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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8323) Add CollectionWatcher API to ZkStateReader
Date Thu, 28 Apr 2016 21:17:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263020#comment-15263020
] 

ASF GitHub Bot commented on SOLR-8323:
--------------------------------------

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

    https://github.com/apache/lucene-solr/pull/32#discussion_r61504017
  
    --- Diff: solr/solrj/src/java/org/apache/solr/common/cloud/CollectionStatePredicate.java
---
    @@ -0,0 +1,41 @@
    +package org.apache.solr.common.cloud;
    +
    +/*
    + * 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.
    + */
    +
    +import java.util.Set;
    +import java.util.concurrent.TimeUnit;
    +
    +/**
    + * Interface to determine if a collection state matches a required state
    + *
    + * @see ZkStateReader#waitForState(String, long, TimeUnit, CollectionStatePredicate)
    + */
    +public interface CollectionStatePredicate {
    +
    +  /**
    +   * Check the collection state matches a required state
    +   *
    +   * The collectionState parameter may be null if the collection does not exist
    +   * or has been deleted
    --- End diff --
    
    This wants to be `@param collectionState the current collection state, or null if the
collection doesn't exist or has been deleted`


> Add CollectionWatcher API to ZkStateReader
> ------------------------------------------
>
>                 Key: SOLR-8323
>                 URL: https://issues.apache.org/jira/browse/SOLR-8323
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: master
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>         Attachments: SOLR-8323.patch, SOLR-8323.patch, SOLR-8323.patch, SOLR-8323.patch
>
>
> An API to watch for changes to collection state would be a generally useful thing, both
internally and for client use.



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