;
    +import java.util.function.Supplier;
    +
    +public class MessageGenerator implements Supplier<String> {
    +  private static ThreadLocal<Random> rng = ThreadLocal.withInitial(() -> 
new Random());
    +  private static AtomicLong guidOffset = new AtomicLong(0);
    +  private static String guidPrefix = "6141faf6-a8ba-4044-ab80-";
    --- End diff --
    
    done


> Create a tool to monitor performance of the topologies
> ------------------------------------------------------
>
>                 Key: METRON-1483
>                 URL: https://issues.apache.org/jira/browse/METRON-1483
>             Project: Metron
>          Issue Type: New Feature
>            Reporter: Casey Stella
>            Priority: Major
>
> In performance evaluation, generating synthetic load and monitoring the write 
> throughput of our kafka-to-kafka topologies has required a lot of custom 
> scripting.  We should have a tool that could do the following:
>  * Take a file representing a message template and generate synthetic load at 
> a given events per second
>  * Monitor the kafka offsets of a topic and report throughput numbers in 
> events per second
>  



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