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https://issues.apache.org/jira/browse/SOLR-8097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15237798#comment-15237798
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Shawn Heisey commented on SOLR-8097:
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I personally would never change those things after the first use of a client --
not even the default collection on a cloud client. If the client is being used
by multiple threads, determining what will happen if you change the client
after you start using it is difficult.
IMHO this makes all setters superfluous, even setDefaultCollection. Anything a
setter does should be handled by the builder, and you can supply a collection
parameter to methods that make requests, so you're never locked in to the
default.
+1 to open a new issue to deprecate the setters in branch_6x and remove in
master, after making sure all options are handled by the builder. If the
javadoc on the setters doesn't already say so, it should indicate that they are
not thread-safe and should only be used immediately after object creation.
> Implement a builder pattern for constructing a Solrj client
> -----------------------------------------------------------
>
> Key: SOLR-8097
> URL: https://issues.apache.org/jira/browse/SOLR-8097
> Project: Solr
> Issue Type: Improvement
> Components: SolrJ
> Affects Versions: master
> Reporter: Hrishikesh Gadre
> Assignee: Anshum Gupta
> Fix For: master, 6.1
>
> Attachments: SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch,
> SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch,
> SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch,
> SOLR-8097.patch, SOLR-8097.patch, SOLR-8097.patch
>
>
> Currently Solrj clients (e.g. CloudSolrClient) supports multiple constructors
> as follows,
> public CloudSolrClient(String zkHost)
> public CloudSolrClient(String zkHost, HttpClient httpClient)
> public CloudSolrClient(Collection<String> zkHosts, String chroot)
> public CloudSolrClient(Collection<String> zkHosts, String chroot, HttpClient
> httpClient)
> public CloudSolrClient(String zkHost, boolean updatesToLeaders)
> public CloudSolrClient(String zkHost, boolean updatesToLeaders, HttpClient
> httpClient)
> It is kind of problematic while introducing an additional parameters (since
> we need to introduce additional constructors). Instead it will be helpful to
> provide SolrClient Builder which can provide either default values or support
> overriding specific parameter.
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