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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NIFI-4345) Add a controller service and a lookup service for MongoDB
Date Wed, 06 Sep 2017 20:20:00 GMT

    [ https://issues.apache.org/jira/browse/NIFI-4345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16155970#comment-16155970
] 

ASF GitHub Bot commented on NIFI-4345:
--------------------------------------

Github user mattyb149 commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/2123#discussion_r137376343
  
    --- Diff: nifi-nar-bundles/nifi-standard-services/nifi-mongodb-services-bundle/nifi-mongodb-services/src/main/java/org/apache/nifi/mongodb/AbstractMongoDBControllerService.java
---
    @@ -0,0 +1,223 @@
    +/*
    + * 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 com.mongodb.MongoClient;
    +import com.mongodb.MongoClientOptions;
    +import com.mongodb.MongoClientOptions.Builder;
    +import com.mongodb.MongoClientURI;
    +import com.mongodb.WriteConcern;
    +import com.mongodb.client.MongoCollection;
    +import com.mongodb.client.MongoDatabase;
    +import org.apache.commons.lang3.StringUtils;
    +import org.apache.nifi.annotation.lifecycle.OnStopped;
    +import org.apache.nifi.authentication.exception.ProviderCreationException;
    +import org.apache.nifi.components.PropertyDescriptor;
    +import org.apache.nifi.controller.AbstractControllerService;
    +import org.apache.nifi.controller.ConfigurationContext;
    +import org.apache.nifi.flowfile.FlowFile;
    +import org.apache.nifi.processor.util.StandardValidators;
    +import org.apache.nifi.security.util.SslContextFactory;
    +import org.apache.nifi.ssl.SSLContextService;
    +import org.bson.Document;
    +
    +import javax.net.ssl.SSLContext;
    +import java.io.IOException;
    +import java.util.ArrayList;
    +import java.util.List;
    +
    +public class AbstractMongoDBControllerService extends AbstractControllerService {
    +    static final String WRITE_CONCERN_ACKNOWLEDGED = "ACKNOWLEDGED";
    +    static final String WRITE_CONCERN_UNACKNOWLEDGED = "UNACKNOWLEDGED";
    +    static final String WRITE_CONCERN_FSYNCED = "FSYNCED";
    +    static final String WRITE_CONCERN_JOURNALED = "JOURNALED";
    +    static final String WRITE_CONCERN_REPLICA_ACKNOWLEDGED = "REPLICA_ACKNOWLEDGED";
    +    static final String WRITE_CONCERN_MAJORITY = "MAJORITY";
    +
    +    protected static final PropertyDescriptor URI = new PropertyDescriptor.Builder()
    +            .name("Mongo URI")
    +            .description("MongoURI, typically of the form: mongodb://host1[:port1][,host2[:port2],...]")
    +            .required(true)
    +            .expressionLanguageSupported(true)
    +            .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
    --- End diff --
    
    If you'd like more validation here, you could write a custom Validator that uses [MongoClientURI](http://mongodb.github.io/mongo-java-driver/3.5/javadoc/com/mongodb/MongoClientURI.html)
to check if the URI is valid (I believe it throws an IllegalArgumentException if the URI is
not valid). Just a suggestion though, up to you :)


> 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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