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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5852) Move JSON generation code into static methods
Date Wed, 01 Mar 2017 15:29:45 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890380#comment-15890380
] 

ASF GitHub Bot commented on FLINK-5852:
---------------------------------------

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

    https://github.com/apache/flink/pull/3365#discussion_r103710293
  
    --- Diff: flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/utils/MutableIOMetrics.java
---
    @@ -0,0 +1,90 @@
    +/*
    + * 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.flink.runtime.webmonitor.utils;
    +
    +import com.fasterxml.jackson.core.JsonGenerator;
    +import org.apache.flink.runtime.execution.ExecutionState;
    +import org.apache.flink.runtime.executiongraph.IOMetrics;
    +import org.apache.flink.runtime.metrics.MetricNames;
    +import org.apache.flink.runtime.webmonitor.metrics.MetricFetcher;
    +import org.apache.flink.runtime.webmonitor.metrics.MetricStore;
    +
    +import javax.annotation.Nullable;
    +import java.io.IOException;
    +
    +public class MutableIOMetrics extends IOMetrics {
    --- End diff --
    
    Could you write a high level comment why we have this as a utility for the web frontend?


> Move JSON generation code into static methods
> ---------------------------------------------
>
>                 Key: FLINK-5852
>                 URL: https://issues.apache.org/jira/browse/FLINK-5852
>             Project: Flink
>          Issue Type: Improvement
>          Components: Webfrontend
>            Reporter: Chesnay Schepler
>            Assignee: Chesnay Schepler
>             Fix For: 1.3.0
>
>
> In order to implement the HistoryServer we need a way to generate the JSON responses
independent of the REST API. As such i suggest to move the main parts of the generation code
for job-specific handlers into static methods. 



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