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From nickwallen <...@git.apache.org>
Subject [GitHub] incubator-metron pull request #210: METRON-366: Add MODEL_APPLY to Stellar
Date Fri, 19 Aug 2016 19:10:16 GMT
Github user nickwallen commented on a diff in the pull request:

    https://github.com/apache/incubator-metron/pull/210#discussion_r75536649
  
    --- Diff: metron-analytics/metron-maas-common/src/main/java/org/apache/metron/maas/discovery/ServiceDiscoverer.java
---
    @@ -143,14 +167,59 @@ public void unregisterByContainer(String containerId) {
         }
       }
     
    +  public void blacklist(ModelEndpoint endpoint) {
    +    blacklist(toUrl(endpoint.getEndpoint().getUrl()));
    +  }
    +
    +  public void blacklist(URL url) {
    +    rwLock.writeLock().lock();
    +    blacklist.put(url, true);
    +    rwLock.writeLock().unlock();
    +  }
    +
    +  public ModelEndpoint getEndpoint(String modelName) {
    +    String version = null;
    +    rwLock.readLock().lock();
    +    version = modelToCurrentVersion.get(modelName);
    +    rwLock.readLock().unlock();
    +    if(version == null) {
    +      throw new IllegalStateException("Unable to find version for " + modelName);
    +    }
    +    return getEndpoint(modelName, version);
    +  }
    +
    +  private static URL toUrl(String url) {
    +    try {
    +      return new URL(url);
    +    } catch (MalformedURLException e) {
    +      throw new IllegalStateException("Endpoint does not refer to an actual URL");
    +    }
    +  }
    +
    +  public ModelEndpoint getEndpoint(String modelName, String modelVersion) {
    +    return getEndpoint(new Model(modelName, modelVersion));
    +  }
       public ModelEndpoint getEndpoint(Model model) {
         rwLock.readLock().lock();
         try {
           List<ModelEndpoint> endpoints = state.get(model);
           ModelEndpoint ret = null;
           if(endpoints != null) {
    -        int i = ThreadLocalRandom.current().nextInt(endpoints.size());
    -        ret = endpoints.get(i);
    +        for(int j = 0;j < 10;++j) {
    +          int i = ThreadLocalRandom.current().nextInt(endpoints.size());
    +          ret = endpoints.get(i);
    +          try {
    +            if (blacklist.asMap().containsKey(toUrl(ret.getEndpoint().getUrl()))) {
    +              continue;
    +            }
    +            else {
    +              return ret;
    +            }
    +          }
    +          catch(IllegalStateException ise) {
    +
    +          }
    --- End diff --
    
    Do we intend to just eat the exception?  


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