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ASF GitHub Bot commented on NIFI-4345:
--------------------------------------
Github user markap14 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2123#discussion_r138082632
--- Diff: nifi-nar-bundles/nifi-standard-services/nifi-mongodb-services-bundle/nifi-mongodb-services/src/main/java/org/apache/nifi/mongodb/MongoDBLookupService.java
---
@@ -0,0 +1,116 @@
+/*
+ * 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.mongodb;
+
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnEnabled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.controller.ControllerServiceInitializationContext;
+import org.apache.nifi.lookup.LookupFailureException;
+import org.apache.nifi.lookup.LookupService;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.reporting.InitializationException;
+import org.bson.Document;
+import org.codehaus.jackson.map.ObjectMapper;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+
+
+@Tags({"mongo", "mongodb", "lookup", "record"})
+@CapabilityDescription(
+ "Provides lookup service functionality through a configured connection to MongoDB.
" +
+ "One or more keys must defined in LookupRecord in order for it to run. Each value
" +
+ "must correspond to a full field value in the Mongo collection, as this does not
support " +
+ "regular expressions and other features."
+)
+public class MongoDBLookupService extends MongoDBControllerService implements LookupService
{
+
+ public static final PropertyDescriptor LOOKUP_KEY = new PropertyDescriptor.Builder()
+ .name("mongo-lookup-key")
+ .displayName("The key from the result to return")
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .required(true)
+ .defaultValue("somevalue")
+ .build();
+
+ private ObjectMapper mapper;
--- End diff --
I see where `mapper` is initialized, but it doesn't appear to be used anywhere. Can this
be removed?
> Add a controller service and a lookup service for MongoDB
> ---------------------------------------------------------
>
> Key: NIFI-4345
> URL: https://issues.apache.org/jira/browse/NIFI-4345
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Mike Thomsen
>
> - Create a Controller Service that wraps the functionality of the Mongo driver.
> - Create a lookup service that can return elements based on a query.
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