[GitHub] [solr] risdenk commented on a diff in pull request #975: Allow JAX-RS v2 API definition

[GitBox <gi...@apache.org>]

risdenk commented on code in PR #975:
URL: https://github.com/apache/solr/pull/975#discussion_r960818330


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solr/core/src/java/org/apache/solr/jersey/PostRequestDecorationFilter.java:
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@@ -0,0 +1,56 @@
+/*
+ * 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.solr.jersey;
+
+import org.apache.solr.core.SolrCore;
+import org.apache.solr.request.SolrQueryRequest;
+import org.apache.solr.request.SolrRequestHandler;
+import org.apache.solr.response.SolrQueryResponse;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerResponseContext;
+import javax.ws.rs.container.ContainerResponseFilter;
+import java.io.IOException;
+import java.lang.invoke.MethodHandles;
+
+import static org.apache.solr.jersey.RequestContextConstants.SOLR_QUERY_REQUEST_KEY;
+
+/**
+ * Applies standard post-processing decorations to a {@link SolrJerseyResponse} that are needed on all responses.
+ *
+ * @see SolrCore#postDecorateResponse(SolrRequestHandler, SolrQueryRequest, SolrQueryResponse)
+ */
+public class PostRequestDecorationFilter implements ContainerResponseFilter {
+
+    private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    @Override
+    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
+        final SolrQueryRequest solrQueryRequest = (SolrQueryRequest) requestContext.getProperty(SOLR_QUERY_REQUEST_KEY);
+        if ( ! responseContext.hasEntity() || ! SolrJerseyResponse.class.isInstance(responseContext.getEntity())) {
+            log.debug("Skipping QTime assignment because response was not a SolrJerseyResponse");

Review Comment:
   `qtime` is definitely useful for some quick performance checks if you are running some queries. I also know I've seen it be helpful if there are query timeouts just to see how long the result took. Easier than trying to coordinate in the logs. Not sure outside of that.



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