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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NIFI-1022) Create GetTachyon and PutTachyon Processors
Date Sun, 19 Jun 2016 05:07:05 GMT

    [ https://issues.apache.org/jira/browse/NIFI-1022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15338372#comment-15338372
] 

ASF GitHub Bot commented on NIFI-1022:
--------------------------------------

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

    https://github.com/apache/nifi/pull/379#discussion_r67610380
  
    --- Diff: nifi-nar-bundles/nifi-alluxio-bundle/nifi-alluxio-processors/src/main/java/org/apache/nifi/processors/alluxio/AbstractAlluxioProcessor.java
---
    @@ -0,0 +1,113 @@
    +/*
    + * 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.alluxio;
    +
    +import alluxio.client.file.FileSystem;
    +import alluxio.client.file.URIStatus;
    +
    +import org.apache.nifi.components.PropertyDescriptor;
    +import org.apache.nifi.flowfile.FlowFile;
    +import org.apache.nifi.processor.AbstractProcessor;
    +import org.apache.nifi.processor.ProcessContext;
    +import org.apache.nifi.processor.ProcessSession;
    +import org.apache.nifi.processor.util.StandardValidators;
    +
    +import java.lang.reflect.Method;
    +import java.lang.reflect.Modifier;
    +import java.util.ArrayList;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +import java.util.concurrent.atomic.AtomicReference;
    +
    +/**
    + * AbstractCassandraProcessor is a base class for Alluxio processors and contains logic
and variables common to most
    + * processors integrating with Alluxio.
    + */
    +public abstract class AbstractAlluxioProcessor extends AbstractProcessor {
    +
    +    public static final PropertyDescriptor MASTER_HOSTNAME = new PropertyDescriptor.Builder()
    +            .name("alluxio-master-ip")
    +            .displayName("Master hostname")
    +            .description("Hostname of the Alluxio File System Master node.")
    +            .required(true)
    +            .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
    +            .build();
    +
    +    public static final PropertyDescriptor MASTER_PORT = new PropertyDescriptor.Builder()
    +            .name("alluxio-master-port")
    +            .displayName("Master port")
    +            .description("Port to use when connecting to the Alluxio File System Master
node.")
    +            .required(true)
    +            .defaultValue("19998")
    +            .addValidator(StandardValidators.PORT_VALIDATOR)
    +            .build();
    +
    +    public static final PropertyDescriptor URI = new PropertyDescriptor.Builder()
    +            .name("alluxio-uri")
    +            .displayName("URI")
    +            .description("Alluxio URI to use. Example: /path")
    +            .required(true)
    +            .expressionLanguageSupported(true)
    +            .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
    +            .build();
    +
    +    static List<PropertyDescriptor> descriptors = new ArrayList<>();
    +
    +    static {
    +        descriptors.add(MASTER_HOSTNAME);
    +        descriptors.add(MASTER_PORT);
    +        descriptors.add(URI);
    +    }
    +
    +    protected final AtomicReference<FileSystem> fileSystem = new AtomicReference<>(null);
    +
    +    protected void createFileSystem(ProcessContext context) {
    +        System.setProperty("alluxio.master.hostname", context.getProperty(MASTER_HOSTNAME).getValue());
    +        System.setProperty("alluxio.master.port", context.getProperty(MASTER_PORT).getValue());
    +        fileSystem.set(FileSystem.Factory.get());
    --- End diff --
    
    This doesn't seem to update regardless of changing a property.  I accidentally used the
wrong port when testing and despite changing in the properties, stopping/starting or disabling/enabling,
the backing Alluxio client seems stuck on the initial port.


> Create GetTachyon and PutTachyon Processors
> -------------------------------------------
>
>                 Key: NIFI-1022
>                 URL: https://issues.apache.org/jira/browse/NIFI-1022
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Extensions
>            Reporter: Jeremy Dyer
>            Assignee: Pierre Villard
>            Priority: Minor
>         Attachments: Alluxio.xml
>
>
> Provide support for Apache Tachyon by implementing a GetTachyon and PutTachyon processor.
Having the ability to both read and write to Tachyon would assist in sharing data with external
applications such as Spark.



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