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https://issues.apache.org/jira/browse/NIFI-4516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16417470#comment-16417470
]
ASF GitHub Bot commented on NIFI-4516:
--------------------------------------
Github user bbende commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2517#discussion_r177777418
--- Diff:
nifi-nar-bundles/nifi-solr-bundle/nifi-solr-processors/src/main/java/org/apache/nifi/processors/solr/FetchSolr.java
---
@@ -0,0 +1,401 @@
+/*
+ * 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.nifi.processors.solr;
+
+import com.google.gson.stream.JsonWriter;
+import org.apache.nifi.annotation.behavior.InputRequirement;
+import org.apache.nifi.annotation.behavior.WritesAttribute;
+import org.apache.nifi.annotation.behavior.WritesAttributes;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.expression.AttributeExpression;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
+import org.apache.nifi.logging.ComponentLog;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.io.OutputStreamCallback;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.schema.access.SchemaNotFoundException;
+import org.apache.nifi.serialization.RecordSetWriter;
+import org.apache.nifi.serialization.RecordSetWriterFactory;
+import org.apache.nifi.serialization.record.RecordSchema;
+import org.apache.nifi.serialization.record.RecordSet;
+import org.apache.solr.client.solrj.SolrQuery;
+import org.apache.solr.client.solrj.request.QueryRequest;
+import org.apache.solr.client.solrj.response.FacetField;
+import org.apache.solr.client.solrj.response.FieldStatsInfo;
+import org.apache.solr.client.solrj.response.IntervalFacet;
+import org.apache.solr.client.solrj.response.QueryResponse;
+import org.apache.solr.client.solrj.response.RangeFacet;
+import org.apache.solr.client.solrj.response.RangeFacet.Count;
+import org.apache.solr.common.params.FacetParams;
+import org.apache.solr.common.params.MultiMapSolrParams;
+import org.apache.solr.common.params.StatsParams;
+import org.apache.solr.servlet.SolrRequestParsers;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static org.apache.nifi.processors.solr.SolrUtils.SOLR_TYPE;
+import static org.apache.nifi.processors.solr.SolrUtils.COLLECTION;
+import static
org.apache.nifi.processors.solr.SolrUtils.JAAS_CLIENT_APP_NAME;
+import static
org.apache.nifi.processors.solr.SolrUtils.SSL_CONTEXT_SERVICE;
+import static
org.apache.nifi.processors.solr.SolrUtils.SOLR_SOCKET_TIMEOUT;
+import static
org.apache.nifi.processors.solr.SolrUtils.SOLR_CONNECTION_TIMEOUT;
+import static
org.apache.nifi.processors.solr.SolrUtils.SOLR_MAX_CONNECTIONS;
+import static
org.apache.nifi.processors.solr.SolrUtils.SOLR_MAX_CONNECTIONS_PER_HOST;
+import static org.apache.nifi.processors.solr.SolrUtils.ZK_CLIENT_TIMEOUT;
+import static
org.apache.nifi.processors.solr.SolrUtils.ZK_CONNECTION_TIMEOUT;
+import static org.apache.nifi.processors.solr.SolrUtils.SOLR_LOCATION;
+import static org.apache.nifi.processors.solr.SolrUtils.BASIC_USERNAME;
+import static org.apache.nifi.processors.solr.SolrUtils.BASIC_PASSWORD;
+import static org.apache.nifi.processors.solr.SolrUtils.RECORD_WRITER;
+
+@Tags({"Apache", "Solr", "Get", "Query", "Records"})
+@InputRequirement(InputRequirement.Requirement.INPUT_ALLOWED)
+@CapabilityDescription("Queries Solr and outputs the results as a FlowFile
in the format of XML or using a Record Writer")
+@WritesAttributes({
+ @WritesAttribute(attribute = "solr.cursor.mark", description =
"Cursor mark can be used for scrolling Solr"),
+ @WritesAttribute(attribute = "solr.status.code", description =
"Status code of Solr request. A status code of 0 indicates that the request was
successfully processed"),
+ @WritesAttribute(attribute = "solr.query.time", description = "The
elapsed time to process the query (in ms)"),
+ @WritesAttribute(attribute = "mime.type", description = "The mime
type of the data format"),
+ @WritesAttribute(attribute = "fetchsolr.exeption.class",
description = "The Java exception class raised when the processor fails"),
+ @WritesAttribute(attribute = "fetchsolr.exeption.message",
description = "The Java exception message raised when the processor fails")
+})
+public class FetchSolr extends SolrProcessor {
+
+ public static final AllowableValue MODE_XML = new
AllowableValue("XML");
+ public static final AllowableValue MODE_REC = new
AllowableValue("Records");
+ public static final String MIME_TYPE_JSON = "application/json";
+ public static final String ATTRIBUTE_CURSOR_MARK = "solr.cursor.mark";
+ public static final String ATTRIBUTE_SOLR_STATUS = "solr.status.code";
+ public static final String ATTRIBUTE_QUERY_TIME = "solr.query.time";
+ public static final String EXCEPTION = "fetchsolr.exeption";
+ public static final String EXCEPTION_MESSAGE =
"fetchsolr.exeption.message";
+
+ public static final PropertyDescriptor SOLR_QUERY_STRING = new
PropertyDescriptor
--- End diff --
I personally prefer "Solr Query String" to mean a lucene style query like
"(foo AND bar)" and then have properties for the common parameters like
start/end row, fq, etc, and then use dynamic props for others.
However if we want to stick with the current approach, I think the
description of this property should mention that value is a URL style query
string and not just a Lucene query. You also may want to implement a custom
validator that ensures this style of query string can be parsed (when EL is not
used).
> Add FetchSolr processor
> -----------------------
>
> Key: NIFI-4516
> URL: https://issues.apache.org/jira/browse/NIFI-4516
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Reporter: Johannes Peter
> Assignee: Johannes Peter
> Priority: Major
> Labels: features
>
> The processor shall be capable
> * to query Solr within a workflow,
> * to make use of standard functionalities of Solr such as faceting,
> highlighting, result grouping, etc.,
> * to make use of NiFis expression language to build Solr queries,
> * to handle results as records.
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