epugh commented on code in PR #4799:
URL: https://github.com/apache/solr/pull/4799#discussion_r3843875105


##########
solr/solrj-streaming/src/java/org/apache/solr/client/solrj/io/stream/SolrStream.java:
##########
@@ -63,23 +65,57 @@ public class SolrStream extends TupleStream {
   private boolean distrib = true;
   private String user;
   private String password;
-  private String core;
 
   private transient SolrClientCache clientCache;
   private transient boolean doCloseCache;
 
+  // TODO SOLR-17995 proposes that we should deprecate this constructor in 
favor of one of the other
+  // constructors that requires users to provide the core as an explicit 
parameter
   /**
-   * @param baseUrl Base URL of the stream.
-   * @param params Map<String, String> of parameters
+   * @param collectionOrCoreUrl URL of the Solr core or collection to query, 
typically of the form
+   *     "http://host:8983/solr/myCore";.
+   * @param params query-parameters sent with the streaming request
    */
-  public SolrStream(String baseUrl, SolrParams params) {
-    this.baseUrl = baseUrl;
+  public SolrStream(String collectionOrCoreUrl, SolrParams params) {
+    this.baseUrl = collectionOrCoreUrl;
     this.params = params;
   }
 
-  SolrStream(String baseUrl, SolrParams params, String core) {
-    this(baseUrl, params);
+  // TODO SOLR-17995 proposes that we should deprecate this constructor in 
favor of one of the other
+  // constructors that requires users to provide the core as an explicit 
parameter
+  /**
+   * @param collectionOrCoreUrl URL of the Solr core or collection to query, 
typically of the form
+   *     "http://host:8983/solr/myCore";.
+   * @param path the request handler path to query (e.g. "/export"). If not 
provided, defaults to
+   *     "/select".
+   * @param params query-parameters sent with the streaming request
+   */
+  public SolrStream(String collectionOrCoreUrl, String path, SolrParams 
params) {
+    this(collectionOrCoreUrl, null, path, params);
+  }
+
+  /**
+   * @param baseUrl the Solr node's "base" URL (i.e. no core or collection in 
the path
+   * @param params query-parameters sent with the streaming request
+   * @param core the name of the collection or core to query; must be hosted 
at {@code baseUrl}
+   */
+  public SolrStream(String baseUrl, SolrParams params, String core) {
+    this(baseUrl, core, null, params);
+  }
+
+  /**
+   * @param baseUrl the Solr node's "base" URL (i.e. no core or collection in 
the path
+   * @param core the name of the collection or core to query; must be hosted 
at {@code baseUrl}
+   * @param path the request handler path to query (e.g. "/export"). If not 
provided (i.e. {@code
+   *     null}), the handler is instead resolved from a "qt" param embedded in 
{@code params}, or

Review Comment:
   does this suggest we still support `qt`?



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