[ 
https://issues.apache.org/jira/browse/STORM-1269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15183696#comment-15183696
 ] 

ASF GitHub Bot commented on STORM-1269:
---------------------------------------

Github user revans2 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1185#discussion_r55271251
  
    --- Diff: storm-core/src/jvm/org/apache/storm/daemon/StormCommon.java ---
    @@ -0,0 +1,604 @@
    +/**
    + * 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.storm.daemon;
    +
    +import com.codahale.metrics.MetricRegistry;
    +import org.apache.storm.Config;
    +import org.apache.storm.Constants;
    +import org.apache.storm.Thrift;
    +import org.apache.storm.cluster.IStormClusterState;
    +import org.apache.storm.daemon.metrics.MetricsUtils;
    +import org.apache.storm.daemon.metrics.reporters.PreparableReporter;
    +import org.apache.storm.generated.*;
    +import org.apache.storm.generated.StormBase;
    +import org.apache.storm.metric.EventLoggerBolt;
    +import org.apache.storm.metric.MetricsConsumerBolt;
    +import org.apache.storm.metric.SystemBolt;
    +import org.apache.storm.security.auth.IAuthorizer;
    +import org.apache.storm.task.IBolt;
    +import org.apache.storm.testing.NonRichBoltTracker;
    +import org.apache.storm.utils.ConfigUtils;
    +import org.apache.storm.utils.IPredicate;
    +import org.apache.storm.utils.ThriftTopologyUtils;
    +import org.apache.storm.utils.Utils;
    +import org.json.simple.JSONValue;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import java.util.*;
    +
    +public class StormCommon {
    +    // A singleton instance allows us to mock delegated static methods in 
our
    +    // tests by subclassing.
    +    private static StormCommon _instance = new StormCommon();
    +
    +    /**
    +     * Provide an instance of this class for delegates to use.  To mock out
    +     * delegated methods, provide an instance of a subclass that overrides 
the
    +     * implementation of the delegated method.
    +     * @param common a StormCommon instance
    +     * @return the previously set instance
    +     */
    +    public static StormCommon setInstance(StormCommon common) {
    +        StormCommon oldInstance = _instance;
    +        _instance = common;
    +        return oldInstance;
    +    }
    +
    +    private static final Logger LOG = 
LoggerFactory.getLogger(StormCommon.class);
    +
    +    public static final String ACKER_COMPONENT_ID = 
Acker.ACKER_COMPONENT_ID;
    +    public static final String ACKER_INIT_STREAM_ID = 
Acker.ACKER_INIT_STREAM_ID;
    +    public static final String ACKER_ACK_STREAM_ID = 
Acker.ACKER_ACK_STREAM_ID;
    +    public static final String ACKER_FAIL_STREAM_ID = 
Acker.ACKER_FAIL_STREAM_ID;
    +
    +    public static final String SYSTEM_STREAM_ID = "__system";
    +
    +    public static final String EVENTLOGGER_COMPONENT_ID = "__eventlogger";
    +    public static final String EVENTLOGGER_STREAM_ID = "__eventlog";
    +
    +    public static void startMetricsReporter(PreparableReporter report, Map 
conf) {
    +        report.prepare(new MetricRegistry(), conf);
    +        report.start();
    +        LOG.info("Started statistics report plugin...");
    +    }
    +
    +    public static void startMetricsReporters(Map conf) {
    +        List<PreparableReporter> reporters = 
MetricsUtils.getPreparableReporters(conf);
    +        for (PreparableReporter reporter : reporters) {
    +            startMetricsReporter(reporter, conf);
    +        }
    +    }
    +
    +    public static String getTopologyNameById(String topologyId) {
    +        String topologyName = null;
    +        try {
    +            topologyName = topologyIdToName(topologyId);
    +        } catch (InvalidTopologyException e) {
    +            LOG.error("Invalid topologyId=" + topologyId);
    +        }
    +        return topologyName;
    +    }
    +
    +    /**
    +     * Convert topologyId to topologyName. TopologyId = 
topoloygName-counter-timeStamp
    +     *
    +     * @param topologyId
    +     * @return
    +     */
    +    public static String topologyIdToName(String topologyId) throws 
InvalidTopologyException {
    +        String ret = null;
    +        int index = topologyId.lastIndexOf('-');
    +        if (index != -1 && index > 2) {
    +            index = topologyId.lastIndexOf('-', index - 1);
    +            if (index != -1 && index > 0)
    +                ret = topologyId.substring(0, index);
    +            else
    +                throw new InvalidTopologyException(topologyId + " is not a 
valid topologyId");
    +        } else
    +            throw new InvalidTopologyException(topologyId + " is not a 
valid topologyId");
    +        return ret;
    +    }
    +
    +    public static String getStormId(IStormClusterState stormClusterState, 
final String topologyName) {
    +        List<String> activeTopologys = stormClusterState.activeStorms();
    +        IPredicate pred = new IPredicate<String>() {
    +            @Override
    +            public boolean test(String obj) {
    +                return obj != null ? 
getTopologyNameById(obj).equals(topologyName) : false;
    +            }
    +        };
    +        return Utils.findOne(pred, activeTopologys);
    +    }
    +
    +    public static Map<String, StormBase> topologyBases(IStormClusterState 
stormClusterState) {
    +        return _instance.topologyBasesImpl(stormClusterState);
    +    }
    +
    +    protected Map<String, StormBase> topologyBasesImpl(IStormClusterState 
stormClusterState) {
    +        List<String> activeTopologys = stormClusterState.activeStorms();
    +        Map<String, StormBase> stormBases = new HashMap<String, 
StormBase>();
    +        if (activeTopologys != null) {
    +            for (String topologyId : activeTopologys) {
    +                StormBase base = stormClusterState.stormBase(topologyId, 
null);
    +                if (base != null) {
    --- End diff --
    
    The original code didn't check for null here.  Is this needed?  Extra 
checks that fix things up like this make me nervous that be broke something 
somewhere and we are using this to work around it.


> port backtype.storm.daemon.common to java
> -----------------------------------------
>
>                 Key: STORM-1269
>                 URL: https://issues.apache.org/jira/browse/STORM-1269
>             Project: Apache Storm
>          Issue Type: New Feature
>          Components: storm-core
>            Reporter: Robert Joseph Evans
>            Assignee: Basti Liu
>              Labels: java-migration, jstorm-merger
>
> Common utils shared by the daemons (Some things should just use the Thrift 
> object)
> https://github.com/apache/storm/blob/jstorm-import/jstorm-core/src/main/java/com/alibaba/jstorm/cluster/Common.java
>  is similar but not exactly the same.



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